如何在Qt标签上显示裁剪的图像？

Question

我想用代码“ self.displayImage（2）”将裁剪后的图像（变量为“ roi_color”的图像）显示为Qt标签，并将“ self”更改为“ roi_color”，但我的应用程序停止了代替工作

def haarClicked(self):
        gray = cv2.cvtColor(self.image, cv2.COLOR_BGR2GRAY)
        faces = face_cascade.detectMultiScale(gray, 1.25, 2)
        for (x, y, w, h) in faces:
            cv2.rectangle(self.image, (x, y), (x+w, y+h), (255, 0, 0), 2)
            roi_gray = gray[y:y + h, x:x + w]
            roi_color = self.image[y:y + h, x:x + w]
            #cv2.imshow("cropped", roi_color)
            self.image = self.image[y:y + h, x:x + w]
            self.displayImage(2)

 def displayImage(self, windows=1):
        qformat=QImage.Format_Indexed8

        if len(self.image.shape)==3:
            if(self.image.shape[2])==4:
                qformat=QImage.Format_RGBA8888
            else:
                qformat=QImage.Format_RGB888
        img=QImage(self.image,self.image.shape[1],self.image.shape[0],self.image.strides[0],qformat)

        img=img.rgbSwapped()
        if windows==1:
            self.imgLabel.setPixmap(QPixmap.fromImage(img))
            self.imgLabel.setAlignment(QtCore.Qt.AlignHCenter|QtCore.Qt.AlignVCenter)
            self.imgLabel.setScaledContents(True)
        if windows==2:
            self.haarLabel.setPixmap(QPixmap.fromImage(img))
            self.haarLabel.setAlignment(QtCore.Qt.AlignHCenter|QtCore.Qt.AlignVCenter)
            self.haarLabel.setScaledContents(True)