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Topic: JPEG-LS

    Note: these results are not from the primary (high quality) database.

JPEG JFIF The JPEG compression specification was also published by the International Telecommunication Union (ITU) as Recommendation T.81 and is available in PDF. There is more information about the "lossless and near lossless" JPEG-LS format (and the closely related LOCO-I format) from HP. JPEG JFIF, which is what people generally mean when they refer to "JPEG", is a file format created by the Independent JPEG Group (IJG) for the transport of single JPEG-compressed images. www.w3.org /Graphics/JPEG   (353 words)

hp labs : research : information theory Weinberger, G. Seroussi, G. Sapiro, "The LOCO-I Lossless Image Compression Algorithm: Principles and Standardization into JPEG-LS", Hewlett-Packard Laboratories Technical Report No. HPL-98-193R1, November 1998, revised October 1999. Get HP Labs' software implementation of JPEG-LS JPEG-LS DLL and Plug-in for Adobe Photoshop Comparisons with the old lossless JPEG (Huffman and arithmetic), CALIC, FELICS, and PNG can be found in the full paper. www.hpl.hp.com /loco   (240 words)

APT The leftmost line is best, so APT marginally beats JPEG-LS. is coded losslessly by APT at 1.40 bpp, by PNG at 1.92 bpp and by JPEG-LS at 5.46 bpp. APT is much faster than any known version of JPEG-LS. intuac.com /userport/john/apt   (240 words)

Tech Reports: HPL-98-146: Adaptive Coding of DCT Abstract: In this report we apply some of the Golomb-Rice coding techniques that emerged in JPEG-LS, a new standard for lossless image compression, and apply them towards coding DCT coefficients in the lossy JPEG baseline algorithm. In fact, one significant reduction in complexity provided by the proposed techniques is the complete elimination of the Huffman tables in JPEG baseline which can be a bottleneck in hardware implementations. We give simulation results, comparing the performance of the proposed technique to JPEG baseline, JPEG baseline with optimal Huffman coding (two pass) and JPEG arithmetic. www.hpl.hp.com /techreports/98/HPL-98-146.html   (134 words)

Adaptive coding of DCT coefficients by Golomb-Rice codes In this paper we apply some of the Golomb-Rice coding techniques that emerged in JPEG-LS, a new standard for lossless image compression, and apply them towards coding DCT coefficients in the lossy JPEG baseline algorithm. In fact, one significant reduction in complexity provided by the proposed techniques is the complete elimination of the Huffman tables in JPEG baseline which can be a bottleneck in hardware implementations. We give simulation results, comparing the performance of the proposed technique to JPEG baseline, JPEG baseline with optimal Huffman coding (two pass) and JPEG arithmetic csdl2.computer.org /persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/icip/1998/8821/01/8821toc.xml&DOI=10.1109/ICIP.1998.723551   (185 words)

Data Compression Pointers JPEG-LS JPEG-LS, a proposed JPEG lossless/near-lossless image compression mode, is faster and in many cases compresses tighter than zlib-based PNG. Among my writings on data compression, the only one written in English is History of Data Compression in Japan, which is rather outdated. SPIHT Image Compression (Image Compression with Set Partitioning in Hierarchical Trees)...seems to have crashed. oku.edu.mie-u.ac.jp /~okumura/compression.html   (185 words)

hp labs : research : information theory Get HP Labs' software implementation of JPEG-LS JPEG-LS DLL and Plug-in for Adobe Photoshop Comparisons with the old lossless JPEG (Huffman and arithmetic), CALIC, FELICS, and PNG can be found in the full paper. The term "near-lossless compression" refers to a lossy algorithm for which each reconstructed image sample differs from the corresponding original image sample by not more than a pre-specified value, the (usually small) "loss." Lossless compression corresponds to loss=0. www.hpl.hp.com /loco   (240 words)

