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Bitmap – BMP

Bitmap – BMP. Normally not compressed Lossless compression can be specified Appeared in PowerPoint Appeared in Web browser. Encapsulated Postscript - EPS. Files cannot be compressed Did not appear in either Web browser or PowerPoint. Graphics Interchange Format - GIF.

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Bitmap – BMP

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  1. Bitmap – BMP Normally not compressed Lossless compression can be specified Appeared in PowerPoint Appeared in Web browser

  2. Encapsulated Postscript - EPS • Files cannot be compressed • Did not appear in either Web browser or PowerPoint.

  3. Graphics Interchange Format - GIF • Uses lossless compression • Most versions support 1, 4, or 8 bits per pixel • Compression limits to 256 colors • Appears in PowerPoint • Appears in Web browser

  4. Joint Photographic Experts Group - JPG • Uses lossy compression • Compression ratios of between 5:1 and 15:1 • Appears in PowerPoint • Appears in Web browser

  5. Macintosh Picture - PCT • PICT files use lossless RLE (run-length encoding) compression. • On the Macintosh with QuickTime installed, Photoshop's PICT file output also supports lossy JPEG compression. • Use PICT if you want to be able to open your RGB or grayscale image with just about any Macintosh program and aren't concerned about file size. • Appeared in both Web browser and PowerPoint.

  6. PC Paintbrush - PCX • PCX output uses lossless RLE (run-length encoding) compression. • Use PCX only when you aren't concerned about file size. • Did not appear in either Web browser or PowerPoint.

  7. Portable Document Format - PDF • Photoshop's PDF output offers a choice between lossless ZIP compression (a form of LZ77) and lossy JPEG compression. • Use PDF for images that will be converted into complete documents that can be both viewed and printed on multiple platforms. • Did not appear in PowerPoint. • Appeared in Web browser using Adobe.

  8. Portable Network Graphics - PNG • Uses lossless compression format. • Almost always compresses images more than GIF and TIFF-LZW, but is assymetrical, compressing much more slowly but decompressing slightly faster than LZW. • Doesn’t compress photo-quality images nearly as much as PhotoJazz, and takes three times as long to compress as PhotoJazz, but decompresses about three times as fast. • Use PNG for compressing poster-quality images when decompression speed is more important than compression speed and compactness is more important than portability. • Appeared in Web browser. • Appeared in PowerPoint.

  9. Photoshop Document - PSD • Photoshop files use run-length encoding (RLE) lossless compression. • To use adjustment layers, type layers, or layer effects, use this format until you need to flatten the image for publication. • Did not appear in PowerPoint • Appeared in Web browser using Quicktime.

  10. Tagged Image File Format - TIF • Files can be compressed. • Photoshop's TIFF output supports all image modes except duotone and multichannel, with any number of alpha or spot-color channels. • TIFF does support 16-bit channels and ICC profiles. Photoshop optionally uses LZW compression for its TIFF output. • The TIFF format itself supports a bewildering number of compression methods. • Appeared in Web browser. • Appeared in PowerPoint.

  11. Windows Metafile - WMF • Files are normally not compressed • Did not appear in Web browser • Did not appear in PowerPoint

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