Title :
Image coding using Periodic Walsh Piecewise-Linear transform
Author :
Belgassem, Fituri H.
Author_Institution :
Commun. Eng. Dept., Higher Inst. of Electron., Beni Walid, Libya
Abstract :
The analysis of image coding using Periodic Walsh Piecewise-Linear (PWL) transform will be presented in this paper. The coding method employs an integer bit allocation scheme and Llyod-Max quantizers. Experimental results have shown that best results are obtained by modeling the DC coefficient using a one-sided Gaussian distribution and the AC coefficients by using a Laplacian distribution. Comparison of coding real images using the periodic Walsh piecewise-linear transform and some orthogonal transforms will be given. Computer simulation results indicate that the image coding efficiency of the periodic Walsh piecewise-linear transform is close to that of Walsh and Haar transforms from the PSNR viewpoint.
Keywords :
Gaussian distribution; Laplace transforms; Walsh functions; data compression; frequency allocation; image coding; piecewise linear techniques; transform coding; Gaussian distribution; Laplacian distribution; Llyod-Max quantizers; image coding; integer bit allocation scheme; periodic Walsh piecewise-linear transform; periodic coding; Bit rate; Compaction; Data compression; Image coding; Image processing; Image storage; PSNR; Piecewise linear techniques; Pixel; Transform coding; Digital image processing; image coding; transform coding;
Conference_Titel :
Multimedia Computing and Systems, 2009. ICMCS '09. International Conference on
Conference_Location :
Ouarzazate
Print_ISBN :
978-1-4244-3756-6
Electronic_ISBN :
978-1-4244-3757-3
DOI :
10.1109/MMCS.2009.5256699
