Search (1414 results, page 1 of 71)

  • × year_i:[1990 TO 2000}
  1. Alexander, M.: Digitising books, manuscripts and scholarly materials : preparation, handling, scanning, recognition, compression, storage formats (1998) 0.19 
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    Abstract
    The British Library's Initiatives for Access programme (1993-) aims to identify the impact and value of digital and networking technologies on the Library's collections and services. Describes the projects: the Electronic Beowulf, digitisation of ageing microfilm, digital photographic images, and use of the Excalibur retrieval software. Examines the ways in which the issues of preparation, scanning, and storage have been tackled, and problems raised by use of recognition technologies and compression
    Date
    22. 5.1999 19:00:52
  2. Wolff, J.G.: Computing, cognition and information compression (1993) 0.15 
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    Abstract
    The storage and processing of information in computers and in brains may often be understood information compression. Reviews what is meant by information and, in particular, what is meant by redundancy, a concept fundamental in all methods for information compression. Describes principles of information compression
  3. Dimitrova, N.; Golshani, F.: Motion recovery for video content classification (1995) 0.14 
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    Abstract
    Discusses the analysis of video for the classification of images in order to develop a video database. Covers compression; motion recovery in digital video; low-level motion extraction; single macroblock tracing; intermediate-level motion analysis; high-level motion analysis; spatiotemporal hierarchical representation; information filtering and digital video; content filtering opertaors; the query language; querying video contents; an architecture for video classification and retrieval; the visual query language VEVA; and implementation of macroblock tracing
    Date
    8. 4.1996 9:22:36
  4. Guenette, D.R.: Document imaging, CD-ROM, and CD-R : a starting point (1996) 0.14 
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    Abstract
    An introduction to technical solutions for the generation and conversion of digital documents, using affordable scanner devices, document imaging systems and OCR technologies with cheap, networkable high storage capacity media such as CD-ROMs and CD-R signals the arrival of CD-ROM based document imaging systems. Describes the processes involved, including: the document imaging process; use of scanners to make bitmaps; data compression; advantages of indexing the images; OCR techniques; and document display. Lists some of the companies providing products and services applicable to CD-ROM and CD-R based document imaging systems
    Date
    6. 9.1996 19:08:22
  5. Huang, T.; Mehrotra, S.; Ramchandran, K.: Multimedia Access and Retrieval System (MARS) project (1997) 0.13 
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    Abstract
    Reports results of the MARS project, conducted at Illinois University, to bring together researchers in the fields of computer vision, compression, information management and database systems with the goal of developing an effective multimedia database management system. Describes the first step, involving the design and implementation of an image retrieval system incorporating novel approaches to image segmentation, representation, browsing and information retrieval supported by the developed system. Points to future directions for the MARS project
    Date
    22. 9.1997 19:16:05
  6. Brandt, R.: Video compression : the why and the how (1993) 0.12 
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    Abstract
    Describes the technology of video compression as the key to the practical application of CD-ROM storage to multimedia CD-ROM databases
  7. Gates, R.; Bang, S.: Compression and archiving (1993) 0.12 
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  8. Pennebaker, W.B.; Mitchell, J.L.: JPEG still image data compression standard (1993) 0.12 
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  9. Bookstein, A.; Klein, S.T.: Compression, information theory, and grammars : a unified approach (1990) 0.12 
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  10. Cheng, K.-S.; Young, G.H.; Wong, K.-F.: ¬A study on word-based and integral-bit Chinese text compression algorithms (1999) 0.12 
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    Abstract
    Experimental results show that a word-based arithmetic coding scheme can achieve a higher compression performance for Chinese text. However, an arithmetic coding scheme is a fractional-bit compression algorithm which is known to be time comsuming. In this article, we change the direction to study how to cascade the word segmentation model with a faster alternative, the integral-bit compression algorithm. It is shown that the cascaded algorithm is mor suitable for practical usage.
