Snapshot compressive spectral depth imaging from coded aberrations

Miguel Marquez, Pablo Meza, Fernando Rojas, Henry Arguello, ESTEBAN MAURICIO VERA ROJAS

Research output: Contribution to journalArticlepeer-review

Abstract

Compressive spectral depth imaging (CSDI) is an emerging technology aiming to reconstruct spectral and depth information of a scene from a limited set of two-dimensional projections. CSDI architectures have conventionally relied on stereo setups that require the acquisition of multiple shots attained via dynamically programmable spatial light modulators (SLM). This work proposes a snapshot CSDI architecture that exploits both phase and amplitude modulation and uses a single image sensor. Specifically, we modulate the spectral-depth information in two steps. Firstly, a deformable mirror (DM) is used as a phase modulator to induce a focal length sweeping while simultaneously introducing a controlled aberration. The phase-modulated wavefront is then spatially modulated and spectrally dispersed by a digital micromirror device (DMD) and a prism, respectively. Therefore, each depth plane is modulated by a variable phase and binary code. Complimentary, we also propose a computational methodology to recover the underlying spectral depth hypercube efficiently. Through simulations and our experimental proof-of-concept implementation, we demonstrate that the proposed computational imaging system is a viable approach to capture spectral-depth hypercubes from a single image.

Original languageEnglish
Pages (from-to)8142-8159
Number of pages18
JournalOptics Express
Volume29
Issue number6
DOIs
StatePublished - 15 Mar 2021
Externally publishedYes

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