0 and img_val <= 00: return 0     if img_val >= 00 and img_val <= 00: return 0     if img_val >= 00 and img_val <= 00: return 0     if img_val >= 00 and img_val <= 000: return 0     if img_val >= 000 and img_val <= 000: return 0     if img_val >= 000 and img_val <= 000: return 0     if img_val >= 000 and img_val <= 000: return 0     if img_val >= 000