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Image structure edge positioning method and device

An edge and image technology, applied in the field of positioning method and a positioning device for the edge of an image structure, can solve the problems of application limitations, missed detection and false detection, and achieve the effect of strong robustness and accurate positioning

Active Publication Date: 2017-12-12
BEIJING SINOVOICE TECH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of determining the binarized image according to the gradient, it is often necessary to set the binarization threshold parameters, and these threshold parameters are very sensitive to factors such as illumination and shadows, often resulting in missed and false detections, resulting in its failure in natural scenes. Applications are very limited

Method used

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  • Image structure edge positioning method and device
  • Image structure edge positioning method and device
  • Image structure edge positioning method and device

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Embodiment Construction

[0066]In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0067] refer to figure 1 , which shows a flow chart of the steps of a method for locating the edge of an image structure according to an embodiment of the present invention, which may specifically include the following steps:

[0068] Step 101: Obtain an image to be detected.

[0069] The image to be detected may be a photographed image or a scanned image of a business card, an ID card, a driving license, a driver's license, and the like. In the process of OCR image preprocessing, it is often necessary to extract structural edges from the image first to pave the way for subsequent perspective transformation and layout analysis. Structural edges are inherent edge patterns that may appear in images, such as horizontal lines, vertic...

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Abstract

Embodiments of the invention provide an image structure edge positioning method and device. The method comprises the following steps of: detecting structure edges of a to-be-detected image through an edge detection model, and generating an edge score matrix same as the to-be-detected image in the aspect of size, wherein interested structure edge pixel points have high scores and uninterested structure edges and non-structure edge pixel points have low scores; carrying out linear detection on the edge score matrix and obtaining candidate structure edge according to the linear detection result; and finally determining a target structure edge in the candidate structure edges according to a preset constraint condition. Through the method, structure edges are positioned according to the edge score matrix, the linear detection and the constraint condition, so that relatively strong robustness is provided for illumination and shadow, and image structure edge positioning is more correct.

Description

technical field [0001] The invention relates to the technical field of computer science, in particular to a method for locating the edge of an image structure and a device for locating the edge of an image structure. Background technique [0002] In the existing image text recognition, whether it is a photographed image or a scanned image, it is often necessary to separate the structural edges in the image before text recognition, and then perform four-point perspective transformation and layout analysis. Therefore, the location of the edge of the image structure is of great significance. [0003] Existing image structure edge detection often uses color or grayscale gradient detection methods to determine the binary image, such as Canny operator, sobel operator, etc., and then detects straight lines from the binary image and locates the structural edge. In the process of determining the binarized image according to the gradient, it is often necessary to set the binarization...

Claims

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Application Information

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IPC IPC(8): G06T7/10G06T7/13
CPCG06T2207/20081G06T2207/20084G06T7/10G06T7/13
Inventor 伍更新高大帅李健张连毅武卫东
Owner BEIJING SINOVOICE TECH CO LTD
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