prod: Add dust visualisation script

Signed-off-by: Naushir Patuck <[email protected]>

utils/dust_img.py

@@ -0,0 +1,24 @@
+#!/usr/bin/python3
+
+import math
+import rawpy
+import cv2
+import sys
+
+if len(sys.argv) < 3:
+    print(f'Usage: {sys.argv[0]} <filename> <threshold>')
+    sys.exit(-1)
+
+filename = sys.argv[1]
+threshold = int(sys.argv[2])
+
+image = rawpy.imread(filename)
+raw = image.raw_image
+bpp = int(math.log2(image.white_level + 1))
+raw = raw << (16 - bpp)
+
+raw[raw < threshold] = 65535
+
+cv2.imshow(f'Threshold {threshold}', raw)
+cv2.waitKey(0)
+cv2.destroyAllWindows()