A Page Content Independent Book Dewarping Method to Handle 2D Images Captured by a Digital Camera

摘要

In this paper, we propose a coordinate transform model to rectify both the perspective and surface curving distortions of a book image, which is captured by a 2D digital camera. The rectification process includes three steps: 1) detect the boundary of a curved page on a book image; 2) knowing the four boundary curves of a book page should be mapped to the four sides of a rectangle, we build up the correspondence between a pixel inside the book page and a pixel inside the rectangle; 3) fill each pixel in the rectangle with its correspondence pixel on the book image, we get a rectangle which is the dewarped page we want. The experimental results show the effectiveness of the proposed rectification approach.