用Python给头像加上圣诞帽或圣诞老人小图标

 # dlib人脸关键点检测器
      predictor_path = "shape_predictor_5_face_landmarks.dat"
      predictor = dlib.shape_predictor(predictor_path)  

      # dlib正脸检测器
      detector = dlib.get_frontal_face_detector()

      # 正脸检测
      dets = detector(img, 1)

      # 如果检测到人脸
      if len(dets)>0:  
          for d in dets:
              x,y,w,h = d.left(),d.top(), d.right()-d.left(), d.bottom()-d.top()
              # x,y,w,h = faceRect  
              cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2,8,0)

              # 关键点检测，5个关键点
              shape = predictor(img, d)
              for point in shape.parts():
                  cv2.circle(img,(point.x,point.y),3,color=(0,255,0))

              cv2.imshow("image",img)
              cv2.waitKey() 

# 选取左右眼眼角的点
              point1 = shape.part(0)
              point2 = shape.part(2)

              # 求两点中心
              eyes_center = ((point1.x+point2.x)//2,(point1.y+point2.y)//2)

              # cv2.circle(img,eyes_center,3,color=(0,255,0))  
              # cv2.imshow("image",img)
              # cv2.waitKey()

              #  根据人脸大小调整帽子大小
              factor = 1.5
              resized_hat_h = int(round(rgb_hat.shape[0]*w/rgb_hat.shape[1]*factor))
              resized_hat_w = int(round(rgb_hat.shape[1]*w/rgb_hat.shape[1]*factor))

              if resized_hat_h > y:
                  resized_hat_h = y-1

              # 根据人脸大小调整帽子大小
              resized_hat = cv2.resize(rgb_hat,(resized_hat_w,resized_hat_h)) 

layer.paste(logo, (img.size[0] - logo.size[0], img.size[1]-logo.size[1]))

   # 水印图片
    num = random.randint(1, 5)
    logo = Image.open("img_icon/santa_" + str(num) + ".png")

    img = Image.open(imgPath)

    print(img.size, logo.size)

    # 图层
    layer = Image.new("RGBA", img.size, (255, 255, 255, 0))
    layer.paste(logo, (img.size[0] - logo.size[0], img.size[1]-logo.size[1]))


    # 覆盖
    img_after = Image.composite(layer, img, layer)
    # img_after.show()
    img_after.save(outImgePath)