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#!/usr/bin/python
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import cv2.cv as cv
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import sys
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import urllib2
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if __name__ == "__main__":
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cv.NamedWindow("win")
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if len(sys.argv) > 1:
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filename = sys.argv[1]
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im = cv.LoadImage(filename, cv.CV_LOAD_IMAGE_GRAYSCALE)
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im3 = cv.LoadImage(filename, cv.CV_LOAD_IMAGE_COLOR)
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else:
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url = 'https://code.ros.org/svn/opencv/trunk/opencv/samples/c/left01.jpg'
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filedata = urllib2.urlopen(url).read()
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imagefiledata = cv.CreateMatHeader(1, len(filedata), cv.CV_8UC1)
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cv.SetData(imagefiledata, filedata, len(filedata))
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im = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_GRAYSCALE)
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im3 = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_COLOR)
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chessboard_dim = ( 9, 6 )
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found_all, corners = cv.FindChessboardCorners( im, chessboard_dim )
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print found_all, len(corners)
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cv.DrawChessboardCorners( im3, chessboard_dim, corners, found_all )
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cv.ShowImage("win", im3);
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cv.WaitKey()
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