Boundary detecting method and device of net image

A boundary detection and image technology, which is applied in the field of image processing, can solve the problem of low boundary positioning accuracy of hanging network images, and achieve the effect of improving the boundary positioning accuracy
CN101727667AActive Publication Date: 2010-06-09PEKING UNIV +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2010-06-09

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Abstract

The invention discloses boundary detecting method and device of a net image, used for solving the problems of low boundary positioning precision and discontinuity of the detected boundary of the net image in the prior art. The method comprises the following steps of: confirming a plurality of detecting templates with the dimension quantity of N*N according to a Soble-Gaussian operator and a standard Gaussian operator of each confirmed detecting template; then selecting and detecting the detecting template of current pixel point according to the attribute information of the current pixel point; calculating a response value of the current pixel point by the detecting template and confirming whether the current pixel point is the pixel point on the boundary or not by comparing with the magnitude relation of a response value of a pixel point which is adjacent to the current pixel point. The provided scheme can directly carry out boundary detection on the boundary of the net image in all directions and improves the boundary positioning precision of the net image.
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Description

technical field

[0001] The invention relates to the technical field of image processing, in particular to a method and device for detecting the boundary of a hanging net image. Background technique

[0002] For binary devices such as printers, before printing, the image to be printed needs to be processed by image netting. Compared with the original image with continuous tone, the image after netting processing has discrete characteristics, so it is necessary to directly process the netting image Processing becomes very difficult. Therefore, in the prior art, before processing the net-hanging image, it is first necessary to determine the boundary position of the net-hanging image, and then process the net-hanging image.

[0003] At present, the method of detecting the boundary position of the hanging net image is to directly use the Sobel or Gaussian template, use the gray scale weighting algorithm of the upper and lower, left and right adjacent points of the pixel point, a...

Claims

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