The imaging principle and radiometric calibration principle of long linear array TDICCD cameras are analyzed. Calibration work is carried out using the integrating sphere and collimator while developing a more comprehensive radiometric calibration scheme. The study used quantitative analysis to gain insights into the linear responsivity of input radiance, integral time, integral series, and gain to the camera. The least-square method is chosen to fit the experimental data to obtain the corresponding linear regression equation. The correlation coefficient is above 0.99. The results show that the radiation response of TDICCD camera is excellent when other dimming parameters remain constant; the gray value of the image changes linearly with the input radiance value. Fixing the input radiance, the gray value of the image varies linearly with the gain, integral series, or integral time. The results of this research support the study of the automatic dimming of TDICCD camera.
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