Display

Now we’re at the final module of the main loop, where we build the final window. In this window, we display the FPS counter and the camera image.

../_images/final.png

In this module we are dealing with the following code snippet of the Engine Loop:

main method
1def main(self):
2
3    ...
4
5        self.fps_setter()
6        self.window.window_show(self.camera_model)
7
8        ...

Let’s dive into the detailed explanations of the implementation.

self.fps_setter()

In this line, we set our final fps counter.

fps_setter()

Updates and displays the current frames per second (FPS) on the camera image.

fps_setter method
def fps_setter(self):
    fps = self.fps_counter.get_fps_filtered()
    cv.putText(self.camera_model.camera_image, f"FPS: {fps:.0f}", (10, 30), cv.FONT_HERSHEY_PLAIN, 1.2, (0, 255, 0), 1)
window_show()

  • The method displays the current frame of the camera using the cv2 libary.

window_show method
def window_show(self, class_cam):
    cv.imshow("image window", class_cam.camera_image)
    cv.waitKey(1)