OpenCV カラーパレットとしてのトラックバー
トラックバーの使用例
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | import cv2 import numpy as np def nothing(x): pass # Create a black image, a window img = np.zeros((300,512,3), np.uint8) cv2.namedWindow('image') # create trackbars for color change cv2.createTrackbar('R','image',0,255,nothing) cv2.createTrackbar('G','image',0,255,nothing) cv2.createTrackbar('B','image',0,255,nothing) # create switch for ON/OFF functionality switch = '0 : OFF \n1 : ON' cv2.createTrackbar(switch, 'image',0,1,nothing) while(1): cv2.imshow('image',img) k = cv2.waitKey(1) & 0xFF if k == 27: break # get current positions of four trackbars r = cv2.getTrackbarPos('R','image') g = cv2.getTrackbarPos('G','image') b = cv2.getTrackbarPos('B','image') s = cv2.getTrackbarPos(switch,'image') if s == 0: img[:] = 0 else: img[:] = [b,g,r] cv2.destroyAllWindows() |
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