Is it possible to invert a TIFF file from Negative to Positive or visa versa with any tasks in Automation Engine?
Answer
No, this is not possible with the current version of Automation Engine. But there is no restriction on screened or unscreened TIFFs as this simply changes the bits from 0 to 1 or visa versa.
So, this can be done manually or with scripting in Adobe® Photoshop®.