CN102708557A - Image mosaic method and system for two-sided scanning - Google Patents
Image mosaic method and system for two-sided scanning Download PDFInfo
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- CN102708557A CN102708557A CN2012101518080A CN201210151808A CN102708557A CN 102708557 A CN102708557 A CN 102708557A CN 2012101518080 A CN2012101518080 A CN 2012101518080A CN 201210151808 A CN201210151808 A CN 201210151808A CN 102708557 A CN102708557 A CN 102708557A
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Abstract
The invention discloses an image mosaic method and a system for two-sided scanning. A feature database of scan files is built before the image mosaic method is applied. The image mosaic method includes obtaining scan images of scan files, wherein the scan images comprise front images and back images of the scan files; performing slant correction on the scan images; performing position segmentation and feature extraction on the scan images; performing direction judgment and direction correction on the scan images according to comparison of features of the extracted scan images with the feature data; and mosaicing the front images with the back images in the scan images. According to the image mosaic method and the system, two-sided scan operation of users is greatly facilitated, mosaic quality of the two-sided scan images is guaranteed, and the image mosaic method and the system can be widely applied to the image scan field.
Description
Technical field
The present invention relates to image split-joint method, especially a kind of image split-joint method and system that is used for duplex scanning.
Background technology
The scanner master carries out image pickup based on the optoelectronic induction principle, is used for converting the content of Hard copy file to e-file through the mode that scans, so that the user propagates, puts in order or preserves.The plain scan appearance all is to adopt an imageing sensor to carry out single-sweep.But, all need carry out duplex scanning and preserve or use to keep on file to it for securities data such as I.D., bills.For example, when handling bank business, often need the duplex scanning spare of I.D..Generally speaking, pros and cons need scan twice, and needs scanning on a piece of paper.The problem that often occurs is that the pros and cons image can not be stitched together, and puts upside down dislocation, makes troubles to application; Perhaps the image of pros and cons is accomplished in scanning, through image processing software, manually accomplishes the adjustment and the splicing of image then, makes troubles to application.Even the application Double face scanner, mistake such as prevent image inclination, position mirror image in the time of also need guaranteeing the pros and cons image mosaic or put upside down does not also have to accomplish automatically the scan image correlation method of splicing automatically at present.
Summary of the invention
The technical matters that the present invention will solve is: a kind of image split-joint method that is used for duplex scanning is provided.
Another technical matters that the present invention will solve is: a kind of image mosaic system that is used for duplex scanning is provided.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopted is:
A kind of image split-joint method that is used for duplex scanning before using said image split-joint method, is set up the property data base of scanning document earlier, and said image split-joint method may further comprise the steps:
Obtain the scan image of scanning document, said scan image comprises the direct picture and the reverse side image of scanning document;
Scan image is carried out slant correction;
Scan image is positioned cutting and feature extraction;
According to the characteristic and the property data base comparison of the scan image that extracts, scan image is carried out the orientation judge and directional correction;
Direct picture in the scan image and reverse side image are spliced.
Further as preferred embodiment, the said step that scan image is positioned cutting and feature extraction comprises:
The framing of scan image is used to detect the efficiency frontier of scan image, from scan image, cuts out effective document image;
Feature extraction utilizes horizontal projection and the vertical projection location, effective coverage to scan image, extracts the characteristic of scan image.
Further as preferred embodiment, saidly scan image is carried out the orientation is judged and directional correction comprises: the judgement of pros and cons, upper-lower position and mirror position and correction.
Further, the position of the character image distributed areas that are characterized as scanning document of said scan image and said character image distributed areas.
Further as preferred embodiment, the said step that direct picture in the scan image and reverse side image are spliced is specially: with the reverse side image mosaic in the scan image under direct picture or just right-hand.
A kind of image mosaic system that is used for duplex scanning comprises:
The characteristic library unit is used to extract and preserve the characteristic of the scan image of scanning document, sets up the property data base of scanning document;
Image acquisition unit is used to obtain the scan image of scanning document, and said scan image comprises the direct picture and the reverse side image of scanning document;
The slant correction unit is used for scan image is carried out slant correction;
Location cutting and feature extraction unit are used for scan image is positioned cutting and feature extraction;
The orientation is judged and the directional correction unit, is used for cutting and the characteristic of the scan image that feature extraction unit is extracted and the property data base comparison of characteristic library unit according to the location, scan image is carried out the orientation judge and directional correction;
Concatenation unit is used for the direct picture and the reverse side image of scan image are spliced.
