CCD camera response non-uniformity correction method and device for realizing dark current compensation

Abstract

The present application discloses a multi-channel CCD camera response non-uniformity correction method, device, equipment and computer-readable storage medium for realizing dark current compensation. Wherein, the method includes pre-calculating the dark current characteristic parameters of the multi-channel CCD camera based on the ground radiation calibration method as correction parameters, and storing each correction parameter in a non-volatile memory; obtaining the current temperature value of the multi-channel CCD camera detector and the preset integration time parameter value; based on the current temperature value and the integration time parameter value, each correction parameter is used to calculate the non-uniformity correction coefficient of each pixel, so as to correct the gray value of the output image in real time. This application solves the problem that related technologies use fixed correction parameters to correct the output image and cannot be applied to the application scene where the dark current changes, and can realize the correction of CCD camera response non-uniformity for dark current compensation, and improve the effect of CCD camera response non-uniformity correction , which is conducive to obtaining high-quality and high-resolution output images.

Description

technical field [0001] The present application relates to the technical field of space optical remote sensing imaging, in particular to a multi-channel CCD camera response non-uniformity correction method and device for realizing dark current compensation. Background technique [0002] With the continuous improvement of application requirements, the requirements for imaging width, imaging resolution and other indicators required for space remote sensing to ground imaging are also getting higher and higher. In order to meet the requirements of high-resolution and large-width imaging, it is necessary to adopt a larger array of imaging detectors. However, due to the limitation of the manufacturing process, it is difficult for a single detector to meet the application requirements. Therefore, multi-detector splicing is usually used at present. At the same time, for TDI CCD detectors, in order to meet the high transfer line frequency requirements of push-broom imaging in lower or...

AI Technical Summary

Problems solved by technology

[0004] It can be understood that the digital correction coefficient obtained through the ground calibration process is suitable for the calibration working parameter conditions, especially the working temperature and integration time that affect the dark current of the detector. When the on-orbit imaging needs to adjust these two parameters , it will lead to changes in the dark current, and if the original digital correction coefficient is still used, there will be an obvious mismatch, resulting in poor non-uniformity correction effect

Images