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Common Bitmap Image File Types. File Size vs. Image Quality. 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. GIF. Good for fewer colors, such as a logo
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Common Bitmap Image File Types File Size vs. Image Quality
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
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
PNG • Two modes • Indexed • Full color • Lossless compression • Full and partial transparency • Doesn’t support animation
XCF • GIMP native format • Saves layers and other information
TIFF, TIF • Full-color • Non-lossy & lossless • Various “dialects” of TIFF • Good for keeping originals
RAW • Proprietary camera formats • BMP • Windows format; huge files; no advantage over PNG or TIFF • PSD • Adobe’s proprietary format • ICO • Windows Icon format
Image File Characteristics GIF, JPEG, PNG, TIFF
Pixels Galore Bitmap, Raster, Pixel-based Images