Nous appliquons cette méthode sur un ensemble d'image de documents arabes anciens rotées manuellement à différents angles.

Dans cet article nous présentons une méthode simple et efficace de correction de l'inclinaison basée sur la projection horizontale partielle. La correction d'inclinaison de l'écriture dans les images de documents est un processus important dans les systèmes d'analyse et de reconnaissance de l'écriture. In order to evaluate the concept, we also add a user-friendly manual alignment of paper position on the underlying tablet computer The evaluation demonstrates that the system achieves almost perfect digitisation of strokes (98.6% of strokes were correctly registered with only 1.2% of ghost strokes) whilst maintaining excellent user experience of writing with a pencil on the paper. Moreover, the stylus also allows simultaneous digitisation of handwritten information on the paper when the paper is placed on the tablet screen. The stylus can be used for writing on a physical paper, while it still maintains all the features needed for tablet interaction. The Hybrid Stylus is assembled with the infinity pencil tip (nib) made of graphite and a specially designed shielded tip holder that is attached to an active stylus. In this paper, we present the design, fabrication and evaluation of the Hybrid Stylus. Despite the plethora of concepts, prototypes and systems to digitise handwritten information on paper, these systems require specially prepared paper, complex setups and software, which can be used solely in combination with paper, and, most importantly, do not support the concurrent precise interaction with both mediums (paper and touchscreen) using one pen only. Because digital medium also provides several advantages not available to physical paper, there is a clear benefit to merge the two mediums. This is so much so, that some pen–paper interaction has been imitated in the digital world with touchscreens and stylus pens. The distinct properties and affordances of paper provide benefits that enabled paper to maintain an important role in the digital age.

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