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CN101127819A - A method and device for image transmission - Google Patents

A method and device for image transmission Download PDF

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Publication number
CN101127819A
CN101127819A CNA2007101635115A CN200710163511A CN101127819A CN 101127819 A CN101127819 A CN 101127819A CN A2007101635115 A CNA2007101635115 A CN A2007101635115A CN 200710163511 A CN200710163511 A CN 200710163511A CN 101127819 A CN101127819 A CN 101127819A
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CN
China
Prior art keywords
template
image
receiving device
different information
information
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2007101635115A
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Chinese (zh)
Inventor
宋义震
马达
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou H3C Technologies Co Ltd
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Hangzhou H3C Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to CNA2007101635115A priority Critical patent/CN101127819A/en
Publication of CN101127819A publication Critical patent/CN101127819A/en
Pending legal-status Critical Current

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Abstract

The utility model discloses an image transmitting method, which is used to transmit images from a sender through a network, comprising the following steps: a sender equipment obtains a template relative to a plurality of images to be transmitted when the images to be transmitted are received; the sender equipment obtains the difference information between the images to be transmitted and the template; the sender equipment transmits the difference information and information of the template to a receiving end equipment. The utility model also provides a sender equipment and a receiving end equipment which realize the image transmitting method. The utility model avoids repeated transmission of the same part in a plurality of images and only transmits the different part during the image transmission, which decreases the occupation of the network bandwidth and increases the image transmission efficiency in the image transmission.

Description

A kind of method and apparatus of image transmission
Technical field
The present invention relates to networking technology area, relate in particular to a kind of method and apparatus of image transmission.
Background technology
At present, the bandwidth resources of wide area network are generally more in short supply, often need to promote the bandwidth availability ratio of WAN (WideAreaNetwork, wide area network) in the application of striding wide area network, and as far as possible with the maximum information of minimum bandwidth for transmission.Various WAN speed technologies are arisen at the historic moment, and wherein, data compression technique is one of common technology of WAN acceleration.
The compress technique of using in the existing transfer of data can be divided according to compressed object, comprises the compression at message, at the compression of data flow with at the compression of file.Or can be divided into methods such as duplicate contents compression, dictionary compression according to compression algorithm.At different contents special-purpose compression algorithm is arranged again, the compression algorithm of multiple standards is for example all arranged at voice, video and still image.In transmission during static images, general at present JPEG (a kind of graphics file format) compression algorithms that adopt are transmission again behind JPG (extension name of the JPEG graphic file) file with picture compression waiting for transmission more.
Need to transmit the similar image file of great amount of images content in some cases, for example in the ticket management system that financial industry is often used, need scan image file to a large amount of bills, be transferred to general headquarters or data center by wide area network then and examine or put on record.Its transfer process may further comprise the steps as shown in Figure 1:
Step s101, will need the image transmitted file to compress at sending ending equipment.
Step s102, the image file after will compressing send to receiving device.
Step s103, receiving device obtain image file by decompression.
According to above-mentioned existing method, the image file after the compression is still bigger, the general about 200Kbytes~800Kbytes of bill scanning document compression back size.Because at present the bandwidth of wide area network is relatively low, so the speed during the bulk transfer image file is very slow, and what need is chronic, and can other network application be impacted.The image major part of transmission over networks was compressed simultaneously, utilized the existing data compression technology that view data is compressed again and did not also have positive effect.And after overcompression, also be difficult in the file content of similar image find similar data block, utilize file or data-block cache technology that the image of this compression is transmitted the acceleration effect that also can not obtain.
Summary of the invention
The invention provides a kind of image transfer method and equipment,, improve the image efficiency of transmission to reduce in the image transmission course to the taking of the network bandwidth.
For achieving the above object, the invention provides a kind of image transfer method, be applied to image be transmitted by network at transmitting terminal, may further comprise the steps:
When sending ending equipment receives image waiting for transmission, obtain and the relevant template of described image to be transmitted;
Described sending ending equipment obtains the different information of described image to be transmitted and described template;
Described sending ending equipment sends the information of described different information with described template to receiving device.
Wherein, described transmitting terminal also comprises before receiving the step of image waiting for transmission:
On described sending ending equipment and described receiving device, identical template is set.
