Fig. 1. Schematic diagram of sensor Bayer array

Fig. 2. Schematic of experimental system

Fig. 3. Radiation damage of dark and color image

Fig. 4. Distribution of dark current noise in dark image

Fig. 5. Scatter diagram of radiation life of main board and sensor board

Fig. 6. Gray scale stripe of video test card before and after irradiation. (a) Before irradiation; (b) 50 Gy; (c) 101 Gy; (d) 154 Gy

Fig. 7. Logic block diagram of fixed image denoising algorithm

Fig. 8. Grid images of pixel values for each channel of the frame image before and after noise reduction. (a) Color grid image before noise reduction; (b) color grid image after noise reduction; (c) gray scale stripe before noise reduction; (d) gray scale stripe after noise reduction

Fig. 9. Relationship between pixel value and total ionizing dose for gray scale stripe image. (a) Gray value; (b) red pixel; (c) green pixel; (d) blue pixel

Fig. 10. Scatterplot of color image pixel value with total dose

Fig. 11. Scatterplot of the average pixel value for each gray channel after correction with the total dose