File list (Check if you may need any files):
QUAD_old\approximation_fcn.m
........\cameraman.jpg
........\img\b1_1.jpg
........\...\b1_2.jpg
........\...\b1_3.jpg
........\...\b1_4.jpg
........\...\b1_5.jpg
........\...\b2_1.jpg
........\...\b2_2.jpg
........\...\b2_3.jpg
........\...\b2_4.jpg
........\...\b2_5.jpg
........\...\b3_1.jpg
........\...\b3_2.jpg
........\...\b3_3.jpg
........\...\b3_4.jpg
........\...\b3_5.jpg
........\...\input.jpg
........\...\Thumbs.db
........\lena.bmp
........\lena_gray_256.tif
........\lst_sq_1.m
........\OTSU_method.m
........\OTSU_QUAD.m
........\........._minvar\approximation_fcn.m
........\................\cameraman.jpg
........\................\lena.bmp
........\................\lena_colour.jpg
........\................\lena_gray_256.tif
........\................\lst_sq_1.m
........\................\MINM_QUAD.m
........\................\OTSU_QUAD.asv
........\................\Thumbs.db
........\................\Z_scan.m
........\QUADS NOT CHANGED\OTSU_QUAD\cameraman.jpg
........\.................\.........\lena.bmp
........\.................\.........\lena_gray_256.tif
........\.................\.........\OTSU_method.m
........\.................\.........\OTSU_QUAD.m
........\.................\.........\quad_top_down.m
........\.................\QUAD Tree\lena.bmp
........\.................\.........\quad_lena.m
........\.................\.........\quad_top_down.m
........\quad_top_down.m
........\QUADS NOT CHANGED\OTSU_QUAD
........\.................\QUAD Tree
........\img
........\OTSU_QUAD_minvar
........\QUADS NOT CHANGED
QUAD_old