Wherein, the described method that identical template is set on sending ending equipment and receiving device comprises:
Carrying out the manual of template on described sending ending equipment and receiving device sets; Or
Described sending ending equipment and receiving device are concluded automatically and are obtained template according to the similitude between the image that has sent.
Wherein, the described sending ending equipment step of obtaining the different information of described image to be transmitted and described template is specially:
Described sending ending equipment carries out preliminary treatment to described image to be transmitted, makes the size and the position of template of described image to be transmitted and described selection corresponding;
More described pretreated image to be transmitted of described sending ending equipment and the template of storing in advance, the template of acquisition and described pretreated image similarity to be transmitted is as the correlate template of described image to be transmitted; Or in the manual template of setting storage in advance a template as the correlate template of described image to be transmitted.
Wherein, described sending ending equipment is specially the information of described different information with described template to the step that receiving device sends:
Described sending ending equipment compresses described different information;
The different information of described sending ending equipment after with described compression, and the title of described template or sign send to receiving device.
The present invention also provides a kind of image transfer method, is applied at receiving terminal the image by Network Transmission be reduced, and may further comprise the steps:
Receiving device receives the different information of sending ending equipment transmission and the information of template;
Described receiving device obtains image according to the information of described different information and template.
Wherein, the described receiving device information that receives the template that sending ending equipment sends is specially: the title of template or sign.
Wherein, described receiving device is specially according to the step of the information reverting image of described different information and template:
When described different information is compressed different information, the described receiving device described different information that decompresses;
Described receiving device obtains template according to the information of described template;
Different information and the described template of described receiving device after according to described decompression, the synthetic original image of going back.
The present invention also provides a kind of sending ending equipment of realizing described image transfer method, is used for it is characterized in that to the receiving device images, comprising:
Image acquisition unit is used to obtain image waiting for transmission;
Template selection unit is used for the image waiting for transmission that obtains according to described image acquisition unit, selects and the relevant template of described image to be transmitted;
The difference acquiring unit is used to obtain the different information between the correlate template that image waiting for transmission that described image acquisition unit obtains and described template selection unit select;
Transmitting element is used for the different information that correlate template information that described template selection unit is selected and described difference acquiring unit obtain and sends to described receiving device.
Wherein, also comprise:
The transmitting terminal template is provided with the unit, is used to store the template that sets in advance and offers described template selection unit, and the template of storing on described template and the described receiving device is identical.
Wherein, also comprise:
Compression unit is used to compress the different information that described difference acquiring unit gets access to, and sends to transmitting element and be used for sending to described receiving device.
The present invention also provides a kind of receiving device of realizing described image transfer method, is used for the image that receiving end/sending end equipment sends and reduces, and it is characterized in that, comprising:
Receiving element is used to receive the different information of described sending ending equipment transmission and the information of template;
The image restoring unit is used for according to the described different information of described receiving element reception and the information reverting image of template.
Wherein, described image restoring unit further comprises:
Template is obtained subelement, is used for obtaining template according to the information of described template;
The synthon unit is used for the different information that obtains according to described receiving element, and described template is obtained the template that subelement obtains, the synthetic original image of going back.
Wherein, also comprise:
The receiving terminal template is provided with the unit, is used to store the template that sets in advance and offers described image restoring unit be used for obtaining of template, and the template of storing on described template and the described transmitting apparatus is identical.
Wherein, also comprise:
Decompression unit, when being used for different information that described receiving element receives and being compressed different information, the different information after the described compression that decompresses also offers described image restoring unit.
Compared with prior art, the present invention has the following advantages:
Identical part repeats to transmit and the difference part of transmission only in avoiding a plurality of images in carrying out the process of image transmission, reduces in the image transmission course the taking of the network bandwidth, and improves the image efficiency of transmission.And image does not change at the form and the form of the output of the input of sending ending equipment and receiving device, needn't change existing image input, output and memory device in the existing system.
Description of drawings
Fig. 1 is the flow chart of image transfer method in the prior art;
Fig. 2 is the flow chart of image transfer method when among the present invention the sending ending equipment side being described;
Fig. 3 is the flow chart of image transfer method when among the present invention the receiving terminal equipment side being described;
Fig. 4 is a kind of sending ending equipment of image transmission and structural representation of receiving device of being used among the present invention.
