KR100771119B1 - Plurality of image data merging method and device thereof - Google Patents

Abstract

The present invention relates to a method and an apparatus for summing a plurality of individual image data into one image data. According to an exemplary embodiment of the present invention, the data summing unit analyzes header information of a plurality of individual image data corresponding to a data summing command, and reads an interval of an RST marker defined in the DRI marker of each header information; A data summing unit comparing intervals of the plurality of RST markers; Generating, by the data summing unit, corrected header information corresponding to a preset summing method when the intervals of the plurality of RST markers are all the same; And generating a sum image data corresponding to the corrected header information by the data sum unit. According to the present invention, when summing separate image data into one image data, it is not necessary to secure a large amount of storage area.

JPEG, DRI Marker, RST Marker, Codec

Description

A plurality of individual image data summing method and apparatus therefor {Plurality of image data merging method and device approximately}

1 is a block diagram of an image processing apparatus according to an exemplary embodiment of the present invention.

2 is a diagram of an overall structure of general JPEG data.

3 is a table illustrating markers used in general jpeg data.

4 is a table illustrating the structure of a typical SOF marker.

Figure 5a is an illustration of a summing method in accordance with a preferred embodiment of the present invention.

Figure 5b is another illustration of a summing method in accordance with a preferred embodiment of the present invention.

Figure 5c is another illustration of a summing method according to a preferred embodiment of the present invention.

6 is a diagram illustrating modified header information according to an embodiment of the present invention.

7 is a block diagram of aggregated image data according to an embodiment of the present invention.

8 is a flowchart illustrating a method of summing a plurality of individual image data according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: image processing device

110: data summing unit

120: jpeg codec unit

120-1: Sampling unit

120-2: discrete cosine transform unit

120-3: Quantization

120-4: entropy coding unit

120-5: Quantization Table

120-6: Entropy Coding Table

130: storage unit

The present invention relates to a video data processing method and apparatus, and more particularly, to a method and apparatus for summing separate video data.

Image processing apparatuses are used in various digital processing apparatuses, such as digital cameras, mobile phones, and computers, and are particularly related to image compression technology. In general, image compression technology is commonly used for JPEG (hereinafter referred to as `` JPEG '') in the case of still images, MPEG (hereinafter referred to as `` MPEG '') in the case of video. Here, the JPEG standard ISO / IEC 10918 (hereinafter, referred to as the 'JPEG standard') is the still image compression format which is most used today.

In general, the JPEG encoder divides original image data into 8x8 blocks and performs Discrete Cosine Transformation (DCT) on each block. Thereafter, quantization is performed on the input image data (i.e., discrete cosine transformed original image data), entropy coding is performed, a header is added, and the image data is stored according to a predetermined format.

Then, the JPEG decoder reads and decodes the JPEG data (that is, the image data generated and stored by the JPEG encoder), dequantizes it, and performs Inverse Discrete Cosine Transformation (IDCT) on each block. To reconstruct the original image.

Furthermore, recent image processing apparatuses are also equipped with a function (eg, a matrix imaging function, a panorama imaging function, etc.) for summing up separate image data and reconstructing it into one image data. That is, the plurality of raw data input in the matrix and / or panoramic photographing mode, respectively, are encoded into one image data data by the image processing apparatus. In addition, each of the plurality of image data captured in the normal photographing mode and stored in the storage area may be reconstructed into one image data by the image processing apparatus. That is, the image processing apparatus may reconstruct each of the plurality of image data captured and stored as original data and then reconstruct it into one image data.

However, when the separate image data is summed into one image data by the above-described method, for example, a plurality of raw data input in the matrix and / or panorama photographing mode are reconstructed into one image data. In this case, a storage area for storing a plurality of original data should be secured. In addition, even when reconstructing a plurality of image data, each photographed and stored into one image data, a storage area for storing each decoded original data should be secured. Since the original data has a much larger capacity than the encoded (ie, compressed) image data, the storage area is particularly problematic in a portable digital processing apparatus that does not have a large storage area. In other words, the portable digital processing apparatus includes a storage area having a relatively (relatively) small capacity in accordance with the size and purpose of the terminal, so as to secure a large amount of storage area when reconstructing a plurality of high capacity and high pixel image data into one image data. There is a difficult problem. In addition, when the separate image data stored in the storage area is summed into one image data by the above-described method, processing time is long because each image data must be decoded into original data.

