Biden的帽子忘记带了，你能用Python给它快速PS一个么？

import cv2
class WearHat():
    def __int__(self):
        self.FaceModelPath = "./haarcascade_frontalface_default.Xml"
        self.color = (0, 255, 0)  # 定义绘制颜色
    def Place(self, PeopleImg, HatImg):
        FaceModel = cv2.CascadeClassifier(self.FaceModelPath)
        PeopleImgGray = cv2.cvtColor(PeopleImg, cv2.COLOR_BGR2GRAY)  # 转换灰色
        FaceRects = FaceModel.detectMultiScale(PeopleImgGray, scaleFactor=1.2, minNeighbors=3, minSize=(32, 32))
        if len(FaceRects):  # 大于0则检测到人脸
            for FaceRect in FaceRects:
                Xmin, Ymin, Wigth, Hight = FaceRect
                HatShape = HatImg.shape
                HatImgSizeH = int(HatShape[0] / HatShape[1] * Wigth)
                if HatImgSizeH > (Ymin - 20):
                    HatImgSizeH = (Ymin - 20)
                HatImgSize = cv2.resize(HatImg, (Wigth, HatImgSizeH), interpolation=cv2.INTER_NEAREST)
                Top = (Ymin - HatImgSizeH - 20)
                if Top <= 0:
                    Top = 0
                HatImgRows, HatImgCols, _ = HatImgSize.shape
                PeopleImgROI = PeopleImg[Top:Top + HatImgRows, Xmin:Xmin + HatImgCols]
                HatImgSizeGray = cv2.cvtColor(HatImgSize, cv2.COLOR_RGB2GRAY)
                _, HatImgSizeBW = cv2.threshold(HatImgSizeGray, 10, 255, cv2.THRESH_BINARY)
                HatImgSizeBwInv = cv2.bitwise_not(HatImgSizeBW)
                PeopleImg_BG = cv2.bitwise_and(PeopleImgROI, PeopleImgROI, mask=HatImgSizeBwInv)
                HatImg_FG = cv2.bitwise_and(HatImgSize, HatImgSize, mask=HatImgSizeBW)
                dst = cv2.add(PeopleImg_BG, HatImg_FG)
                PeopleImg[Top:Top + HatImgRows, Xmin:Xmin + HatImgCols] = dst
        return PeopleImg
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if __name__ == "__main__":
    PeopleImg = cv2.imread("Biden.jpg")
    HatImg = cv2.imread("GrennHat.jpg")
    GrennPeople = WearHat.Place(PeopleImg, HatImg)
    cv2.imshow("image", GrennPeople)
    cv2.waitKey(0)
    cv2.destroyAllWindows()
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