Merge pull request #334 from Fruchtzwerg94/patch-2

Scale pixels down from 16 to 8 bits instead of just clipping

Author: Joshua Whitley

camera_calibration/src/camera_calibration/calibrator.py

@@ -256,7 +256,7 @@ def mkgray(self, msg):
         # TODO: get a Python API in cv_bridge to check for the image depth.
         if self.br.encoding_to_dtype_with_channels(msg.encoding)[0] in ['uint16', 'int16']:
             mono16 = self.br.imgmsg_to_cv2(msg, '16UC1')
-            mono8 = numpy.array(numpy.clip(mono16, 0, 255), dtype=numpy.uint8)
+            mono8 = numpy.array(mono16 / 256, dtype=numpy.uint8)
             return mono8
         elif 'FC1' in msg.encoding:
             # floating point image handling