limiting the print size of a photo
This is correct, you will need to export separate image files with each one specifically resized to a desired physical size.
E.g. if you're sending the files at 300dpi, the 12x18" version will be 3600x5400, while the 10x15 version will need to be scaled down to 3000x4500" before exporting, and the 6x4" version will be 1800x2700. When you Scale the image down, check that your dpi setting (shown in the dialog) is correct, then for the target dimensions you can switch the unit-of-measure from pixels to inches to make specifying the target physical size more intuitive.
But yeah, you should be familiar with this already.
Oh, and of course NEVER save a lower resolution over the original (highest-resolution) version of the source file. If in doubt, you might want to Duplicate the image and resize+export the copy instead of the original window.
-- Stratadrake
strata_ranger@hotmail.com
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Numbers may not lie, but neither do they tell the whole truth.
From: gimp-user-list on behalf of Michael Schumacher
Sent: Tuesday, November 21, 2017 11:35:14 AM
To: gimp-user-list@gnome.org
Subject: Re: [Gimp-user] limiting the print size of a photo
On 11/21/2017 05:52 AM, Glenda Guy wrote:
> Hello, I am establishing a photo website and would like to have two
> options for digital photo downloads: 6x4 to 10x15 and 12x18 upwards.
> All my photos are taken at 300ppi.
>
> Is there a way in GIMP where I can change the photos so a customer
> can download a file that will print with optimal results 10x15 down
> to 6x4 but no bigger unless they choose the 12x18 upwards file?
For the restrictive "no bigger" that you likely have in mind, the answer
is: No.
Nothing will prevent anyone from printing any image at any size.
But you control the number of original pixels they get.
There is Image -> Scale to do this, but I assume you already know how to
scale images to any desired size in pixels.
The customers can scale the image up again, of course, and have the
interpolation method of their choice invent new pixels from what they
got. These do not necessarily look the same, so I guess this would
suffice to fulfill your goal.
--
Regards,
Michael
GPG: 96A8 B38A 728A 577D 724D 60E5 F855 53EC B36D 4CDD
