Low-Pass Filtering of Compressive Imaging Measurements to Infer Light Level Variation

摘要: An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, also obtains samples background level (BGLL). The BGLL may be used to compensate the CS for variations in BGLL. includes: modulator spatially modulate stream with spatial patterns, lens concentrate modulated onto detector. obtained various ways: (a) injecting calibration patterns among patterns; (b) measuring complementary reflected by digital micromirrors secondary output path; (c) separating portion from optical input (d) low-pass filtering measurements; (e) employing power meter its own separate path. Also, high-pass filtered attenuate variation.