US 12,239,437 B2
Device, method, and program for determining parameter indicating shape of ear canal based on layers perpendicular to calculated center line of ear canal
Takayuki Arakawa, Tokyo (JP); and Yoshitaka Ito, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/783,699
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Dec. 13, 2019, PCT No. PCT/JP2019/048845
§ 371(c)(1), (2) Date Jun. 9, 2022,
PCT Pub. No. WO2021/117206, PCT Pub. Date Jun. 17, 2021.
Prior Publication US 2023/0027011 A1, Jan. 26, 2023
Int. Cl. A61B 5/1171 (2016.01); G01B 17/06 (2006.01); G01B 21/14 (2006.01); G06T 7/00 (2017.01); G06V 40/10 (2022.01)
CPC A61B 5/1171 (2016.02) [G01B 17/06 (2013.01); G01B 21/14 (2013.01); G06T 7/0012 (2013.01); G06V 40/10 (2022.01); G06T 2207/10072 (2013.01)] 6 Claims
OG exemplary drawing
 
3. A parameter determination method performed by a computer and comprising:
generating, based on data regarding an internal structure of an ear hole of an individual, shape of ear hole data indicating a three-dimensional shape of an ear canal of the individual;
calculating a center line of the ear canal based on the shape of ear hole data, by calculating a line connecting respective center points of ellipses approximating two-dimensional shapes of cross sections of the ear canal as the center line of the ear canal;
dividing the ear canal into a plurality of layers perpendicular to the center line; and
calculating a parameter indicating a shape of the ear canal for each of the divided layers.