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All phase biorthogonal transform and its application in JPEG-like image compression / Zheng-Xin Hou in Signal processing. Image communication, Vol. 24 N° 10 (Novembre 2009) 

Public ISBD [article]  in Signal processing. Image communication > Vol. 24 N° 10 (Novembre 2009) . - pp. 791-802 Titre : All phase biorthogonal transform and its application in JPEG-like image compression Type de document : texte imprimé Auteurs : Zheng-Xin Hou, Auteur ; Cheng-You Wang, Auteur ; Ai-Ping Yang, Auteur Article en page(s) : pp. 791-802 Note générale : Electronique Langues : Anglais (eng) Mots-clés : Biorthogonal  transform  Image  compression  JPEG  algorithm  All  phase  biorthogonal  transform  (APBT)  Dual  biorthogonal  basis  vectors  Walsh  transform  (WT)  Discrete  cosine  transform  (DCT)  Inverse  discrete  cosine  transform  (IDCT)  Peak  signal  to  noise  ratio  (PSNR) Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs Résumé : This paper proposes new concepts of the all phase biorthogonal transform (APBT) and the dual biorthogonal basis vectors. In the light of all phase digital filtering theory, three kinds of all phase biorthogonal transforms based on the Walsh transform (WT), the discrete cosine transform (DCT) and the inverse discrete cosine transform (IDCT) are proposed. The matrices of APBT based on WT, DCT and IDCT are deduced, which can be used in image compression instead of the conventional DCT. Compared with DCT-based JPEG (DCT-JPEG) image compression algorithm at the same bit rates, the PSNR and visual quality of the reconstructed images using these transforms are approximate to DCT, outgoing DCT-JPEG at low bit rates especially. But the advantage is that the quantization table is simplified and the transform coefficients can be quantized uniformly. Therefore, the computing time becomes shorter and the hardware implementation easier. DEWEY : 361.382 ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%23 [...] [article] All phase biorthogonal transform and its application in JPEG-like image compression [texte imprimé] / Zheng-Xin Hou, Auteur ; Cheng-You Wang, Auteur ; Ai-Ping Yang, Auteur . - pp. 791-802. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 24 N° 10 (Novembre 2009) . - pp. 791-802 Mots-clés : Biorthogonal  transform  Image  compression  JPEG  algorithm  All  phase  biorthogonal  transform  (APBT)  Dual  biorthogonal  basis  vectors  Walsh  transform  (WT)  Discrete  cosine  transform  (DCT)  Inverse  discrete  cosine  transform  (IDCT)  Peak  signal  to  noise  ratio  (PSNR) Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs Résumé : This paper proposes new concepts of the all phase biorthogonal transform (APBT) and the dual biorthogonal basis vectors. In the light of all phase digital filtering theory, three kinds of all phase biorthogonal transforms based on the Walsh transform (WT), the discrete cosine transform (DCT) and the inverse discrete cosine transform (IDCT) are proposed. The matrices of APBT based on WT, DCT and IDCT are deduced, which can be used in image compression instead of the conventional DCT. Compared with DCT-based JPEG (DCT-JPEG) image compression algorithm at the same bit rates, the PSNR and visual quality of the reconstructed images using these transforms are approximate to DCT, outgoing DCT-JPEG at low bit rates especially. But the advantage is that the quantization table is simplified and the transform coefficients can be quantized uniformly. Therefore, the computing time becomes shorter and the hardware implementation easier. DEWEY : 361.382 ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%23 [...]