A method and system for uniform light and color uniformity between images taking into account two-dimensional distribution of radiation

Abstract

A method and system for uniform light and color between images that take into account the two-dimensional distribution of radiation, including subject-level smoothing of the image to be uniformly light and color to remove overly bright and dark targets in the foreground, statistical mean and variance, and use of overall statistical parameters to Radiation adjustment is performed on each smoothed image; the radiation adjustment results are pre-stitched to obtain a reference low-frequency image; Contourlet transformation is performed to obtain the separated high- and low-frequency parts, the difference method is used to perform radiation adjustment on the low-frequency part, and Contourlet inverse transformation is performed to obtain the single Frame the radiation-adjusted image; stitch all the radiation-adjusted images to obtain the final spliced ​​image with light and color uniformity results. The processing method of the present invention is clear and operable. It can not only eliminate the problem of inconsistent brightness and hue between images in different periods, but also solve the problem of inconsistent brightness distribution in the image itself due to sensor limitations, so that the final image splicing result has better vision. Effect.

Description

technical field [0001] The invention relates to the technical field of remote sensing image processing, in particular to a method and system for uniform light and color between images in consideration of two-dimensional distribution of radiation. Background technique [0002] Due to different imaging conditions such as acquisition time, illumination, photographing angle, and object types, remote sensing images have uneven brightness distribution, uneven contrast, and inconsistent colors among images, which greatly restricts subsequent orthophotos. Effects of using remote sensing imagery in stitching and other image engineering applications. Color uniformity is the process of eliminating these inhomogeneities between images. Therefore, in order to express the objective real world more accurately and truly, obtain high-quality image information and use it effectively, uniform light and color are very necessary. [0003] In recent years, UAV imaging technology has developed ra...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes a technical solution for uniform light and color between images that takes into account the two-dimensional distribution of radiation. Inconsistent brightness distribution caused by sensor limitations makes the final image stitching results have better visual effects

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