Embodiment
Core concept among the present invention is, in the process of carrying out the image transmission, in advance image to be transmitted and template are compared at sending ending equipment, only different information and the Template Information of image to be transmitted with template sent to receiving device according to comparative result, thereby avoided the same section in a plurality of images is repeated transmission, and only transmitted different parts.Receiving device can get access to original image information by synthesizing according to the different information and the Template Information that receive.In addition, different information can also send to receiving terminal after compressing when sending again, thus further conserve network bandwidth resource.
In the implementation procedure of said method, need be provided with template in advance at sending ending equipment and receiving device, make sending ending equipment and receiving device have identical some templates, these templates can be distinguished by modes such as numbering or titles.This method that template is set can comprise: (1) is manual on sending ending equipment and receiving device to be set template, for example: can be according to the characteristics of image file to be sent, the manual in advance representative some templates that may use in the process of transmitting of setting; (2) sending ending equipment is concluded automatically and is obtained template according to the similitude between the image that has sent.For example: sending ending equipment is after sending some image files, and the common ground of summarizing these image files that sent is as a new template; Employed different images during according to conclusion can obtain different templates.
Below in conjunction with specific embodiment, be described from sending ending equipment and receiving device execution mode respectively a kind of image transfer method the present invention, be that the scan image of bill is an example wherein with image to be sent.The characteristics of bill scan image are, most of zone of each image file all is identical, different zone only is on the bill manually or machine is beaten numeral and different stamped signatures etc.
For the sending ending equipment side, a kind of image transfer method of the present invention may further comprise the steps as shown in Figure 2:
Step s201, input picture.
Concrete, sending ending equipment can obtain the bill scan image from scanner, and this image also can be image file compression or uncompressed.
Step s202, selection template.
Concrete, sending ending equipment compares input picture that obtains and the template that sets in advance by image recognition technology, obtains the correlate template of a template of difference minimum as this image.With the bill is example, and the method to set up of template is: can be with after the blank bill scanning, and craft specifies the scan image of blank bill as template, and obtains different templates according to different bill kinds; Or can obtain template by automatic conclusion of sending ending equipment, thereby obtain different templates according to the congener bill that has sent according to different bill kinds.No matter adopt which kind of method, can set in advance template, use when sending for image.
Step s203, calibration chart picture.
Concrete, utilize image recognition and treatment technology that the image of input is carried out cutting edge and rotation adjustment, make it corresponding, base map position, size and angle unanimity with selected template.
Step s204, calculating difference.
Concrete, will image transmitted and template contrast, carry out Difference Calculation, when the color in a certain coordinate pixel or zone and monochrome information difference greater than a certain thresholding, promptly the information of decidable and template is different.By this Difference Calculation and combining image treatment technology, can obtain a secondary difference image, difference image has only write down the different information that is transmitted the different pixels between image and template.
Step s205, compressed differential image.
Concrete, utilize special use or general compression method that the image that obtains among the step s204 is compressed, for example can utilize the JPEG compression algorithm, also can utilize other image compression or data compression technique.
Step s206, transmission image.
Concrete, the difference image after the compression and Template Information (as the numbering of template or title etc.) are sent to receiving device together, only need transmit for image template here and number or Template Informations such as title, do not need to transmit content.Also can use the WAN speed technology to improve transmission speed in the image transmission course.
For the receiving device side, a kind of image transfer method of the present invention may further comprise the steps as shown in Figure 3:
Step s301, reception image.
Concrete, receiving device is received difference image and the Template Information (numbering of template or title etc.) that transmitting terminal transmits.
Step s302, decompressing image.
Concrete, the difference image information after the decompression method that compression is complementary among utilization and the step s205 obtains decompressing.
Step s303, matching template.
Concrete, utilize Template Informations such as template numbering or title to obtain corresponding template, and difference image and template are carried out the coordinate adjustment.
Step s304, the synthetic original image of going back.
Concrete, utilize image processing techniques that the information of difference image and template image is synthetic again, obtain and the original identical or very akin image of image that is sent out.The Difference Calculation method of synthetic method in step s204 is reversible process.
Step s305, compressed image.
Concrete, for the ease of storage and follow-up checking, utilize special use or general compression method that image is compressed, can utilize the JPEG compression algorithm, also can utilize other image compression or data compression technique.
Step s306, preservation image.
