posted on Sep, 14 2016 @ 09:28 PM
I've found the only way to keep sharp image quality when resizing is to use vector images.
When you size down an image you lose the number of pixels made to make the image, and that's why the quality of the image becomes less and less the
more you scale it down (or scale it up for that matter). Vector images don't use pixels, they use polygon mathematical formulas, so you can resize
the image to your heart's content without losing resolution quality.
Take a vector image, scale it down to the size you need, and then convert it to a png or jpg file for use on the web.
But you don't have a whole heck of a lot for image choices with vectors... unless you're really good at making your own vectors (which I'm not),
otherwise you're left with having to pick through vectors that other people have made.
Another problem with vectors is that you have to have a specific program to open and edit them (ie: Adobe Illustrator or Inkscape).
I suspect that one day graphics technology will evolve to the point where you'll be able to take any kind of pixel-based image and convert it to a
vector-based image without losing the number of colour variations in the image....
But until then, our choices are somewhat limited when playing around with this stuff.
edit on 14-9-2016 by CranialSponge because: (no reason given)