JP5199058B2 - Image reading apparatus, image reading method and program, and image reading system - Google Patents

Description

  The present invention relates to an image reading apparatus that reads a document.

  In the case of an image reading apparatus that reads an image by conveying a document one by one, it is usually impossible to read a document that exceeds the maximum size of a document that can be transported. Therefore, it has been proposed that a document exceeding the maximum size can be read by folding the document in half (Patent Document 1). When a document exceeding the maximum size is folded in half and conveyed, and both sides of the document are read, the entire one side of the document can be acquired as two front and back images. Then, by connecting these two images, it becomes possible to read a document whose size cannot be read by the image reading apparatus. For example, in a scanning device capable of duplex scanning up to A4 size, an A3-sized document is folded in half, double-sided scanning is performed in a folded state, and the scanned front and back images are connected to form an A3-sized document. An image will be obtained. This reading method is called large format reading.

Japanese Patent No. 3437249

  Large format reading is normally performed when the user designates large format reading mode. When a large original that is not half-folded and is smaller than the maximum size is read in a state in which the large-size reading mode is set, an image in which the images on the front and back of the original are connected is generated. For this reason, if the user does not realize that the large-size reading mode is set and reads a normal document having a maximum size or less, an image unintended by the user is generated.

  An object of the present invention is to prevent the generation of an image by large format reading against the user's intention.

According to the present invention, for example, a first reading unit that reads a document conveyed on the conveyance path from the front side, a second reading unit that reads a document conveyed on the conveyance path from the back side, and a user designation Setting means for setting the large format reading mode according to the above, a detection means for detecting whether or not the document conveyed on the conveyance path is a half-folded document, and the document is half-folded based on the detection result of the detection means A determination unit that determines whether the document is in a state in which the document has been placed, and a case in which the large-size reading mode is set by the setting unit, and the determination unit determines that the document is in a half-folded state In addition, there is provided an image reading apparatus comprising a connecting means for connecting the image read by the first reading means and the image read by the second reading means to one image. .

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the image by large format reading is produced | generated contrary to a user's intention.

<First Embodiment>
FIG. 1 is a schematic diagram of an image reading apparatus 100 according to an embodiment of the present invention. Hereinafter, each configuration provided in the image reading apparatus 100 will be described. The sheet stacking unit 101 stacks and stores sheets S that are documents to be read. The discharge stacking unit 102 is a discharge stacking unit that stacks and stores the sheets S that have undergone the image reading process.

  The image reading apparatus 100 includes the following components as an apparatus that conveys the sheet S from the sheet stacking unit 101 to the discharge stacking unit 102. The conveyance guides 103 and 104 define the conveyance path of the sheet S, the conveyance guide 103 defines the lower side of the conveyance path, and the conveyance guide 104 defines the upper side of the conveyance path.

  The pickup roller 111 feeds the sheet S stacked on the sheet stacking unit 101 toward the inside of the apparatus. The pickup roller 111 is supported by a roller holding member 112. The roller holding member 112 is supported so as to be rotatable about the axis of the feed roller 113, and a contact position where the pickup roller 111 contacts the uppermost surface of the sheet S stacked on the sheet stacking unit 101 and a distance that does not interfere with stacking. It is supported to move to the position. The feed roller 112 is rotationally driven by a driving source (not shown) such as a motor, and the driving force is transmitted to the pickup roller 111.

  The sheet regulating member 115 is a member that regulates the position of the stacked sheet leading edge S and aligns the leading edge. The sheet regulating member 115 is rotated by a driving source (not shown) such as a motor between a solid line position substantially parallel to the inclined portion of the lower conveyance guide 103 and a broken line position. The sheet regulating member 115 moves to a position indicated by a solid line when the sheet S is conveyed, and moves to a broken line position when the sheet S is loaded on the sheet stacking unit 101. When the sheet restricting member 115 moves to the position of the broken line, the sheet restricting member 115 comes into contact with a part of the roller holding member 112, and the pickup roller 111 is retracted to a separation position that does not prevent the sheets S from being stacked.

