Friday, June 29, 2007

JP2 Samples for review

In our current workflow, we convert TIFs from our scanner(s) into 100% lossless JP2 using LuraTech's SDK. We're evaluating lower quality JP2, and your comments are appreciated for the following images. This sample was taken from a volume of Curtis' Botanical Magazine. There are 211 images in the volume.

Total file size for all uncompressed TIFFs: 4.39GB
Total file size for 100% JP2: 2.28GB
Total file size for 90% JP2: 660MB
Total file size for 80% JP2: 499MB
Total file size for 50% JP2: 160MB
Total file size for 30% JP2: 58.5MB

Illustration - TIFF 21.6MB

100% quality JP2
Size: 12.6MB

Size: 2.8MB

Size: 2.0MB

Size: 527KB

Size: 184KB

Text - TIFF 21.0MB

100% quality JP2
Size: 10.7MB

Size: 2.8MB

Size: 2.0MB

Size: 565KB

Size: 208KB


At 6:04 AM, Anonymous Anonymous said...

I like the 100% especially on the text pages. much easier to read when printed out the smaller sizes blur the type so certain letters are unreadable.

At 2:27 AM, Blogger pk said...

With respect to the illustrations, there is, in many situations, quite a bit of either compression or physical artifact (in general, among the collection) which can't probably be better alleviated/ameliorated without having to load from the tiff files I suspect. The 100% files are therefore the best alternative and there really are notable declines in quality moving down in the % examples you linked, particularly at the higher magnifcations. These are significant differences in my opinion and I hope you are able to persist with the higher quality version.

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At 6:06 AM, Blogger David said...

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At 4:42 AM, Blogger Mike said...

Amazing! Incredible idea. I never thought of converting TIFs files from scanner into 100% loss less JP2 files using LuraTech's SDK. I will certainly try it and hoping that it would work great for me as well :)
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