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All forums => ThumbsPlus v7-v9 Questions => Topic started by: Gary on 2014-09-22 17:41:24

Title: Thumbnail Compression?
Post by: Gary on 2014-09-22 17:41:24

What is the preference for thumbnail compression?  I have been using JPEG with quality 88.  Has anyone used LZH?  I tested LZH once and it seems to take more space than JPEG/88.  I cannot detect any difference in the performance of thumbnail creation between LZH and JPEG.  Thanks for any input.

Title: Thumbnail Compression?
Post by: Daan van Rooijen on 2014-09-22 20:02:02

> What is the preference for thumbnail compression?

JPG.

LZH is mainly still there for legacy reasons. JPG is much more compact. LZH is a zip-like lossless compression format.

For best JPG compression, use multiples of 8 for your thumbnail dimensions (e.g. 120x120).

If you need color-accurate thumbnails, use a JPG quality setting of 94 or higher (but these will take significantly more space than lower settings).

Title: Thumbnail Compression?
Post by: Gary on 2014-09-22 20:23:29

thank you for the great information!  i will adjust the settings i've been using and rebuild the thumbnail database based on your recommendations.  thank you again.