Is upsizing/zooming more effective when using "simple" ratios?

[rpcrowe]

Sorry - I never realized some people felt that way about their pictures. It sounds like you only put "finished" pictures out there but there are a huge number of potentially great shots that only need a little editing to bring them out. Those are the ones that interest me the most - I like creating beauty. It's hard for me to see the harm if no one else ever sees them, but I think I understand where you're coming from.

If you like "creating beauty" why don't you get your own camera and create! Or get permission to use, rather than to steal other person's property and have your company make money doing so. After-all, I am sure that your aim in this case is not altruistically to enlarge the world's stock of beautiful pictures!

We often see members edit other members images posted on this site. I often do this myself. However, this is not done in any commercial venture, simply to illustrate how another person could edit the image. After-all, for all of us, this is a learning, not an earning site, as well as an enjoyable site to visit.

Sorry if I came across pretty strong. Intellectual property is one on my sore points...

[xpatUSA]

<>The answer is clear enough -- low-pass the image to get the frequency content of the image below the Nyquist limit for the smaller image before resampling. And by the way, using extremely noisy images is a good way to test the integrity of your resampling algorithm. HTH.

Well said, Tom - exactly why I presented the OP with an out-of-focus image to play with. Was probably being too subtle with that, though.