Compressing Images Using Google’s Guetzli

Re:Compressing Images Using Google’s Guetzli by kuon on Tuesday May 23, 2017 @05:10AM (#14399894)

Yes JPEG has a lossless mode.

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Re:Compressing Images Using Google’s Guetzli by klodolph on Tuesday May 23, 2017 @08:26AM (#14400598)

The answer is "no", because lossless compression is still compression. But there's no chance that a website was using lossless JPEG, since it's very poorly supported.

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Re:Compressing Images Using Google’s Guetzli by tpetry on Tuesday May 23, 2017 @05:26AM (#14399950)

There are no standard losless jpegs. Even a quality of 100% will introduce loss. Only JPEG2000 is lossless, but unsupported for the web because of patent claims.

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Re:Compressing Images Using Google’s Guetzli by kuon on Thursday May 25, 2017 @05:46PM (#14420365)

I was refering at https://en.wikipedia.org/wiki/Lossless_JPEG which is not compatible with regular JPEG.

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Re:Compressing Images Using Google’s Guetzli by bhouston on Tuesday May 23, 2017 @07:48AM (#14400445)

JPEG2000 from 2000, hence the name. Shouldn't that thing be coming off patent soon?

Does anyone know which patents cover JPEG2000 and their expiry dates?

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