Accordingly, an aspect of the present invention is to provide a plurality of individual image data summing methods and apparatuses capable of summing separate image data into one image data without occupying a large amount of storage area.

Another object of the present invention is to provide a plurality of individual image data summing methods and apparatuses capable of summing each of a plurality of image data stored in a storage area into one image data without decoding each image data.

In addition, the present invention is to provide a plurality of individual image data summing method and apparatus capable of shortening the processing time for summing separate image data into one image data.

Other objects of the present invention will be readily understood through the following description.

In order to achieve the above objects, an image processing apparatus according to an aspect of the present invention is provided.

According to an exemplary embodiment of the present invention, when an image data summing command is received, the data summing unit may include a data adder configured to add a corresponding plurality of individual image data to generate one combined image data, wherein the data adder includes the plurality of individual image data. If all of the restart intervals of the RST (Restart) markers defined in the DRI (Define Restart Interval) markers of the header information are the same, modification header information corresponding to a preset summation method is generated and corresponding to the modification header information. Provided is an image processing apparatus characterized by generating summed image data.

The image processing apparatus may further include a Jpec codec unit, wherein the data summing unit analyzes header information of the plurality of pieces of individual image data to determine that the DRI marker is not defined in at least one of header information of all of the pieces of individual image data. The plurality of individual image data may be transmitted to the Jpec codec unit.

The image processing apparatus further includes a Jpec codec unit, wherein the data summing unit analyzes header information of the plurality of pieces of individual image data to determine at least one value of the DRI markers defined in header information of the plurality of pieces of individual image data. If different from the rest, the plurality of pieces of individual image data may be transmitted to the JPEG codec unit.

The image processing apparatus further includes a storage unit, wherein the Jpec codec unit decodes the plurality of individual image data received from the data summing unit into raw data, adds them by a preset method, and then adds them again. It can be encoded and stored in the storage.

The modified header information may be a modification of information on a vertical size and a horizontal size of an image included in arbitrary header information among the plurality of header information.

In order to achieve the above objects, a plurality of individual image data summing method according to an aspect of the present invention is provided.

According to an exemplary embodiment of the present invention, in a plurality of individual image data summing methods, a data adding unit analyzes header information of a plurality of individual image data corresponding to a data summing command to define DRI (Define Restart Interval) of each header information. Reading a restart interval of the RST (Restart) marker defined in the marker; Comparing the intervals of the plurality of RST markers by the data summing unit; Generating, by the data summing unit, modified header information corresponding to a preset summing method when the intervals of the plurality of RST markers are all the same; And generating, by the data summing unit, aggregated image data corresponding to the corrected header information.

The plurality of individual image data summing methods may include: determining whether the DRI marker is defined in header information of all of the plurality of individual image data units by the data summing unit; And when the DRI marker is not defined in at least one or more of header information of all the individual image data, transmitting the plurality of individual image data to the JPEG codec unit.

The plurality of individual image data summing methods may include: comparing, by the data summing unit, header information of the plurality of individual image data to read and compare the DRI markers defined in the header information of the plurality of individual image data; And transmitting the plurality of pieces of individual image data to a JPEG codec unit when at least one or more values of the DRI markers defined in the header information of the plurality of pieces of individual image data are different from others. Can be.

The plurality of individual image data summing methods may include: decoding the plurality of individual image data received from the data summing unit into raw data by the J-CODEC coder; Summing the decoded plurality of original data by the J-CODEC coder by a preset method; The JPEG codec unit may further include re-encoding the summed original data and storing the encoded original data in the storage unit.

The modified header information may be a modification of information on a vertical size and a horizontal size of an image included in arbitrary header information among the plurality of header information.

In order to achieve the above objects, there is provided a multimedia processor according to an aspect of the present invention.

According to an exemplary embodiment of the present invention, when an image data summing command is received, the data summing unit includes a data summing unit configured to add a plurality of corresponding individual image data to generate one sum image data, wherein the data summing unit comprises the plurality of individual images. If all of the restart intervals of the RST (Restart) markers defined in the DRI (Define Restart Interval) markers of the header information of the data are the same, modification header information corresponding to a preset summation method is generated, and the modification header information A multimedia processor is provided which generates corresponding summed image data.

In order to achieve the above objects, a recording medium for recording a program according to an aspect of the present invention is provided.