  When rotation of the pickup roller 111 is started, the uppermost sheet S is guided between the feed roller 113 and the separation roller 114. The separation roller 114 is driven to rotate so as to return the sheet S in the direction opposite to the feeding direction of the feeding roller 113, so that when a plurality of sheets S are conveyed, the separation roller 114 can be rolled up into one sheet. . When a large-size reading mode to be described later is set, the separation roller 114 rotates so as to feed the document in the same direction as the feeding roller 113 so that the sheet S is not wound.

  The transport rollers 121 to 124 are rotationally driven by a driving source (not shown) such as a motor. Note that the drive sources of the feed roller 113 and the transport rollers 121 to 124 can be the same. The transport rollers 121 to 124 are arranged so that the driven rollers 131 to 134 are pressed to constitute a roller pair. The sheet S that has passed through the feed roller 113 and the separation roller 114 is nipped and conveyed by these roller pairs and conveyed to the discharge stacking unit 102.

  Next, the configuration of the image reading apparatus 100 other than the apparatus that conveys the sheet S will be described. The double feed detection unit 160 detects whether the sheet S to be conveyed is double fed (two or more sheets are simultaneously conveyed). In the case of this embodiment, the double feed detection unit 160 includes an ultrasonic transmitter 161 and an ultrasonic receiver 162. The ultrasonic transmitter 161 and the ultrasonic receiver 162 are arranged at positions facing each other with the conveyed sheet S interposed therebetween. The ultrasonic signal from the ultrasonic transmitter 161 is attenuated by passing through the sheet S, and the attenuation amount increases as the number of sheets S passing through the sheet S increases. Therefore, a change in the amplitude of the ultrasonic signal received by the ultrasonic receiver 162 between the case where one ultrasonic signal passes through the sheet S and the case where two or more passes through the sheet S is examined in advance, and a threshold for determination is set. By determining, it can be detected whether the conveyed sheet S is being double-fed. In the present embodiment, two types of threshold values for determination are used: a threshold value for determining double feeding of two sheets and a threshold value for determining double feeding of three or more sheets. In this embodiment, double feeding is detected using ultrasonic waves, but other methods such as a method of detecting double feeding using infrared rays can also be adopted.

  The image reading units 140 and 150 include light sources 141 and 152 and image sensors 142 and 152, respectively, and the image sensors 142 and 152 receive the reflected light reflected by the sheet S from the light sources 141 and 152. The image on the sheet S is read. The image sensors 142 and 152 are a CCD line sensor, a CMOS line sensor, or the like. Assuming that the sheet S is stacked with the front side facing up in the sheet stacking unit 101, the image reading unit 140 reads the sheet S from the front side of the sheet S, and the image reading unit 150 reads the sheet from the back side of the sheet S. Read S. That is, the image reading unit 140 reads an image on the front surface of the sheet S, and the image reading unit 150 reads an image on the back surface of the sheet S. The sensor 163 is a sensor that detects the discharge of the sheet S, and is, for example, an optical sensor.

  Next, the configuration of the control system of the image reading apparatus 100 will be described. FIG. 2 is a block diagram of a control system of the image reading apparatus 100. The image reading apparatus 100 includes a control unit 10. The control unit 10 includes a CPU 11, a ROM 12, a RAM 13, an input / output I / F (interface) 14, and a communication I / F (interface) 15.

  The CPU 11 executes a program stored in the ROM 12 and controls the entire image reading apparatus 100. The ROM 12 stores fixed data such as a program executed by the CPU 11 and a threshold value for double feed determination (for two sheets, three sheets or more). The RAM 13 stores image data read by the image sensors 142 and 152 and variable data such as calculation results of the CPU 11. The ROM 12 and RAM 13 may be other storage means.

  The following configuration is connected to the input / output I / F 14 to input / output data to / from the CPU 11. The display 20 is a display device that presents various types of information to the user. The operation unit 21 is an input device for a user to input various instructions. The drive circuit 32 drives the motor 31 that drives the feed roller 113 and the like according to a command from the CPU 11. As described above, the sensor 163 is a sensor that detects the discharge of the sheet S, and the CPU 11 can acquire the detection result.

  The drive circuit 33 drives the ultrasonic transmitter 161 according to a command from the CPU 11. The drive circuit 34 drives the light sources 141 and 151 according to a command from the CPU 11. The amplification circuit 35 amplifies the analog signal output from the ultrasonic receiver 162, and the A / D conversion circuit 36 converts the amplified signal from an analog signal to a digital signal. Thereby, the CPU 11 can obtain the detection result of the ultrasonic receiver 162.

