image[h-30:h, 0:30] = [114,114,114]
image[h-30:h, w-30:w] = [114,114,114]
# image[ymin:ymax,xmin:xmax] = [114,114,114]
image[h-30:h, 0:30] = [114,114,114]
image[h-30:h, w-30:w] = [114,114,114]
# image[ymin:ymax,xmin:xmax] = [114,114,114]