Further as preferred embodiment, cutting of said location and feature extraction unit comprise:
The framing module is used to detect the efficiency frontier of scan image, from scan image, cuts out effective document image;
Characteristic extracting module is utilized horizontal projection and the vertical projection location, effective coverage to scan image, extracts the characteristic of scan image.
Further, said orientation judgement and directional correction unit comprise the judgement and the correction of pros and cons, upper-lower position and mirror position to scan image.
Further, the position of the character image distributed areas that are characterized as scanning document of said scan image and said character image distributed areas.
Further as preferred embodiment, said concatenation unit is perhaps just right-hand under direct picture with the reverse side image mosaic in the scan image.
The invention has the beneficial effects as follows: the present invention is used for the image split-joint method of duplex scanning; Through setting up the property data base of scanning document; Scan image is carried out slant correction, locatees the feature extraction of cutting with scan image; And according to the characteristic combination property data base that extracts scan image is carried out the orientation and judge and directional correction; With the direct picture of realization scan image and the automatic splicing of reverse side image, greatly facilitate client's duplex scanning operation, and guaranteed the joining quality of duplex scanning image.
Another beneficial effect of the present invention is: the present invention is used for the image mosaic system of duplex scanning; Through setting up the property data base of scanning document; Scan image is carried out slant correction, locatees the feature extraction of cutting with scan image; And according to the characteristic combination property data base that extracts scan image is carried out the orientation and judge and directional correction; With the direct picture of realization scan image and the automatic splicing of reverse side image, greatly facilitate client's duplex scanning operation, and guaranteed the joining quality of duplex scanning image.
Description of drawings
Fig. 1 is the flow chart of steps that the present invention is used for the image split-joint method of duplex scanning;
Fig. 2 is the flow chart of steps that the present invention is used for the image split-joint method property data base foundation of duplex scanning;
Fig. 3 is the characteristic diagram of I.D. direct picture among the embodiment;
Fig. 4 is the positive actual effect synoptic diagram of I.D. among the embodiment;
Fig. 5 is the characteristic diagram of I.D. reverse side image among the embodiment;
Fig. 6 is that the characteristic that spins upside down of I.D. direct picture illustrates among the embodiment;
Fig. 7 is the flip horizontal characteristic diagram of I.D. direct picture among the embodiment;
Fig. 8 is the functional-block diagram that the present invention is used for the image mosaic system of duplex scanning.
Embodiment
Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:
A kind of image split-joint method that is used for duplex scanning before using said image split-joint method, is set up the property data base of scanning document earlier.The property data base of said scanning document is the foundation of judging whether the pros and cons of scanning document, image are put upside down up and down, reaching the left and right sides mirror image orientation of image.
With reference to Fig. 2, the foundation step of the property data base of scanning document of the present invention is following:
Obtain the scan image of scanning document, can obtain the dual-side image of scanning document, also can obtain the dual-side image of scanning document through the scan operation successively of single-sweep appearance through the imageing sensor of Double face scanner;
Extract the characteristic of the scan image of scanning document, the said position that is characterized as character image distributed areas and character image distributed areas on the paper sample;
Characteristic according to extracting is set up property data base, and said property data base comprises pros and cons characteristic, mirror image characteristic and the inverted image characteristic of scanning document.
Be example with the I.D. below, the foundation of property data base is described.With reference to Fig. 3, black region is represented character area or image-region among Fig. 3, and Fig. 4 is the positive actual effect synoptic diagram of I.D., and the characteristic of the direct picture of visual scan image distributes corresponding with actual character image.In like manner, can set up the characteristic of reverse side image, Fig. 5 is the characteristic diagram of the reverse side image of I.D. scan image.Can find out that from above-mentioned characteristic diagram the characteristic diagram of pros and cons image is obviously different.From the characteristic diagram of direct picture and reverse side image, the characteristic that can be easy to spun upside down accordingly with flip horizontal illustrates.Fig. 6 is that the characteristic that spins upside down of I.D. direct picture illustrates, and Fig. 7 is the flip horizontal characteristic diagram of I.D. direct picture.Certainly, it will be understood by those skilled in the art that indication scanning document of the present invention is not limited to I.D., also can be securities files such as check, bill.
