Re: [Gimp-user] How to export jpeg without loss of quality?

Rodolfo Medina wrote:

I'm new to Gimp.  I need rescaling and resizing a jpeg picture.  But, after
rescaling and resizing it with Gimp, and after exporting it as jpeg format,
the size of the output file is much smaller: the original 12MB become 300K...
Is it possible, and how, to preserve the original quality?

"Rick Strong" <rnstrong primus ca> writes:

To add to Steve Kinney's excellent summaries, note also that PNGs will export
(i.e. maintain) transparency while JPGs will not.

R. Strong

-----Original Message----- 
From: Steve Kinney
Sent: Sunday, July 29, 2018 11:36 PM
To: gimp-user-list gnome org
Subject: Re: [Gimp-user] How to export jpeg without loss of quality?


Where higher quality matters more than lower file size, for instance
images intended for color printing on glossy stock, the lossless PNG
format will usually be more appropriate than JPG.  The output files are
substantially larger, but with PNG what you save is what you get, with
no loss of detail except due to scaling the image up or down in size
while editing.


Thanks all who kindly replied to my request of help...  I understand there's a
loss of the original size because of my resizing and scaling under Gimp..  But
here we're talking of a 12MB file that becomes 380KB...!  Isn't it too much
also with those considerations?  As for the suggestion of using the png format,
I have the original image in jpeg format...  Are you suggesting of converting
jpg to png before modifing it with Gimp?  Or to save it, within Gimp, from jpg
to png?  The final use of this job is not for the web, but for printing, so
preserving the original quality is important...

Thanks again,



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