im = cv.LoadImage(filename, cv.CV_LOAD_IMAGE_GRAYSCALE)
im3 = cv.LoadImage(filename, cv.CV_LOAD_IMAGE_COLOR)
else:
- url = 'http://code.opencv.org/svn/opencv/trunk/opencv/samples/cpp/left01.jpg'
- filedata = urllib2.urlopen(url).read()
- imagefiledata = cv.CreateMatHeader(1, len(filedata), cv.CV_8UC1)
- cv.SetData(imagefiledata, filedata, len(filedata))
- im = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_GRAYSCALE)
- im3 = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_COLOR)
+ try: # try opening local copy of image
+ fileName = '../cpp/left01.jpg'
+ im = cv.LoadImageM(fileName, False)
+ im3 = cv.LoadImageM(fileName, True)
+ except: # if local copy cannot be opened, try downloading it
+ url = 'http://code.opencv.org/svn/opencv/trunk/opencv/samples/cpp/left01.jpg'
+ filedata = urllib2.urlopen(url).read()
+ imagefiledata = cv.CreateMatHeader(1, len(filedata), cv.CV_8UC1)
+ cv.SetData(imagefiledata, filedata, len(filedata))
+ im = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_GRAYSCALE)
+ im3 = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_COLOR)
+
chessboard_dim = ( 9, 6 )
found_all, corners = cv.FindChessboardCorners( im, chessboard_dim )