I have started my journey into the world of OpenCV using Python on my Mac. These are my first steps with it.
Installing OpenCV for Python on the Mac
# Install numpy as a prerequisite
sudo port install numpy
# Install OpenCV with the Python API
sudo port install opencv +python27
(The port command is part of Macports)
Capturing an images from a webcam
1 2 3 4 5 6 7 8 9 10 | #!/usr/bin/env python2.7
import cv
cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cv.CaptureFromCAM(camera_index)
frame = cv.QueryFrame(capture)
cv.SaveImage("pic.jpg", frame)
|
(I tested this with the iSight camera on my Macbook Pro)
Displaying live video
1 2 3 4 5 6 7 8 9 10 11 | #!/usr/bin/env python2.7
import cv
CAMERA_INDEX = 0
cv.NamedWindow("Video", cv.CV_WINDOW_AUTOSIZE)
capture = cv.CaptureFromCAM(CAMERA_INDEX)
while True:
frame = cv.QueryFrame(capture)
cv.ShowImage("w1", frame)
|