1 October 2007 Enlargement and reduction of image/video via discrete cosine transform pair, part 2: reduction
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Abstract
Based on the novel matrix representations of the forward three-dimensional (3-D) discrete cosine transform (DCT) and the inverse 3-D DCT, applications for reduction of sequence/image/video are proposed. The original sequence/image/video is divided into subunits, and then the reduction is implemented in the frequency-domain by DCT. Two efficient algorithms are presented in accordance with two kinds of reducing multiples, 1/s and o1/o2, respectively. The proposed algorithms significantly eliminate ripple and blocky effects. As a result, they can provide numerous applications in data compression as well. Simulation results show that proposed mechanisms enable good performances for reductions of sequences, images, and videos as expected.
© (2007) Society of Photo-Optical Instrumentation Engineers (SPIE)
Shu-Mei Guo, Shu-Mei Guo, Chen-Bang Li, Chen-Bang Li, Chia-Wei Chen, Chia-Wei Chen, Yueh-Ching Liao, Yueh-Ching Liao, Jason Sheng-Hong Tsai, Jason Sheng-Hong Tsai, } "Enlargement and reduction of image/video via discrete cosine transform pair, part 2: reduction," Journal of Electronic Imaging 16(4), 043007 (1 October 2007). https://doi.org/10.1117/1.2804712 . Submission:
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