# Mouse event handler for get_hsv
    def on_mouse(self, event, x, y, flag, param):
        if event == cv2.EVENT_LBUTTONDBLCLK:
            # Circle to indicate hsv location, and update frame
            cv2.circle(self.img_debug, (x, y), 3, (0, 0, 255))
            cv2.imshow('hsv_extractor', self.img_debug)

            # Print values
            values = self.hsv_frame[y, x]
            print('H:', values[0], '\tS:', values[1], '\tV:', values[2])

    def get_hsv(self):
        cv2.namedWindow('hsv_extractor')
        while True:
            self.grab_frame()

            # Bottom ROI
            cv2.rectangle(self.img_debug, (0, cvsettings.HEIGHT_PADDING_BOTTOM-2), (cvsettings.CAMERA_WIDTH, cvsettings.HEIGHT_PADDING_BOTTOM + cvsettings.IMG_ROI_HEIGHT + 2), (0, 250, 0), 2)

            # Top ROI
            cv2.rectangle(self.img_debug, (0, cvsettings.HEIGHT_PADDING_TOP-2), (cvsettings.CAMERA_WIDTH, cvsettings.HEIGHT_PADDING_TOP + cvsettings.IMG_ROI_HEIGHT + 2), (0, 250, 0), 2)

            self.hsv_frame = cv2.cvtColor(self.img, cv2.COLOR_BGR2HSV)

            # Mouse handler
            cv2.setMouseCallback('hsv_extractor', self.on_mouse, 0)
            cv2.imshow('hsv_extractor', self.img_debug)

            key = cv2.waitKey(0) & 0xFF
            if key == ord('q'):
                break
        self.stop_camera()
        cv2.destroyAllWindows()