Title :
Rectifying the bound document image captured by the camera: a model based approach
Author :
Cao, Huaigu ; Ding, Xiaoqing ; Liu, Changsong
Author_Institution :
Electron. Eng. Dept., Tsinghua Univ., Beijing, China
Abstract :
A model based approach for rectifying the camera image of the bound document has been developed, i.e., the surface of the document is represented by a general cylindrical surface. The principle of using the model to unwrap the image is discussed. Practically, the skeleton of each horizontal text line is extracted to help estimate the parameter of the model, and rectify the images. To use the model, only a few priori is required, and no more auxiliary device is necessary. Experiment results are given to demonstrate the feasibility and the stability of the method.
Keywords :
document image processing; feature extraction; image reconstruction; image thinning; bound document image; camera image; document image capture; general cylindrical surface; horizontal text line; image formation process; image warping; model based approach; Books; Digital cameras; Glass; Image segmentation; Parameter estimation; Rough surfaces; Skeleton; Surface emitting lasers; Surface roughness; Text analysis;
Conference_Titel :
Document Analysis and Recognition, 2003. Proceedings. Seventh International Conference on
Print_ISBN :
0-7695-1960-1
DOI :
10.1109/ICDAR.2003.1227630
