Compression sensing
Firstly, the imaging target is projected onto the DMD through an optical path system, and its reflected light is focused by a lens onto a single photodiode. The voltage value at both ends of the photodiode is a measured value X. Repeat this projection operation for N times, and then use the algorithm to construct the original image.
DMD uses digital voltage signals to control the flip of the micro lens to adjust the incident light, equivalent to a 0-1 random measurement matrix.