ISO/IEC JTC 1/SC 29 Programme of Work [ JBIG ] [ JPEG ] [ JBIG-2 ] [ JPEG-LS ] [ JPEG 2000 ] [ MRC ] [ JPSearch ] [ Superseded version ] Part 13: An entry level JPEG 2000 encoder JBIG-1 (Coded representation of picture and audio information -- Progressive bi-level image compression) www.itscj.ipsj.or.jp /sc29/29w42901.htm   (183 words)

[16] What is the state of the art in lossless image compression? In particular, JPEG-LS significantly outperforms FELICS and lossless JPEG Huffman at similar levels of complexity (it also outperforms lossless JPEG arithmetic, which is of significantly higher complexity). Tested over a wide variety of image types, it was shown to be, on the average, within about 4% of the best available lossless image compression at a fraction of the complexity. Most of the functionality implemented in the suite is as described in the book ``Managing Gigabytes: Compressing and Indexing Documents and Images'', I.H. Witten, A. Moffat, and T.C. Bell; Van Nostrand Reinhold, New York, 1994, ISBN 0-442-01863-0; US $54.95; call 1 (800) 544-0550 to order. www.faqs.org /faqs/compression-faq/part1/section-14.html   (494 words)

[16] What is the state of the art in lossless image compression? In particular, JPEG-LS significantly outperforms FELICS and lossless JPEG Huffman at similar levels of complexity (it also outperforms lossless JPEG arithmetic, which is of significantly higher complexity). See also the MG system containing an implementation of the 'FELICS' algorithm of P.G. Howard and J.S. Vitter. From the MG README file: The MG system is a suite of programs for compressing and indexing text and images. www.faqs.org /faqs/compression-faq/part1/section-14.html   (494 words)

Tech Reports: HPL-98-146: Adaptive Coding of DCT Abstract: In this report we apply some of the Golomb-Rice coding techniques that emerged in JPEG-LS, a new standard for lossless image compression, and apply them towards coding DCT coefficients in the lossy JPEG baseline algorithm. In fact, one significant reduction in complexity provided by the proposed techniques is the complete elimination of the Huffman tables in JPEG baseline which can be a bottleneck in hardware implementations. Adaptive Coding of DCT Coefficients by Golomb-Rice Codes www.hpl.hp.com /techreports/98/HPL-98-146.html   (494 words)

Dual Link HD/HD/SD 10 Bit Capture and Output PCI-X Card KONA LS supports 8 and 10 bit uncompressed video, DV25 and DV50 using the DVCPRO codec, and JPEG, all on an Apple Power Mac G5. Dual Link HD/HD/SD 10 Bit Capture and Output PCI-X Card : Introducing KONA LS, the highest quality and most flexible Standard Definition PCI QuickTime capture card available. In addition to the highest quality in video, KONA LS supports balanced analog, AES/EBU, and embedded audio I/O, all at 24 bits and 48Khz. www.avsupplystore.com /aja-konals.html   (278 words)

Results For a predictive encoder, we chose to implement the non-linear predictive encoder that forms part of the JPEG-LS standard. JPEG encoders normally use Huffman encoding which is slightly less efficient than arithmetic encoding. We suggest that this improvement could be due to the improved predictor (GAP) or to the fact that the authors used arithmetic encoding to produce their final compressed output. www.stanford.edu /class/ee368b/Projects/dhavelin/results.htm   (892 words)

Huffyuv - Wikipedia, the free encyclopedia Huffyuv's algorithm is similar to that of lossless JPEG-LS, in that it predicts each sample and then Huffman-encodes the error. Huffyuv (or HuffYUV) is a very fast, lossless Win32 video codec written by Ben Rudiak-Gould, meant to replace uncompressed YUV as a video capture format. This page was last modified 12:16, 6 February 2006. en.wikipedia.org /wiki/HuffYUV   (124 words)

