Image file formats
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Image File Formats PowerPoint PPT Presentation


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Image File Formats. Some Common Image Formats. JPG – Used for most digital photos but “ lossy ” GIF – Best for line drawings. 256 colors maximum. No loss BMP – Bitmap. Every pixel stored individually TIF – Standard in many technical applications. No loss PNG – Lossless image format

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Image File Formats

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Image file formats

Image File Formats


Some common image formats

Some Common Image Formats

  • JPG – Used for most digital photos but “lossy”

  • GIF – Best for line drawings. 256 colors maximum. No loss

  • BMP – Bitmap. Every pixel stored individually

  • TIF – Standard in many technical applications. No loss

  • PNG – Lossless image format

  • RAW – Data as captured by digital camera


Test image 640 x 479 pixels

Test Image (640 x 479 pixels)


Test image in various formats

Test Image in Various Formats

  • JPG 67 kb

  • GIF 185 kb (256 colors, optimized)

  • BMP 899 kb (640*479*3/1024 = 898.125)

  • TIF 902 kb

  • PNG 418 kb

  • RAW 900 kb


Gif test image

GIF Test Image


Gif versus jpg

GIF Versus JPG

  • GIF: 11 kbJPG: 78 kb


Gif versus jpg1

GIF Versus JPG

  • For photographic images JPG is better both for quality and file size

  • For line art GIF is better both for quality and file size

  • The future of line art is probably in vector file formats like SVG (Scalable Vector Graphics)

  • VML (Vector Markup Language) is Microsoft backed


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