  The A / D converter 37 and the image processing circuit 38 are provided for each of the image sensors 142 and 152. The A / D converter 37 converts a signal indicating an image output from the image sensors 142 and 152 into a digital image signal. The image processing circuit 38 adjusts color balance and the like for the digital image signal converted by the A / D converter 37. The CPU 11 can acquire the image signal output from the image processing circuit 38.

  A PC (personal computer) 200 can be connected to the communication I / F 15, whereby the CPU 11 can communicate with the PC 200. The communication I / F 15 may be an interface for connecting to a network.

  FIG. 3 is a block diagram of the PC 200. The PC 200 is a general personal computer and includes a control unit 210. The control unit 210 includes a CPU 211, a ROM 212, a RAM 213, an HDD (hard disk drive) 214, an input / output I / F (interface) 215, and a communication I / F (interface) 216.

  The CPU 211 executes a program stored in the ROM 212 or the HDD 214. For example, a driver for the image reading apparatus 100 is stored in the HDD 214. The ROM 212, RAM 213, and HDD 214 may be other storage means. An input unit 221 such as a keyboard and a mouse and a display 220 are connected to the input / output I / F 215. The image reading apparatus 100 is connected to the communication I / F 216.

Next, processing executed by the CPU 11 of the image reading apparatus 100 or the CPU 211 of the PC 200 will be described. FIG. 4 is a flowchart showing the mode designation process. The mode specifying process is a process of setting the reading mode of the sheet S in the image reading apparatus 100 according to the user's specification. In the present embodiment, the following three types of modes are assumed. In addition, for example, a black and white reading mode and a color reading mode may be set.
Single-sided reading mode: One side (here, the front side) of the sheet S is read, and a read image file is generated.
Double-sided reading mode: Reads both sides of the sheet S, and generates one image file for the read front side image and one file for the back side image, for a total of two image files.
Large-format reading mode: The upper and lower surfaces of the half-folded sheet S are read, and the read upper surface image and lower surface image are connected to generate one image file.

  Large format reading will be described with reference to FIGS. FIG. 5A illustrates an example of a document that is twice as large as a size that can be read by the image reading apparatus 100 without being folded in half. For example, when the image reading apparatus 100 can read a document up to A4 size without being folded in half, it is an A3 size document.

  When reading the original in FIG. 5A, as shown in FIG. 5B, it is rotated 90 degrees to the left, and the right half is folded back to the back side of the original by a broken line and set on the sheet stacking unit 101. When the half-folded document is conveyed and double-sided reading is performed, the image read by the image reading unit 140 is as shown in FIG. 5C, and the image read by the image reading unit 150 is shown in FIG. d). Then, when these images are connected at a half-folded portion of the original and further rotated 90 degrees to the right, an image obtained by reading the original in FIG. 5A is obtained.

  The mode specifying process in FIG. 4 can be executed by the CPU 11 of the image reading apparatus 100 or the CPU 211 of the PC 200. When the CPU 11 of the image reading apparatus 100 executes, guidance for mode designation to the user is performed by the display 20, and the mode designation operation of the user is received by the operation unit 21. When the CPU 211 of the PC 200 executes, guidance for mode designation to the user is performed by the display 220, and the mode designation operation of the user is received by the input unit 221.

  In FIG. 4, in S1, it is determined whether or not the mode specified by the user is the single-sided reading mode. If applicable, the process proceeds to S4, and if not, the process proceeds to S2. In S2, it is determined whether or not the mode designated by the user is the duplex reading mode. If yes, go to S5, otherwise go to S3. In S3, it is determined whether or not the mode designated by the user is the large format reading mode. If applicable, the process proceeds to S6, and if not, the process returns to S1.

  A single-sided reading mode is set in S4, a double-sided reading mode is set in S5, and a large-size reading mode is set in S6. The mode can be set by, for example, storing the mode type designated by the user in a predetermined storage area of the RAM 13 or RAM 213.

  FIG. 6 is a flowchart showing the reading process. Here, a case where the reading process is executed by the CPU 11 of the image reading apparatus 100 will be described as an example. The CPU 11 of the image reading apparatus 100 starts the reading process in response to a user instruction via the operation unit 21 or a user instruction via the PC 200.

