.

cam_control/MemoryBackend.py

@@ -212,8 +212,15 @@ class MemoryFrame:
         
         #t = time.time()  
         arr = self._readFrame()
+
+        roi = (slice(100, -100), slice(100, -100))
         arr = arr.astype(float)
-        arr = (arr * 255 / np.max(arr)).astype(np.uint8)
+        _min, _max = arr[roi].min(), arr[roi].max()
+        arr = ((arr - _min) / (_max - _min)) * 255
+        arr = np.clip(arr, a_min=0, a_max=255).astype(np.uint8)
+
+        #arr = arr.astype(float)
+        #arr = (arr * 255 / np.max(arr)).astype(np.uint8)
         #arr = (self._readFrame()*255//1023).astype(np.uint8)
         #t1 = time.time()