透视文本图像的灭点快速探测

Vanishing Points Fast Detection of Perspective Document Image

提出了一种透视文本图像水平和垂直灭点的快速探测方法.使用一维线性搜索可以快速确定可能邻近水平灭点区域的两个方位角,用二维线性搜索探测到水平灭点.在探测到水平灭点的基础上,根据最小投影轮廓宽度原理,仅对该宽度可能有贡献的像素进行投影,可以快速探测到垂直灭点.试验结果表明,该方法是有效的.

A fast detection method for horizontal and vertical vanishing points of perspective document image was proposed. One-dimensional linear search was used in order to determine quickly two azimuth angles which might near by the horizontal vanishing point, then two-dimensional linear search was used to detect the horizontal vanishing point. Based on horizontal vanishing point detected and the principle of minimum projection profile width, the vertical vanishing point could be detected quickly by projecting only pixels that might contribute to the width. The experimental result shows that the method is efficient.