Re: [Gimp-user] Resizing

[Jay Smith <jay JaySmith com>]

In addition to ImageMagick which can do all sorts of great stuff, to do 
this kind of thing we had to resort to writing a Perl program.

Our inputs are TIFFs and our outputs are JPEGs in four different pixel 
size-ranges.  The output pixel size for some is fixed (i.e. for 
thumbnails) and for others is variable, but within a range, depending 
upon the input size.

On one hand it is "simple" when you describe it in words, along with a 
little hand-waving.  However, trying to do it programatically is a bit 
messy.

Perl does have image handling modules that help a lot.  (Disclaimer, I 
did not personally do any of the real work; I just did the talking and 
hand-waving.)

We have a library of many tens of thousands of source images as TIFFs. 
We keep them as TIFFs for ultra-long-term purposes, also for 
print-on-paper use, and don't want any compression, etc., etc.  New 
source images are dropped into the library at will.  A command is run 
several times per week, or as needed, which compares all the sources to 
all the targets and makes/remakes any new targets where targets do not 
yet exist or any source's timestamp is newer than the target.

It can be done.

Jay

On 02/03/2021 04:10 PM, Rick Strong wrote:
> You probably need a script that references each file in a folder and
> acts on them individually before closing it and moving on to the next
> file in the folder.
>
> I used to do that sort of scripting for Corel Draw and PageMaker but I'm
> not in that game any more. It should be straightforward for anyone who
> knows what they are doing.
>
> Rick S.
>
> -----Original Message----- From: Jo Kent via gimp-user-list
> Sent: Tuesday, January 26, 2021 6:18 AM
> To: gimp-user-list gnome org
> Subject: [Gimp-user] Resizing
>
> I have worked out how to batch resize which I’d great when all the
> images start of roughly the same size but I have a batch of images that
> vary from 300kb to 4500kb and I want them all to be approx 200kb is it
> possible to set a size rather than a percentage/pixel size that creates
> a variety of sizers, smaller but not what I require. To resize each
> image individually is very time consuming.
> Help!

--
Jay Smith

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