Marking center point extraction method, device and image processing system

Abstract

The invention relates to an extracting method of a marker center point. The extracting method of the marker center point comprises the following steps of choosing a search area from pixel sampling areas, calculating an average gray value of each pixel in the search area, and correcting the calculated average gray value to obtain a gray threshold value; comparing the gray threshold value with gray values of pixels in the search area, and determining all the pixels with gray values smaller than the gray threshold value in the search area; traversing all the determined pixels and comparing the gray value of a current traversed pixel with the gray value of a pixel in an adjacent area; and if the gray value of the current traversed pixel is smaller than the gray value of the pixel in the adjacent area, conducting a first type of marking to the current traversed pixel in order to sending coordinates with the first type of markers to a data processing device in the subsequent process and then determining the marker center point. The invention further relates to an extracting device of the marker center point and an image processing system. According to the extracting method and the device of the marker central point and the image processing system, precise extraction of the center of each information point in sampled images can be realized.

Description

[0001] The invention relates to the field of graphic coding, in particular to a method, device and image processing system for extracting a mark central point. Background technique [0002] With the development of graphic coding technology, in recent years, various printing media (such as books, certificates, advertisements, product signs, etc.) have been printed on various printing media (such as books, certificates, advertisements, product logos, etc.) For the convenience of information, readers or users of print media can read the optical geometric pattern into the computer or host computer through some general or special reading tools to obtain the information corresponding to the geometric pattern or the link to the corresponding information. [0003] These geometric patterns usually use color blocks of several colors (such as one-dimensional code or two-dimensional code, etc.) or dot patterns composed of sparse dot matrix to record specific data symbol information. For t...

AI Technical Summary

Problems solved by technology

However, there are certain defects in this method, among which the threshold of binarization is difficult to determine, and the black-and-white image after binarization loses the gray information with certain reference value, so it is difficult to extract the point center in the image with poor quality. , it may lead to the extraction of false information points and the loss of useful information points, and the determined position of the center of the point may not be accurate

Images