Enlargement and reduction of image/video via discrete cosine transform pair, part 2: Reduction

Shu Mei Guo, Chen Bang Li, Chia Wei Chen, Yueh Ching Liao, Jason Sheng Hong Tsai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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, 1s 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.

Original languageEnglish
Article number043007
JournalJournal of Electronic Imaging
Issue number4
Publication statusPublished - 2007

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Computer Science Applications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Enlargement and reduction of image/video via discrete cosine transform pair, part 2: Reduction'. Together they form a unique fingerprint.

Cite this