  In S <b> 11, the conveyance of the uppermost sheet S stacked on the sheet stacking unit 101 is started. Here, the pickup roller 111 is driven by driving the feed roller 113 to convey the sheet S into the apparatus. At this time, when the large-size reading mode is set, the rotation direction of the separation roller 114 is the same as that of the feed roller 113, and when a mode other than the large-size reading mode is set, the rotation direction of the separation roller 114 is the feed direction. The direction is opposite to that of the roller 113.

  In S12, a threshold for double feed determination is set according to the current mode. When the large-size reading mode is set, a threshold value for determining three or more double feeds is set. When a mode other than the large-size reading mode is set, a threshold value for determining two-sheet double feeding is set. When the large-size reading mode is set, the sheet S is conveyed in a half-folded state, so that it is erroneously determined to be double feeding if a threshold for determining double feeding is used. Therefore, in the present embodiment, different threshold values are set depending on whether the large format reading mode is set or not. Thereby, it is possible to avoid a case where the double feed is erroneously determined when the large format reading mode is set. The threshold value can be set by reading the threshold value from the ROM 12 and storing it in a predetermined storage area of the RAM 13.

  In S13, it is determined whether or not the sheet S being conveyed is double-fed. Here, an ultrasonic wave is oscillated from the ultrasonic transmitter 161 and the reception result of the ultrasonic receiver 162 is acquired. Then, the occurrence of double feeding is determined by comparing the threshold set in S12 with the reception result. For example, when the amplitude of the received ultrasonic signal (the amplitude after amplification by the amplification circuit 35) is smaller than the threshold value, it is determined that double feeding has occurred. If it is determined that double feeding has occurred, for example, the conveyance of the sheet S is interrupted, and an error notification is given to the user.

  In S14, the image of the sheet S is read. When the single-sided reading mode is set, the image is read by only the image reading unit 140, and when the double-sided reading mode or the large size reading mode is set, the image is read by both the image reading units 140 and 150. In S15, the conveyance of the sheet S is ended based on the detection result of the sensor 163.

  In S16, it is determined whether or not the large format reading mode is set. If yes, go to S17, otherwise go to S18. A half-fold determination process is executed in S17, and an image file creation process is executed in S18. Details will be described later. In S19, the image file created in S18 is output to the PC 200, and one unit of processing is completed.

  FIG. 7 is a flowchart showing an example of the half-fold determination process in S17. The half-fold determination process is a process for determining whether or not the sheet S to be read is half-folded. In the case of the present embodiment, the reception result of the ultrasonic receiver 162 acquired in S13 is compared with a threshold value for determining double feeding, and it is determined whether the sheet S is half-folded. That is, since the state in which the sheet S is half-folded is the same state as when the two sheets S are double-fed, the threshold value for determining the double-fed double sheet is used as the threshold value for half-fold determination. It can be determined whether or not is half-folded.

  In FIG. 7, in S21, whether the amplitude of the ultrasonic signal (the amplitude after amplification by the amplification circuit 35) indicated by the reception result of the ultrasonic receiver 162 acquired in S13 is smaller than the threshold for determining double feeding. Determine whether or not. If it is smaller, the process proceeds to S22, and if not, the process proceeds to S23. In S22, the half-fold determination result is a half-folded document, and in S23, the half-fold determination result is a normal document (one sheet that is not half-folded).

  FIG. 8 is a flowchart showing an example of the image file creation processing in S18. The image file creation process is a process for generating an image file of the read image. In S31, it is determined whether or not the large format reading mode is set. If applicable, the process proceeds to S32. Otherwise, the process proceeds to S34. In S32, it is determined whether the result of the half-fold determination in S17 is a half-fold original. If applicable, the process proceeds to S33, and if not, the process proceeds to S36 as indicated by S35 or a broken line L. For example, when it is determined that the back of the sheet S is blank, it is preferable to proceed to S36, and otherwise proceed to S35.

  In S33, a connection process is performed. Here, as described with reference to FIGS. 5A to 5D, an image read by the image reading unit 140 and an image read by the image reading unit 150 are connected to form one image. Create a modified image file. In S34, it is determined whether or not the duplex reading mode is set. If applicable, the process proceeds to S35, and if not, the single-sided reading mode is set and the process proceeds to S36.

