Study on Template-Based Coding Method of Binary OCR Table Image

The binary image is commonly found with a lower compression ratio in lossless coding, for which a template-based coding method was employed in the coding of the OCR table images. Specifically, a template image was first established in the same context of the table image, followed by segmentation of the table image. Secondly, the deviation between the table image and the template image was used for rotation and translation to eliminate post-synthesis mismatch. Finally, adaptive arithmetic coding was introduced in the coding of the foreground image in the table image. In decoding, the template image and the foreground image are required to be synthesized. Experiments proved that the method used for the coding of binary OCR table images may have a higher compression ratio than the common coding method.