With reference to Fig. 1, the image split-joint method of duplex scanning of the present invention may further comprise the steps:
Obtain the scan image of scanning document; Said scan image comprises the direct picture and the reverse side image of scanning document; Two of Double face scanner capable of using imageing sensors obtain the direct picture and the reverse side image of scanning document simultaneously here, also can scan direct picture and the reverse side image that obtains scanning document one by one through the plain scan appearance;
Scan image is carried out slant correction, the image-region of scanning document is carried out the Hough conversion, obtain the two days parallel lines up and down in the image; Can confirm the level angle of scanning document by the slope of straight line; According to level angle, image is rotated, reach the purpose of image rectification;
Scan image is positioned cutting and feature extraction;
According to the characteristic and the property data base comparison of the scan image that extracts, scan image is carried out the orientation judge and directional correction;
Direct picture in the scan image and reverse side image are spliced.
Preferably, said scan image is positioned cutting and the step of feature extraction comprises:
The framing of scan image utilizes the susan algorithm to detect the efficiency frontier of scan image, from scan image, cuts out effective document image;
Feature extraction utilizes horizontal projection and the vertical projection location, effective coverage to scan image, extracts the characteristic of scan image.
Saidly scan image is carried out the orientation is judged and directional correction comprises: the judgement of pros and cons, upper-lower position and mirror position and correction.According to the characteristic of the scan image that extracts, compare with the pros and cons characteristic in the property data base, the pro and con of scan image is judged; In like manner, can compare, judge whether the upper-lower position of view data is put upside down, if then image is spun upside down to the characteristic of scan image and the inverted image characteristic in the property data base; The characteristic of scan image and the mirror image characteristic in the property data base are compared, judge whether the position, the left and right sides of view data puts upside down, if then image is carried out flip horizontal.So just avoided in the traditional duplex scanning process, the pros and cons image can not be stitched together, and puts upside down the defective that dislocation is made troubles to application.
Further as preferred embodiment, the said step that direct picture in the scan image and reverse side image are spliced is specially: with the reverse side image mosaic in the scan image under direct picture or just right-hand.The inventive method has realized the splicing of the direct picture and the reverse side image of scan image automatically, and avoided image inclination, position, the left and right sides and upper-lower position put upside down dislocation.
A kind of image mosaic system that is used for duplex scanning comprises:
Location cutting and feature extraction unit 40 are used for scan image is positioned cutting and feature extraction;
The orientation is judged and directional correction unit 50, is used for cutting and the characteristic of the scan image that feature extraction unit 40 is extracted and the property data base comparison of characteristic library unit 10 according to the location, scan image is carried out the orientation judge and directional correction;
Further as preferred embodiment, cutting of said location and feature extraction unit 40 comprise:
Framing module 41 utilizes the susan algorithm to detect the efficiency frontier of scan image, from scan image, cuts out effective document image;
Characteristic extracting module 42 is utilized horizontal projection and the vertical projection location, effective coverage to scan image, extracts the characteristic of scan image.
Further; Judgement of said orientation and directional correction unit 50 comprise the judgement and the correction of pros and cons, upper-lower position and mirror position to scan image; Be specially: according to the characteristic of the scan image that extracts; Compare with the pros and cons characteristic in the property data base, the pro and con of scan image is judged; In like manner, can compare, judge whether the upper-lower position of view data is put upside down, if then image is spun upside down to the characteristic of scan image and the inverted image characteristic in the property data base; The characteristic of scan image and the mirror image characteristic in the property data base are compared, judge whether the position, the left and right sides of view data puts upside down, if then image is carried out flip horizontal.
Further as preferred embodiment, said concatenation unit is perhaps just right-hand under direct picture with the reverse side image mosaic in the scan image.
The present invention is used for the image mosaic system of duplex scanning; The characteristic of the scan image through extracting scanning document; And compare with the property data base of setting up good scanning document; Judge scan image is carried out pros and cons, the judgement and the correction of the judgement of upper-lower position and correction, mirror position, with the automatic splicing of the dual-side image of having realized scanning document.
