Filters








196 Hits in 4.2 sec

Quadtree classification and TCQ image coding

B.A. Banister, T.R. Fischer
2001 IEEE transactions on circuits and systems for video technology (Print)  
A quadtree sorting procedure, similar to SPIHT, is used to explicitly form classes of wavelet coefficients. The classes are encoded using arithmetic and trellis-coded quantization.  ...  The resulting encoding algorithm offers consistent improvement over SPIHT performance due to the granular gain of the trellis code.  ...  Using YCrCb color space, a color image QTCQ compression algorithm was implemented.  ... 
doi:10.1109/76.894278 fatcat:qbsnq2jllrfrnfnqzvj6qyl7xy

Wavelet TCQ: submission to JPEG-2000

Philip J. Sementilli, Ali Bilgin, James H. Kasner, Michael W. Marcellin, Andrew G. Tescher
1998 Applications of Digital Image Processing XXI  
This paper describes the Wavelet Trellis Coded Quantization (WTCQ) algorithm submitted by SAIC and The University of Arizona to the JPEG-2000 standardization activity.  ...  The Joint Photographic Experts Group (JPEG) within the ISO international standards organization is defining a new standard for still image compression -JPEG-2000.  ...  of Trellis Coded Quantization 2.13 Entropy Coder: Variable length coding is used for lossless compression of the quantizer output indices.  ... 
doi:10.1117/12.323190 fatcat:xlbhazibmnce7g4v46unjjmjl4

Hyper-trellis decoding of pixel-domain Wyner-Ziv video coding

Arun Avudainayagam, John M. Shea, Dapeng Wu
2008 IEEE transactions on circuits and systems for video technology (Print)  
We present a new decoding algorithm for this application based on decoding on a hyper-trellis, in which multiple states of the original code trellis are combined.  ...  In this scheme, a video frame is encoded using a turbo code, and only a subset of the parity bits are sent to the decoder.  ...  Fig. 2 shows the regular trellis structure for the (1, 5/7) RSC code and the corresponding hyper-trellis for use in a Wyner-Ziv video codec with 2-bit quantization.  ... 
doi:10.1109/tcsvt.2008.918785 fatcat:a74rrtimqbdszenrizbd3jgcee

Rate-distortion optimized frame type selection for MPEG encoding

Jungwoo Lee, B.W. Dickinson
1997 IEEE transactions on circuits and systems for video technology (Print)  
At the same time, the quantization for each frame in a group of pictures is also optimized in an operational rate distortion sense.  ...  The optimal anchor frame separation does depend on the quantization of each frame so that the two optimization problems cannot be separated.  ...  Fast algorithms such as Viterbi algorithms Fig. 1 . An example of GOP structure with corresponding quantization trellis diagram for the case of three quantization values.  ... 
doi:10.1109/76.585929 fatcat:va7anmoiibc4bn54qpj3pncjry

Mining repetitive clips through finding continuous paths

Junsong Yuan, Wei Wang, Jingjing Meng, Ying Wu, Dongge Li
2007 Proceedings of the 15th international conference on Multimedia - MULTIMEDIA '07  
To address the large computational cost, we propose a novel method which translates repetitive clip mining to the continuous path finding problem in a matching trellis, where sequence matching can be accelerated  ...  Without any a priori knowledge of the contents, lengths and total number of the repetitive clips, we need to discover all of them in the video database.  ...  If two images are identical, then their ordinal measure values should also be the same. Similar to the color signatures, such spatial signatures are invariant to coding variations.  ... 
doi:10.1145/1291233.1291294 dblp:conf/mm/YuanWMWL07 fatcat:pr7ascagprb7hh2jyrz26iob7q

Minimizing Additive Distortion in Steganography Using Syndrome-Trellis Codes

T. Filler, J. Judas, J. Fridrich
2011 IEEE Transactions on Information Forensics and Security  
This fast and very versatile solution achieves state-of-the-art results in steganographic applications while having linear time and space complexity w.r.t. the number of cover elements.  ...  Practical merit of this approach is validated by constructing and testing adaptive embedding schemes for digital images in raster and transform domains.  ...  For example, x i may represent an RGB triple in a color image, a quantized DCT coefficient in a JPEG file, etc.  ... 
doi:10.1109/tifs.2011.2134094 fatcat:tp7ub3cdg5gqhngfqa3vpihgky

Subject index

1999 IEEE Transactions on Image Processing  
., T-IP Feb 99 293-295 progressive image coding using trellis coded quantization.  ...  Quadtrees Trellis codes bitonal image transm., source-channel optimized trellis codes. Kroll, J.M., + , T-IP Jul 99 899-912 progressive image coding using trellis coded quantization.  ... 
doi:10.1109/tip.1999.806633 fatcat:wl55kzilqzd33dlz6kmq3cljdy

Wavelet-Based Image Coding: An Overview [chapter]

