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In this paper we propose the discrete cosine transform (DCT) mod2 feature set, which utilizes polynomial coefficients derived from 2D DCT coefficients obtained from spatially neighboring blocks. Face verification results on the multi-session VidTIMIT database suggest that the DCT-mod2 feature set is superior (in terms of robustness to illumination direction changes and discrimination ability) to features...
The discrete cosine transform of type IV (DCT-IV) and corresponding discrete sine transform of type IV (DST-IV) have played key role in the efficient implementation of orthogonal lapped transforms and perfect reconstruction cosine-modulated filter banks such as the oddly stacked modified discrete cosine transform (MDCT) or equivalently, the modulated lapped transform (MLT). However, the DCT-IV and...
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