According to a preferred embodiment of the present invention, in a recording medium on which a plurality of individual image data summing programs are recorded in an image processing apparatus or a multimedia processor, header information of a plurality of individual image data corresponding to a data summing command is analyzed and analyzed. Reading a restart interval of an RST (Restart) marker defined in a DRI (Define Restart Interval) marker of the header information; Comparing intervals of the plurality of RST markers; Generating modified header information corresponding to a preset summation method when all of the plurality of RST markers have the same interval; And a function including a function of generating aggregated image data corresponding to the corrected header information.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Ordinal numbers (eg, first and second) added to distinguish the same or similar components in the present specification are merely added in the order in which each component is described for each paragraph or description. It should be noted that this is not intended to specify the name of each component or to limit the scope of rights.

The following merely illustrates the principles of the invention. Therefore, those skilled in the art, although not explicitly described or shown herein, can embody the principles of the present invention and invent various methods and apparatus using the same that are included in the concept and scope of the present invention. In addition, it is to be understood that all details, including the principles, aspects, and embodiments of the present invention, as well as listing specific embodiments, are intended to include structural and functional equivalents.

FIG. 1 is a block diagram of an image processing apparatus according to an exemplary embodiment of the present invention, FIG. 2 is a diagram of an entire structure of general JPEG data, and FIG. 3 is a table illustrating markers used in general JPEG data. to be. 4 is a table illustrating a structure of a general SOF marker, Figure 5a is an illustration of a summing method according to a preferred embodiment of the present invention, Figure 5b is a summing method according to a preferred embodiment of the present invention Another exemplary diagram, Figure 5c is another exemplary diagram for the summation method according to a preferred embodiment of the present invention. 6 is a diagram illustrating modified header information according to a preferred embodiment of the present invention, and FIG. 7 is a block diagram of aggregated image data according to a preferred embodiment of the present invention.

Referring to FIG. 1, an image processing apparatus 100 according to an exemplary embodiment of the present invention may include a data summing unit 110, a Jpec codec unit 120, and a storage unit 130.

The J-CODEC coder 120 includes a sampling unit 120-1, a discrete cosine transform unit 120-2, a quantization unit 120-3, an entropy coding unit 120-4, and a quantization table 120-5. The entropy coding table 120-6 may be included.

In addition, although not shown, the image processing apparatus 100 according to an exemplary embodiment of the present invention further includes an input unit for receiving a user's button operation to generate a corresponding signal, a display unit for displaying the captured image to the outside, and the like. It may be included.

First, for convenience of understanding and explanation, the overall structure of the general JPEG data will be briefly described with reference to FIG. 2. As shown in FIG. 2, the JPEG data is divided into a plurality of blocks such as a file header, table information, frame information, scan information, and the like. Each block is separated by a marker, and each marker is two-byte data starting with hFF (where h is an hexadecimal identifier) and ends with a marker alone. There is also a stick. If additional data is attached after the marker, information including two bytes of data length information is placed after the marker, and then additional data information is placed. Hereinafter, file header, table information, frame information, and scan information are collectively referred to as 'header information' for convenience of understanding and explanation.

The overall structure of the JPEG data is divided into respective blocks by the markers illustrated in FIG. 3. As shown in FIG. 3, the markers used in the JPE include: Restart (RST), Start Of Image (SOI), End Of Image (EOI), Start Of Frame (SOF), Define Huffman Tables (DHT), and SOS ( Start Of Scan, Define Quantization Tables (DQT), Define Restart Interval (DRI), and the like. Hereinafter, each marker will be described, and an identifier for each marker will be described based on what is currently commonly used. Thus, it is apparent that the identifier for each marker is not limited thereto and can be changed for convenience or need.

The RST marker is a marker inserted between a minimum coded unit (MCU) at a restart interval specified by the DRI marker, and an independent new MCU starts immediately after the RST marker. That is, when the JPEG decoder 120 decodes the MCU located after the RST marker, it does not refer to another MCU previously decoded. RST markers may begin with hFFD0 through hFFD7 and do not contain additional data.

The SOI marker is recorded at the beginning of the JPEG data, and is mainly used to confirm that it is JFIF (JPEG file interchange format, which means that the JPEG file structure is JFIF and is used in the same sense as JPEG). The SOI marker always starts with hFFD8 (where h is an identifier indicating that it is hexadecimal) and may further include data length information, identifier information, and the like including additional data length.

