Title :
Frequency domain post-processing technique based on POCS
Author :
Kim, Yoon ; Park, Chun-Su ; Ko, Sung-Jea
Author_Institution :
Sch. of Electr. Eng., Korea Univ., Seoul, South Korea
Abstract :
A novel post-processing technique in the DCT domain, based on the theory of the projection onto convex sets (POCS), to reduce the blocking artifacts in the block discrete cosine transform (BDCT)-coded images, is proposed. Computer simulation results indicate that the proposed scheme performs better than conventional post-processing algorithms. Furthermore, the proposed algorithm can be implemented without DCT/IDCT operations. Estimates of computation savings vary between 41 and 64% depending on the task.
Keywords :
block codes; data compression; discrete cosine transforms; frequency-domain analysis; image coding; set theory; DCT domain; POCS; block DCT coded images; block discrete cosine transform; blocking artifacts reduction; frequency domain post-processing technique; image compression techniques; projection onto convex sets;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20031025
