Title :
Optimal JPEG decoding
Author :
Jung, J. ; Antonini, M. ; Barlaud, M.
Author_Institution :
Univ. de Nice-Sophia Antipolis, Valbonne, France
Abstract :
This paper introduces an optimal decoding scheme for the baseline Joint Photographers Expert Group (JPEG) standard. In particular, it deals with the minimization of a half-quadratic criterion which takes into account observed data, a priori knowledge of the solution, and precise spatial location of blocking artifacts. The method considers, at the same time, information in the original spatial domain, in the DCT domain, and in the spatio-frequency (DWT) domain. A model of the quantizer is also included. The method reduces blocking and ringing artifacts, resulting in improved peak signal-to-noise ratio performance as well as greater visual quality
Keywords :
code standards; data compression; decoding; discrete cosine transforms; discrete wavelet transforms; image coding; image reconstruction; minimisation; quantisation (signal); telecommunication standards; transform coding; DCT domain; DWT; JPEG standard; Joint Photographers Expert Group; PSNR performance; blocking artifacts reduction; discrete wavelet transform; half-quadratic criterion minimization; optimal JPEG decoding; peak signal-to-noise ratio; reconstruction algorithm; ringing artifacts reduction; spatial domain; spatial location; spatio-frequency domain; still image compression; visual quality; Bit rate; Decoding; Discrete cosine transforms; Filtering; Image reconstruction; Laboratories; Noise reduction; PSNR; Quantization; Transform coding;
Conference_Titel :
Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-8821-1
DOI :
10.1109/ICIP.1998.723513
