Feature extraction capability of some discrete transforms
Ja‐Ling Wu, Wei-Jou Duh · 1991
The feature extraction capability of discrete cosine transform (DCT), Walsh-Hadamard transform (WHT), discrete Hartley transform (DHT) and their sign transformations are investigated and compared for the recognition of two-dimensional binary patterns. It is shown that the noise immunity of the transform-based feature extraction is rather promising.>