Concrete, picture is saved in the storage medium, the entire image transmission course finishes.In the bill scan transfer of present embodiment was used, storage was normally in order to put on record and post review.
Above embodiment is an example with the scan image of bill just, the execution mode of image transfer method among the present invention has been described, but at the scan image that is not limited to bill in actual applications, for other static image file, embodiment is similar to above-mentioned flow process, is not repeated in this description at this.
By the image transfer method that uses the foregoing description to provide, identical part repeats to transmit and only transmits different parts in avoiding a plurality of images in carrying out the process of image transmission, reduce in the image transmission course the taking of the network bandwidth, improve the image efficiency of transmission.And image does not change at the form and the form of the output of the input of sending ending equipment and receiving device, and transmission course is transparent to existing system, therefore can accomplish compatibility with existing equipment, needn't change existing image input, output and memory device.
The present invention also provides a kind of sending ending equipment and receiving device, wherein, sending ending equipment is used for getting access to when needing image transmitted, obtain the template relevant with this image, and obtain the different information of image to be sent and this template, at last different information and Template Information are sent to receiving device together.Receiving device is used for carrying out image restoring according to the different information and the Template Information that receive.Concrete, the structure of sending ending equipment and receiving device is as shown in Figure 4.
Sending ending equipment 10 further comprises:
Image acquisition unit 11 is used to obtain image waiting for transmission.
Template selection unit 12 is used for the image waiting for transmission that obtains according to image acquisition unit 11, selects the template relevant with this image to be transmitted.
Difference acquiring unit 13 is used to obtain the different information between the correlate template that image waiting for transmission that image acquisition unit 11 obtains and template selection unit 12 select.
Compression unit 14 is used for handling the back when sending the different information that difference acquiring unit 13 obtains need being compressed, and re-sends to transmitting element 15 after the different information that difference acquiring unit 13 is got access to compresses and sends.
Transmitting element 15 is used for the different information that correlate template information that template selection unit 12 is selected and difference acquiring unit 13 obtain and sends to receiving device 20, and this different information also can be through the different information after compression unit 14 compressions.
The transmitting terminal template is provided with unit 16, is used to store the template that sets in advance and offers the selection that template selection unit 12 is used for correlate template, and the template of storing on the template of this unit storage and the receiving device 20 is identical.
Receiving device 20 further comprises:
Receiving element 21 is used for the different information of receiving end/sending end equipment 10 transmissions and the information of template;
Image restoring unit 22 is used for according to the different information of receiving element 21 receptions and the information reverting image of template.This unit further comprises: template is obtained subelement 221, is used for obtaining template corresponding according to the information of the template that receives; Synthon unit 222 is used for obtaining the template that subelement 221 obtains according to different information and template that receiving element 21 receives, reduces corresponding image.
The receiving terminal template is provided with unit 23, is used to store the template that sets in advance and offers image restoring unit 22 that to be used for image synthetic, and the template of storing on the template of this unit storage and the transmitting apparatus 10 is identical.
Decompression unit 24, when the different information that is used for receiving when receiving element 21 was compressed different information, the different information after this compression that decompresses also offered image restoring unit 22, and the reduction that is used to carry out image is synthetic.
By sending ending equipment and the receiving device that uses the foregoing description to provide, identical part repeats to transmit and only transmits different parts in avoiding a plurality of images in carrying out the process of image transmission, reduce in the image transmission course the taking of the network bandwidth, improve the image efficiency of transmission.And image does not change at the form and the form of the output of the input of sending ending equipment and receiving device, and transmission course is transparent to existing system, needn't change existing image input, output and memory device.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, or realizes with the form of software product merely.Any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims (15)

1. an image transfer method is applied at transmitting terminal image be transmitted by network, it is characterized in that, may further comprise the steps:
When sending ending equipment receives image waiting for transmission, obtain and the relevant template of described image to be transmitted;
Described sending ending equipment obtains the different information of described image to be transmitted and described template;
Described sending ending equipment sends the information of described different information with described template to receiving device.
2. image transfer method according to claim 1 is characterized in that, described transmitting terminal also comprises before receiving the step of image waiting for transmission:
On described sending ending equipment and described receiving device, identical template is set.
3. as image transfer method as described in the claim 2, it is characterized in that the described method that identical template is set comprises on sending ending equipment and receiving device:
Carrying out the manual of template on described sending ending equipment and receiving device sets; Or
Described sending ending equipment and receiving device are concluded automatically and are obtained template according to the similitude between the image that has sent.
