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Understanding Common Image File Types and File Size vs. Image Quality

Learn about different image file types like JPEG, GIF, PNG, TIFF, and more. Discover how compression affects file size and image quality. Explore bitmaps, pixels, compression techniques, and formats best suited for various types of images.

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Understanding Common Image File Types and File Size vs. Image Quality

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  1. Common Bitmap Image File Types File Size vs. Image Quality

  2. JPEG, JPE, JPG • Best for full-color photographs • Highly compressed • Encoded in full color • Lossy compression • Loses quality as you edit and save • JPG most universally used lossy format

  3. GIF • Good for fewer colors, such as a logo • Indexed format – uses up to 256 colors • 256 = 28 referred to as 8-bit color • Advantages • Transparency • Animation

  4. PNG • Two modes • Indexed • Full color • Lossless compression • Full and partial transparency • Doesn’t support animation

  5. XCF • GIMP native format • Saves layers and other information

  6. TIFF, TIF • Full-color • Non-lossy & lossless • Various “dialects” of TIFF • Good for keeping originals

  7. RAW • Proprietary camera formats • BMP • Windows format; huge files; no advantage over PNG or TIFF • PSD • Adobe’s proprietary format • ICO • Windows Icon format

  8. Image File Characteristics GIF, JPEG, PNG, TIFF

  9. GIF

  10. GIF

  11. JPEG, JPG, JPE

  12. PNG

  13. TIFF, TIF

  14. Compression

  15. Bitmap File Formats

  16. Pixels Galore Bitmap, Raster, Pixel-based Images

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