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Multi-channel based least-square matching method

A technology of least squares and matching methods, applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve the problems that do not reflect the advantages of multi-channel information of color and multi-band images, so as to increase the amount of information and increase the contribution , the effect of reducing interference

Inactive Publication Date: 2018-05-18
黑龙江龙飞航空摄影有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

In the process of multi-channel image matching, the traditional matching method is to convert multi-channel images into grayscale images for matching, which does not reflect the advantages of multi-channel information in color and multi-band images in the image matching process

Method used

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  • Multi-channel based least-square matching method

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Embodiment Construction

[0019] In order to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] The technical solution of the present invention can adopt computer software technology to realize the automatic operation process. The embodiment of the present invention is to match two urban area RGB color UAV images, refer to figure 1 , the steps of the process of the embodiment of the present invention are as follows:

[0021] Step 1, initial matching forward intersection to obtain object space three-dimensional point coordinates.

[0022] Embodiment First input image-related parameters, and use the forward intersection method (formula (1)) to calculate the three-dimensional point coordinates P(X c ,Y c ,Z c ).

[0023]

[0024] Among them, (X s0 ,Y s0 ,Z s0 ) and (X si ,Y si ,Z si ) are the coordinates of the projection centers of the reference image and t...

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Abstract

The invention is a multi-channel based least-square matching method. The method is mainly used for matching and optimization of multi-channel remote sensing images. The method comprises the steps thatfirstly, a fixed-size image window which centers on initial rough matching points is selected; then, an error equation is established based on brightness values of corresponding pixels in corresponding channels in the image window, radiometric distortion and geometric distortion are conducted to correct iterative optimization of parameters, and the best matching point location is searched for. Compared with an original grayscale image-based matching method, the method can reduce the interference of color differences on matching results and improve the precision and stability of remote sensingimage matching.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing and image matching, and relates to a multi-channel-based least squares matching method. Background technique [0002] Least Squares Image Matching (Least Squares Image Matching) is a high-precision matching algorithm based on image grayscale proposed by Professor Ackermann of the University of Stuttgart in Germany. Since the matching accuracy of the algorithm can reach the sub-pixel level, least squares image matching is widely used It is used in many fields such as digital ground model generation, air three encryption and facial recognition. To this day, least squares matching and its related algorithms are still one of the most effective solutions for many matching tasks in the field of photogrammetry and remote sensing. [0003] As an image matching algorithm based on grayscale, the input data of the least squares matching algorithm is grayscale image. With the improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06V10/751
Inventor 杨楠张延波杨艳玲邵云明马杰
Owner 黑龙江龙飞航空摄影有限公司
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