Add a script which prints current camera intensity on screen

Calculations/live_intensity.py

@@ -0,0 +1,23 @@
+import cv2
+import numpy as np
+
+def main():
+    capture = cv2.VideoCapture(0)
+    cv2.namedWindow("Camera", cv2.WINDOW_AUTOSIZE)
+
+    while True:
+        ret, frame = capture.read()
+
+        frame_mono = np.mean(frame, axis=2)
+        intensity = np.mean(frame_mono)
+
+        print(f"\033[H\033[2J{intensity:5.1f}")
+
+        cv2.imshow('Camera', frame)
+
+        if cv2.waitKey(1) == ord('q'):
+            break
+
+
+if __name__ == "__main__":
+    main()