Data Embedding into Characters

作者：Kise Koichi^*; Omachi Shinichiro; Uchida Seiichi; Iwamura Masakazu; Liwicki Marcus

来源：IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, 2015, E98D(1): 10-20.

DOI：10.1587/transinf.2014MUI0002

• data embedding
• character recognition
• handwriting
• supplementary information
• character design
• geometric invariant
• pen device

This paper reviews several trials of re-designing conventional communication medium, i.e., characters, for enriching their functions by using data-embedding techniques. For example, characters are redesigned to have better machine-readability even under various geometric distortions by embedding a geometric invariant into each character image to represent class label of the character. Another example is to embed various information into handwriting trajectory by using a new pen device, called a data-embedding pen. An experimental result showed that we can embed 32-bit information into a handwritten line of 5 cm length by using the pen device. In addition to those applications, we also discuss the relationship between data-embedding and pattern recognition in a theoretical point of view. Several theories tell that if we have appropriate supplementary information by data-embedding, we can enhance pattern recognition performance up to 100%.

• 出版日期2015-1