4. image transfer method according to claim 1 is characterized in that the step that described sending ending equipment obtains the different information of described image to be transmitted and described template is specially:
Described sending ending equipment carries out preliminary treatment to described image to be transmitted, makes the size and the position of template of described image to be transmitted and described selection corresponding;
The more described pretreated image to be transmitted of described sending ending equipment and the template of storage in advance obtain the correlate template of described image to be transmitted; Or in the manual template of setting storage in advance a template as the correlate template of described image to be transmitted.
5. image transfer method according to claim 1 is characterized in that, described sending ending equipment is specially the information of described different information with described template to the step that receiving device sends:
Described sending ending equipment compresses described different information;
The different information of described sending ending equipment after with described compression, and the title of described template or sign send to receiving device.
6. an image transfer method is applied at receiving terminal the image by Network Transmission be reduced, and it is characterized in that, may further comprise the steps:
Receiving device receives the different information of sending ending equipment transmission and the information of template;
Described receiving device is according to the information reverting image of described different information and template.
7. as image transfer method as described in the claim 6, it is characterized in that the information that described receiving device receives the template that sending ending equipment sends is specially: the title of template or sign.
8. as image transfer method as described in the claim 7, it is characterized in that described receiving device is specially according to the step of the information reverting image of described different information and template:
When described different information is compressed different information, the described receiving device described different information that decompresses;
Described receiving device obtains template according to the information of described template;
Different information and the described template of described receiving device after according to described decompression, the synthetic original image of going back.
9. realize the sending ending equipment of image transfer method according to claim 1 for one kind, be used for it is characterized in that, comprising to the receiving device images:
Image acquisition unit is used to obtain image waiting for transmission;
Template selection unit is used for the image waiting for transmission that obtains according to described image acquisition unit, selects and the relevant template of described image to be transmitted;
The difference acquiring unit is used to obtain the different information between the correlate template that image waiting for transmission that described image acquisition unit obtains and described template selection unit select;
Transmitting element is used for the different information that correlate template information that described template selection unit is selected and described difference acquiring unit obtain and sends to described receiving device.
10. as sending ending equipment as described in the claim 9, it is characterized in that, also comprise:
The transmitting terminal template is provided with the unit, is used to store the template that sets in advance and offers described template selection unit, and the template of storing on described template and the described receiving device is identical.
11. as sending ending equipment as described in the claim 9, it is characterized in that, also comprise:
Compression unit is used to compress the different information that described difference acquiring unit gets access to, and sends to transmitting element and be used for sending to described receiving device.
12. a realization, is used for the image that receiving end/sending end equipment sends as the receiving device of image transfer method as described in the claim 6 and reduces, and it is characterized in that, comprising:
Receiving element is used to receive the different information of described sending ending equipment transmission and the information of template;
The image restoring unit is used for according to the described different information of described receiving element reception and the information reverting image of template.
13., it is characterized in that described image restoring unit further comprises as receiving device as described in the claim 12:
Template is obtained subelement, is used for obtaining template according to the information of described template;
The synthon unit is used for the different information that obtains according to described receiving element, and described template is obtained the template that subelement obtains, the synthetic original image of going back.
14. as receiving device as described in the claim 12, it is characterized in that, also comprise:
The receiving terminal template is provided with the unit, is used to store the template that sets in advance and offers described image restoring unit be used for obtaining of template, and the template of storing on described template and the described transmitting apparatus is identical.
15. as receiving device as described in the claim 12, it is characterized in that, also comprise:
Decompression unit, when being used for different information that described receiving element receives and being compressed different information, the different information after the described compression that decompresses also offers described image restoring unit.
CNA2007101635115A 2007-10-12 2007-10-12 A method and device for image transmission Pending CN101127819A (en)

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US11128835B2 (en) 2017-10-20 2021-09-21 Hangzhou Hikvision Digital Technology Co., Ltd Data transmission method, camera and electronic device
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CN112529028A (en) * 2019-09-19 2021-03-19 北京声迅电子股份有限公司 Networking access method and device for security check machine image
CN112529028B (en) * 2019-09-19 2022-12-02 北京声迅电子股份有限公司 Networking access method and device for security check machine image
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