The EOI marker is recorded at the end of the JPEG file, indicating that it is the end of the original image data. The EOI marker always starts with hFFD9 (where h is an identifier indicating that it is hexadecimal) and generally no additional data is added.

The SOF marker is a block that holds information about the size and sampling of an image of a JPEG image file, and always starts with hFFC0 to hFFC2. As illustrated in FIG. 4, the SOF marker may include 2 byte data length information indicating additional data length information, 1 byte information indicating the number of sampling bits, and the like. The SOF marker may include component number (No. of components) information indicating information of the number of 1-byte Y, Cb, and Cr components.

DRI markers are blocks that define the spacing of RST markers and always start with hFFDD. The DRI marker may include additional data, wherein the interval of the RST marker is defined in MCU units. For example, when the value of the additional data included in the DRI marker is '100', 100 MCUs exist between the RST markers.

Here, the markers included in the bitstream of the JPEG file may not necessarily be stored in the same order. That is, the header information of the JPEG file starts with the SOI marker and defines the end with the EOI marker, and the order of the markers included in the SOI marker and the EOI marker may not be the same.

Referring back to FIG. 1, the data summing unit 110 receives an image data summing command and reads a plurality of corresponding individual image data from the storage 130. The image data summing command may be a signal generated from an input unit (not shown) or the like corresponding to a user's selection of a menu item or a button operation. That is, the input unit generates an image data summing command when a predetermined number of button manipulations are input in the matrix photographing mode (that is, a photographing mode in which a plurality of individual image data photographed continuously are combined into one image data). The data may be output to the adder 110. For example, when the number of video data to be summed is preset to n, the input unit generates an image data summing command when n button manipulations (for example, a 'shutter' button) are input to the data summing unit 110. You can output

The process of generating the image data by summing a plurality of individual image data by a conventional method is irrelevant to the present invention and will be apparent to those skilled in the art, and a detailed description thereof will be omitted.

On the contrary, when the DRI marker exists in the header information of all the individual image data, the data summing unit 110 reads the interval of the RST markers defined in the DRI marker of the header information of all the individual image data.

In addition, the data summing unit 110 compares the intervals (ie, values defined in the DRI markers) of the read plurality of RST markers. As a result of the comparison, when at least one or more values of the DRI markers defined in the header information of the plurality of individual image data are different from the rest, the data summing unit 110 transmits the plurality of individual image data to the JPEG codec unit 120. send. This is to generate one image data by summing a plurality of individual image data in a conventional method. The reason is the same as described above. That is, according to the JPEG standard, one image data may take only one value in defining the DRI marker.

On the contrary, when the intervals of the read RST markers are all the same, the data summing unit 110 generates the correction header information 630. The combined image data 500 illustrated in FIG. 5A is data obtained by horizontally adding the first image data 510 and the second image data 520. Here, the first image data 510 and the second image data 520 are JPEG data of the 'YUV422 2: 1' format, and the resolution is '320x240' (decimal) (horizontal size x vertical size, In the same order), the DRI marker is assumed to be defined as '14 (hexadecimal) '. The YUV422 2: 1 format refers to the case where one MCU has two Y (luminance), one U (blue), and one V (red) image data. Since the human eye is more sensitive to luminosity than chromaticity, the YUV422 2: 1 format is mainly used for compressing raw data into image data (JPEG data). At this time, one MCU has a resolution of 16x8. Therefore, when the DRI marker is defined as 14 (hexadecimal), the RST marker is inserted every '320x8' (decimal). That is, an RST marker is inserted for every 20 (decimal) MCUs.

Referring to FIG. 6, the SOF marker 600 of the first image data 510 includes '01 40 (hexadecimal) '620 corresponding to the vertical size '32 (decimal number)' 620 and the horizontal size '240 (10'). '00 F0 (hexadecimal) '610 corresponding to' decimal number 'exists for 2 bytes each. However, since the sum image data 500 is data obtained by horizontally summing the first image data 510 and the second image data 520, the resolution should be corrected to '640x240'.

