added fps display

ocv_corner_tracker.py

@@ -287,6 +287,8 @@ if __name__ == '__main__':
 
 		key_wait = -1
 		while True:
+			# Start timer
+			timer = cv2.getTickCount()
 			# Read a new frame
 			ok, image = video.read()
 			if ok:
@@ -296,8 +298,15 @@ if __name__ == '__main__':
 					mean_distance = ct.process(image, image_anno)
 					if mean_distance is not None:
 						cv2.putText(image_anno, f"Distance [{i}] : ({mean_distance[0]:+05.2f}, {mean_distance[1]:+05.2f})",
-								(20, 25 + 25 * i), cv2.FONT_HERSHEY_SIMPLEX, 0.5, ct.color, 1)
+								(20, 20 + 20 * i), cv2.FONT_HERSHEY_SIMPLEX, 0.5, ct.color, 1)
 					i += 1
+
+				# Calculate Frames per second (FPS)
+				fps = cv2.getTickFrequency() / (cv2.getTickCount() - timer)
+				# Display FPS on frame
+				cv2.putText(image_anno, "FPS : " + str(int(fps)), (20, image_anno.shape[0] - 20),
+							cv2.FONT_HERSHEY_SIMPLEX, 0.5, (50, 170, 50), 1)
+
 				cv2.imshow(f"Image Anno", image_anno)
 			else:
 				video.set(cv2.CAP_PROP_POS_FRAMES, 0)