提取文字、图形的轮廓，将它们投影到曲面上矢量化，得到曲线多边形。
Contours of letters and images were extracted and projected into a curved surface, and curvilinear polygons were acquired by vectorization.
提取文字、图形的轮廓，将它们投影到曲面上矢量化，得到曲线多边形。
Contours of letters and images were extracted and projected into a curved surface, and curvilinear polygons were acquired by vectorization.
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