Table 3.

Comparison of methods and results between the current study and two others.

Postures considered	Taken from the alphabet of the American sign language	Taken from the alphabet of the American sign language	Taken from the alphabet of the American sign language
Number of postures considered	10	12	12
Number of testing images per posture	1,000	20	1,000
Features used	Fourier descriptors	Oriented gesture descriptors	3D signature
Classifier used	k-NN	Normalized cross correlation	k-NN
Number of templates per posture	500	Not Provided	1
Number of users for the testing database	Multiple users	Not Provided	1 user
Overall recognition rate	87.9%	88.8%	93.88%