Chinese Optics Letters, 2016, 14 (6): 060901, Published Online: Aug. 3, 2018
Fringe contrast enhancement of digital off-axis hologram via sparse representation Download: 809次
Abstract
This Letter presents a novel approach to enhance the fringe contrast (visibility) in a digital off-axis hologram digitally, which can save several adjustment procedures. In the approach, we train a pair of coupled dictionaries from a low fringe contrast hologram and a high one of the same specimen, use the dictionaries to sparse code the input hologram, and finally output a higher fringe contrast hologram. The sparse representation shows good adaptability on holograms. The experimental results demonstrate the benefit of low noise in a three-dimensional profile and prove the effectiveness of the approach.
Yuan Hong, Tielin Shi, Yichun Zhang, Guanglan Liao. Fringe contrast enhancement of digital off-axis hologram via sparse representation[J]. Chinese Optics Letters, 2016, 14(6): 060901.