be63ce723f
updated links in cheatsheet renamed directory for Mat tutorial changed links from willow docs to opencv.itseez.com, from Trac to current Redmine
60 lines
1.5 KiB
Python
Executable File
60 lines
1.5 KiB
Python
Executable File
#! /usr/bin/env python
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print "OpenCV Python version of edge"
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import sys
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import urllib2
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import cv2.cv as cv
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# some definitions
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win_name = "Edge"
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trackbar_name = "Threshold"
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# the callback on the trackbar
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def on_trackbar(position):
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cv.Smooth(gray, edge, cv.CV_BLUR, 3, 3, 0)
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cv.Not(gray, edge)
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# run the edge dector on gray scale
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cv.Canny(gray, edge, position, position * 3, 3)
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# reset
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cv.SetZero(col_edge)
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# copy edge points
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cv.Copy(im, col_edge, edge)
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# show the im
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cv.ShowImage(win_name, col_edge)
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if __name__ == '__main__':
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if len(sys.argv) > 1:
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im = cv.LoadImage( sys.argv[1], cv.CV_LOAD_IMAGE_COLOR)
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else:
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url = 'http://code.opencv.org/svn/opencv/trunk/opencv/samples/c/fruits.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.DecodeImage(imagefiledata, cv.CV_LOAD_IMAGE_COLOR)
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# create the output im
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col_edge = cv.CreateImage((im.width, im.height), 8, 3)
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# convert to grayscale
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gray = cv.CreateImage((im.width, im.height), 8, 1)
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edge = cv.CreateImage((im.width, im.height), 8, 1)
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cv.CvtColor(im, gray, cv.CV_BGR2GRAY)
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# create the window
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cv.NamedWindow(win_name, cv.CV_WINDOW_AUTOSIZE)
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# create the trackbar
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cv.CreateTrackbar(trackbar_name, win_name, 1, 100, on_trackbar)
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# show the im
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on_trackbar(0)
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# wait a key pressed to end
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cv.WaitKey(0)
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