Lossless JPEG

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'''Lossless JPEG''' is an ambiguous term, which may refer to:
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'''Lossless JPEG''' may refer to:
* The standard [[JPEG#Lossless JPEG|lossless modes]] of the original JPEG format
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* The standard [[Lossless JPEG (original)|lossless modes]] of the original [[JPEG]] format
* The [[JPEG-LS]] format (which supports both lossless and lossy compression)
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* The [[JPEG-LS]] format (which is fundamentally lossless, but supports a kind of lossy compression)
* Sometimes, lossless JPEG ''formats'' are confused with lossless JPEG ''transformations''. A lossless JPEG transformation is not a format; it refers to the process of editing (e.g. rotating or cropping) a lossy JPEG image without causing any ''additional'' loss of image quality.
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* A lossless JPEG ''transformation''. A lossless JPEG transformation is not a format; it refers to the process of editing (e.g. rotating or cropping) a lossy JPEG image without causing any ''additional'' loss of image quality.
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* (Incorrectly:) A high quality lossy JPEG. Many people have the reasonable belief that the highest available quality setting (e.g. "100%") will produce a lossless JPEG, but that is almost never the case. JPEG quality settings are defined by the application, so we can't say for sure, but the highest quality setting is usually still lossy.
  
 
Less-likely things it could mean:
 
Less-likely things it could mean:
 
* Only the lossless form of [[JPEG-LS]]
 
* Only the lossless form of [[JPEG-LS]]
 +
* The lossless form of [[JPEG XT]]
 
* The nonstandard [[JPEG#SmartScale|SmartScale]] features promoted by the IJG libjpeg software, when used to achieve lossless DCT compression
 
* The nonstandard [[JPEG#SmartScale|SmartScale]] features promoted by the IJG libjpeg software, when used to achieve lossless DCT compression
* The collection of all formats that are lossless and have ''JPEG'' in their name, which could include some forms of [[JPEG 2000]] and [[JPEG XR]]
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* The set of all formats that are lossless and have ''JPEG'' in their name, which could even include some forms of [[JPEG 2000]] and [[JPEG XR]]
  
 
{{disambiguation}}
 
{{disambiguation}}
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 +
[[Category:Graphics]]
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[[Category:JPEG]]

Latest revision as of 16:08, 21 December 2016

Lossless JPEG may refer to:

  • The standard lossless modes of the original JPEG format
  • The JPEG-LS format (which is fundamentally lossless, but supports a kind of lossy compression)
  • A lossless JPEG transformation. A lossless JPEG transformation is not a format; it refers to the process of editing (e.g. rotating or cropping) a lossy JPEG image without causing any additional loss of image quality.
  • (Incorrectly:) A high quality lossy JPEG. Many people have the reasonable belief that the highest available quality setting (e.g. "100%") will produce a lossless JPEG, but that is almost never the case. JPEG quality settings are defined by the application, so we can't say for sure, but the highest quality setting is usually still lossy.

Less-likely things it could mean:

  • Only the lossless form of JPEG-LS
  • The lossless form of JPEG XT
  • The nonstandard SmartScale features promoted by the IJG libjpeg software, when used to achieve lossless DCT compression
  • The set of all formats that are lossless and have JPEG in their name, which could even include some forms of JPEG 2000 and JPEG XR

This disambiguation page lists articles associated with the term "Lossless JPEG".

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