Active Rectification of Curved Document Images Using Structured Beams

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• 作者：Gaofeng Meng ; Shiming Xiang ; Chunhong Pan…
• 关键词：Document image processing ; Document dewarping ; Geometric correction ; Photometric correction ; Structured light
• 刊名：International Journal of Computer Vision
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：122
• 期：1
• 页码：34-60
• 全文大小：
• 刊物类别：Computer Science
• 刊物主题：Computer Imaging, Vision, Pattern Recognition and Graphics; Artificial Intelligence (incl. Robotics); Image Processing and Computer Vision; Pattern Recognition;
• 出版者：Springer US
• ISSN：1573-1405
• 卷排序：122

文摘

We propose an active method to rectify the geometric and photometric distortions in a document image. This method uses structured beams projected upon the curved document page to recover the spatial curves on it. A developable surface is interpolated to the curves by finding the correspondence between them. To correct the geometric distortion, the estimated developable surface is finally flattened onto a plane by explicitly solving a system of ordinary differential equations. The recovered 3D page shape, together with a Lambertian illumination model as guidance, is further used to rectify the non-uniform illumination in the images. Experimental results based on a variety of synthetic and real-captured document images demonstrate the effectiveness and efficiency of the proposed method.