滑动轨迹栏作调色板
cv.createTrackbar(‘R’, ‘image’, 0, 255, nothing)
参数：哪个滑动轨迹栏，哪个窗口，最小值，最大值，回调函数
cv.getTrackbarPos(‘R’, ‘image’)
参数：轨迹栏名，窗口名文章来源：https://www.toymoban.com/news/detail-708764.html
import numpy as np
import cv2 as cv
def nothing(x):
pass
img = np.zeros((600, 512, 3), np.uint8)
cv.namedWindow('image', 0)
cv.createTrackbar('R', 'image', 0, 255, nothing)
cv.createTrackbar('G', 'image', 0, 255, nothing)
cv.createTrackbar('B', 'image', 0, 255, nothing)
switch = 'OFF : ON'
cv.createTrackbar(switch, 'image', 0, 1, nothing)
while(1):
cv.imshow('image', img)
k = cv.waitKey(1) & 0xFF
if k == 27:
break
r = cv.getTrackbarPos('R', 'image')
g = cv.getTrackbarPos('G', 'image')
b = cv.getTrackbarPos('B', 'image')
s = cv.getTrackbarPos(switch, 'image')
if s == 0:
img[:] = 0
else:
img[:] = [b, g, r] # *****************
cv.destroyAllWindows()
文章来源地址https://www.toymoban.com/news/detail-708764.html
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