1.matlab 中poly2mask  方法

        x = [70 222 280 330 467 358 392 280 138 195]；

        y = [190 190 61 190 190 260 380 308 380 260]；

        bw = poly2mask(x,y,256,256)

        imshow(bw)
        hold on
        plot(x,y,'b','LineWidth',1)
        hold off

 2.在python 中实现 

        x = [70,222,280,330,467,358,392,280,138,195]

        y = [190,190,61,190,190,260,380,308,380,260]

        cor_xy = np.vstack((x, y)).T

        cv2.polylines(img,[cor_xy],True,1,1)

        cv2.fillPoly(img, [cor_xy], 1)

        cv2.imshow('image.com',img)

        cv2.waitKey()