code: def _convert_cv_to_tk(self, image_cv):
          
          # convert BGR to RGB
          image_cv_rgb = data.cv2.cvtColor(image_cv, data.cv2.COLOR_BGR2RGB)
          # convert opencv to PIL
          image_pil = PIL_Image.fromarray(image_cv_rgb)
          # convert PIL to tkinter
          return ImageTk.PhotoImage(image_pil)
docs: Convert an OpenCV image to a tkinter PhotoImage