Compressed sensing! What Terence Tao uses to sell math funding!!
https://www.youtube.com/watch?v=EE9AETSoPHw&t=44
https://www.instructables.com/Single-Pixel-Camera-Using-an-L...
(Okay not the same guy, but I wanted to share this somewhat related "extreme" camera project)
Is this compressed sensing though? The description says "Sensor 30x30 pixels, 64 colors (ADNS-3090 if you wanna look it up)", so definitely not a single-pixel camera.
I wonder how much quality you could get out of that sensor.