useful opencv function

Python: cv2.resize(src, dsize[, dst[, fx[, fy[, interpolation]]]]) 

image = cv2.imread('ironman.png')

gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

link address: https://extr3metech.wordpress.com/2012/09/23/convert-photo-to-grayscale-with-python-opencv/

Python: cv2.imread(filename[, flags]) → retval

        Flags specifying the color type of a loaded image:

                    CV_LOAD_IMAGE_GRAYSCALE - If set, always convert image to the grayscale one

Python: cv2.imwrite(filename, img[, params]) → retval

        filename – Name of the file.

        image – Image to be saved.

Python: cv2.VideoCapture() → <VideoCapture object>

Python: cv2.VideoCapture(filename) → <VideoCapture object>

Python: cv2.VideoCapture(device) → <VideoCapture object>

  • filename – name of the opened video file (eg. video.avi) or image sequence (eg. img_%02d.jpg, which will read samples like img_00.jpg, img_01.jpg, img_02.jpg, ...)
  • device – id of the opened video capturing device (i.e. a camera index). If there is a single camera connected, just pass 0.


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