Here's my first attempt, Iridient everything zero, Iridients camera color profile, but tone curve linear. Sharpening Iridient Reveal, radius 0.8 by eyesight, rest default.
Well that was the thought. But
"Your attachment has failed security checks and cannot be uploaded. Please consult the forum administrator." ??
It's a 66 kB TIF containing a 70x135 px crop of the slanted edge target.