Accordingly, the data summing unit 110 stores the header information of the first image data 510 in an arbitrary storage area (for example, a buffer, etc.), and then converts the resolution of '320x240' to the resolution of '640x240'. In order to correct, the information '00 F0 '610, which is information on the vertical size, may be modified, and the '01 40' 620 for the horizontal size may be modified to '02 80 '640 (however, 610 to 640). Is a hexadecimal number). The modified header information (hereinafter, referred to as 'modification header information') 630 is as illustrated in FIG. 6. That is, the SOF marker 630 of the modified header information 630 corresponds to '02 80 (hexadecimal number) '640 and the vertical size' 240 (decimal number) 'corresponding to the horizontal size' 640 (decimal number) '. '00 F0 (hexadecimal) '630 values exist for 2 bytes each. The data summing unit 110 may store the generated modified header information 630 in the storage 130 and / or any storage unit (eg, a buffer, etc.).

Herein, it is assumed that the DRI marker is defined as '20 (decimal) 'in the header information of the first image data 510. However, according to the Jpec standard, an interval value of the RST marker may be freely defined in the DRI marker. Therefore, it is obvious that the modified header information 630 can be generated at various resolutions. In addition, the corrected header information 630 is generated based on the first image data 510 (that is, image data located at the top left of the plurality of individual image data constituting the summing data 500). The same result can be obtained based on the header information. In addition, even when the first image data 510 and the second image data 520 are vertically summed (see FIG. 5B), the modified header information 630 may be generated by the above-described method. For example, in the above-described embodiment, the information about the horizontal size (01 40) 620 is not modified and corresponds to the information about the vertical size (00 F0) 610 (i.e., 480 (decimal)). Corresponding to '01 E0 '(hexadecimal)). In the above description, only the case of summing two image data is described, but in the case of summing two or more image data, the same result can be obtained by modifying the information about the horizontal size and / or the vertical size as described above. Self-explanatory For example, in the case of summing up the four image data (see FIG. 5C), the same result can be obtained by combining the case in which the two image data described above are horizontally summed and the vertical summation. In addition, it is apparent that the number and / or summation method (ie, horizontal and / or vertical summation) of the plurality of individual image data constituting the summed image data may be preset by the user.

Referring back to FIG. 1, the data summing unit 110 generates summed image data 500 to correspond to the corrected header information 630. Referring to FIG. 7, the first image data 510 may include the first header information 610, the first MCU group 710-1, the third MCU group 710-3,. , K-th MCU group 710-k, where k is an odd number (hereinafter, the same is the same), one or more RST markers 730, and an EOI marker 740. Also, the second image data 520 may include the second header information 620, the second MCU group 720-2, the fourth MCU group 720-4,. , M-th MCU group 720-m, where m is an even number (hereinafter, the same is the same), one or more RST markers 730, and an EOI marker 740. In this case, the first image data 510 indicates that the MCU group to which the odd (i.e., ord) k is added, and the second image data 520 includes the MCU group to which the even (m) ordinal is added, respectively. However, this is only for the convenience of understanding and explanation, but is not intended to limit the scope of the invention. That is, each image data includes a plurality of independent MCU groups. For example, the resolution of the first image data 510 and the second image data 520 is' 320x240 ', and the interval between the RST markers is defined as '20 (decimal)' in the DRI marker (YUV422 2: Assuming a case of one format), the first image data 510 and the second image data 520 include 30 (decimal) MCU groups (that is, n = 30).

Accordingly, the data summing unit 110 may use the modified header information 630, the k-th MCU group 710-k, the m-th MCU group 720-m, the plurality of RST markers 730, and the EOI markers 740. The aggregated image data 500 may be generated. That is, the data summing unit 110 sequentially copies the first MCU group 710-1 to the m-th MCU group 720-m, and sequentially adds the modified header information 630 to each other, and between the MCU groups. The RST marker 730 may be inserted, the m-th MCU group 720-m may be added, and the EOI marker 740 may be inserted to generate the summed image data 630.

In this case, it should be noted that the EOI marker 740 is inserted after the k-th MCU group in the first image data 510 but should be corrected by the RST marker 730 in the summed image data 630. That is, the data summing unit 110 may add the k-th MCU group and then modify and add the EOI marker 740 to the RST marker. In addition, according to the Jpeg standard, since the RST markers may be defined in the order of 'RST0' (FFDO) to 'RST7' (FFD7) (see FIG. 3), the data summing unit 110 may add up the RST markers. The information may be modified to correspond to the order in which the image data is located. That is, although the RST marker 730 inserted after the second MCU group 720-2 is defined as a 'FFD0' (ie, 'RST0') value in the second image data 520, the summed image data 630 is used. In the second MCU group 720-2 is a group of MCUs positioned second rather than the first group of MCUs, the second MCU group 720-2 may be defined as a 'FFD1' (ie, 'RST1') value. The data summing unit 110 may modify the information to correspond to the order in which other RST markers are located by the above-described method.

