Self-Organizing Maps and Learning Vector Quantization forFeature Sequences
Neural Processing Letters
On How to Describe Shapes of Devanagari Characters and Use Them for Recognition
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
Segmentation of Handprinted Letter Strings Using a Dynamic Programming Algorithm
ICDAR '01 Proceedings of the Sixth International Conference on Document Analysis and Recognition
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This paper utilizes structural properties of those alphanumeric characters, which have variable writing units. Writing units reveal number, shape, size, order of stroke, and speed in writing. It uses a string of pen tip's positions and tangent angles of every consecutive point as a feature vector sequence of a stroke. We constructed a prototype recognizer that uses the "Dynamic Time Warping" (DTW) algorithm to align handwritten strokes with stored stroke templates and determine their similarity. Separate system is trained for original and preprocessed writing samples and achieved recognition rates of 85.87% and 88.59% respectively. This introduces novel real time handwriting recognition on Nepalese alphanumeric characters, which are independent of number of strokes, as well as their order.