Compression of multiple 3D color scenes with experimental recording and reconstruction

• Published in: Optics and lasers in engineering 2018-11, Vol.110, p.18-23
• Main Authors: Trejos, Sorayda, Ramirez, John Fredy Barrera, Zea, Alejandro Velez, Tebaldi, Myrian, Torroba, Roberto
• Format: Article
• Language: English
• Subjects: Color; Compression; Multiplexing; Phase only holograms; Sampling
• ISSN: 0143-8166; 1873-0302
• DOI: 10.1016/j.optlaseng.2018.04.020

•We present a technique for compressing data from 3D color scenes with cross-talk free selective reconstruction.•We use off-axis holography to record holograms of the RGB color channels of a 3D scene.•The color channels are processed and combined into a single phase only hologram that allows one step full color reconstruction.•The phase only holograms are sampled with orthogonal random binary masks and then multiplexed, resulting in a data volume reduction of 97.81%.•We perform experimental full color reconstruction of the compressed phase only holograms and compare our technique with the JPEG compression algorithm. We present for the first time a method for compression of 3D color scenes with experimental recording and reconstruction, including scene multiplexing. An experimental setup allows separately registering three off-axis Fourier holograms corresponding to the RGB color channels of a 3D scene. Then, the optical field data contained in each hologram is extracted and their phase is retained. The phases associated to each color channel are spatially arranged to get a single phase-only optical field for the experimental full color reconstruction in another optical setup. This process is then further developed to include different 3D color scenes by multiplying the arranged phase-only optical fields corresponding to each scene by complementary binary masks. Three sampled scenes are multiplexed giving a compression in the data volume up to 97.81% in our experiments. The technique used in the context of multiplexing allows a substantial data volume reduction and the appropriate reconstruction of each color scene without cross-talk and in a single step.