Reading #6: Protractor: A Fast and Accurate Gesture Recognizer (Li)

COMMENTS:

Sampath Jayarathna

SUMMARY:

This paper discusses Protractor, a gesture recognozer than is fast and requires little memory. The author begins by comparing template-based and parametric-based approaches to sketch recognition and notes the difficulties with both. Protractor uses a nearest neigbor approach that performs preprosessing to convert each gesture into a uniform vector representation. When compared to the $1 recognizer, Protrator resulted in a similar error rate but a faster processing time.



DISCUSSION:

Protractor is similar to the $1 recognizer except for its method of removing orientation noise. I can appreciate the fact that Protractor is fast and suitable for implementing on mobile devices. However, I wonder if the simplicity of the $1 recognizer doesn't still make it the more appealing choice.