OpenCV-Python 마우스 드로잉

3500 단어 OpenCV

참고 자료

  • Mouse as a Paint-Brush

  • 코드

    import cv2
    import numpy as np
    
    drawing = False #        ,   True,      
    mode = True # True    ,False   
    ix, iy = -1, -1 #           
    
    
    def draw_circle(event, x, y, flags, param):
        global ix, iy, drawing, mode
    
        if event == cv2.EVENT_LBUTTONDOWN:
            #         
            drawing = True
            ix, iy = x, y
    
        elif event == cv2.EVENT_MOUSEMOVE:
            #       
            if drawing == True:
                if mode == True:
                    cv2.rectangle(img, (ix, iy), (x, y), (0, 255, 0), -1)
                else:
                    cv2.circle(img, (x, y), 5, (0, 0, 255), -1)
    
        elif event == cv2.EVENT_LBUTTONUP:
            #         
            drawing = False
            if mode == True:
                cv2.rectangle(img, (ix, iy), (x, y), (0, 255, 0), -1)
            else:
                cv2.circle(img, (x, y), 5, (0, 0, 255), -1)
    
    
    img = np.zeros((512, 512, 3), np.uint8)
    cv2.namedWindow('image')
    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
    
    cv2.destroyAllWindows()

    효과

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