jpeg.lisp ;;; 3/ 4/99 CJ Vogt - another compatability problem, convert all 'unsigned-byte ;;; to '(unsigned-byte 8) ;;; 3/16/99 CJ Vogt - when writing a jpeg file, APP0 header should be 16 bytes, ;;; not 14, with the added 2 bytes representing the x,y size ;;; of the thumbnail, so I'll set them both to 0. :BGR puts Red ;;; in the LS byte, then Green, then Blue in the MS byte. r 15) do (write-bits stream (svref huffman-size #xf0) (svref huffman-code #xf0)) (setq r (i- r 16))) (encode stream r data huffman-size huffman-code) (setq r 0))))) ;;; ;;; The dc coefficient is encoded as a differential value. members.cox.net /vogt/jpeg.lisp   (124 words)

hp labs : research : information theory Weinberger, G. Seroussi, G. Sapiro, "The LOCO-I Lossless Image Compression Algorithm: Principles and Standardization into JPEG-LS", Hewlett-Packard Laboratories Technical Report No. HPL-98-193R1, November 1998, revised October 1999. The standard is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression for Images) developed at Hewlett-Packard Laboratories. Weinberger, G. Seroussi, G. Sapiro, "LOCO-I: A Low Complexity, Context-Based, Lossless Image Compression Algorithm," Proc. www.hpl.hp.com /loco   (240 words)

The Art Of Lossless Data Compression http://go.to/artest PNG compresses them to 15,328,841 bytes; JPEG-LS to 15,404,818 (that's about 172%). ERI currently holds the world record for lossless compression of the most popular set of True Colour (24-bit) images. If one switch "-3h13" is used for all 24 files, they are compressed by ERI 5.1fre to 9,062,479 bytes. geocities.com /eri32/kodak.html   (181 words)

JPEG JFIF There is more information about the "lossless and near lossless" JPEG-LS format (and the closely related LOCO-I format) from HP. The JPEG compression specification was also published by the International Telecommunication Union (ITU) as Recommendation T.81 and is available in PDF. JPEG (Joint Photographic Experts Group) is a lossy compression method standardised by ISO. www.w3.org /Graphics/JPEG   (353 words)

Shantanu Rane : Publications Shantanu Rane, Guillermo Sapiro, "Evaluation of JPEG-LS, the new lossless and near-lossless still image compression standard, for Compression of High Resolution Elevation Data" Shantanu Rane, Marcelo Bertalmio, Guillermo Sapiro, "Structure and Texture Filling-in of missing image blocks for Wireless Transmission and for Compression Applications" Shantanu Rane, Marcelo Bertalmio, Guillermo Sapiro, "Structure and Texture Filling-in of missing image blocks for Wireless Transmission and Compression www.stanford.edu /~srane/sdr_pubs.html   (353 words)

Lossless Image Compression with Switched Linear Prediction While compression ratios of methods which adapt on a block-by-block basis are generally inferior to those on a pixel-by-pixel basis, the results I obtained on nine ISO test images are comparable to the lossless image compression standard JPEG-LS. This method divides an image into small blocks and chooses the optimal predictor among a set of predictors for each block based on the information obtained from previously processed blocks. I would like to propose a simple method for lossless image compression. www3.tokai.or.jp /sjw/compress/compress.html   (118 words)

hp labs : research : information theory Weinberger, G. Seroussi, G. Sapiro, "The LOCO-I Lossless Image Compression Algorithm: Principles and Standardization into JPEG-LS", Hewlett-Packard Laboratories Technical Report No. HPL-98-193R1, November 1998, revised October 1999. The standard is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression for Images) developed at Hewlett-Packard Laboratories. Weinberger, G. Seroussi, G. Sapiro, "LOCO-I: A Low Complexity, Context-Based, Lossless Image Compression Algorithm," Proc. www.hpl.hp.com /loco   (240 words)

Keith Price Bibliography JPEG Standards and Use Bedi, S. Edirisinghe, E.A. Grecos, G. Improvements to the JPEG-LS prediction scheme, Both an 8X8 DCT based and predictive lossless coding. Lakhani, G. Zhong, N. Derivation of Prediction Equations for Blocking Effect Reduction, iris.usc.edu /Old-Notes/bibliography/image-proc163.html   (895 words)

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