Measurement dimensions compressed spectral imaging with a single point detector

•We realize spectral imaging with a single pixel detector without scanning.•Compressed sensing is implemented twice in spatial and spectral domains.•The detection dimensions of both the spatial and spectral detections are reduced.•Image information of space and spectrum are both sub-sampled.•The influence factors for imaging quality are analyzed.

An experimental demonstration of spectral imaging with measurement dimensions compressed has been performed. With the method of dual compressed sensing (CS) we derive, the spectral image of a colored object can be obtained with only a single point detector, and sub-sampling is achieved in both spatial and spectral domains. The performances of dual CS spectral imaging are analyzed, including the effects of dual modulation numbers and measurement noise on the imaging quality. Our scheme provides a stable, high-flux measurement approach of spectral imaging.