Referring back to FIG. 1, the data summing unit 110 may store the generated aggregated image data 500 in the storage unit 130 or transmit the generated sum image data 500 to a display unit (not shown).

Here, the data summing unit 110 described above has been described as a component in the image processing apparatus 100. However, according to an exemplary embodiment of the present invention, the data summing unit 110 may operate separately from other components of the image processing apparatus 100 (for example, the Jpec codec unit 120, etc.). Accordingly, it is apparent that the data summing unit 110 may be implemented as a multimedia processor that is separate from the image processing apparatus 100. That is, a device equipped with a multimedia processor according to an exemplary embodiment of the present invention may reconstruct a plurality of individual image data into one aggregated image data even without the J-CODEC coder 120.

The J-CODEC coder 120 includes a sampling unit 120-1, a discrete cosine transform unit 120-2, a quantization unit 120-3, an entropy coding unit 120-4, and a quantization table 120-5. And an entropy coding table 120-6, and the quantization unit 120-3 is combined with the quantization table 120-5 to perform a function, and the entropy coding unit 120-4 is an entropy coding table. It may be combined with (120-6) to perform a function. The JPEG codec unit 120 receives the compressed original image data or reads it from an arbitrary storage unit to perform entropy decoding, inverse quantization, and inverse discrete cosine transform to reconstruct the original image. In addition, raw data input through an image sensor (not shown) is compressed (encoded) into image data (ie, JPEG data) through a process such as quantization and entropy encoding. Since encoding the original data or decoding the encoded image data in the JPEG codec unit 120 is well known to those skilled in the art, a detailed description thereof will be omitted.

The storage unit 130 stores the image data. In particular, the sum image data 500 that is added by the data summing unit 110 is stored.

8 is a flowchart illustrating a method of summing a plurality of individual image data according to an exemplary embodiment of the present invention.

Referring to FIG. 8, when the data summing unit 110 receives an image data summing command (step 810), the data summing unit 110 reads a plurality of corresponding individual image data from the storage unit 130, and then header information of all individual image data. It is determined whether the DRI marker is defined in step 820. Here, the video data summing command may be a signal generated by an input unit (not shown) corresponding to the user's button manipulation, as described above.

As a result of determination, when the DRI marker is not defined in at least one or more of header information of all the individual image data, the data summing unit 110 generates a plurality of individual image data to generate the sum image data 500 by a conventional method. The image data is transmitted to the JPEG codec unit 120 (step 825). That is, the Jpec codec unit 120 decodes a plurality of individual image data received from the data summing unit 110 into raw data, sums them by a preset method, and then encodes them again to store the storage unit ( 130 may be transmitted to a display unit (not shown) for storing or displaying the same.

Here, in the case where the image data encoded by the method including the RST marker and the image data encoded by the method not including the RST marker are generated to generate one image data, the above-mentioned reason of the conventional method should be described above. As shown. Here, the process of generating the image data by summing a plurality of individual image data by a conventional method is not related to the present invention and will be apparent to those skilled in the art, and a detailed description thereof will be omitted.

On the contrary, when the DRI marker exists in the header information of all the individual image data, the data summing unit 110 reads the interval of the RST markers defined in the DRI marker of the header information of all the individual image data (step 830). ).

In operation 840, the data summing unit 110 compares the intervals (ie, values defined in the DRI markers) of the read plurality of RST markers.

As a result of the comparison, when at least one or more values of the DRI markers defined in the header information of the plurality of individual image data are different from the rest, the data summing unit 110 transmits the plurality of individual image data to the JPEG codec unit 120. Transmit (step 825). This is to generate one image data by summing a plurality of individual image data in a conventional method. The reason is the same as described above. That is, according to the JPEG standard, one image data may take only one value in defining the DRI marker.

