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Examples/opencv2-python/picamera/Eksempel4/eksempel4.py

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+# Example showing how to grab frames using the PiCamera module instead of OpenCV
+# import the necessary packages
+from picamera.array import PiRGBArray
+from picamera import PiCamera
+from fractions import *
+import time
+import cv2
+ 
+ 
+print("OpenCV version = " + cv2.__version__)
+ 
+# initialize the camera and grab a reference to the raw camera capture
+camera = PiCamera()
+time.sleep(1) # Wait for camera
+
+camera.resolution = (640, 480)
+camera.framerate = 30
+
+camera.shutter_speed = camera.exposure_speed
+camera.exposure_mode = 'off'
+
+gain = camera.awb_gains
+camera.awb_mode='off'
+#gain = (Fraction(2,1), Fraction(1,1))
+#gain = (1.5, 1.5)
+camera.awb_gains = gain
+
+print("shutter_speed = ", camera.shutter_speed)
+print("awb_gains = ", gain)
+
+rawCapture = PiRGBArray(camera, size=camera.resolution)
+ 
+# Open a window
+WIN_RF = "Frame";
+cv2.namedWindow(WIN_RF);
+cv2.moveWindow(WIN_RF, 100, 100);
+
+
+# allow the camera to warmup
+time.sleep(0.1)
+ 
+while True:
+    # capture frames from the camera
+    camera.capture(rawCapture, format="bgr", use_video_port=True)
+    # grab the raw NumPy array representing the image
+    image = rawCapture.array
+
+    # show the frame
+    cv2.imshow(WIN_RF, image)
+    key = cv2.waitKey(4) & 0xFF
+
+    # if the `q` key was pressed, break from the loop
+    if key == ord("q"):
+        break
+
+
+