Fig. 1. Schematic of energy reconstruction principle

Fig. 2. Technical roadmap of relative radiometric correction method based on the energy reconstruction of the same pixel in the overlap region

Fig. 3. Matching effect of level 0 image in overlap area

Fig. 4. Gray resampling method of homonymous pixels

Fig. 5. Image comparison before and after energy reconstruction. (a) Left CCD image before energy reconstruction; (b) image after energy reconstruction; (c) right CCD image before energy reconstruction

Fig. 6. Comparison of gray scale lookup table before and after energy reconstruction

Fig. 7. Comparison of radiometric correction effect in overlap area image before and after energy reconstruction. (a) Before energy reconstruction; (b) after energy reconstruction

Fig. 8. Comparison of images before and after moment matching. (a) City image before moment matching; (b) city image after moment matching; (c) lake image before moment matching; (d) lake image after moment matching

Fig. 9. Image location of the overlap area to be tested. (a) Gobi in Dunhuang; (b) Qinghai Lake

Fig. 10. Image of the overlap area before and after energy reconstruction. (a) Gobi in Dunhuang; (b) Qinghai Lake

Fig. 11. Relative radiation uniformity in the overlap area

Fig. 12. Processing effect of histogram statistic matching method. (a) City; (b) desert; (c) snow mountain

Fig. 13. Processing effect of proposed method. (a) City; (b) desert; (c) snow mountain

Fig. 14. Comparison of pixel DN between the two methods in the fringe positions. (a) City; (b) desert; (c) snow mountain

Fig. 15. Comparison of fringe coefficients between the two methods in overlap area. (a) City; (b) desert; (c) snow mountain