Image matching method

A matching method and image technology, applied in the field of image matching, can solve the problems of large amount of calculation and time-consuming matching process

Inactive Publication Date: 2009-10-14
GUANGDONG UNIV OF TECH
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Problems solved by technology

The disadvantage of this method is that the matching process is computationally intensive and takes a lot of time. The larger the template image or the larger the sear...

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Embodiment Construction

[0014] The present invention provides an image matching method, such as figure 1 As shown, it includes the following steps:

[0015] (1) Use the image collector to collect the image to be matched, and call out the template image from the image processor;

[0016] (2) The image to be matched and the template image are reduced by one time in both the width and height directions;

[0017] (3) Repeat step (2) until the matching image and template image reach the specified size, and use gray-scale normalized cross-correlation matching on the reduced image to obtain the best matching position (x, y);

[0018] (4) Return to the previous level of the image that has been doubled down and perform further matching at 9 search positions in the range of (2x-1~2x+1, 2y-1~2y+1) to obtain the new best Matching position (x, y);

[0019] (5) Repeat step (4) until you return to the first level image, that is, the original image, perform the final matching, and obtain the best matching position and m...

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Abstract

The invention relates to an image matching method, comprising the following steps: (1) collecting images to be matched by an image collector and extracting template images from an image processor; (2) reducing the images to be matched and template images by half in the directions of width and height; (3) repeating step (2) until the images to be matched and template images reach specified sizes and carrying out gray scale normalization cross correlation matching on the reduced images to obtain the optimal matching positions (x, y); (4) returning to the previous images which are reduced by half and carrying out further matching on 9 search positions within the range of ((2x-1)-(2x+1), (2y-1)-(2y+1)) to obtain new optimal matching positions (x, y); (5) repeating step (2) until returning to the primary image, namely the original image, and carry out final matching to obtain the optimal matching positions and matching values. The method features shorter matching time and smaller amount of calculation.

Description

Technical field [0001] The invention belongs to a graphics processing method, and particularly relates to an image matching method. Background technique [0002] With the development of science and technology, image matching has become a very important technology in the field of image information processing. Now about 40% of machine vision applications need to use image matching technology, the application areas involved range from industrial detection to missile terrain matching, optical and radar image tracking, automatic monitoring of industrial assembly lines, automatic monitoring of industrial instruments, resources Analysis, weather forecasting, medical diagnosis, traffic management, character recognition and image retrieval, etc. Image matching research involves image acquisition, image preprocessing, image segmentation, feature extraction, etc., and is closely integrated with computer vision, multi-dimensional signal processing and numerical calculation methods. It is als...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 程良伦江伟欢衷柳生陈伟陈聪传
Owner GUANGDONG UNIV OF TECH
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