Non-uniform correction method of remote sensing image

Abstract

The invention discloses a non-uniform correction method of a remote sensing image. The method comprises the following steps: obtaining a noise function coefficient of each picture element according to a deep sea imaging result and a radiation response model in a continuously variable integration time of a visible light near infrared array CMOS camera; obtaining a non-uniform correction coefficient of each picture element according to imaging results of the visible light near infrared array CMOS camera for a homogeneous source in different integration times and the noise function coefficient; determining the remote sensing image obtained by the visible light near infrared array CMOS camera; and performing denoising and non-uniform correction on the remote sensing image obtained by the visible light near infrared array CMOS camera according to the noise function coefficient and the non-uniform correction coefficient to obtain a remote sensing image of non-uniform correction of the visible light near infrared array CMOS camera. By adoption of the non-uniform correction method disclosed by the invention, the non-uniform correction of the visible light near infrared array CMOS camera with variable integration time is realized, and the problem of data distortion of the remote sensing image is overcome.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a method for correcting non-uniformity of remote sensing images. Background technique [0002] Visible and near-infrared area array CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) cameras have tens of thousands of pixels. Unlike the working principle of CCD cameras, which send the charges generated by light sensing to a unified readout port one by one for reading, the working principle of CMOS cameras is as follows: level conversion is completed on each pixel, the charges are converted into voltage signals, and then The signal is transmitted to the column amplifier output of each column through the transmission line. Based on the working principle of the above-mentioned CMOS camera, due to the inconsistency of the conversion gain of the pixel and the difference of the column amplifier, the non-uniformity of the CMOS detector is wo...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is to overcome the deficiencies of the prior art, provide a non-uniformity correction method for remote sensing images, and perform effective non-uniformity correction for the visible light and near-infrared area array CMOS cameras with variable integration time, and overcome the problem of obtaining The problem of remote sensing image data distortion

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