New feature: Add QButton to apply the baked mask as an Xseg mask

[CopaceticMeatbag]

Issue

Using iperov's awesome RTM v2 faceset my masks are 99% great in a few minutes with just a tiny bit of fixing needed. I need to fully define the xseg mask in these instances, even though 99% of it is already perfectly accurate. It would save a ton of time if I could convert the baked mask to an xseg poly, then I could quickly refine the 1% of the poly that needs a little realigning.

Suggestion

I imagine we just need to add an arbitrary number of points along the edges of the baked mask as a new poly, then reuse some of the code from canvas_finalize to save those as a mask, maybe like dflimg.set_seg_ie_polys( new_ie_poly_from_baked ), then refresh the image data to overlay the new xseg mask ready for adjusting.

I'm looking into this myself now, but I rarely use Python; hopefully if I'm trying to dig a hole underwater someone more versed in Python than me can chime in and save me some time and tell me why this won't work haha.

[pmajor74]

This is a really great idea. A feature or tool like this would be great! There are so many times I would do the generic xseg apply (having replaced my xseg model with a much deeper trained one) and at the end for me about 90% of the frames are good and just a few need touch up.

Granted another feature that would be awesome is a quicker way to scroll through the images, say a scroll bar so that you can fast scroll over to a part where you know problems will exist.