Python: Avoiding 8bits overflow of 11bits depth

In python wrapper exemples for sync interface, 11bit depth data was mapped to 8bits without shift and overflowed. Now displaying a 16 bit depth image and shifting all the depth pixels 5 bits left to maximize the dynamic range of the image. Signed-off-by: David García Garzón <[email protected]>
nemesit · Dec 27, 2010 · 45f614d · 45f614d
1 parent bfe28d5
commit 45f614d
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diff --git a/wrappers/python/demo_cv_sync.py b/wrappers/python/demo_cv_sync.py
@@ -8,6 +8,10 @@
 while 1:
     depth, timestamp = freenect.sync_get_depth()
     rgb, timestamp = freenect.sync_get_video()
-    cv.ShowImage('Depth', depth.astype(np.uint8))
+
+    # maximize dynamic range of the given 11 bits into the used 16 bits
+    depth<<=(16-11)
+
+    cv.ShowImage('Depth', depth.astype(np.uint16))
     cv.ShowImage('Video', rgb[:, :, ::-1].astype(np.uint8))
     cv.WaitKey(10)
diff --git a/wrappers/python/demo_cv_sync_multi.py b/wrappers/python/demo_cv_sync_multi.py
@@ -14,8 +14,10 @@
     except TypeError:
         ind = 0
         continue
+    # maximize dynamic range of the given 11 bits into the used 16 bits
+    depth<<=(16-11)
     ind += 1
-    cv.ShowImage('Depth', depth.astype(np.uint8))
+    cv.ShowImage('Depth', depth.astype(np.uint16))
     cv.ShowImage('Video', rgb[:, :, ::-1].astype(np.uint8))
     cv.WaitKey(10)
     freenect.sync_stop()# NOTE: May remove if you have good USB bandwidth