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samples/python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py
48 строк
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Alexander Alekhin
samples: use findFile() in "python"
16 ноя 2018, 21:08
16 ноя 2018, 21:08
c371df4
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О чём код?
from __future__ import print_function from __future__ import division import cv2 as cv import argparse alpha_slider_max = 100 title_window = 'Linear Blend' ## [on_trackbar] def on_trackbar(val): alpha = val / alpha_slider_max beta = ( 1.0 - alpha ) dst = cv.addWeighted(src1, alpha, src2, beta, 0.0) cv.imshow(title_window, dst) ## [on_trackbar] parser = argparse.ArgumentParser(description='Code for Adding a Trackbar to our applications tutorial.') parser.add_argument('--input1', help='Path to the first input image.', default='LinuxLogo.jpg') parser.add_argument('--input2', help='Path to the second input image.', default='WindowsLogo.jpg') args = parser.parse_args() ## [load] # Read images ( both have to be of the same size and type ) src1 = cv.imread(cv.samples.findFile(args.input1)) src2 = cv.imread(cv.samples.findFile(args.input2)) ## [load] if src1 is None: print('Could not open or find the image: ', args.input1) exit(0) if src2 is None: print('Could not open or find the image: ', args.input2) exit(0) ## [window] cv.namedWindow(title_window) ## [window] ## [create_trackbar] trackbar_name = 'Alpha x %d' % alpha_slider_max cv.createTrackbar(trackbar_name, title_window , 0, alpha_slider_max, on_trackbar) ## [create_trackbar] # Show some stuff on_trackbar(0) # Wait until user press some key cv.waitKey()