However, as a result of the comparison, when the intervals of the read RST markers are all the same, the data summing unit 110 generates the correction header information 630 (step 850). Here, the sum image data 500 is data obtained by horizontally summing the first image data 510 and the second image data 520, and the first image data 510 and the second image data 520 are ' YUV422 2: 1 'format, which is JPEG data, resolution is' 320x240 '(decimal) (horizontal size x vertical size, in the same order), and DRI marker is defined as '14 (hexadecimal)' do. At this time, one MCU has a resolution of 16x8. Therefore, when the DRI marker is defined as 14 (hexadecimal), the RST marker is inserted every '320x8' (decimal). That is, an RST marker is inserted for every 20 (decimal) MCUs. In this case, the SOF marker 630 of the modified header information 630 corresponds to '02 80 (hexadecimal) '640 corresponding to the horizontal size' 640 (decimal) 'and 640' 240 (decimal) '. As described above, '00 F0 (hexadecimal) '630 may exist by 2 bytes. In addition, although not shown, the data summing unit 110 may store the generated modified header information 630 in the storage 130 and / or any storage unit (eg, a buffer, etc.).

In operation 860, the data adding unit 110 generates the aggregated image data 500 to correspond to the corrected header information 630. Here, the first image data 510 may include the first header information 610, the first MCU group 710-1, the third MCU group 710-3,. And a k-th MCU group 710-k, one or more RST markers 730, and an EOI marker 740, wherein the second image data 520 includes the second header information 620 and the second MCU group 720. -2), fourth MCU group 720-4,... , Assuming that the m-th MCU group 720-m, one or more RST markers 730, and an EOI marker 740 are included, the first image data 510 and the second image data 520 are 30 (10). Hexadecimal) MCU groups (ie n = 30). Accordingly, the data summing unit 110 may use the modified header information 630, the k-th MCU group 710-k, the m-th MCU group 720-m, the plurality of RST markers 730, and the EOI markers 740. The aggregated image data 500 may be generated. That is, the data summing unit 110 sequentially copies the first MCU group 710-1 to the m-th MCU group 720-m, and sequentially adds the modified header information 630 to each other, and between the MCU groups. The RST marker 730 may be inserted, the m-th MCU group 720-m may be added, and the EOI marker 740 may be inserted to generate the summed image data 630.

In this case, it should be noted that the EOI marker 740 is inserted after the k-th MCU group in the first image data 510 but should be corrected to the RST marker 730 in the summed image data 630. That is, the data summing unit 110 may add the k-th MCU group and then modify and add the EOI marker 740 to the RST marker. In addition, the data summing unit 110 may modify the information to correspond to the order in which the RST markers are located in the summed image data. Detailed description thereof has been described above (see FIG. 7), and detailed description thereof will be omitted herein.

In operation 870, the data summing unit 110 may store the generated aggregated image data 500 in the storage 130 or transmit the generated sum image data 500 to a display unit (not shown).

Herein, it is assumed that the DRI marker is defined as '20 (decimal) 'in the header information of the first image data 510. However, according to the Jpec standard, an interval value of the RST marker may be freely defined in the DRI marker. Therefore, it is obvious that the modified header information 630 can be generated at various resolutions. In addition, the corrected header information 630 is generated based on the first image data 510 (that is, image data located at the top left of the plurality of individual image data constituting the summing data 500). The same result can be obtained based on the header information. In addition, even when the first image data 510 and the second image data 520 are vertically summed (see FIG. 5B), the modified header information 630 may be generated by the above-described method. In the above description, only the case of summing two image data is described, but in the case of summing two or more image data, the same result can be obtained by modifying the information about the horizontal size and / or the vertical size as described above. Self-explanatory

In this case, the first image data 510 includes an MCU group to which an odd (i.e., k) ordinal number is added, and the second image data 520 includes an MCU group to which an even (m) ordinal number is added, respectively. Although shown as being added for convenience of understanding and explanation, it is not intended to limit the scope of the invention.

In addition, a recording medium may be provided that records a program for executing a plurality of individual image data summing methods according to an exemplary embodiment of the present invention described above in the image processing apparatus 100 and / or the multimedia processor. That is, by analyzing the header information of a plurality of individual image data corresponding to the data summing command to read the restart interval of the RST (Restart) marker defined in the DRI (Define Restart Interval) marker of each header information, A function of comparing intervals of the plurality of RST markers, generating correction header information corresponding to a preset summation method if the intervals of the plurality of RST markers are all the same, and adding image data corresponding to the correction header information. A recording medium may be provided in which a program including a function including a generating function is recorded.

As described above, according to the present invention, when summing separate image data into one image data, there is an effect that it is not necessary to secure a large amount of storage area.