  In S35, one image file is created for the image read by the image reading unit 140, one image file is created for the image read by the image reading unit 150, and a total of two image files are created. In S36, one image file is created for the image read by the image reading unit 140. This completes one unit.

  As described above, in this embodiment, only when the large-size reading mode is set and it is determined that the document is a half-fold original, the connection processing is performed in S33 and an image by large-size reading is generated. Therefore, when the user mistakenly sets the large format reading mode, or when the user does not notice that the large format reading mode is set and reads the normal sheet S that is not half-folded. However, an image by large format reading is not generated. Therefore, it is possible to prevent an image by large format reading from being generated against the user's intention.

  If the large-size reading mode is set and the document is not determined to be a half-fold original, the image file for each side is generated by executing the process of S35 (or S36). Therefore, it is not necessary to reread the read sheet S, and user convenience can be improved. In addition, when a plurality of half-folded originals are stacked and continuously read on the sheet stacking unit 101, even when normal originals are mixed, it is not necessary to reset the reading mode one by one, and the convenience for the user can be improved.

  In this embodiment, the half-fold determination (S17) is performed after the end of conveyance (S15). However, the half-fold determination may be performed at the same time as the multi-feed determination in S13. In addition, when the document is not determined to be a half-fold original during the large-size reading mode setting, the user may be able to specify in advance whether to execute the process of S35 or the process of S36.

Second Embodiment
FIG. 9 is a flowchart illustrating an example of another reading process instead of the reading process of FIG. The same processes as those in FIG. 6 are denoted by the same reference numerals, description thereof is omitted, and different processes are described. In this embodiment, after half-fold determination (S17), a notification process is performed in S40. In addition, an image file creation process instead of the image file creation process in S18 is performed in S18 ′.

  FIG. 10A is a flowchart illustrating an example of the notification process in S40. In S41, it is determined whether or not the determination result of the half-fold determination process in S17 is a half-fold original. If applicable, the process of one unit is terminated. If not, the process proceeds to S42. In S42, display processing is performed. Here, the large format reading mode is set, but notification is made by displaying on the display 20 or instructing the PC 200 to display on the display 220 that the read original is not a half-folded original. To do. The notification may use voice.

In S43, a selection acceptance process is performed. Here, for example, the user can select any of the following via the operation unit 21 or the input unit 221.
○ Continue processing in large format reading mode.
○ Change to double-sided scanning mode or single-sided scanning mode.
○ Stop processing.
Note that the change to the double-sided reading mode or the single-sided reading mode may be a temporary change limited to this time.

  FIG. 10B is a flowchart showing the image file creation processing in S18 '. In S51, it is determined whether or not the large format reading mode is set. If applicable, the process proceeds to S52, and if not, the process proceeds to S53. In S52, a connection process is performed. Here, as described with reference to FIGS. 5A to 5D, an image read by the image reading unit 140 and an image read by the image reading unit 150 are connected to form one image. Create a modified image file. In S53, it is determined whether or not the duplex reading mode is set. If applicable, the process proceeds to S54. If not, the single-sided reading mode is set and the process proceeds to S55.

  In S54, one image file is created for the image read by the image reading unit 140, one image file is created for the image read by the image reading unit 150, and a total of two image files are created. In S55, one image file is created for the image read by the image reading unit 140. This completes one unit.

  As described above, in the present embodiment, when the large-size reading mode is set and the document is not determined to be a half-fold original, this is notified to the user (S42), and the mode can be changed to another mode or the like. (S43). Accordingly, the user can obtain an image in the originally intended reading mode without requiring rereading of the read sheet S, and the convenience of the user can be improved.

<Third Embodiment>
In the first and second embodiments, the half-fold determination (S17) is performed based on the reception result of the ultrasonic receiver 162, but may be performed based on the images read by the image reading units 140 and 150.

  FIG. 11A is a flowchart showing another example of the half-fold determination process (S17). In S61, it is determined whether or not both the image read by the image reading unit 140 and the image read by the image reading unit 140 are images obtained by reading a blank sheet. If both are not blank images, the process proceeds to S62 and is determined to be a half-fold original. If either or both are blank images, the process proceeds to S63 and is determined to be a normal document. If the read original is not a half-fold original but a normal original, the back side may be blank. Therefore, if any one of the reading surfaces is blank, it can be determined that the document is not a half-fold original.

