B&W reversed for received FAX

[Whitehill]

My HP all-in-one receives faxes and saves them to my computer. However, it saves a negative with black and white reversed - and they print that way. HP support is useless and so is, so far, the user forum.

Forget the printer. Is there a quick / easy way to unreverse an image?

 

[ElDiabloConCaca]

Photoshop -> Image -> Adjustments -> Invert

Or, just Command-I.

I believe GraphicConverter can also do this, and may be able to do it automatically or in a batch.