1 October 1994 Generalized Chen transform: a fast transform for image compression
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Abstract
The computational procedure introduced by Chen, Smith, and Fralick is in widespread use for computing the discrete cosine transform. It is popular because of its simplicity-it is a cascade of smaller (2x 2) orthogonal transforms. We show ways to further exploit the simplicities of such procedures and introduce a new family of transform (the generalized Chen transform or GCT). One parameterization of the GCT is essentially optimal for image compression but has a lower computational cost than other transforms.
James D. Allen, "Generalized Chen transform: a fast transform for image compression," Journal of Electronic Imaging 3(4), (1 October 1994). https://doi.org/10.1117/12.181448
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