Fig. 1. Simple schematic diagram of adaptive gain imaging system

Fig. 2. Encoding process diagram of channel programming table for adaptive gain imaging mode

Fig. 3. Coding process diagram of calibration mode channel programming table

Fig. 4. Flow Chart for calculating the onboard gain radio coefficient

Fig. 5. Image of four gains and adaptive gains in exterior imaging

Fig. 6. Strip noise removal effect diagram

Fig. 7. K-Means algorithm flowchart

Fig. 8. Gains with the highest and second most occurrences and adaptive gain distribution of channel 13

Fig. 9. Schematic diagram of elbow method to search for K value in K-Means classification

Fig. 10. Schematic diagram of K-Means classification results

Fig. 11. Raw data points obtained by classifying and averaging two gain levels in several spectral channels

Fig. 12. Measurement results of the ratio coefficient between MG and LG for channels 1, 2, 3, 14, and 15

Fig. 13. Measurement results of the ratio coefficient between LG and ULG for channels 2, 3, 4, and 5

Fig. 14. Comparison of low gain inversion and high gain output for channel 2 external imaging