  As a known image reading apparatus, a blank page skip function is provided that detects that the read image is an image having only a background such as a blank sheet, and does not output an unnecessary image that does not need to be output. The ones provided are proposed. In the determination of S61, a blank image recognition technique in an apparatus having such a blank page skip function may be used.

  FIG. 11B is a flowchart showing another example of the half-fold determination process (S17). In S71, it is determined whether both the image read by the image reading unit 140 and the image read by the image reading unit 140 are color images. If both are color images, the process proceeds to S72 and is determined to be a half-fold original. If one or both are not color images, the process proceeds to S73 and is determined to be a normal document. When the read original is a half-fold original, the image usually does not change from a color image to a monochrome image at the half-fold line. Conversely, in the case of a normal document, the back side may be blank. Therefore, when a color image is read from both reading surfaces, it can be determined that the document is a half-fold original.

  As a known image reading apparatus, when a scanned image is a black and white image, and a color scan is performed, it is detected that it is not a color image, and is automatically converted into a black and white image and output. The one with is proposed. In the determination of S71, a color / monochrome image recognition technique in an apparatus having such a color image detection function may be used.

<Fourth embodiment>
In each of the embodiments described above, the reading process of FIGS. 6 and 9 has been described as being executed by the CPU 11 of the image reading apparatus 100. However, the CPU 211 of the PC 200 executes at least a part of the steps of the reading process. You can also. For example, the CPU 211 can execute the connection process of S33 and S52. In this case, the image read by the image reading unit 140 and the image read by the image reading unit 140 are output to the PC 200 first.

  In addition, the CPU 211 can execute the half-fold determination in S17. In this case, the reception result (first embodiment) necessary for the determination (first embodiment) and the images read by the image reading units 140 and 150 (third embodiment) are output to the PC 200 first. Become. The image reading apparatus of the present invention can be configured as a system in which at least a part of various processes is performed by an external apparatus such as the PC 200 as described above.

1 is a schematic diagram of an image reading apparatus 100 according to an embodiment of the present invention. 2 is a block diagram of a control system of the image reading apparatus 100. FIG. It is a block diagram of PC200. It is a flowchart which shows the example of a mode designation | designated process. (A) thru | or (d) are explanatory drawings of large format reading. It is a flowchart which shows the example of a reading process. It is a flowchart which shows the example of the half-fold determination process of S17. It is a flowchart which shows the example of the image file creation process of S18. 7 is a flowchart illustrating an example of another reading process instead of the reading process of FIG. 6. (A) is a flowchart showing an example of notification processing in S40, and (b) is a flowchart showing image file creation processing in S18 '. (A) And (b) is a flowchart which shows the other example of a half-fold determination process (S17).

Explanation of symbols

100 Image reading device 140, 150 Image reading unit

Claims (22)

