[Image-SIG] Upsample an image

[Fredrik Lundh]

Ahmad Affzan Abdullah wrote:

> When I tried downsample an image using im.resize and then upsampled it to 
> get to the original size, it looked a bit blurry and lost a lot of details.

that's expected: if you downsample an image, you lose information.  once 
lost, there's no way to get it back.

(if this wasn't the case, image compression would be a lot easier than 
it is...)

</F>