you see the blurry one thats 128x128
you see the one a little more detailed that's the 256x256 Gees.
Edit:why the hell am i even bothering?
drago you are pretty close.
sharpen means accentuating the dark and bright pixel mostly
if you sharpen a pic 2 much it will result in alot of white and black dots.
but used right it can improve the way a picture/texture looks.