A method of flattening deformed pages

A technology of book pages and left images, applied in the field of graphic and text processing, can solve the problems of low recognition rate of flattened images and affect scanning speed, etc., and achieve the effect of ensuring scanning quality and improving scanning speed

Inactive Publication Date: 2014-10-01
TIANJIN UNIV
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Problems solved by technology

[0006] The scanner needs to frequently move the V-shaped pressure plate when it is working, which affects the scanning speed to a certain extent, and the recognition rate of the flattened image is not high

Method used

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  • A method of flattening deformed pages
  • A method of flattening deformed pages
  • A method of flattening deformed pages

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] In order to realize the flattening of deformed pages and improve the scanning speed and the recognition rate of flattened images, an embodiment of the present invention provides a method for flattening deformed pages, see figure 1 , figure 2 , image 3 and Figure 4 , see the description below:

[0039] The embodiment of the present invention is based on digital image correlation (DIC), which is used to measure the topography of the book page in its natural state. DIC is a topography measurement technology based on the principle of binocular vision. see figure 1 , for the spatial point A, use the left and right cameras to image it, which are AL and AR respectively. The basic principle of binocular vision is that if the im...

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Abstract

The invention discloses a flattening method of a deformed page. The flattening method comprises the following steps of: acquiring a matching point set from a left image or a right image; acquiring a corresponding point set from a right view or a left view through the matching point set and a digital image related method; concentrating a corresponding point of any one point A in the matching point set into an A'; acquiring a three-dimensional coordinate of the A through a binocular vision principle by utilizing two-dimensional coordinates of the A and the A' in the left image and the right image; determining an undetermined parameter in a page curve surface parameter equation through the three-dimensional coordinate of a matching point concentrated point and a fitting method; acquiring a flattened plane coordinate of any point of a page curve surface through the flattening method; acquiring a corresponding relation between gray level distribution on a space curve surface and gray level distribution of a flattened plane according to a corresponding relation between the space curve surface and a point on the flattened plane; and calculating a flattened image point by point. The method disclosed by the invention corrects character torsion and the corrected character is the same as a shot character when the page is flatly placed; and the scanning speed of a book is improved.

Description

technical field [0001] The invention relates to the field of graphic and text processing, in particular to a method for flattening deformed book pages. Background technique [0002] Now common scanners on the market, such as Canon and Epson brand scanners, are composed of upper cover, original table, optical imaging part, photoelectric conversion part and mechanical transmission. When scanning a book, it is necessary to use the upper cover to press the book tightly on the original table to ensure a high scanning effect. But scanning books with this type of scanner is very time-consuming. To scan one page, several steps are usually required, such as reversing the book, turning the pages, buckling the book on the original table, pressing the top cover, and scanning. Due to the time-consuming, this type of scanner is not suitable for scanning a large number of book documents. [0003] Occurred on the domestic market at present is a high-speed camera, which mainly utilizes a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/10H04N1/409
Inventor 王志勇李林安王世斌
Owner TIANJIN UNIV
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