Image file formats - TIF, JPG, PNG, GIF - The Diigo Meta page

• 04 May 17
  

  tsuzannenc
• 09 Jun 16
  

  ajblackmer
  • JPG is the most used image file format.
  • TIF is lossless (including LZW compression option), which is considered the highest quality format for commercial work.
  • GIF was designed by CompuServe in the early days of computer 8-bit video, before JPG, for video display at dial up modem speeds.
  • PNG can replace GIF today (web browsers show both), and PNG also offers many options of TIF too (indexed or RGB, 1 to 48-bits, etc).
  • Camera RAW files are very important of course, but RAW files must be processed to regular formats (JPG, TIF, etc) to be viewable and usable in any way.
  • • Compression quality - Lossy for smallest files (JPG), or Lossless for best quality images (TIF, PNG). 
    • Full RGB color for photos (TIF, PNG, JPG),   or Indexed Color for graphics (PNG, GIF, TIF). 
    • 16-bit color (48-bit RGB data) is sometimes desired (TIF and PNG). 
    • Transparency or Animation is used in graphics (GIF and PNG). 
    • Documents - line art, multi-page, text, fax, etc - this will be TIF. 
    • CMYK color is certainly important for commercial prepress (TIF).

  4 more annotations...

• 06 Jun 16
  

  walmad0820a

  iPadSurvival101

• 03 Jun 16
  

  sakura0724
  •                        

    Property	JPG	TIF	PNG	GIF
    Lossy compression	X
    Lossless compression		X	X	X
    Uncompressed option		X
    Grayscale	X	X	X	X
    RGB color	X	X	X
    8 bit color (24 bit data)	X	X	X
    16 bit color option		X	X
    CMYK or LAB color		X
    Indexed color option		X	X	X
    Transparency option			X	X
    Animation option				X

     

    
     
• 29 Feb 16
  

  Paula Goodale
• 15 Feb 16
  

  Philip H
  • However JPG uses lossy compression to accomplish this feat, which is a strong downside. A smaller file, yes, there is nothing like JPG for small, but this is at the cost of image quality.
  • However JPG uses lossy compression to accomplish this feat, which is a strong downside. A smaller file, yes, there is nothing like JPG for small, but this is at the cost of image quality. This degree is selectable (with an option setting named JPG Quality), to be lower quality smaller files, or to be higher quality larger files.
  • Frankly, JPG is used when small file size is more important than maximum image quality (web pages, email, memory cards, etc). But JPG is good enough in many cases, if we don't overdo the compression.
  • in the form of added JPG artifacts.
  • TIF does most of anything you might want, from 1-bit to 48-bit color, RGB, CMYK, LAB, or Indexed color. Most any of the "special" file types (for example, camera RAW files, fax files, or multipage documents) are based on TIF format, but with unique proprietary data tags - making these incompatible unless expected by their special software.
  • except that web pages don't show TIF files
  • PNG also offers many options of TIF too (indexed or RGB, 1 to 48-bits, etc)

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  • TIF is lossless (including LZW compression option), which is considered the highest quality format for commercial work. The TIF format is not necessarily any "higher quality" per se (the image pixels are what they are), and most formats other than JPG are lossless too. This simply means there are no additional losses or JPG artifacts to degrade and detract from the original
• 

  cmvtech

  design Pictures

  • TIF is lossless (including LZW compression option), which is considered the highest quality format for commercial work. The TIF format is not necessarily any "higher quality" per se (the image pixels are what they are), and most formats other than JPG are lossless too. This simply means there are no additional losses or JPG artifacts to degrade and detract from the original
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• 30 Mar 08
  

  Guillermo Santamaria
  • On the web, JPG is the best choice (smallest file) for photo images, and GIF is most common for graphic images.
  • Photo images have continuous tones, meaning that adjacent pixels often have very similar colors, for example, a blue sky might have many shades of blue in it. Normally this is 24 bit RGB color, or 8 bit grayscale, and a typical color photo may contain perhaps 100,000 colors, out of the possible set of 16 million colors in 24 bit RGB color.
  • Graphics are drawings, not photos, and they use relatively few colors, perhaps less than 16 colors in the entire image.
  • JPG files are very small files for continuous tone photo images, but JPG is poor for graphics.

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