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PNG File Format
| Short Name |
PNG |
| Long Name |
Portable Network Graphics |
| Typical File Extensions |
.png |
| Contains |
Bitmap |
PNG (pronounced "ping") is a format for storing
bitmaps that was in
part designed as a superior replacement for
GIF
(part of the
reason for PNG's development was the use of
a patented LZW compression
algorithm in GIF,
which attracted considerable controversy - consequently
PNG's unofficially stands for "PNG's Not GIF").
PNG supports vastly more color options than
GIF, including:
Additionally, PNG supports interlacing,
alpha transparency, and a variety of
features to detect network transmission errors.
What's more PNG files are usually smaller, because of better
compression, than GIF files.
However, there are some limitations with PNG files:
- Browser support of PNG has been patchy, and in particular Microsoft's Internet Explorer (and the AOL and MSN Browsers which use Internet Explorer as underlying technology) have had a number of problems with PNGs, especially with
transparency.
For detailed information on this issue, see
PNG-supporting Browsers.
- PNG does not support animations (unlike GIF). Moreover, while a closely related format,
MNG, is being developed for this
purpose, it is currently not widely supported by browsers,
without additional software (which, of course, most users won't have).
Related Pages on this site:
Related Books:
- Compressed Image File Formats: JPEG, PNG, GIF, XBM, BMP (ACM Press)
 | | By John Miano
Addison-Wesley Professional Paperback (288 pages)
Amazon.com: Compressed Image File Formats is an appealingly compact and useful guide to some of today's most popular file formats used for image data. For any programmer who needs to know how images are stored, this concise reference can serve as a really invaluable resource. Besides full coverage of the popular BMP, GIF, and PNG file formats, the book zeroes in on the JPEG standard, perhaps today's most popular (and most complicated) image format. In a series of short chapters, the book looks at JPEG in detail, from basic file organization (its format and marker fields), file compression techniques (like Huffman coding and DCT), and how to decode (read) and encode (write) JPEG images. By condensing hundreds of pages of specifications and documentation from the voluminous JPEG standard into this short volume, the author has created a worthwhile summary of key JPEG features and compression techniques useful to any graphics programmer. The book also includes C++ code for a simple JPEG encoder (on the accompanying CD-ROM). This example can get you started compressing images using the JPEG format. In addition, the book discusses techniques for creating and decoding progressive JPEGs (used for downloading images in stages, in progressively finer resolutions, over the Internet). Whether you are a programmer faced with decoding or encoding image data, or an interested Webmaster who wants to know the pros and cons of today's image file formats, Compressed Image File Formats provides a worthwhile and concise reference to what's inside image files. --Richard Dragan Topics covered: bitmap basics, color models, Windows BMP file format, XBM file format, JPEG basics and file format, JPEG File Interchange Format (JFIF), JPEG Huffman Coding, data unit encoding, Discrete Cosine Transform (DCT), matrix operations, JPEG decoding and encoding, progressive JPEG, GIF file format and compression, and PNG file format.
List Price: $54.99 Lowest New Price: $24.98 Lowest Used Price: $13.57 Usually ships in 24 hours (As of 20:18 Pacific 7 Jul 2008 More Info)
Buy It Now |
- Internet File Formats: Your Complete Resource for Sending, Receiving, and Using Internet Files
 | | By Tim Kientzle
Coriolis Group Books Paperback (416 pages)
Book 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.
List Price: $39.99 Lowest New Price: $3.99 Lowest Used Price: $0.38 (As of 16:52 Pacific 8 Jul 2008 More Info)
Buy It Now |
Related Software:
- ALL2BMP
123GraphicConverter is a software tool that help you to convert your PSD, JPEG, GIF, and other graphics files to BMP, JPEGWMF, GIF, PNG, TGA, PCX, TIFF graphics files.
- Able Graphic Manager
Able Graphic Manager is a program that enables you to easily view, print and convert graphic files in normal (file by file) and batch (many files at a time) modes. Input formats include Drawing Interchange Format (DXF), TIFF, JPEG, BMP, RLE, PNG, WMF, EMF, TARGA, VDA, ICB, VST, PIX, PXM, PPM, PGM, PBM and ICO, CUR. Output formats include JPEG, TIFF, PCX, PNG, BMP, Targa, PXM, PPM, PGM and PBM.
- AutoDWG DWG2Image
AutoDWG DWG2Image a batch converter converts DWG or DXF files to BMP, JPEG, TIFF, GIF or PNG without needing AutoCAD.
- BatchImage
This program allows you to batch convert image files. It includes an effect edit function and
allows you to stamp copyright information on your images. It supports JPEG, BMP, TIFF,
PCX, PCD, PSD, TAG, PNG, WMF, EMF and PIC file formats.
- FontTwister
FontTwister is the fastest and easiest way to create dazzling text effects. FontTwister comes with an impressive selection of templates for graphic styles, color gradients, textures, shapes, letter edges, 3-D bevels, shadows, buttons and frames. Simple intuitive controls let you interactively real-time view and select your desired effect. You can re-edit text and effects at any time. The effect generator creates unlimited variations of amazing text effects.
 Use high impact, anti-aliased text for logos, 2D and 3D headings in letters, presentations, flyers, invitations, cards, faxes, posters, web graphics, labels, banners, buttons, covers. FontTwister supports several popular image formats (.bmp, .jpg, .png, .tif, .wmf).
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