dushu.py 文件源码

def img_contour_select(ctrs, im):
    # ????????????
    cand_rect = []
    for item in ctrs:
        epsilon = 0.02*cv2.arcLength(item, True)
        approx = cv2.approxPolyDP(item, epsilon, True)  
        if len(approx) <= 8:
            rect = cv2.minAreaRect(item)
            if rect[1][0] < 20 or rect[1][1] < 20:
                continue
            if rect[1][0] > 150 or rect[1][1] > 150:
                continue        
            #ratio = (rect[1][1]+0.00001) / rect[1][0]
            #if ratio > 1 or ratio < 0.9:
            #    continue
            box = cv2.boxPoints(rect)
            box_d = np.int0(box)
            cv2.drawContours(im, [box_d], 0, (0,255,0), 3)
            cand_rect.append(box)
    img_show_hook("????", im)   
    return cand_rect