Geoffrey M. Davis, Aria Nosratinia
1999 Applied and Computational Control, Signals, and Circuits  
This paper presents an overview of wavelet-based image coding. We develop the basics of image coding with a discussion of vector quantization.  ...  In this paper, we do not explicitly treat color images, but most of the results can be directly extended to color images.  ...  Davis thanks the Digital Signal Processing group at Rice University for their generous hospitality during the writing of this paper.  ... 
doi:10.1007/978-1-4612-0571-5_8 fatcat:cxdlbckapfd47irxifsrrlq3sm

Scale resilient, rotation invariant articulated object matching

Hao Jiang, Tai-Peng Tian, Kun He, S. Sclaroff
2012 2012 IEEE Conference on Computer Vision and Pattern Recognition  
The method needs only a single exemplar image of the target object.  ...  Experiments show that the proposed method is efficient and reliable and can be used to match articulated objects in fast motion videos with strong clutter and blurry imagery.  ...  Key point matching results are color coded (yellow: head, cyan: hands, and green: feet). The lines are optimal walk paths.  ... 
doi:10.1109/cvpr.2012.6247669 dblp:conf/cvpr/JiangTHS12 fatcat:da3orgh3abhkzl5mqncascv66u

Soft Decision Decoding for Holographic Memories with Intrapage Intensity Variations

Seungjune Jeon, Seunghoon Han, Byungchoon Yang, Kyung Min Byun, Byoungho Lee
2001 Japanese Journal of Applied Physics  
A holographic memory system using a two-dimensional array of code sequences and soft decision decoding is implemented.  ...  The random error correction and burst error correction capability of this system is shown.  ...  Acknowledgement This research was supported by the Ministry of Science and Technology of Korea through the National Research Laboratory Program.  ... 
doi:10.1143/jjap.40.1741 fatcat:2qnbulgmfrhirnmtfhdurw6lbe

A video compression scheme with optimal bit allocation among segmentation, motion, and residual error

G.M. Schuster, A.K. Katsaggelos
1997 IEEE Transactions on Image Processing  
We consider the case of a lossless VBSMCVC first, for which we develop the optimal bit allocation algorithm using dynamic programming (DP).  ...  is applicable to variable block size motion-compensated video coders (VBSMCVC), where the variable block sizes are encoded using the QT structure, the DVF is encoded by firstorder differential pulse code  ...  Again, each node of the multilevel trellis contains , the rate needed to encode the quantized DFD of the corresponding block using the motion vector and the quantizer , which together with the level and  ... 
doi:10.1109/83.641410 pmid:18282908 fatcat:dnqcr3hu7zfungclvywkqiv5qm

International Conference on Image Processing

1996 Proceedings of 3rd IEEE International Conference on Image Processing  
binary position coding Fast Wavelet transform for color image compression Direct processing of EZW compressed image data Enhanced zerotree wavelet transform image coding exploiting similarities  ...  Joint quantization and dithering of color images Lale Akarun, D. Ozdemir, 0. Yalqn Color halftoning: a non-separable model J.-S. Liu, F.-H.  ... 
doi:10.1109/icip.1996.560353 fatcat:le3ysy6wxrfr7nq56ueropy7tu

Joint Optimization of Run-Length Coding, Huffman Coding and Quantization Table with Complete Baseline JPEG Compatibility

En-hui Yang, Longji Wang
2007 2007 IEEE International Conference on Image Processing  
Based on this algorithm, we then formulate an iterative algorithm to jointly optimize the run-length coding, Huffman coding and quantization step sizes.  ...  Given an image, if soft decision quantization (SDQ) is applied to its DCT coefficients, then Huffman table, quantization step sizes and SDQ coefficients are three free parameters over which a JPEG encoder  ...  A JPEG encoder consists of three basic steps -DCT transform, quantization and entropy coding, where the entropy coding consists of the run-length coding and Huffman coding.  ... 
doi:10.1109/icip.2007.4379276 dblp:conf/icip/YangW07 fatcat:2myxislobzelnaonqs4mdq6sdm

Proceedings of 3rd IEEE International Conference on Image Processing

1996 Proceedings of 3rd IEEE International Conference on Image Processing ICIP-96  
Nicholls, coding of wavelet coefficients for very low bit rate video A new embedded image codec based on the wavelet transform and binary position coding Fast Wavelet transform for color image compression  ...  Adaptive quantization of image subbands with efficient overhead rate Transform coding using adaptive bases and quantization Transform image coding based on joint adaptation of filter banks and tree structures  ... 
doi:10.1109/icip.1996.559416 fatcat:jb4cdydgf5edtdljfuzj423ozu

Nonexpansive pyramid for image coding using a nonlinear filterbank

R.L. de Queiroz, D.A.F. Florencio, R.W. Schafer
1998 IEEE Transactions on Image Processing  
A nonexpansive pyramidal decomposition is proposed for low-complexity image coding.  ...  The image is decomposed through a nonlinear filter bank into low-and highpass signals and the recursion of the filterbank over the lowpass signal generates a pyramid resembling that of the octave wavelet  ...  Future research directions point to giving up some of the simplicity inherent in the NLP-JPEG for an increase in performance.  ... 
doi:10.1109/83.661003 pmid:18267400 fatcat:oact3ddwfvc2nlyxb6xpu3navy
« Previous Showing results 1 — 15 out of 196 results