Paper
16 September 1996 Parameter estimation in regularized reconstruction of BDCT compressed images for reducing blocking artifacts
Author Affiliations +
Abstract
High compression ratios for both still images and sequences of images are usually achieved by discarding information represented by block discrete cosine transform (BDCT) coefficients which is considered unimportant. This compression procedure yields images that exhibit annoying block artifacts. In this paper we examine the reconstruction of BDCT compressed images which results in the removal of the blocking artifact. The method we propose for the reconstruction of such images, is based on a hierarchical Bayesian approach. With such an approach image and degradation models are required. In addition, unknown hyperparameters, usually the noise and image variances, have to be estimated in advanced or simultaneously with the reconstructed image. We show how to introduce knowledge about these parameters into the reconstruction procedure. The proposed algorithm is tested experimentally.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Javier Mateos, Aggelos K. Katsaggelos, and Rafael Molina "Parameter estimation in regularized reconstruction of BDCT compressed images for reducing blocking artifacts", Proc. SPIE 2952, Digital Compression Technologies and Systems for Video Communications, (16 September 1996); https://doi.org/10.1117/12.251331
Lens.org Logo
CITATIONS
Cited by 2 scholarly publications.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Image compression

Reconstruction algorithms

Image quality

Distance measurement

Quantization

Virtual colonoscopy

Visualization

RELATED CONTENT

Perceptual wavelet scheme for image compression
Proceedings of SPIE (June 08 2001)
Multilayered image compression
Proceedings of SPIE (October 19 1998)
Evaluating the visual quality of watermarked images
Proceedings of SPIE (February 17 2006)

Back to Top