Method of multi-point non-uniformity correction based on detector temperature

Abstract

The invention provides a multi-point non-uniform correction method based on the temperature of the detector, comprising the following steps: collecting multiple uniform background images within the working temperature range of the detector, saving the background information of each background image, and recording the corresponding The detector temperature AD value; according to the background information of each background image collected and the corresponding detector temperature AD value, the background at the current temperature of the detector is fitted; the detector is stabilized at multiple different temperature points in turn, and the Collect high-temperature background and low-temperature background at each temperature point, calculate the gain corresponding to different temperature points of the detector, and save the gain data, and save the corresponding detector temperature AD value at the same time; use the gain corresponding to different temperature points of the detector to fit the detector The gain corresponding to the current temperature; use the background at the current temperature of the detector and the gain corresponding to the current temperature of the detector to correct the infrared image. The invention does not need to open the shutter, saves the production cost, and can self-adaptively correct the infrared image.

Description

technical field [0001] The invention relates to the field of infrared image processing, in particular to a multi-point non-uniform correction method based on detector temperature. Background technique [0002] Infrared focal plane array is a new generation of infrared detector with both radiation sensitivity and signal processing functions, and it is the key device of modern infrared imaging system. Due to the influence of materials and manufacturing processes, the responsivity of each detection unit is inconsistent, resulting in the general non-uniformity of the infrared focal plane array, which affects the imaging quality of the infrared detector. [0003] The existing solution to the non-uniformity of the infrared image is to obtain the background data by periodically opening the shutter, and correct the infrared image. Opening the shutter will interrupt the detection process, affect the application of infrared detectors, and increase the cost. In addition, the existing...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-point non-uniformity correction method based on the detector temperature, aiming at solving the problem of non-uniformity of the existing infrared images

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