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A Nonuniformity Correction Method for Remote Sensing Image

A non-uniformity correction, remote sensing image technology, applied in the field of image processing, can solve problems such as remote sensing image data distortion, achieve strong universality, take into account imaging characteristics and practicability, and improve accuracy.

Active Publication Date: 2019-06-28
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-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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  • A Nonuniformity Correction Method for Remote Sensing Image
  • A Nonuniformity Correction Method for Remote Sensing Image
  • A Nonuniformity Correction Method for 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 present invention discloses the non -uniform correction method of remote sensing images, including: according to the visible light near the infrared CMOS camera continuously variable the deep -sea imaging results and radiation response model to obtain the noise function coefficient of each image;According to the imaging results of the CMOS camera on the class of uniform sources at different points and the noise function coefficient of the cmOS camera to obtain the non -uniform correction coefficient of each image;; According to the noise function coefficient and non -uniformity correction coefficient, remote sensing images obtained through remote sensing images obtained by visible light near infrared CMOS cameras, obtained the remote sensing image of the non -uniformity correction of the visible light near infrared CMOS camera.Through the present invention, the non -uniform correction of the CMOS camera that can be visible to the integral time is variable, and the problem of the distortion of the remote sensing image data distortion of the remote sensing image data obtained.

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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Patent Type & Authority Patents(China)
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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