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Online Handwriting recognition is a procedure
of a computer to detect and understand intelligible handwritten characters,
words, sentence or paragraph input from a touch sensitive or pen sensitive
input sources such as Pen tablets, PDA, touch-screens and other devices. The
movements of the pen tip may be sensed “on line”, but it is
comparatively difficult task to recognize with great accuracy because in case
of online handwriting only co-ordinate values are known to us. Handwriting
recognition principally entails optical character recognition. However, a
complete handwriting recognition system also handles pre-processing steps,
formatting, performs correct segmentation into characters, normalization and
finds the most plausible Characters and words. On-line handwriting recognition
involves the automatic conversion of text as it is written on a special
digitizer or PDA, where a sensor picks up the pen-tip movements as well as
pen-up/pen-down switching and covert into vectors or matrix form. This kind of
data is known as digital ink and can be regarded as a digital representation of
handwriting. The obtained signal is converted into letter codes which are
usable within computer and text-processing applications.

For online word
recognition there are some preprocessing steps. One of themost important
pre-processing steps is dehooking as because without dehooking of a handwritten
stroke perfect recognition is not possible. Only few workshas been done on dehooking
of online handwritten characters and words. Here a new algorithm is proposed
for dehooking of online handwritten characters and words. This algorithm can be
applied for any Indian as well as foreign languages. Here we tested the
algorithm on Bengali handwritten characters and words.

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of the paper is organized as follows, Section we contains the introduction of
online handwriting recognition, preprocessing steps of online handwriting
recognition and dehooking, Section II contain Bengali script and online data
collection, Section III contain the related work of dehooking process, Section
IV contain proposed methodology, Section V describes results and discussion,
Section VI contain the concludes research work with future directions. 

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