ABSTRACT The article describes a novel visual information concealment technique, referred to as optical watermarking, for the authentication of original printed documents. An optical watermark is a two-dimensional binary image. The optical watermark is constructed by the superposition of multiple

Abstract: In this paper, we propose an approach to estimate the text skew for printed documents. This is an important step to prevent errors in further stages of an automatic document processing system (as text segmentation). Our approach is based on the statistical analysis of the height

This paper presents a new technique for dealing with broken characters, one of the major challenges in the optical character recognition (OCR) of degraded historical printed documents. A technique based on graph combinatorics is used to rejoin the appropriate connected components. It has been

This paper presents a text/graphic labelling for ancient printed documents. Our approach is based on the extraction and the quantification of the various orientations that are present in ancient printed document images. The documents are initially cut into normalized square windows in which we

. One such experiment is the use of the existing more pervasive television broadcast networks to broadcast printable data that can be printed off the television with a simple device that interfaces between the

Este artículo pretende dar una visión global de las fuentes documentales que podemos utilizar a la hora de realizar un trabajo científico dentro del campo de la deficiencia mental. Se proporciona el acceso a dichas fuentes documentales y/o la referencia de los documentos seleccionados. Para ello, se propone una clasificación de las fuentes documentales, con el fin de organizar y sistematizar el artículo. Palabras clave: Documento, documentación científica, fuentes documentales, bases de datos, centros de documentación.

Abstract—in this paper, we present our work about the extraction and separation of words from bilingual printed document. This approach is based on the structuring element of the morphological dilation. We report results for Arabic, Latin and bilingual Arabic-Latin scripts and we show its

Rub, fold, and abrasion resistance testing of digitally printed documents

Despite the increase in email and other forms of digital communication, the use of printed documents continues to increase every year. Many types of printed documents need to be “secure ” or traceable to the printer that was used to print them. Examples of these include identity documents (e

Abstract. Based on the study of the specificity of historical printed books and on the main error sources of classical methods of page layout analysis, this paper presents a new way to achieve an indexation of ancient printed documents. We have developed an approach based on the extraction