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An image matching similarity measure method and its image matching method

A similarity measurement and matching method technology, applied in the image matching similarity measurement method and the field of image matching, can solve the problems of image matching prone to errors and deviations, thin information, etc., to achieve good matching accuracy, good matching accuracy, The effect of enriching the dimension of information

Active Publication Date: 2017-10-10
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

However, the disadvantage of this method is that it only uses the position information of edge points, and the thinness of information makes image matching prone to errors and deviations.

Method used

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  • An image matching similarity measure method and its image matching method
  • An image matching similarity measure method and its image matching method
  • An image matching similarity measure method and its image matching method

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Embodiment Construction

[0049] The process flow of the image matching similarity measurement method of the present invention is as follows: figure 1 As shown, the specific steps are as follows:

[0050] (1) Select images (or image blocks, image areas) A and B of the same size;

[0051] (2) Calculate their gradient maps xGradA, xGradB in the x direction, and the gradient maps yGradA, yGradB in the y direction; x and y are any two directions perpendicular to each other; usually use horizontal and vertical directions; x The calculation of the and y-direction gradients is obtained by using gradient operators, and other methods such as wavelet transform can also be used. No matter which method can obtain the corresponding gradient, it will not affect the realization of the overall effect of the present invention;

[0052](3) Extract the binarized edge images xEdgeA, xEdgeB, yEdgeA, and yEdgeB corresponding to the gradient images xGradA, xGradB, yGradA, and yGradB respectively; here, the Canny algorithm c...

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Abstract

The invention relates to an image matching similarity measurement method and an image matching method thereof. For two images A and B with the same size, the gradient maps of them in the x and y directions are calculated respectively, and the corresponding edge images are extracted, and then calculated The Hausdorff distance xMatch between the edge images of images A and B in the x direction, and the Hausdorff distance yMatch between the edge images of images A and B in the y direction, will be used as the final similarity measure. On the basis of the original Hausdorff distance matching method, the present invention further considers the gradient vector direction, utilizes the direction information of the edge, enriches the dimension of information participating in the matching, adds effective direction constraints to the image matching, and effectively improves the accuracy rate and matching accuracy, and more robust to different images.

Description

technical field [0001] The invention belongs to the technical field of computer vision, and in particular relates to an image matching similarity measurement method and an image matching method thereof. Background technique [0002] Image matching refers to the spatial alignment of two or more images of the same scene acquired by different sensors or the same sensor at different times and under different imaging conditions, or to find the corresponding image in another image according to a known pattern. model. [0003] Image matching technology is a very important technology in computer vision. Its application fields are extremely wide, such as image analysis, target recognition, stereo vision, image navigation, motion analysis and three-dimensional reconstruction. [0004] The image matching similarity measure is a standard for measuring image matching: that is, by comparing the matching similarity measures of image I and several other images, the best matching image of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/30
Inventor 揭斐然
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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