3d astigmatic depth sensing camera

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Three-dimensional displays have become increasingly present in consumer markets. However, the ability to capture threedimensional images inexpensively and without major modifications to current cameras is uncommon. Our goal is to create a modification to a common commercial camera that allows a three dimensional reconstruction. We desire such an imaging system to be inexpensive and easy to use. Furthermore, we require that any three-dimensional modification to a camera does not reduce its resolution. Here we present a possible solution to this problem. A commercial digital camera is used with a projector system with astigmatic focus to capture images of a scene. By using an astigmatic projected pattern we can create two different focus depths for horizontal and vertical features of the projected pattern, thereby encoding depth. This projector could be integrated into the flash unit of the camera. By carefully choosing a pattern we are able to exploit this differential focus in image processing. Wavelet transforms are performed on the image that pick out the projected pattern. By taking ratios of certain wavelet coefficients we are able to correlate the distance an object at a particular transverse position is from the camera to the contrast ratios. We present our information regarding construction, calibration, and images produced by this system. The nature of linking a projected pattern design and image processing algorithms will be discussed.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8129
DOIs
StatePublished - 2011
Externally publishedYes
EventNovel Optical Systems Design and Optimization XIV - San Diego, CA, United States
Duration: Aug 22 2011Aug 22 2011

Other

OtherNovel Optical Systems Design and Optimization XIV
CountryUnited States
CitySan Diego, CA
Period8/22/118/22/11

Fingerprint

Sensing
Camera
Cameras
cameras
projectors
Projector
image processing
Image Processing
Image processing
Three-dimensional Display
Three-dimensional Reconstruction
Three-dimensional
Design Patterns
digital cameras
Digital Camera
Wavelet Coefficients
Digital cameras
Flash
Imaging System
wavelet analysis

Keywords

  • 3D Imaging
  • Astigmatic pattern
  • Depth measurement

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Birch, G. C., Tyo, J. S., & Schwiegerling, J. T. (2011). 3d astigmatic depth sensing camera. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8129). [812903] https://doi.org/10.1117/12.893826

3d astigmatic depth sensing camera. / Birch, Gabriel C.; Tyo, J Scott; Schwiegerling, James T.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8129 2011. 812903.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Birch, GC, Tyo, JS & Schwiegerling, JT 2011, 3d astigmatic depth sensing camera. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8129, 812903, Novel Optical Systems Design and Optimization XIV, San Diego, CA, United States, 8/22/11. https://doi.org/10.1117/12.893826
Birch GC, Tyo JS, Schwiegerling JT. 3d astigmatic depth sensing camera. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8129. 2011. 812903 https://doi.org/10.1117/12.893826
Birch, Gabriel C. ; Tyo, J Scott ; Schwiegerling, James T. / 3d astigmatic depth sensing camera. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8129 2011.
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