python 'PngImageFile' object has no attribute 'shape'

Image.open打开的图片类型为’PngImageFile’，不能直接img.shape查看维度，要转成数组，即可查看

def crop_img(img_path):
    save_path = r'E:\Code-\ir_detection\test_gan_neg_112_0422'
    img_name = img_path.split('\\')[-1]
    image = Image.open(img_path) #(128,128)
    image = image.crop([8,8,120,120])
    image = np.asarray(image)
    print('image.shape',image.shape)
    print('save_path', save_path+'\\'+img_name)
    #image.save(save_path+'\\'+img_name)
    #image = cv2.merge([image, image, image])
    cv2.imwrite(save_path+'\\'+img_name, image)

另外,Image方法中的crop对应的四个点坐标为（x, y, x+w, y+h）