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JPEG Quality
JPEG Quality is a setting which controls the amount of data
lost in lossy compression when
files are saved in the JPEG
file format.
In most paint programs,
you can find a setting in the Save As dialog to
control the JPEG Quality:
- Higher Quality values generally lead to less data
loss, higher quality images, fewer
artifacts, but larger
file sizes.
- Lower Quality values generally lead to more data
loss, lower quality images, more
artifacts, but smaller
file sizes.
In some paint programs the
setting may be labelled differently (for example "Compression"
and/or "Smoothing") although the general effect is the
same (higher Compression/Smoothing is equaivalent to lower Quality,
and lower Compression/Smoothing is equivalent to higher Quality).
Related Books:
- Compressed Image File Formats: JPEG, PNG, GIF, XBM, BMP
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 | | By John Miano
Addison-Wesley Professional Paperback (288 pages)
Product Description: Examines the most common graphics file formats in detail and demonstrates how to encode and decode image files for each. Offers in-depth coverage of the elaborate JPEG and newer PNG formats, providing clear explanations of complex concepts, experience-based practical techniques, and code examples. Softcover. CD-ROM included. DLC: Image processing--Computer programs.
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- Graphics File Formats
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 | | By David C. Kay
McGraw-Hill Companies Paperback (496 pages)
Product Description: For software developers, systems managers, and computer hobbyists, this book will help bring a welcome sense of order to the chaotic world of graphics file format. David Kay and John Levine have compiled detailed specifications for 30 popular graphics file formats, so readers can more quickly and easily decide which standards are best for their applications.
List Price: $29.95* Lowest New Price: $19.96* Lowest Used Price: $0.45* *(As of 01:56 Pacific 30 Jul 2010 More Info)
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- Internet File Formats: Your Complete Resource for Sending, Receiving, and Using Internet Files
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 | | By Tim Kientzle
Coriolis Group Books Paperback (416 pages)
Product Description: Provides a detailed file format dictionary to help you understand most of the major file formats found on the Internet. Comes with a CD-ROM jam-packed with programs and tools to help you work with the files you come across on the Internet. Includes player programs to use files you download from the Internet. Contains compression and decompression utilities, and utilities to help you convert files from one format to another. Offers the tools to help you create HTML files and publish on the Web, and efficiently transfer your files. Helps you to read, write, convert, and use most of the major file types encountered on the Internet.
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- JPEG: Still Image Data Compression Standard (Digital Multimedia Standards)
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 | | By William B. Pennebaker; Joan L. Mitchell
Springer Hardcover (650 pages)
Product Description: Created by the Joint Photographic Experts Group (JPEG), the JPEG standard is the first color still image data compression international standard. Crucial to the work of companies and universities throughout the world, it consists of 20 explicitly defined processes to encode or decode continuous tone still images. This new guide to JPEG and its technologies offers detailed information on the new JPEG signaling conventions and the structure of JPEG compressed data. At the same time, it provides a general review of image-coding techniques, with an emphasis on JPEG-related topics. 200 illustrations.
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- JPEG2000: Image Compression Fundamentals, Standards and Practice (The International Series in Engineering and Computer Science)
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 | | Springer Hardcover (800 pages)
Product Description: JPEG2000: Image Compression Fundamentals, Standards and Practice is an essential reference for professional engineers and academic researchers in the fields of communication, image processing, signal processing, information theory, and multimedia. It has specific applications for those involved in the development of software and hardware solutions for multimedia, internet, and medical imaging applications, and for those pursuing research in image and video compression. The book is suitable as a primary text for a course in image compression; it would also be helpful in the context of a more general class covering multimedia compression at an in-depth level. Final year engineering undergraduate students pursuing projects in multimedia compression and/or communication would also find the book a useful tool. JPEG2000: Image Compression Fundamentals, Standards and Practice is written in four parts, to serve the interests of a wide readership. Representing about half the total text, Part I of the book provides a thorough and up-to-date background in the fundamentals of image compression, including topics not previously brought together in a single volume. Part 2 contains a complete description of the JPEG2000 standard. This description is written in such a way as to be completely self-contained from an implementation perspective, while it contains numerous references to the fundamental developments in Part 1. Together, Parts 1 and 2 serve the complementary roles of explanation and exposition in relation to both the JPEG2000 standard and modern image compression techniques. Part 3 of the book is devoted to the implementation and exploitation of the JPEG2000 standard, containing guidelines, suggestions, and analyses for both software and hardware oriented applications. Part 4 describes other key image compression standards, namely JPEG and JPEG-LS. The purpose of this material is to allow the reader to compare the capabilities and complexity associated with these standards with those of JPEG2000. This final part of the book also serves to provide a practical demonstration of some of the fundamental techniques introduced in Part 1 which are not demonstrated by the JPEG2000 standard. About the CD-ROM: Included with the book is a compact disc containing documentation, binaries, and all source code to the Kakadu software tools. This software provides a complete C++ implementation of JPEG2000 Part 1, demonstrating many of the principles described in the text itself. The software is frequently referenced from the text as an additional resource for understanding complex or subtle aspects of the standard. Conversely, the software makes frequent reference to the text and has been written to mesh with the terminology and notation employed therein.
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- JPEG2000 Standard for Image Compression: Concepts, Algorithms and VLSI Architectures
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 | | By Tinku Acharya
Wiley-Interscience Hardcover (296 pages)
Product Description: Your definitive guide to state-of-the-art image compression With excellent image quality at low bit rate, progressive transmission, scalability, region-of-interest coding, random access, error resilience, and many other salient features, the JPEG2000 standard for scalable image compression is rapidly becoming the cornerstone of today’s innovative multimedia industry. Providing comprehensive and accessible coverage of the new JPEG2000 standard, this timely and authoritative text provides a clear overview of both the theory and principles behind the algorithms, and a solid foundation of multimedia compression techniques. Written by one of JPEG2000’s key developers, this crucial reference features: - Introduction of the compression principles for different multimedia data-types
- A review of the current JPEG standard, its advantages and disadvantages
- Principles of Discrete Wavelet Transform (DWT) and its efficient implementation
- VLSI architectures for Discrete Wavelet Transform and case studies
- Details of the underlying core algorithms, code-stream organization, and formation of the compressed file for the JPEG2000 standard
- The VLSI implementation of JPEG2000 for hardware such as digital cameras, color faxes, printers, scanners, etc.
- A discussion of open issues not clearly defined by the standard
Numerous practical examples, illustrations, and related references, plus a discussion of open issues makes this text a must-have for electrical engineering and computer science students and practitioners alike.
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