PT Unknown
AU Albert Gordo
   Ernest Valveny
TI A rotation invariant page layout descriptor for document classification and retrieval
BT 10th International Conference on Document Analysis and Recognition
PY 2009
BP 481–485
DI 10.1109/ICDAR.2009.110
AB Document classification usually requires of structural features such as the physical layout to obtain good accuracy rates on complex documents. This paper introduces a descriptor of the layout and a distance measure based on the cyclic dynamic time warping which can be computed in O(n2). This descriptor is translation invariant and can be easily modified to be scale and rotation invariant. Experiments with this descriptor and its rotation invariant modification are performed on the Girona archives database and compared against another common layout distance, the minimum weight edge cover. The experiments show that these methods outperform the MWEC both in accuracy and speed, particularly on rotated documents.
ER