Hi Omipo,
first of all, your VueScan-TIF contains 4 channels / pixel. Probably RT ignores the 4th channel. You might want to setup VueScan so that it already incorporates the IR-channel into the RGB-image (i.e. applies the dust and scratch removal).
Inverting in RT is easy in the Colour management tab with the RGB-curves. Removing the orange mask needs to set the shadow and highlight points for each channel to where the histogram is really occupied. Unfortunately I see no easy way to do this in RT – perhaps somebody can point out how to do this.
I used imageJ to do all this to your image as follows:
image crop
move to channel 4
image stacks delete slice
select channel 1
edit invert
image adjust B&C auto, apply
select channel 2
edit invert
image adjust B&C auto, apply
select channel 3
edit invert
image adjust B&C auto, apply
file save as tiff
The resulting RGB image can then be processed further in RT.
Why not do the inversion and removal of the orange mask in VueScan (which would also incorporate the appropriate film profile!) and then process the resulting image in RT?
I get best results using ColorPerfect on “raw” images from VueScan or SilverFast for inversion and removal of the orange mask and then by process the resulting RGB-image in RT and also with the Nik-collection.
Hermann-Josef