Resize to a minimum

Hello,

I’m looking for a plugin to do just the opposite as this one, instead of resize large images, I need to resize images shorter than Xpx to a minimum width on upload.

Is there any way modifiying a bit this plugin to do that?

I don’t know if that’s a lot more complex, the plugin already do the resize to a concrete px, but it ignores images shorter than the size, what I need its resize shorter ones and ignore larger ones.

Thanks