def check_blank_image(file): img = cv2.imread(file) if img is None: return False # grary img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) # threshold to two value image ret,thresh = cv2.threshold(img, 127, 255,cv2.THRESH_BINARY) # white % nonzero = np.count_nonzero(thresh) all = thresh.size return (nonzero / float(all)) > 0.99 解释下：先转灰度，再做二值化，然后判断白色占比