Image Processing Blog

 Opencv Color Conversion Gray Scale img = cv2.imread( "image.jpg" ) gray = cv2.cvtColor(img , cv2.COLOR_BGR2GRAY)

 Opencv Get Frame Width and Height import cv2 capture = cv2.VideoCapture( 'readvideo.mp4' ) if capture.isOpened(): w = capture.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH) h = capture.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT) w = capture.get( 3 ) h = capture.get( 4 ) f = capture.get(cv2.cv.CV_CAP_PROP_FPS)

How to install Opencv Python using Pip? pip install opencv-python pip install opencv-contrib-python  

How to make  resizable window in opencv python  import cv2 cv2.namedWindow( "o" , cv2.WINDOW_NORMAL) im = cv2.imread( "image.jpg" ) resized = cv2.resize(im , ( 720 , 480 )) cv2.imshow( "output" , resized) cv2.waitKey( 0 )

 Opencv Python Read Video From Camera import cv2 captureImage = cv2.VideoCapture( 0 ) while ( True ): ret , frame = captureImage.read() gray = cv2.cvtColor(frame , cv2.COLOR_BGR2GRAY) cv2.imshow( 'image' , gray) if cv2.waitKey( 1 ) & 0xFF == ord ( 'q' ): break captureImage.release() cv2.destroyAllWindows()

 OpenCV Python Webcam Control import cv2 cap = cv2.VideoCapture( 0 ) if not cap.isOpened(): raise IOError ( "webcam not available" ) while True : ret , f = cap.read() f = cv2.resize(f , None, fx = 0.5 , fy = 0.5 , interpolation =cv2.INTER_AREA) cv2.imshow( 'I' , f) c = cv2.waitKey( 1 ) if c == 27 : break cap.release() cv2.destroyAllWindows()