针对文档图像的倾斜校正问题，提出了一种新的基于投影的文档图像倾斜角检测方法。

Aiming at the skew correction of document image, a novel skew correction method based on projection is proposed.

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同时区分了刀刃在坐标平面上的投影角和刀面相对坐标平面的倾斜角，并用实例计算说明这两种角度有时差值较大。

Difference between the angles of edge projections and the angles of the intersections of surfaces and coordinate planes are raised in this paper.

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