Method for synthesizing color image by three-line-array camera images

Abstract

The invention discloses a method for synthesizing color images by three-line-array camera images. The objective of the invention is to overcome the problems of precision, efficiency, error distribution, need of being cut into small-format images and the like when a three-line-array camera single-waveband image is synthesized into a three-channel color image in the prior art. The method comprises the following steps of: resolving a pixel offset number by using calibration parameters of the three-linear-array camera, selecting a main image, establishing a three-passband color image with the samesize as the main image, partitioning the image, extracting sift characteristics by blocks, matching the sift characteristics by blocks, sharpening the image, and sampling a single-waveband image by blocks to obtain a three-channel color image. According to the method, the defects of an existing three-linear-array image synthesis technology are overcome, the number of image offset pixels between wavebands is calculated through calibration parameters, a single-waveband image is flexibly partitioned, and the purposes of high efficiency, high precision, uniform error distribution and whole-band color image synthesis are achieved; the method can adapt to three-linear-array image synthesis of various landforms and various single-waveband included angles, and meanwhile the requirement for hardware is lowered to a certain extent.

Description

technical field [0001] The invention relates to an algorithm for synthesizing color images of three-line-array camera images, in particular to a method for block matching and block sampling to synthesize three-channel color images based on payload camera calibration parameters, so as to be applicable to different terrain features and scanning lines in various bands. Algorithm for synthesizing high-quality color images from the entire band of three-line array camera images with a certain angle range between them. Background technique [0002] At present, in the process of using the three-line array camera to obtain the orthophoto image (DOM) of the survey area, it is necessary to synthesize the single-band image to generate a color image, and then obtain the color DOM image or pseudo-color result image through geometric correction, which is more suitable for use. It is more in line with the real appearance of the actual land features and landforms, and can also obtain a wider...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the accuracy, efficiency, and error distribution existing in the prior art when synthesizing single-band images of three-line array cameras into three-channel color images, the present invention needs to be cut into small-format images, and then re-synthesize the color images to give the subsequent measurement area the entire frame. The production of projective images brings the problem of difficult splicing, and a method for synthesizing color images from three-line array camera images is provided.

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