Python使用Trackbar实现绘图板示例-创新互联
今天就跟大家聊聊有关Python使用Trackbar实现绘图板示例,可能很多人都不太了解,为了让大家更加了解,小编给大家总结了以下内容,希望大家根据这篇文章可以有所收获。
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import cv2 import numpy as np drawing = False mode = True ix, iy = -1, -1 def nothing(x): pass def draw_circle(event,x,y,flags,param): r = cv2.getTrackbarPos('R','image') g = cv2.getTrackbarPos('G','image') b = cv2.getTrackbarPos('B','image') color = (b,g,r) s = cv2.getTrackbarPos('eraser','image') if s == 1: color = (255,255,255) thin = cv2.getTrackbarPos('thin','image') global ix,iy,drawing,mode if event == cv2.EVENT_LBUTTONDOWN: drawing = True ix,iy = x,y elif event == cv2.EVENT_MOUSEMOVE and flags == cv2.EVENT_FLAG_LBUTTON: if drawing == True: if mode == True: cv2.rectangle(img, (ix,iy),(x,y),color,-1) else: cv2.circle(img,(x,y),thin,color,-1) elif event == cv2.EVENT_LBUTTONUP: drawing == False img = np.zeros((512,512,3), np.uint8) img[:] = 255 cv2.namedWindow('image') cv2.createTrackbar('R','image',0,255,nothing) cv2.createTrackbar('G','image',0,255,nothing) cv2.createTrackbar('B','image',0,255,nothing) cv2.createTrackbar('eraser','image',0,1,nothing) cv2.createTrackbar('thin','image',1,50,nothing) cv2.setMouseCallback('image', draw_circle) while(1): cv2.imshow('image',img) k = cv2.waitKey(1) & 0xFF if k == ord('m'): mode = not mode elif k == 27: break
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