First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Detecting means for detecting whether or not the document conveyed on the conveyance path is a half-folded document ;
Determining means for determining whether the original is a half-folded original based on the detection result of the detecting means;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is in a half-folded state, the image read by the first reading unit and the first A connecting means for connecting the image read by the two reading means to one image;
An image reading apparatus comprising: First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
An ultrasonic transmitter for transmitting ultrasonic waves to a document;
An ultrasonic receiver disposed opposite the ultrasonic transmitter;
Determining means for determining whether or not a document transported on the transport path is a half-folded document based on a reception result from the ultrasonic receiver ;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit Connecting means for connecting the image read by the means to one image;
An image reading apparatus comprising: An output means for outputting an image connected by the connecting means;
The output means is the case where the large-size reading mode is set by the setting means, and when the determination means determines that the original is not half-folded, the image read by the first reading means and the the image reading apparatus according to claim 1 or 2, characterized in that outputs at least one of the image by the second reading means read. In the case where the large-size reading mode is set by the setting unit, and the determination unit determines that the document is not a half-folded document, a notification unit that notifies the user of this is provided. the image reading apparatus according to claim 1 or 2. The ultrasonic oscillator and the ultrasonic receiver are double feed detection means for detecting whether or not a plurality of originals are conveyed in a superimposed manner on the conveyance path ,
In the case where the large-size reading mode is set by the setting unit and the multi-feed detection unit detects that a plurality of originals are being transported in an overlapping manner, the determination unit moves on the transport path. The image reading apparatus according to claim 2 , wherein the conveyed document is determined to be a half-folded document. First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit Connecting means for connecting the image read by the means to one image;
And a double feed detecting means for detecting whether or not it is conveyed to the conveying path overlapping a plurality of originals,
In the case where the large-size reading mode is set by the setting unit and the multi-feed detection unit detects that a plurality of originals are being transported in an overlapping manner, the determination unit moves on the transport path. images reader you characterized in that the document conveyed is determined to be a document that is semi-folded. First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit An image read by the means, and connecting means for connecting the images to one image,
In the determination unit, when the image read by the first reading unit and the image read by the second reading unit are not both blank images, the document conveyed on the conveyance path is half-folded. images reader shall be the determining means determines that a document. First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit An image read by the means, and connecting means for connecting the images to one image,
The determination unit is a document in which the document conveyed on the conveyance path is half-folded when both the image read by the first reading unit and the image read by the second reading unit are color images. images reader shall be the determining means determines that there. First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit Connecting means for connecting the image read by the means to one image;
A multi-feed detection means for detecting whether or not a plurality of documents are transported on the transport path;
A double feed determination means for comparing the detection result of the double feed detection means with a determination threshold value to determine whether double feed is occurring,
In the case where the large-size reading mode is set by the setting unit and the multi-feed determining unit determines that multi-feed has occurred, the determination unit determines that a document conveyed on the conveyance path is Determine that the document is half-folded,
The determination threshold, and if the large-sized reading mode is set, and the case has not been set, the read images you characterized in that different values are set device. A setting process for setting a large format reading mode according to a user's specification;
A detection step of detecting whether or not the document conveyed on the conveyance path is a half-folded document ;
A determination step of determining whether or not the original is a half-folded original by the detection step ;
When the large-size reading mode is set by the setting step, and when it is determined that the document is a half-folded document in the determination step, the document transported on the transport path is viewed from the front side. A connecting step of connecting the image read by the first reading means and the image read by the second reading means for reading the document conveyed on the conveyance path from the back side into one image;
An image reading method comprising: A setting process for setting a large format reading mode according to a user's specification;
It is determined whether or not the original conveyed on the conveyance path is a half-folded original based on the ultrasonic reception result obtained from the ultrasonic receiver by transmitting ultrasonic waves to the original. A determination process;
When the large-size reading mode is set in the setting step, and when it is determined that the original is a half-folded original in the determination step, the original conveyed on the conveyance path is read from the front side. A connecting step of connecting an image read by one reading unit and an image read by a second reading unit that reads a document conveyed on the conveyance path from the back side thereof into one image;
An image reading method comprising: A setting process for setting a large format reading mode according to a user's specification;
A multi-feed detection step for detecting whether or not a plurality of documents are transported on the transport path ;
A determination step of determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set in the setting step, and when it is determined that the original is a half-folded original in the determination step, the original conveyed on the conveyance path is read from the front side. A coupling step of coupling an image read by one reading unit and an image read by a second reading unit that reads a document conveyed on the conveyance path from the back side thereof into one image ;
In the determination step, when the large-size reading mode is set in the setting step, and when it is detected in the double feed detection step that a plurality of documents are conveyed in a superimposed manner, the determination step is performed on the conveyance path. An image reading method comprising: determining that a conveyed document is a half-folded document . A setting process for setting a large format reading mode according to a user's specification;
A determination step of determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set in the setting step, and when it is determined that the original is a half-folded original in the determination step, the original conveyed on the conveyance path is read from the front side. A coupling step of coupling an image read by one reading unit and an image read by a second reading unit that reads a document conveyed on the conveyance path from the back side thereof into one image ;
