I want to shine a 5-figure lumens projector steeply angled upwards on the side of an apartment building.
My projection mapping task is very rudimentary for a projection mapper, but more complex than a projector's built in keystone.
I need extreme keystone correction far beyond the projector's adjustment range.
Here are my diagrams.
(Bottom edge will be above roughly the second storey level, due to steep-upwards projection angle)
As many here probably know already, the top edge stretches a lot more than the bottom edge, and the top edge is much dimmer. (Fortunately the super excess lumens of the projector compensates). So I want to build compensating corrections into a custom-processed video file purposely generated for playback on this steeply-angled-upwards projector. I have to intentionally play a portrait video distorted into a 16:9 signal because the 16:9 projector is vertically stretching due to extreme angle into something more suitable for embedding a portrait video. So there's some weird aspect ratio remapping. Focus is not a problem (top and bottom is almost the same, the lenses are really good at the distances used), so I'll live with any imperfections.
Everything works perfectly, I now just need to pre-distort a video file.
My Questions:
Since this is a simpler projection mapping task than the complex paid projection mappers but too complex for a projector's built-in keystone. I'm looking at a simple "Extreme Keystone" task that just barely veers into low-end projection mapping.
How easy is it to use Madmapper to create a projection map that is merely an enhanced keystone correction:
(A) brightness gradient correction
(B) vertical stretch nonlinearity correction
(C) major aspect ratio distortion since I'm embedding a squat portrait video in a 16:9 video file
(D) keystone with intentional corner clipping
(E) Black fill for outside boundaries (to avoid stray light)
I presume Madmapper can already do it all, and I should try out the trial edition -- but it almost looks like Madmapper may be massive overkill (Like using a giant battleship cruiser to deliver one pizza)? Or it already easily does this with reasonably minimal steps?
By the way, this is a community weekend project on a loaner lumen cannon and family-budget only. That's why we're fiddling with free tools but are considering inexpensive projection mappers such as Madmapper. But the 35-Euro rental may actually be acceptable if Madmapper is easy enough to do this extreme keystoning.
Thank you!