Book surface reconstruction and image correction with a stereo vision system

摘要

In this paper, we propose a reconstruction and correction method for paper documents with curved surfaces or fold lines using a stereo vision system. Characters in images of thick book's pages acquired with an image scanner are difficult to recognize because they are deformed under the influence of curved surface. In our method, the 3D shape reconstruction of the book's surface is executed from the result of the stereoscopic measurement by putting the book upward, and a flat surface is recovered from the curved surface. The validity of the proposed method is shown through experiments.