US 9,811,898 B2
Image analyzing apparatus and program
Hiroyuki Hishida, Koto-ku (JP); Koichi Inagaki, Koto-ku (JP); Takeshi Nakamura, Koto-ku (JP); Takashi Michikawa, Bunkyo-ku (JP); and Hiromasa Suzuki, Bunkyo-ku (JP)
Assigned to IHI CORPORATION, Koto-ku (JP); and THE UNIVERSITY OF TOKYO, Bunkyo-ku (JP)
Appl. No. 15/25,799
Filed by IHI CORPORATION, Koto-ku (JP); and The University of Tokyo, Bunkyo-ku (JP)
PCT Filed Sep. 29, 2014, PCT No. PCT/JP2014/075945
§ 371(c)(1), (2) Date Mar. 29, 2016,
PCT Pub. No. WO2015/046530, PCT Pub. Date Apr. 2, 2015.
Claims priority of application No. 2013-204596 (JP), filed on Sep. 30, 2013.
Prior Publication US 2016/0232653 A1, Aug. 11, 2016
Int. Cl. G06K 9/00 (2006.01); G06T 7/00 (2017.01); G01N 23/04 (2006.01); G01N 21/88 (2006.01); G06K 9/52 (2006.01); G06K 9/62 (2006.01); G06T 1/20 (2006.01); G06T 7/60 (2017.01)
CPC G06T 7/001 (2013.01) [G01N 21/8851 (2013.01); G01N 23/04 (2013.01); G06K 9/52 (2013.01); G06K 9/6215 (2013.01); G06K 9/6267 (2013.01); G06T 1/20 (2013.01); G06T 7/0006 (2013.01); G06T 7/60 (2013.01); G01N 2021/8887 (2013.01); G01N 2223/615 (2013.01); G06T 2200/04 (2013.01); G06T 2207/10028 (2013.01); G06T 2207/10081 (2013.01); G06T 2207/20036 (2013.01); G06T 2207/30108 (2013.01); G06T 2207/30164 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An image analyzing apparatus for extracting voids from a three-dimensional image of a fiber-reinforced composite material, the image analyzing apparatus comprising:
a processor which executes image processing to the three-dimensional image, wherein the processor:
binarizes the three-dimensional image and creates a binary image;
transforms the binary image into a distance and creates a distance image;
executes closing processing to the binary image by using the distance image;
extracts voids from differences between images before and after the closing processing;
among the extracted voids, classifies voids that are adjacent to a background voxel as open voids, and classifies voids that are not adjacent to a background voxel as closed voids;
executes opening processing to the open voids in order to eliminate fake voids; and
in the closing processing:
executes expansion processing to the binary image by dividing the binary image into a plurality of two-dimensional images, expanding each of the plurality of two-dimensional images by using the distance image corresponding to each of the plurality of two-dimensional images, and calculating a sum set of the plurality of two-dimensional images that were expanded, and
executes contraction processing to the binary image that underwent the expansion processing by dividing the binary image that underwent the expansion processing into a plurality of two-dimensional images, contracting each of the plurality of two-dimensional images by using the distance image corresponding to each of the plurality of two-dimensional images that were divided, and calculating a sum set of the plurality of two-dimensional images that were contracted.