mirror of
https://github.com/opencv/opencv.git
synced 2024-12-01 23:30:06 +08:00
65 lines
1.5 KiB
Python
Executable File
65 lines
1.5 KiB
Python
Executable File
#! /usr/bin/env python
|
|
|
|
print "OpenCV Python version of edge"
|
|
|
|
import sys
|
|
|
|
# import the necessary things for OpenCV
|
|
from opencv import cv
|
|
from opencv import highgui
|
|
|
|
# some definitions
|
|
win_name = "Edge"
|
|
trackbar_name = "Threshold"
|
|
|
|
# the callback on the trackbar
|
|
def on_trackbar (position):
|
|
|
|
cv.cvSmooth (gray, edge, cv.CV_BLUR, 3, 3, 0)
|
|
cv.cvNot (gray, edge)
|
|
|
|
# run the edge dector on gray scale
|
|
cv.cvCanny (gray, edge, position, position * 3, 3)
|
|
|
|
# reset
|
|
cv.cvSetZero (col_edge)
|
|
|
|
# copy edge points
|
|
cv.cvCopy (image, col_edge, edge)
|
|
|
|
# show the image
|
|
highgui.cvShowImage (win_name, col_edge)
|
|
|
|
if __name__ == '__main__':
|
|
filename = "../c/fruits.jpg"
|
|
|
|
if len(sys.argv)>1:
|
|
filename = sys.argv[1]
|
|
|
|
# load the image gived on the command line
|
|
image = highgui.cvLoadImage (filename)
|
|
|
|
if not image:
|
|
print "Error loading image '%s'" % filename
|
|
sys.exit(-1)
|
|
|
|
# create the output image
|
|
col_edge = cv.cvCreateImage (cv.cvSize (image.width, image.height), 8, 3)
|
|
|
|
# convert to grayscale
|
|
gray = cv.cvCreateImage (cv.cvSize (image.width, image.height), 8, 1)
|
|
edge = cv.cvCreateImage (cv.cvSize (image.width, image.height), 8, 1)
|
|
cv.cvCvtColor (image, gray, cv.CV_BGR2GRAY)
|
|
|
|
# create the window
|
|
highgui.cvNamedWindow (win_name, highgui.CV_WINDOW_AUTOSIZE)
|
|
|
|
# create the trackbar
|
|
highgui.cvCreateTrackbar (trackbar_name, win_name, 1, 100, on_trackbar)
|
|
|
|
# show the image
|
|
on_trackbar (0)
|
|
|
|
# wait a key pressed to end
|
|
highgui.cvWaitKey (0)
|