Papers that
reference this paper.
A Fast DCT Block Smoothing Algorithm
Rensheng Horng & A. J. Ahumada Jr.
(1995)
Visual Communication and Image Processing Annual Meeting Proceedings,
SPIE Vol. 2501, Paper 5, 1995.
PostScript Version
Abstract
Image compression based on quantizing the image in the discrete
cosine transform (DCT) domain can generate blocky artifacts in
the output image. It is possible to reduce these artifacts and
RMS error by adjusting measures of block edginess and image
roughness, while restricting the DCT coefficient values to values
that would have been quantized to those of the compressed image.
This paper presents a fast algorithm to replace our gradient
search method for RMS error reduction and image smoothing after
adjustment of DCT coefficient amplitude.
Keywords:
discrete cosine transform, image compression, artifact
reduction, blocking artifacts, image smoothing.