نتایج جستجو برای: image coding

تعداد نتایج: 494357  

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 1998
André Kaup Til Aach

An important issue in object-based image coding is the efficient description of image segments having an arbitrary shape. This paper outlines a solution to this task using basic principles of transform image coding that are generalized for the case of arbitrarily shaped image segments. The texture inside each region is successively approximated using two-dimensional (2-D) shape-independent basi...

1999
Takayuki NAKACHI Tatsuya FUJII Junji SUZUKI

In this paper, we propose an adaptive predictive coding method based on image segmentation for lossless compression. MAR (Multiplicative Autoregressive) predictive coding is an efficient lossless compression scheme. Predictors of the MAR model can be adapted to changes in the local image statistics due to its local image processing. However, the performance of the MAR method is reduced when app...

Journal: :CoRR 2015
Toshiyuki Kato Hideitsu Hino Noboru Murata

A large number of image super resolution algorithms based on the sparse coding are proposed, and some algorithms realize the multi-frame super resolution. In multi-frame super resolution based on the sparse coding, both accurate image registration and sparse coding are required. Previous study on multi-frame super resolution based on sparse coding firstly apply block matching for image registra...

Journal: :Journal of Electrical and Computer Engineering 2023

The wavelet transform is widely used in the task of hyperspectral image compression (HSIC). They have achieved outstanding performance a (HS) image, which has attracted great interest. However, based algorithm (HSICA) low-coding gain than other state art HSIC algorithms. To solve this problem, manuscript proposes curvelet algorithm. multiscale mathematical that represents curve and edges HS mor...

Journal: :J. Inf. Sci. Eng. 1996
Day-Fann Shen

Image transmission via packet switched networks has a significant impact on encoded image data. To develop an efficient image codec for packet video, the goals of image coding are redefined and formulated as an optimization problem. Guided by these goals, a set of design requirements and a new segmentation based coding technique is developed. This approach features region based motion estimatio...

Journal: :Sig. Proc.: Image Comm. 2000
Zhou Wang David Zhang Yinglin Yu

The fractal image compression technique models a natural image using a contractive mapping called fractal mapping in the image space. In this paper, we demonstrate that the fractal image coding algorithm is compatible with other image coding methods. In other words, we can encode only part of the image using fractal technique and model the remaining part using other algorithms. According to suc...

2015
Richa Goyal Sourav Garg

The paper presents a lossless image compression technique using the hybridization of two different entropy coding techniques. Initially data folding technique has been applied to the image. A row folding is applied on the image matrix followed by a column folding. Multiple iterations of this process is applied on the image. After completing the data folding process another entropy coding techni...

2000
Aaron Deever Sheila S. Hemami

Wavelet transform coeecients are deened by both a magnitude and a sign. While promising algorithms exist for eeciently coding the transform coeecient magnitudes 7, 13, 9, 8, 11], current wavelet image coding algorithms are not eecient at coding the sign of the transform coeecients. It is generally assumed that there is no compression gain to be obtained from entropy coding of the sign. Only rec...

2013
Ghadah Al-Khafaji Loay E. George

In this paper, a fast lossless image compression method is introduced for compressing medical images, it is based on splitting the image blocks according to its nature along with using the polynomial approximation to decompose image signal followed by applying run length coding on the residue part of the image, which represents the error caused by applying polynomial approximation. Then, Huffma...

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