Optical neural networks hold promise for image processing

https://techxplore.com/news/2023-04-optical-neural-networks-image.html

"filter relevant information from scene before visual image camera detected... faster, smaller, energy-efficient image sensors... compression ratio 800-to-1 classify cell images flow cytometers and measure and identify objects in 3D... light through matrix-vector multiplications compresses data 4 pixels... sort information yielding compression higher signal-to-noise ratio per camera pixel... cancer detection... useful where low-power sensing or computing needed, for example, image sensing on satellite"