Non-uniform correction method of remote sensing image

A non-uniformity correction, remote sensing image technology, applied in the field of image processing, can solve the problems of remote sensing image data distortion, etc., to achieve the effect of strong universality, taking into account imaging characteristics and feasibility, and strong engineering application significance

Active Publication Date: 2017-06-13
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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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-u...

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  • Non-uniform correction method of remote sensing image
  • Non-uniform correction method of remote sensing image
  • Non-uniform correction method of remote sensing image

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Embodiment Construction

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the public implementation manners of the present invention in detail with reference to the accompanying drawings.

[0047] refer to figure 1 , shows a flowchart of steps of a method for correcting non-uniformity of remote sensing images in an embodiment of the present invention. In this embodiment, the method for correcting the non-uniformity of the remote sensing image can be mainly applied to a visible-near-infrared area-array CMOS camera, and performs non-uniformity correction on the imaging of the visible-near-infrared area-array CMOS camera.

[0048] Wherein, the non-uniformity correction method of the remote sensing image includes:

[0049] Step 101 , according to the imaging principle of the visible-near-infrared area array CMOS camera, a radiation response model of the CMOS camera with variable integration time is established.

[...

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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...

Claims

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Application Information

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IPC IPC(8): H04N5/357H04N5/365H04N5/374
CPCH04N25/60H04N25/671H04N25/76
Inventor 王爱春傅俏燕闵祥军陆书宁潘志强韩启金张学文刘李李照洲赵航
Owner CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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