IMAGE PROCESSING, PATTERN RECOGNITION

A method for extracting watermarks from textured printed documents

V. V. Sergeev^ab, V. A. Fedoseev<sup>ab

a</sup> Samara State Aerospace University
^b Image Processing Systems Institute, Russian Academy of Sciences

Abstract: In this paper, we propose a method for extracting latent images (watermarks) embedded into a regular (two-dimensional quasi-periodical) texture of printed document image. The method includes the following steps: spectral analysis of the input image, synthesis of Gabor filter bank, multichannel Gabor filtering of the image that forms textural feature fields, and finally, multichannel segmentation of them. A number of examples show the operability and potential effectiveness of the method.

Keywords: printed document, regular texture, watermark, texture analysis, Gabor filter, segmentation.

Received: 05.09.2014