- improved

git-svn-id: http://moon:8086/svn/software/trunk/projects/opencv@323 b431acfa-c32f-4a4a-93f1-934dc6c82436

PiVideoStream.py

@@ -14,8 +14,24 @@ class PiVideoStream:
 		self.camera.exposure_mode = 'auto'
 #		self.camera.image_effect = 'colorbalance'
 #		self.camera.image_effect_params = (0,1,1,1,0,0)
+		self.camera.exposure_mode = 'auto'
+		self.camera.awb_mode = 'off'
+		self.camera.awb_gains = (1.5, 1.5)
+#		self.camera.analog_gain = 1.75
+#		self.camera.digital_gain = 1.00
+		self.rawCapture = PiRGBArray(self.camera, size=resolution)
+		self.stream = self.camera.capture_continuous(self.rawCapture,
+			format="bgr", use_video_port=True)
 
+		# initialize the frame and the variable used to indicate
+		# if the thread should be stopped
+		self.frame = None
+		self.stopped = False
+		self.fps = None
+		self.thread = None
+		self.startup = True
 
+	def printSettings(self):
 		awb_gains = self.camera.awb_gains
 		print ("sensor_mode          : " + str(self.camera.sensor_mode))
 		print ("resolution           : " + str(self.camera.resolution))
@@ -38,18 +54,6 @@ class PiVideoStream:
 		print ("image_effect_params  : " + str(self.camera.image_effect_params))
 		print ("sharpness            : " + str(self.camera.sharpness))
 
-		self.rawCapture = PiRGBArray(self.camera, size=resolution)
-		self.stream = self.camera.capture_continuous(self.rawCapture,
-			format="bgr", use_video_port=True)
-
-		# initialize the frame and the variable used to indicate
-		# if the thread should be stopped
-		self.frame = None
-		self.stopped = False
-		self.fps = None
-		self.thread = None
-		self.startup = True
-
 	def start(self):
 		# start the thread to read frames from the video stream
 		self.thread = Thread(target=self.update, args=())
@@ -59,6 +63,11 @@ class PiVideoStream:
 	def update(self):
 		# keep looping infinitely until the thread is stopped
 		for f in self.stream:
+			if self.camera.exposure_mode == 'auto':
+				if self.camera.analog_gain > 1.75 and self.camera.digital_gain == 1.0:
+					self.camera.exposure_mode = 'off'
+					self.printSettings()
+
 			if self.startup:
 				self.fps = FPS().start()
 				self.startup = False