需要帮助用OpenCV从手上的皮肤掩盖面部皮肤

Question

假设我有一张图片：Sign Language

在图像中隔离皮肤后，它看起来像：The skin on the hand and face are isolated.

如何遮盖脸部的皮肤，使我只能从图像中获取手部？

编辑：

我如何从图像中隔离皮肤：

import cv2
import sys
import numpy

im = cv2.imread("test.png")

im_ycrcb = cv2.cvtColor(im, cv2.COLOR_BGR2YCR_CB)
skin_ycrcb_mint = numpy.array((0, 133, 77))
skin_ycrcb_maxt = numpy.array((255, 173, 127))
skin_ycrcb = cv2.inRange(im_ycrcb, skin_ycrcb_mint, skin_ycrcb_maxt)
cv2.imwrite("testing.jpg", skin_ycrcb)