-resize vs -thumb

[nah0y]

Hello!
First, thanks a lot for the AWESOME tool..

We can achieve the same result using :
-thumb w h
-resize -ratio w h

What's the difference here?
Does the -thumb command already uses -resize -ratio behind the scene? Possible adding -rtype quick too?

Thanks!

[helmut]

What's the difference here?Thanks!

I assume that...
... -thumb extracts the thumbnail embedded in the image and resizes it to the specified width/height.
... -resize extracts the image and resizes it to the specified width/height.

nConvert might use the image data if there is no embedded thumbnail available in the image.

But I'm not familiar with nConvert and this is all guessing...

[nah0y]

I didn't know some images had the thumbnail in them too! Good to know. Thanks for answering!
Still waiting for a more precise answer though