Troubleshooting an image

Question

I have an image, below, that seems "soft" and I'd like to know why. Possibly it was resized from something like 3000 x 3000 and not sharpened. Possibly it's a 500 x 500 image originally, expanded to 960 x 960. Is there a way to determine what's wrong with it?

Thanks

Answer 1

Maybe you'll want to check the image-processing tag at DSP StackExchange.