  11. Delfino, E.: ¬The Internet toolkit : file compression and archive utilities (1993) 0.10 
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    Abstract
    As a result of the combination of high transmission speeds and large data file sizes, many files available over the Internet come in archived and compressed form which need to be decompressed before being read. Discusses the techniques available for file compression and extraction and where to find these utilities on the Internet
  12. Bell, T.C.; Moffat, A.; Nevill-Manning, C.G.; Witten, I.H.; Zobel, J.: Data compression in full-text retrieval system (1993) 0.10 
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    Abstract
    When data compression is applied to full-text retrieval systems, intricate relationships emerge between the amount of compression, access speed, and computing resources required. We propose compression methods, and explore corresponding tradeoffs, for all components of static full-text systems such as text databases on CD-ROM. These components include lexical indexes, and the mein text itself. Results are reported on the application of the methods to several substantial full-text databases, and show that a large, unindexed text can be stored, along with indexes that facilitate fast searching, in less than half its original size - at some appreciable cost in primary memory requirements
  13. Wittan, I.H.; Bell, T.C.; Nevill, C.G.: Indexing and compressing full-text databases for CD-ROM (1991) 0.09 
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    Abstract
    CD-ROM is an attractive delivery vehicle for full text databases. Large storage capacity and low access speed, carefully designed indexing structures, including a concordance, are necessary to enable the text to be retrieved efficiently. However, the indexes are sufficiently large that they tax the ability of the main store to hold them when processing queries. The use of compression techniques can substantially increase the volume of text that a disc can accomodate, and substantially decrease the amount of primary storage needed to hold the indexes. Describes a suitable indexing mechanism, and its compression potential using modern compression methods. It is possible to double the amount of text that can be stored on a CD-ROM disc and include a full concordance and indexes as well
  14. Akman, K.I.: ¬A new text compression technique based on natural language structure (1995) 0.09 
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    Abstract
    Describes a new data compression technique which utilizes some of the common structural characteristics of languages. The proposed algorithm partitions words into their roots and suffixes which are then replaced by shorter bit representations. The method used 3 dictionaries in the from of binary search trees and 1 character array. The first 2 dictionaries are for roots, and the third one is for suffixes. The character array is used for both searching compressible words and coding incompressible words. The number of bits in representing a substring depends on the number of the entries in the dictionary in which the substring is found. The proposed algorithm is implemented in the Turkish language and tested using 3 different text groups with different lenghts. Results indicate a compression factor of up to 47 per cent
  15. Steinmetz, R.: Data compression in multimedia computing : principles and techniques (1994) 0.09 
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    Abstract
    Integrated multimedia systems process text, graphics, and other discrete media as well as digital audio, and video data. Considerable amounts of graphics, audio and video data in their uncompressed form, especially moving pictures, require storage and digital network capabilities that will not be available in the near future. Nevertheless, local, as well as networked, multimedia applications and systems have become realities. In order to cope with these storage and communication requirements in such integrated multimedia systems, compression technology is essential. This paper starts with a brief motivation of the need for compression and subsequently states the essential requirements for these techniques in the scope of multimedia systems and applications. As most of these techniques apply the same principles, namely, the source, entropy, and hybrid coding fundamentals, these are explained in detail. Based on a general framework of the steps encountered in a compression system - data preparation, processing, quantization, and entropy coding - this paper outlines details about the techniques developed by CCITT (H.261, i.e. px64), in the ISO/IEC (JPEG, MPEG) stadardization bodies and the proprietary DVI system
  16. Sengstack, J.: MPEG sets the standard (1994) 0.09 
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    Abstract
    Discusses the potential of MPEG (Motion Picture Experts Group), an international standard poised to revolutionize digital video compression and decompression for use in full screen, full motion video applications
  17. Craven, T.C.: Condensed representation of sentences in graphic displays of text structures (1990) 0.08 
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    Abstract
    This article ic concerned with how sentences may be represented briefly but informatively in graphic desplays of a sentence dependence structure. Different automatic abbreviation schemes were assessed on a sample data set for compression and ambiguity. 'Speedwriting' of words longer than five letters yielded a compression to 80% of the source text, with very low ambiguitiy. This and two other automatic notemaking-like techniques have been implemented as options in the TEXNET text structure management system
  18. Bonomi, M.: Multimedia and CD-ROM : an overview of JPEG, MPEG and the future (1991) 0.08 
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    Abstract
    One of the keays to succesful multimedia CD-ROM database development lies in data compression. Digital images are bulky to store and slow to transmit (a single digitised colour photograph may contain 25 MB of data). Describes the 2 key standards for image compression: JPEG (Joint Photographic Experts Group) and MPEG (Moving Pictures Experts Group). JPEG is the method of choice for applications concerned solely with still images: desktop publishing; electronic photographic processing; digital scanners and colour laser printers. MPEG is more expensive and complicated but more powerful and better suited to asmmetrical applications such as CD-ROM databases
  19. Gillman, P.: Data handling and text compression (1992) 0.08 
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    Abstract
    Data compression has a function in text storage and data handling, but not at the level of compressing data files. The reason is that the decompression of such files add a time delay to the retrieval process, and users can see this delay as a drawback of the system concerned. Compression techniques can with benefit be applied to index files. A more relevant data handling problem is that posed by the need, in most systems, to store two versions of imported text. The first id the 'native' version, as it might have come from a word processor or text editor. The second is the ASCII version which is what is actually imported. Inverted file indexes form yet another version. The problem arises out of the need for dynamic indexing and re-indexing of revisable documents in very large database applications such as are found in Office Automation systems. Four mainstream text-management packages are used to show how this problem is handled, and how generic document architectures such as OCA/CDA and SGML might help
  20. Barnsley, M.F.; Hurd, L.P.: Fractal image compression (1993) 0.08 
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    LCSH
    Image compression
    Subject
    Image compression

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