Programmable aperture camera using LCoS

Hajime Nagahara, Changyin Zhou, Takuya Watanabe, Hiroshi Ishiguro, Shreee K. Nayar

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Since 1960s, aperture patterns have been studied extensively and a variety of coded apertures have been proposed for various applications, including extended depth of field, defocus deblurring, depth from defocus, light field acquisition, etc. Researches have shown that optimal aperture patterns can be quite different due to different applications, imaging conditions, or scene contents. In addition, many coded aperture techniques require aperture patterns to be temporally changed during capturing. As a result, it is often necessary to have a programmable aperture camera whose aperture pattern can be dynamically changed as needed in order to capture more useful information. In this paper, we propose a programmable aperture camera using a Liquid Crystal on Silicon (LCoS) device. This design affords a high brightness contrast and high resolution aperture with a relatively low light loss, and enables one change the pattern at a reasonably high frame rate. We build a prototype camera and evaluate its features and drawbacks comprehensively by experiments. We also demonstrate three coded aperture applications in defocus deblurring, depth from defocus and light field acquisition.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalIPSJ Transactions on Computer Vision and Applications
Volume4
DOIs
Publication statusPublished - Aug 17 2012

Fingerprint

Liquid crystals
Cameras
Silicon
Luminance
Imaging techniques
Experiments

All Science Journal Classification (ASJC) codes

  • Computer Vision and Pattern Recognition

Cite this

Nagahara, H., Zhou, C., Watanabe, T., Ishiguro, H., & Nayar, S. K. (2012). Programmable aperture camera using LCoS. IPSJ Transactions on Computer Vision and Applications, 4, 1-11. https://doi.org/10.2197/ipsjtcva.4.1

Programmable aperture camera using LCoS. / Nagahara, Hajime; Zhou, Changyin; Watanabe, Takuya; Ishiguro, Hiroshi; Nayar, Shreee K.

In: IPSJ Transactions on Computer Vision and Applications, Vol. 4, 17.08.2012, p. 1-11.

Research output: Contribution to journalArticle

Nagahara, H, Zhou, C, Watanabe, T, Ishiguro, H & Nayar, SK 2012, 'Programmable aperture camera using LCoS', IPSJ Transactions on Computer Vision and Applications, vol. 4, pp. 1-11. https://doi.org/10.2197/ipsjtcva.4.1
Nagahara, Hajime ; Zhou, Changyin ; Watanabe, Takuya ; Ishiguro, Hiroshi ; Nayar, Shreee K. / Programmable aperture camera using LCoS. In: IPSJ Transactions on Computer Vision and Applications. 2012 ; Vol. 4. pp. 1-11.
@article{471d8eaa7bb5426fb684e009f0ca3f6e,
title = "Programmable aperture camera using LCoS",
abstract = "Since 1960s, aperture patterns have been studied extensively and a variety of coded apertures have been proposed for various applications, including extended depth of field, defocus deblurring, depth from defocus, light field acquisition, etc. Researches have shown that optimal aperture patterns can be quite different due to different applications, imaging conditions, or scene contents. In addition, many coded aperture techniques require aperture patterns to be temporally changed during capturing. As a result, it is often necessary to have a programmable aperture camera whose aperture pattern can be dynamically changed as needed in order to capture more useful information. In this paper, we propose a programmable aperture camera using a Liquid Crystal on Silicon (LCoS) device. This design affords a high brightness contrast and high resolution aperture with a relatively low light loss, and enables one change the pattern at a reasonably high frame rate. We build a prototype camera and evaluate its features and drawbacks comprehensively by experiments. We also demonstrate three coded aperture applications in defocus deblurring, depth from defocus and light field acquisition.",
author = "Hajime Nagahara and Changyin Zhou and Takuya Watanabe and Hiroshi Ishiguro and Nayar, {Shreee K.}",
year = "2012",
month = "8",
day = "17",
doi = "10.2197/ipsjtcva.4.1",
language = "English",
volume = "4",
pages = "1--11",
journal = "IPSJ Transactions on Computer Vision and Applications",
issn = "1882-6695",
publisher = "Information Processing Society of Japan",

}

TY - JOUR

T1 - Programmable aperture camera using LCoS

AU - Nagahara, Hajime

AU - Zhou, Changyin

AU - Watanabe, Takuya

AU - Ishiguro, Hiroshi

AU - Nayar, Shreee K.

PY - 2012/8/17

Y1 - 2012/8/17

N2 - Since 1960s, aperture patterns have been studied extensively and a variety of coded apertures have been proposed for various applications, including extended depth of field, defocus deblurring, depth from defocus, light field acquisition, etc. Researches have shown that optimal aperture patterns can be quite different due to different applications, imaging conditions, or scene contents. In addition, many coded aperture techniques require aperture patterns to be temporally changed during capturing. As a result, it is often necessary to have a programmable aperture camera whose aperture pattern can be dynamically changed as needed in order to capture more useful information. In this paper, we propose a programmable aperture camera using a Liquid Crystal on Silicon (LCoS) device. This design affords a high brightness contrast and high resolution aperture with a relatively low light loss, and enables one change the pattern at a reasonably high frame rate. We build a prototype camera and evaluate its features and drawbacks comprehensively by experiments. We also demonstrate three coded aperture applications in defocus deblurring, depth from defocus and light field acquisition.

AB - Since 1960s, aperture patterns have been studied extensively and a variety of coded apertures have been proposed for various applications, including extended depth of field, defocus deblurring, depth from defocus, light field acquisition, etc. Researches have shown that optimal aperture patterns can be quite different due to different applications, imaging conditions, or scene contents. In addition, many coded aperture techniques require aperture patterns to be temporally changed during capturing. As a result, it is often necessary to have a programmable aperture camera whose aperture pattern can be dynamically changed as needed in order to capture more useful information. In this paper, we propose a programmable aperture camera using a Liquid Crystal on Silicon (LCoS) device. This design affords a high brightness contrast and high resolution aperture with a relatively low light loss, and enables one change the pattern at a reasonably high frame rate. We build a prototype camera and evaluate its features and drawbacks comprehensively by experiments. We also demonstrate three coded aperture applications in defocus deblurring, depth from defocus and light field acquisition.

UR - http://www.scopus.com/inward/record.url?scp=84864946683&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864946683&partnerID=8YFLogxK

U2 - 10.2197/ipsjtcva.4.1

DO - 10.2197/ipsjtcva.4.1

M3 - Article

VL - 4

SP - 1

EP - 11

JO - IPSJ Transactions on Computer Vision and Applications

JF - IPSJ Transactions on Computer Vision and Applications

SN - 1882-6695

ER -