mirror of
https://github.com/opencv/opencv.git
synced 2024-12-15 18:09:11 +08:00
49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
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()
|