圖像處理練習
製作一個滑動條調色板,使用函數cv2.getTrackbarPos();cv2.creatTrackbar()
import cv2
import numpy as np
def nothing(x):
pass
img = np.zeros((300,512,3), np.uint8)
cv2.namedWindow('image')
”創建一個開關“
switch = '0:OFF\n1:ON'
cv2.createTrackbar(switch,'image',0,1,nothing)
”創建3個調色條“
cv2.createTrackbar('R','image',0,255,nothing)
cv2.createTrackbar('G','image',0,255,nothing)
cv2.createTrackbar('B','image',0,255,nothing)
while(1):
cv2.imshow('image', img)
k=cv2.waitKey(0)
if k == ord('q'):#按q鍵退出
break
”從調色條 獲取值“
r = cv2.getTrackbarPos('R','image')
g = cv2.getTrackbarPos('G','image')
b = cv2.getTrackbarPos('B','image')
”開關“
change = cv2.getTrackbarPos(switch, 'image')
if k == ord('s') and change == 1:
img[:]=[r,g,b]
cv2.destroyAllWindows()