screencp.py 文件源码

def roi(img,vertices):
    # blank mask:
    mask = np.zeros_like(img)

    # filling pixels inside the polygon defined by "vertices" with the fill color
    cv2.fillPoly(mask, vertices, 255)

    # returning the image only where mask pixels are nonzero
    masked = cv2.bitwise_and(img, mask)
    return masked