Coloured computational imaging with single pixel detectors based on a 2D discrete cosine transform
Abstract We propose and demonstrate a computational imaging technique that uses structured illumination based on a two dimensional discrete cosine transform to perform imaging with a single pixel detector. A scene is illuminated by a projector with two sets of orthogonal patterns, then by applying an inverse cosine transform to the spectra obtained from the single pixel detector a full colour image is retrieved. This technique can retrieve an image from sub Nyquist measurements, and the background noise is easily cancelled to give excellent image quality. Moreover, the experimental set up is very simple.