Resize a 100 x 100 image into a 800 x 600 image (or larger) and you will get an ugly image.

You are turning 10,000 pixels into 480,000 pixels.
The software has to manufacture (guess) the other 470,000 pixels.

They can do things like that on television crime shows by using television magic (trickery).
You can't do that in the real world.

....

Here is an example of Hollywood Magic.

1. A surveillance shot of a parking lot.
2. Zoom into the surveillance shot.
3. Special crime fighter software clears up the image.

http://img.photobucket.com/albums/v159/randol9p9/HollyWood.jpg

In reality ... I started with this picture:

http://img.photobucket.com/albums/v159/randol9p9/Reality.jpg

I degraded the picture to make it look like surveillance footage.
..(left third of image)
T cropped that to make the center image.
I cropped the original picture to make the clear image.


...
..
.