For problems associated with photoscanning low-contrast objects projecting light onto the scene is one clever way of ensuring a good match for stereo images. It’s nothing new, and remains a focus within computer vision research as it can reduce the need for camera calibration in stereo setups, such as the bumblebee, which are used for industrial applications. Structured light setups have been suggested for low resolution blurry imagery such as those in underwater cameras, where solutions to the correspondence problem are shaky at best. I know of one PhD student who’s focusing on accurate camera calibration using these methods, but I wonder if projecting an artificial texture on an object with low contrast and using multi-view stereo with a self-calibration could be equally as useful. Structured light scanners do just this for two cameras with a laser beam, but I’m thinking about if you could just do it with a home projector or similar and keep it constant throughout images.
The first figure of this web page (from 12 years ago!) exemplifies the idea and can solve for camera positions/intrinsics using the laser. There are other good ideas with this in mind from this University of Washington lecture slide set from 6 years ago, their researchers always seem to be ahead of the game!