Title:
IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/195863
Kind Code:
A1
Abstract:
[Problem] To provide an imaging device capable of reducing occurrence of flicker in an active illumination system by combining a plurality of light sources of which the wavelength bands are different from each other and by reducing a color difference among the light sources of required wavelengths. [Solution] The imaging device is provided with: a plurality of light sources 17 that emit light having different wavelengths; a light source selecting unit 22 which selects, from among the light sources 17, a plurality of selected light sources each of which emits light having a specified wavelength specified on the basis of the characteristics of an object 27 to be imaged; a light source extracting unit 24 which extracts, from among non-selected light sources other than the selected light sources, one that has such a wavelength as to, when the one non-selected light source and one of the plurality of selected light sources are combined, reduce a color difference between the one selected light source and the other selected light sources; the light source 17 that illuminates the object 27 to be imaged, by using a light source obtained by combining the selected one of the selected light sources and the extracted non-selected light source while sequentially switching the light source for each of the selected light sources; and an imaging element 11 that images the object 27 to be imaged, by using the illuminating light source.
Inventors:
NAGAHARA HAJIME (JP)
IKEDA TETSUO (JP)
OHSAKI MAKOTO (JP)
IKEDA TETSUO (JP)
OHSAKI MAKOTO (JP)
Application Number:
PCT/JP2017/017866
Publication Date:
November 16, 2017
Filing Date:
May 11, 2017
Export Citation:
Assignee:
UNIV KYUSHU NAT UNIV CORP (JP)
International Classes:
G01J3/10; G01J3/46; G01N21/01; G03B15/00; G03B15/02; G03B15/05; H04N5/225; H04N5/235
Foreign References:
| JP2005069965A | 2005-03-17 | |||
| JP2004198255A | 2004-07-15 | |||
| JP2008102137A | 2008-05-01 |
Other References:
MAKOTO OSAKI ET AL.: "Flickerless Active LED Shomei ni yoru Hyper Spectrum Imaging", KENKYU HOKOKU COMPUTER VISION AND IMAGE MEDIA(CVIM, 5 May 2016 (2016-05-05), pages 1 - 7, Retrieved from the Internet [retrieved on 20170418]
Attorney, Agent or Firm:
HIRAI Yasuo (JP)
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