Space variant resolution ADCT still image coding

1991 ◽  
Vol 2 (3) ◽  
pp. 299-304 ◽  
Author(s):  
Mario Alessandro Imperato ◽  
Giovanni Jacovitti ◽  
Alessandro Neri
Keyword(s):  
Image Coding ◽  
Still Image ◽  
Space Variant

scholarly journals Non-linear contour-based multidirectional intra coding

2018 ◽  
Vol 7 ◽  
Author(s):  
Thorsten Laude ◽  
Jan Tumbrägel ◽  
Marco Munderloh ◽  
Jörn Ostermann
Keyword(s):  
Model Selection ◽  
Image Coding ◽  
Reference Area ◽  
Selection Algorithm ◽  
Still Image ◽  
Intra Coding ◽  
Coding Efficiency ◽  
Contour Model ◽  
Non Linear ◽  
Contour Models

AbstractIntra coding is an essential part of all video coding algorithms and applications. Additionally, intra coding algorithms are predestined for an efficient still image coding. To overcome limitations in existing intra coding algorithms (such as linear directional extrapolation, only one direction per block, small reference area), we propose non-linear Contour-based Multidirectional Intra Coding. This coding mode is based on four different non-linear contour models, on the connection of intersecting contours and on a boundary recall-based contour model selection algorithm. The different contour models address robustness against outliers for the detected contours and evasive curvature changes. Additionally, the information for the prediction is derived from already reconstructed pixels in neighboring blocks. The achieved coding efficiency is superior to those of related works from the literature. Compared with the closest related work, BD rate gains of 2.16% are achieved on average.

JPEG 2000 still image coding versus other standards

2000 ◽  
Author(s):  
Diego Santa-Cruz ◽  
Touradj Ebrahimi ◽  
Joel Askelof ◽  
Mathias Larsson ◽  
Charilaos A. Christopoulos
Keyword(s):  
Image Coding ◽  
Jpeg 2000 ◽  
Still Image

AN IMPROVED EMBEDDED ZEROTREE WAVELET IMAGE CODING METHOD BASED ON COEFFICIENT PARTITIONING USING MORPHOLOGICAL OPERATION

2000 ◽  
Vol 14 (06) ◽  
pp. 795-807 ◽  
Author(s):  
JUNMEI ZHONG ◽  
C. H. LEUNG ◽  
Y. Y. TANG
Keyword(s):  
Image Compression ◽  
Video Coding ◽  
Image Coding ◽  
Experimental Results ◽  
Morphological Operation ◽  
Compression Algorithms ◽  
Still Image ◽  
Coding Method ◽  
Wavelet Image ◽  
Image Compression Algorithm

In recent years, wavelets have attracted great attention in both still image compression and video coding, and several novel wavelet-based image compression algorithms have been developed so far, one of which is Shapiro's embedded zerotree wavelet (EZW) image compression algorithm. However, there are still some deficiencies in this algorithm. In this paper, after the analysis of the deficiency in EZW, a new algorithm based on quantized coefficient partitioning using morphological operation is proposed. Instead of encoding the coefficients in each subband line-by-line, regions in which most of the quantized coefficients are significant are extracted by morphological dilation and encoded first. This is followed by using zerotrees to encode the remaining space which has mostly zeros. Experimental results show that the proposed algorithm is not only superior to the EZW, but also compares favorably with the most efficient wavelet-based image compression algorithms reported so far.

A Novel Rate Control Method for Still Image Coding

2019 ◽  
Author(s):  
Zheng-Teng Zhang ◽  
Ruidong Fang ◽  
Jucai Lin ◽  
Jun Yin ◽  
Xingming Zhang
Keyword(s):  
Image Coding ◽  
Rate Control ◽  
Control Method ◽  
Still Image

scholarly journals Application of Content Specific Dictionaries in Still Image Coding

2015 ◽  
Vol E98.D (2) ◽  
pp. 394-403
Author(s):  
Jigisha N PATEL ◽  
Jerin JOSE ◽  
Suprava PATNAIK
Keyword(s):  
Image Coding ◽  
Still Image
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