Improved Dark Channel Defogging Algorithm for Defect Detection in Underwater Structures

Table 7

Key processes in image disease ratio statistics.

Name	Key processes
Disease ratio statistics	Coefficient = [0, 0.5, 0.85, 1 ];
	Node = [225, 235, 245];
	ind_t = find ((file_Pix_gray ≤ node (1)) == 1);
	Area 1 = file_Pix_gray (ind_t);
	ind_t = find (((file_Pix_gray > node (1)) and (file_Pix_gray ≤ node (2))) == 1);
	Area 2 = file_Pix_gray (ind_t);
	ind_t = find(((file_Pix_gray > node (2)) and (file_Pix_gray ≤ node (3))) = = 1);
	Area 3 = file_Pix_gray (ind_t);
	ind_t = find ((file_Pix_gray > node(3)) == 1);
	Area 4 = file_Pix_gray (ind_t);