US 9,813,687 B1
Image-capturing device, image-processing device, image-processing method, and image-processing program
Atsuro Okazawa, Tokyo (JP)
Assigned to OLYMPUS CORPORATION, Tokyo (JP)
Filed by OLYMPUS CORPORATION, Hachioji-shi, Tokyo (JP)
Filed on May 27, 2017, as Appl. No. 15/607,488.
Application 15/607,488 is a continuation of application No. PCT/JP2016/065130, filed on May 23, 2016.
Int. Cl. H04N 5/232 (2006.01); H04N 5/369 (2011.01); H04N 9/64 (2006.01); H04N 9/04 (2006.01); H04N 9/07 (2006.01)
CPC H04N 9/646 (2013.01) [H04N 5/23212 (2013.01); H04N 5/3696 (2013.01); H04N 9/045 (2013.01); H04N 9/07 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An image-capturing device comprising:
an image-capturing element in which a plurality of pixels, which have different spectral sensitivities, are arrayed in a two-dimensional matrix manner and in which phase-difference detection pixels are arranged as some of the pixels;
a phase-difference pixel discriminating unit that classifies the phase-difference detection pixels arranged in the image-capturing element as first pixels, the first pixels having a spectral sensitivity at which discerning degradation of image quality is more difficult for human eyes than the other of the spectral sensitivities, and second pixels which are the phase-difference detection pixels other than the first pixels;
a phase-difference pixel value correcting unit that subjects the first pixels classified by the phase-difference pixel discriminating unit to correction processing of a lower precision than that for the second pixels; and
a number-of-pixels-reducing unit that performs number-of-pixels reduction processing that outputs a single pixel value on the basis of pixel values of a prescribed number of the pixels of the image-capturing element,
wherein, the phase-difference pixel discriminating unit classifies the phase-difference detection pixels as the first pixels when a density of the phase-difference detection pixels having a spectral sensitivity in a blue wavelength band with respect to all pixels having the spectral sensitivity in a blue wavelength band within an image after the number-of-pixels reduction processing is higher than a prescribed first threshold, and
the phase-difference pixel value correcting unit subjects the first pixels to the correction processing on the basis of an image before the number-of-pixels reduction processing.