US 9,808,147 B2
Image processing apparatus and endoscope
Katsuhiro Kanamori, Nara (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Nov. 17, 2014, as Appl. No. 14/542,771.
Application 14/542,771 is a continuation of application No. PCT/JP2013/005614, filed on Sep. 24, 2013.
Claims priority of application No. 2013-027304 (JP), filed on Feb. 15, 2013.
Prior Publication US 2015/0141753 A1, May 21, 2015
Int. Cl. A62B 1/04 (2006.01); H04N 9/47 (2006.01); A61B 1/06 (2006.01); G02B 23/26 (2006.01); H04N 5/225 (2006.01); A61B 1/00 (2006.01); H04N 5/235 (2006.01); H04N 9/04 (2006.01); H01L 27/146 (2006.01); A61B 1/04 (2006.01); G02B 5/20 (2006.01); G02B 5/30 (2006.01); G02B 23/24 (2006.01); G02B 27/28 (2006.01)
CPC A61B 1/0646 (2013.01) [A61B 1/00009 (2013.01); A61B 1/04 (2013.01); G02B 23/26 (2013.01); H01L 27/14627 (2013.01); H01L 27/14629 (2013.01); H04N 5/2254 (2013.01); H04N 5/2256 (2013.01); H04N 5/2354 (2013.01); H04N 9/045 (2013.01); G02B 5/201 (2013.01); G02B 5/3083 (2013.01); G02B 23/2407 (2013.01); G02B 27/285 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An image processing apparatus comprising:
an illuminating section which sequentially irradiates an object with a first illuminating light beam that is polarized in a first direction and with a second illuminating light beam that is polarized in a second direction that intersects with the first direction in a polarization image capturing mode;
an image sensor including a polarization mosaic array in which a plurality of polarizers with mutually different polarization transmission axis directions are arranged and a photosensing element array which receives light that has been transmitted through each said polarizer and which outputs a signal;
a polarization mosaic processing section which obtains, in the polarization image capturing mode, a first polarization image to be generated based on a signal representing light that has been transmitted through a polarizer that has the polarization transmission axis in a direction parallel to the first direction while the object is being irradiated with the first illuminating light beam, a second polarization image to be generated based on a signal representing light that has been transmitted through a polarizer that has the polarization transmission axis in a direction intersecting with the first direction while the object is being irradiated with the first illuminating light beam, a third polarization image to be generated based on a signal representing light that has been transmitted through a polarizer that has the polarization transmission axis in a direction parallel to the second direction while the object is being irradiated with the second illuminating light beam, and a fourth polarization image to be generated based on a signal representing light that has been transmitted through a polarizer that has the polarization transmission axis in a direction intersecting with the second direction while the object is being irradiated with the second illuminating light beam;
a depressed region detecting section which detects a depressed region on the surface of the object based on both the first and second polarization images that form one pair and the third and fourth polarization images that form another pair; and
an image forming section which forms an image that represents the depressed region on the object's surface in an enhanced form.