Cold reflection repairing method for ambient temperature self-adaptive infrared imaging system

Abstract

A cold reflection repairing method for an ambient temperature self-adaptive infrared imaging system comprises the steps that when cold reflection black spots appear before an infrared imaging system leaves a factory, distribution parameters of each pixel of an image are calculated and stored in the system, and meanwhile the current temperature TS and the temperature T0 calibrated by a non-uniformity coefficient before the infrared imaging system leaves the factory are stored; when the equipment is powered on for use, the distribution parameter of each pixel and TS and T0 are read from the storage device; when the equipment is powered on for non-uniform correction, the temperature Tc during correction is recorded; when the equipment is used, non-uniform correction is carried out on each pixel; and a temperature correlation coefficient is calculatedin real time according to the current system temperature T, TS, T0 and Tc, a restoration parameter of each pixel is calculated according to the distribution parameter and the temperature correlation coefficient, the restoration parameter is superposed on a non-uniform correction result of each pixel, and finally an image subjected to coldreflection black spot restoration is output.

Description

technical field [0001] The invention relates to the technical field of infrared imaging, in particular to a method for repairing cold reflection dark spots of an infrared imaging system. Background technique [0002] In the cooled infrared imaging system with an optical system, the cooling surface of the internal detector will be reflected by a certain optical element in the front during imaging. At this time, the detector will detect the signal of its own cold surface that is much lower than the ambient temperature. A dark spot will be formed in the center of the field of view, which seriously affects the imaging quality and target recognition. This imaging defect caused by repeated reflection is called cold reflection, also known as the temperature difference regeneration effect. Generally, the temperature of the infrared focal plane is controlled between 90-110K, and the thermal difference with the ambient temperature of 300K is large, and the extremely weak reflection wi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for repairing cold reflection black spots in the infrared imaging system in view of the problem of dark spots in the imaging of the current cooling infrared imaging system, which can realize the repair of the cold reflection problem in the infrared imaging system as the ambient temperature changes , reduce the difficulty of optical design and processing technology requirements, reduce the impact of cold reflection on imaging, and improve image quality