More than be that preferable enforcement of the present invention is specified; But the invention is not limited to said embodiment; Those of ordinary skill in the art can also make all equivalent variations or replacement under the prerequisite of spirit of the present invention, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (10)
1. an image split-joint method that is used for duplex scanning is characterized in that, before using said image split-joint method, sets up the property data base of scanning document earlier, and said image split-joint method may further comprise the steps:
Obtain the scan image of scanning document, said scan image comprises the direct picture and the reverse side image of scanning document;
Scan image is carried out slant correction;
Scan image is positioned cutting and feature extraction;
According to the characteristic and the property data base comparison of the scan image that extracts, scan image is carried out the orientation judge and directional correction;
Direct picture in the scan image and reverse side image are spliced.
2. a kind of image split-joint method that is used for duplex scanning according to claim 1 is characterized in that: said scan image is positioned cutting and the step of feature extraction comprises:
The framing of scan image is used to detect the efficiency frontier of scan image, from scan image, cuts out effective document image;
Feature extraction utilizes horizontal projection and the vertical projection location, effective coverage to scan image, extracts the characteristic of scan image.
3. a kind of image split-joint method that is used for duplex scanning according to claim 1 is characterized in that, saidly scan image is carried out the orientation is judged and directional correction comprises: the judgement of pros and cons, upper-lower position and mirror position and correction.
4. a kind of image split-joint method that is used for duplex scanning according to claim 1 is characterized in that, the character image distributed areas that are characterized as scanning document of said scan image and the position of said character image distributed areas.
5. a kind of image split-joint method that is used for duplex scanning according to claim 1; It is characterized in that the said step that direct picture in the scan image and reverse side image are spliced is specially: with the reverse side image mosaic in the scan image under direct picture or just right-hand.
6. an image mosaic system that is used for duplex scanning is characterized in that, comprising:
The characteristic library unit is used to extract and preserve the characteristic of the scan image of scanning document, sets up the property data base of scanning document;
Image acquisition unit is used to obtain the scan image of scanning document, and said scan image comprises the direct picture and the reverse side image of scanning document;
The slant correction unit is used for scan image is carried out slant correction;
Location cutting and feature extraction unit are used for scan image is positioned cutting and feature extraction;
The orientation is judged and the directional correction unit, is used for cutting and the characteristic of the scan image that feature extraction unit is extracted and the property data base comparison of characteristic library unit according to the location, scan image is carried out the orientation judge and directional correction;
Concatenation unit is used for the direct picture and the reverse side image of scan image are spliced.
7. a kind of image mosaic system that is used for duplex scanning according to claim 6 is characterized in that, cutting of said location and feature extraction unit comprise:
The framing module is used to detect the efficiency frontier of scan image, from scan image, cuts out effective document image;
Characteristic extracting module is utilized horizontal projection and the vertical projection location, effective coverage to scan image, extracts the characteristic of scan image.
8. a kind of image mosaic system that is used for duplex scanning according to claim 6 is characterized in that, judgement of said orientation and directional correction unit comprise the judgement and the correction of pros and cons, upper-lower position and mirror position to scan image.
9. a kind of image mosaic system that is used for duplex scanning according to claim 6 is characterized in that, the character image distributed areas that are characterized as scanning document of said scan image and the position of said character image distributed areas.
10. a kind of image mosaic system that is used for duplex scanning according to claim 6 is characterized in that, said concatenation unit is perhaps just right-hand under direct picture with the reverse side image mosaic in the scan image.
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| CN106341565A (en) * | 2015-07-10 | 2017-01-18 | 株式会社东芝 | Image Forming Apparatus And Image Forming Method For Both Side Copying |
| CN105096446A (en) * | 2015-07-20 | 2015-11-25 | 深圳怡化电脑股份有限公司 | Method and system for identifying and authenticating optically variable ink on banknotes with folding corners |
| CN106204420A (en) * | 2016-06-29 | 2016-12-07 | 深圳市优象计算技术有限公司 | A kind of pen type image scanning joining method and device |
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Address after: 510663 building A, building 17, Xiangshan Road, hi tech Industrial Development Zone, Guangdong, Guangzhou, 3 Patentee after: GUANGZHOU ZONERICH BUSINESS MACHINE CO., LTD. Address before: 510663 building A, building 17, Xiangshan Road, hi tech Industrial Development Zone, Guangdong, Guangzhou, 3 Patentee before: Guangzhou Zonerich Computer Equipment Co., Ltd. |