Friday, December 01, 2017

Compressive Sensing Improves ToF Camera Spatial Resolution

Northwestern University, Evanston, IL and Rice University, Houston, TX researches publish a paper "CS-ToF: High-resolution compressive time-of-flight imaging" by Fengqiang Li, Huaijin Chen, Adithya Pediredla, Chiakai Yeh, Kuan He, Ashok Veeraraghavan, and Oliver Cossairt. The authors propose to use a dynamically changing illumination pattern to improve ToF sensor resolution:

"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."


  1. The resolution gain is archeived by using a digital mirror device. I think this should be mentioned in the text, as this dramtically increases the system complexity.

    1. Correct. It's shown on Fig. 1 - this is the reason the figure is here.

    2. Compressive Sensing in real world optics is using DMDs all over place. I barely can remember it was done any different than using DMDs in recent times.


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