Abstract
Three-dimensional imaging using Time-of-flight (ToF) sensors is rapidly gaining widespread adoption in many applications due to their cost e ectiveness, simplicity, and compact size. However, the current generation of ToF cameras su ers from low spatial resolution due to physical fabrication limitations. In this paper, we propose CS-ToF, an imaging architecture to achieve high spatial resolution ToF imaging via optical multiplexing and compressive sensing. Our approach is based on the observation that, while depth is non-linearly related to ToF pixel measurements, a phasor representation of captured images results in a linear image formation model. We utilize this property to develop a CS-based technique that is used to recover high resolution 3D images. Based on the proposed architecture, we developed a prototype 1-megapixel compressive ToF camera that achieves as much as 4 × improvement in spatial resolution and 3 × improvement for natural scenes. We believe that our proposed CS-ToF architecture provides a simple and low-cost solution to improve the spatial resolution of ToF and related sensors.
Original language | English (US) |
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Pages (from-to) | 31096-31110 |
Number of pages | 15 |
Journal | Optics Express |
Volume | 25 |
Issue number | 25 |
DOIs | |
State | Published - Dec 11 2017 |
Funding
National Science Foundation (NSF) (CAREER IIS-1453192, CAREER IIS-1652633, and CCF-1527501); Office of Naval Research (ONR) (N00014-15-1-2735); Defense Advanced Research Projects Agency (DARPA) (REVEAL HR0011-16-C-0028); Texas Instruments (TI) Graduate Student Fellowship. National Science Foundation (NSF) (CAREER IIS-1453192, CAREER IIS-1652633, and CCF-1527501); O ce of Naval Research (ONR) (N00014-15-1-2735); Defense Advanced Research Projects Agency (DARPA) (REVEAL HR0011-16-C-0028); Texas Instruments (TI) Graduate Student Fellowship.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics