python openCV自制绘画板

本文实例为大家分享了python openCV自制绘画板的具体代码，供大家参考，具体内容如下

import numpy as npimport cv2def nothing(x): passcv2.namedWindow(’image’)img = np.zeros((512,512,3),np.uint8)cv2.createTrackbar(’R’,’image’,0,255,nothing)cv2.createTrackbar(’G’,’image’,0,255,nothing)cv2.createTrackbar(’B’,’image’,0,255,nothing)drawing = Falsemode = Trueix,iy = -1,-1def drawing_fragment(event,x,y,flags,param): r = cv2.getTrackbarPos(’R’,’image’) g = cv2.getTrackbarPos(’G’,’image’) b = cv2.getTrackbarPos(’B’,’image’) color = (b,g,r) global drawing,ix,iy,mode if event == cv2.EVENT_LBUTTONDOWN: drawing = True ix = x iy = y elif event == cv2.EVENT_MOUSEMOVE: if drawing: if mode:cv2.rectangle(img,(ix,iy),(x,y),color,-1) else:cv2.circle(img,(x,y),5,color,-1) elif event == cv2.EVENT_LBUTTONUP: drawing = Falsecv2.setMouseCallback(’image’,drawing_fragment)while True: cv2.imshow(’image’,img) k = cv2.waitKey(2) if k == 27: break elif k == ord(’q’): mode = not modecv2.destroyAllWindows()

测试效果

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