In addition, according to the present invention, when the plurality of pieces of image data pre-stored in the storage area are summed into one image data, there is an effect of not having to decode each image data.

In addition, according to the present invention, when summing separate image data into one image data, it is not necessary to decode the image data into original data, thereby reducing the processing time.

In addition, according to the present invention, when the separate image data is summed into one image data, since the image data does not need to be decoded as the original data, even if the terminal does not have the CODEC code unit, the separate image data is converted into one image data. There is also an effect that can be added up.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications can be made and modifications can be made.

Claims (12)

When the image data summing command is received includes a data summing unit for generating a summed image data by summing a plurality of corresponding individual image data, The data summing unit corrects header information corresponding to a preset summation method when the restart intervals of the RST markers defined in the DRI markers of the header information of the plurality of individual image data are all the same. And generate summed image data corresponding to the corrected header information. The method of claim 1, Including the Jpec codec unit, The data summing unit analyzes header information of the plurality of pieces of individual image data, and when the DRI marker is not defined in at least one or more of header information of all of the pieces of individual image data, the plurality of pieces of individual image data is transferred to the Jpec codec unit. The image processing apparatus, characterized in that for transmitting. The method of claim 1, Including the Jpec codec unit, The data summing unit analyzes header information of the plurality of pieces of individual image data and selects the plurality of pieces of individual image data when at least one or more values of the DRI markers defined in the header information of the plurality of pieces of individual image data are different from others. And transmitting the data to the Jpec codec unit. The method according to claim 2 or 3, Including a storage unit, The CODEC codec decodes the plurality of individual image data received from the data summing unit into raw data, adds them by a preset method, and re-encodes the plurality of individual image data to be stored in the storage unit. Image processing device. The method of claim 1, The modified header information is an image processing apparatus, characterized in that for modifying the information on the vertical size and the horizontal size of the image included in any header information of the plurality of header information. In the plural individual video data summing method, The data summing unit analyzes the header information of the plurality of individual image data corresponding to the data summing command and reads the restart interval of the RST (Restart) marker defined in the DRI (Define Restart Interval) marker of each header information. ; Comparing the intervals of the plurality of RST markers by the data summing unit; Generating, by the data summing unit, modified header information corresponding to a preset summing method when the intervals of the plurality of RST markers are all the same; And And a step of generating, by the data summing unit, summed image data corresponding to the corrected header information. The method of claim 6, Reading a restart interval of an RST (Restart) marker defined in a DRI (Define Restart Interval) marker of each header information may include: Determining, by the data summing unit, whether the DRI marker is defined in header information of all of the plurality of individual image data; And And when the DRI marker is not defined in at least one or more of the header information of all the individual image data, the data summing unit transmitting the plurality of individual image data to the JPEG codec unit. How to add image data. The method of claim 6, Reading a restart interval of an RST (Restart) marker defined in a DRI (Define Restart Interval) marker of each header information may include: Analyzing, by the data summing unit, header information of the plurality of pieces of individual image data to read and compare the DRI markers defined in the header information of the plurality of pieces of individual image data; And And transmitting the plurality of individual image data to a JPEG codec unit when at least one or more of the DRI markers defined in the header information of the plurality of individual image data are different from the rest. And a plurality of individual image data summing methods. The method according to claim 7 or 8, Decoding each of the plurality of pieces of individual image data received from the data summing unit into raw data; Summing the decoded plurality of original data by a preset method; And And the J codec unit re-encodes the summed original data and stores the encoded original data in the storage unit. The method of claim 6, And the modified header information modifies information on a vertical size and a horizontal size of an image included in arbitrary header information among the plurality of header information. When the image data summing command is received includes a data summing unit for generating a summed image data by summing a plurality of corresponding individual image data, The data summing unit corrects header information corresponding to a preset summation method when the restart intervals of the RST markers defined in the DRI markers of the header information of the plurality of individual image data are all the same. And generating aggregated image data corresponding to the modified header information. A recording medium recording a plurality of individual image data summing programs in an image processing apparatus or a multimedia processor, Analyzing a header information of a plurality of pieces of individual image data corresponding to a data summing command and reading a restart interval of an RST (Restart) marker defined in a DRI (Define Restart Interval) marker of each header information; Comparing intervals of the plurality of RST markers; Generating modified header information corresponding to a preset summation method when all of the plurality of RST markers have the same interval; And And a program for generating summed image data corresponding to the corrected header information.

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