In the determination step, when both the image read by the first reading unit and the image read by the second reading unit are not images obtained by reading blank paper, the document conveyed on the conveyance path is half-folded. An image reading method characterized in that it is determined as an original . A setting process for setting a large format reading mode according to a user's specification;
A determination step of determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set in the setting step, and when it is determined that the original is a half-folded original in the determination step, the original conveyed on the conveyance path is read from the front side. A coupling step of coupling an image read by one reading unit and an image read by a second reading unit that reads a document conveyed on the conveyance path from the back side thereof into one image ;
In the determination step, when both the image read by the first reading unit and the image read by the second reading unit are color images, the original conveyed on the conveyance path is a half-folded original. An image reading method characterized in that it is determined that there is an image. A setting process for setting a large format reading mode according to a user's specification;
A multi-feed detection step for detecting whether or not a plurality of documents are transported on the transport path;
A detection result of the double feed detection step and a determination threshold value are compared, and a double feed determination step of determining whether double feed has occurred,
A determination step of determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set in the setting step, and when it is determined that the original is a half-folded original in the determination step, the original conveyed on the conveyance path is read from the front side. A coupling step of coupling an image read by one reading unit and an image read by a second reading unit that reads a document conveyed on the conveyance path from the back side thereof into one image ;
In the determination step, when the large-size reading mode is set by the setting step, and the double-feed determination step determines that double-feed is occurring, a document conveyed on the conveyance path is Determine that the document is half-folded,
2. The image reading method according to claim 1, wherein different values are set as the determination threshold value when the large-size reading mode is set and when the large-size reading mode is not set . A program for causing a computer to execute the image reading method according to any one of claims 10 to 15 . In an image reading system comprising an image reading device for reading both sides of a document and a computer connected to the image reading device,
First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Detecting means for detecting whether or not the document conveyed on the conveyance path is a half-folded document;
Determining means for determining whether the original is a half-folded original based on the detection result of the detecting means;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is in a half-folded state, the image read by the first reading unit and the first A connecting means for connecting the image read by the two reading means to one image;
An image reading system comprising: In an image reading system comprising an image reading device for reading both sides of a document and a computer connected to the image reading device,
First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
An ultrasonic transmitter for transmitting ultrasonic waves to a document;
An ultrasonic receiver disposed opposite the ultrasonic transmitter;
Determining means for determining whether or not a document transported on the transport path is a half-folded document based on a reception result from the ultrasonic receiver;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit Connecting means for connecting the image read by the means to one image;
An image reading system comprising: In an image reading system comprising an image reading device for reading both sides of a document and a computer connected to the image reading device,
First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit Connecting means for connecting the image read by the means to one image;
A multi-feed detection means for detecting whether or not a plurality of documents are transported on the transport path,
In the case where the large-size reading mode is set by the setting unit and the multi-feed detection unit detects that a plurality of originals are being transported in an overlapping manner, the determination unit moves on the transport path. An image reading system that determines that a document to be conveyed is a half-folded document. In an image reading system comprising an image reading device for reading both sides of a document and a computer connected to the image reading device,
First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit An image read by the means, and connecting means for connecting the images to one image,
In the determination unit, when the image read by the first reading unit and the image read by the second reading unit are not both blank images, the document conveyed on the conveyance path is half-folded. An image reading system that determines that a document is a document. In an image reading system comprising an image reading device for reading both sides of a document and a computer connected to the image reading device,
First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit An image read by the means, and connecting means for connecting the images to one image,
The determination unit is a document in which the document conveyed on the conveyance path is half-folded when both the image read by the first reading unit and the image read by the second reading unit are color images. An image reading system characterized in that it is determined to be present. In an image reading system comprising an image reading device for reading both sides of a document and a computer connected to the image reading device,
First reading means for reading a document conveyed on the conveying path from the front side;
Second reading means for reading a document conveyed on the conveyance path from the back side;
Setting means for setting a large format reading mode according to a user's specification;
Determining means for determining whether or not the document transported on the transport path is a half-folded document;
When the large-size reading mode is set by the setting unit and the determination unit determines that the document is a half-folded document, the image read by the first reading unit and the second reading unit Connecting means for connecting the image read by the means to one image;
A multi-feed detection means for detecting whether or not a plurality of documents are transported on the transport path;
A double feed determination means for comparing the detection result of the double feed detection means with a determination threshold value to determine whether double feed is occurring,
In the case where the large-size reading mode is set by the setting unit and the multi-feed determining unit determines that multi-feed has occurred, the determination unit determines that a document conveyed on the conveyance path is Determine that the document is half-folded,
2. The image reading system according to claim 1, wherein the determination threshold value is set differently depending on whether the large-size reading mode is set or not.

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