Prevent "scale image: fit within" from upscaling image on export?
I exported a bunch of images of different sizes using an export preset with "Size to: Fit Within (Pixels):" a 960x960 square and I was surprised that some of the images that I'd manually scaled (using "Edit with Gimp") to 720px[1] were UPSCALED to 960px.
This was not what I expected: since upscaling an image can never result in an image of better quality I couldn't image why anyone would want to do such a thing (at least until I came on here and discovered that apparently people want to do this to satisfy stupid stock agency requirements for minimum file sizes!)
Is it possible to create an export preset which will only ever *reduce* the size of an image to fit within the specified rectangle - never *increase* it? Or the reverse, for those who have to deal with the stock agencies?
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[1] If I have a photo that is slightly out-of-focus but otherwise really nice I will sometimes manually scale to 720x or so and then use Wavelet Sharpen to produce a good-enough-for-Facebook image. After all, why throw away a great shot that's only going to be seen at a small size anyway?
Aperture 3, Mac OS X (10.6.8)