Camera post-irradiation imaging resolution degradation evaluation method based on image sensor quantum efficiency
An image sensor and quantum efficiency technology, applied in image communication, television, electrical components, etc., can solve problems that affect camera imaging resolution, signal-to-noise ratio, color reproduction, device parameter degradation, and functional degradation.
Pending Publication Date: 2022-07-29
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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However, the γ-rays and neutrons in the nuclear radiation environment act on the camera system, which can produce transient effects and cumulative radiation damage, resulting in device parameter degradation or functional degradation, affecting the imaging resolution, signal-to-noise ratio, and color reproduction of the camera.
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[0054] The invention relates to a method for evaluating the resolution degradation of a camera after irradiation based on the quantum efficiency of an image sensor. Card 6, computer 7, neutral gray backplane 8, spectrophotometer 9 and power supply 10, the camera 1 is fixed in the fixture 2, the color test card 6 is placed on the neutral gray backplane 8, and the neutral gray backplane 8. Fix the reflective surface light source 4 and the reflective surface light source 5 on both sides, and connect the camera 1 to the computer 7 and the power supply 10. The specific operation is carried out according to the following steps:
[0055] a. Fix the optical lens 3 on the camera 1, the unirradiated camera 1 is fixed in the fixture 2, the CMOS active pixel sensor model used by the camera 1 is AR0230, and its resolution is 1920×1080;
[0056] b. Fix the color test card 6 in the center of the neutral gray backplane 8, place the reflective surface light source 4 and the reflective surface ...
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The invention relates to a camera post-irradiation resolution degradation evaluation method based on image sensor quantum efficiency. A device involved in the method is composed of a camera, an optical lens, a clamp, a computer, a power supply, a neutral gray backboard, a reflection surface light source spectrophotometer and a color test card. The method comprises the following steps: firstly, adjusting a clamp to shoot a color test card, then adjusting an optical lens, collecting an image after the test card is clearly imaged, selecting red, green and blue blocks and gray scales as analysis objects, and acquiring related information of parameters such as coordinate values of the selected red, green and blue blocks under an RGB coordinate system, maximum and minimum gray values of the image and the like through data processing software. And then calculating the degradation rate of the resolution of the camera after irradiation. The resolution degradation degree of the camera under different accumulated doses can be rapidly evaluated, and the method is simple and high in practicability.
Description
technical field [0001] The invention relates to the technical field of camera calibration, in particular to a method for evaluating the degradation of imaging resolution after irradiation of a camera based on the quantum efficiency of an image sensor. Background technique [0002] In today's industrial production and daily life, cameras have become an important tool for collecting environmental information. Compared with expensive professional equipment, cameras have many advantages such as low price and convenient operation. The camera system generally consists of an optical system, an imaging system, a data processing and transmission system. The imaging system is an important part of the camera, and its performance determines the imaging resolution of the camera. Resolution refers to the number of line pairs that can be distinguished per unit length. To a certain extent, it can be used as an important parameter for judging whether the camera image is clear or not. It is...
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IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 冯婕王海川李豫东文林郭旗
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI