Batch inverting colours

[EasySlideScan]

Hi Guys

I need a program which will invert the colours on digital images for me, it turn a pos into a neg.

I've about 15,000 images to convert, so need a program which will do it in batches.

Any ideas?

 

[goffski]

Photoshop? Do one and record it as an action, then just run this on the rest of them from Bridge.

 

[EasySlideScan]

Photoshop? Do one and record it as an action, then just run this on the rest of them from Bridge.

good idea, but hte machines these images are have no protoshop and I can't really move them to a place where we have photo shop. Really looking for a small app that does it....