Title:
OPTICAL TIME-OF-FLIGHT RANGE-FINDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/075945
Kind Code:
A1
Abstract:
In this optical time-of-flight range-finding device, a basic exposure period corresponding to conventional long-term accumulation is divided into a plurality of sub exposure periods. During one cyclic period, in which a plurality of the sub exposure periods complete one cycle, the electric charge accumulated during a sub exposure period is retained without being reset. A measured value for short-term exposure is obtained from the amount of electric charge accumulated during one cyclic period. A measured value for long-term exposure is obtained by integrating the amounts of electric charge accumulated during a plurality of cyclic periods. Both the measured value for short-term exposure and the measured value for long-term exposure can be obtained from one pixel (the same pixel). As a result, the dynamic range is expanded without restricting the arrangement of pixels, the design of the light-receiving optical system, or the receiving state of reflected light.
Inventors:
NAGAI TOSHIAKI (JP)
Application Number:
PCT/JP2015/005649
Publication Date:
May 19, 2016
Filing Date:
November 12, 2015
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01C3/06; G01S7/4914; G01S7/4915; G01S17/36; G01S17/89; H04N5/225; H04N5/341; H04N5/353; H04N5/3745
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Other References:
TOMOO MITSUNAGA: "Spatially Varying Exposure: a Wide Dynamic Range Imaging Method", IPSJ SIG NOTES, COMPUTER VISION AND IMAGE MEDIA (CVIM, vol. 2005, no. 4, January 2005 (2005-01-01), pages 155 - 162
S.NAYAR ET AL.: "High Dynamic Range Imaging:Spatially Varying Pixel Exposures.", IEEE CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION (CVPR, vol. 1, June 2000 (2000-06-01), pages 472 - 479
S.G.NARASIMHAN ET AL.: "Enhancing Resolution Along Multiple Imaging Dimensions Using Assorted Pixels.", IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, vol. 27, no. 4, April 2005 (2005-04-01), pages 518 - 530
S.NAYAR ET AL.: "High Dynamic Range Imaging:Spatially Varying Pixel Exposures.", IEEE CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION (CVPR, vol. 1, June 2000 (2000-06-01), pages 472 - 479
S.G.NARASIMHAN ET AL.: "Enhancing Resolution Along Multiple Imaging Dimensions Using Assorted Pixels.", IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, vol. 27, no. 4, April 2005 (2005-04-01), pages 518 - 530
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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