Google new jpeg compression guetzli

Dopedangel · 03-23-2017, 04:25 AM

Hi Kovid do you have any plans to implement the new google open source jpeg compressor https://github.com/google/guetzli/.
Using it I am getting savings of 10%-15% more in lossless and lossy compression both. Though the processing time is longer but Image quality looks better to me.

kovidgoyal · 03-26-2017, 10:42 PM

calibre already has enhanced JPEG compression via mozjpeg -- in my brief tests I dd not see much difference between the two and I did not like the fact that guetzli tends to fade out colors a bit. But, my tests were not really scientific, so I could be wrong.

Dopedangel · 03-28-2017, 12:35 AM

You could be correct about the quality any way they are still working on it so it might improve over time. Personally I am interested in this for comics as a 10-15% difference doesn't matter much with 500kb cover. When you look at a 100mb comic book or 15-20 gb of comics the savings do pile up.
I am wondering with the way things are going with AI, Machine Learning and Deep Learning how far they can take media compression in particular and compression in general.

03-23-2017, 04:25 AM	#1
Dopedangel Wizard Posts: 1,759 Karma: 30063305 Join Date: Dec 2006 Location: Singapore Device: Boyue	Google new jpeg compression guetzli Hi Kovid do you have any plans to implement the new google open source jpeg compressor https://github.com/google/guetzli/. Using it I am getting savings of 10%-15% more in lossless and lossy compression both. Though the processing time is longer but Image quality looks better to me.

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03-26-2017, 10:42 PM	#2
kovidgoyal creator of calibre Posts: 43,857 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	calibre already has enhanced JPEG compression via mozjpeg -- in my brief tests I dd not see much difference between the two and I did not like the fact that guetzli tends to fade out colors a bit. But, my tests were not really scientific, so I could be wrong.

03-28-2017, 12:35 AM	#3
Dopedangel Wizard Posts: 1,759 Karma: 30063305 Join Date: Dec 2006 Location: Singapore Device: Boyue	You could be correct about the quality any way they are still working on it so it might improve over time. Personally I am interested in this for comics as a 10-15% difference doesn't matter much with 500kb cover. When you look at a 100mb comic book or 15-20 gb of comics the savings do pile up. I am wondering with the way things are going with AI, Machine Learning and Deep Learning how far they can take media compression in particular and compression in general.