Fig. 1. Flow chart of underwater image enhancement algorithm based on color balance and multiscale fusion

Fig. 2. Schematic diagram of light absorption by water

Fig. 3. Original and color balanced images

Fig. 4. Principle of CLAHE algorithm

Fig. 5. Original image and histograms of its color channels

Fig. 6. CLAHE processed image and histograms of its color channels

Fig. 7. Weight maps of two images

Fig. 8. Image fusion process

Fig. 9. Color restoration effects

Fig. 10. Original images and images processed by different algorithms

Fig. 11. Results of ablation experiment