Re: [Gimp-user] Why does saves as JPG default to quality 85?

["phanisvara das" <listmail phanisvara com>]

On Fri, 23 Mar 2012 20:09:37 +0530, Keith Purtell <kpurtell imirus com>  
wrote:

> I've noticed that every time I save an image in GIMP as JPG the quality
> slider bar defaults to 85. Even though I keep changing it to 75. If this
> numeric value is a Photoshop equivalent like other GIMP features, then 85
> is probably a wasted effort. The research* I'm aware of* (note emphasis)
> says that the quality in JPG images saved at a level above 75 is
> "theoretical." In other words, the increased quality is there in  
> technical
> terms, but imperceptible to the human eye. Comments?

i don't get 85% as default every time. in my observation, the default  
changes with the image, i.e., lots of detail or lots of same or similar  
colors, etc.

when i prepare a jpg for the web, i go down with the quality until i see a  
real difference at 100% zoom; often that's only a fraction of the default  
setting. on the other hand, if the jpg is intended for printing by  
someone, i usually leave the default, which often is above 90% with my  
images.

--
phani.