Device, method, and program for determining parameter indicating shape of ear canal based on layers perpendicular to calculated center line of ear canal
AssigneeNEC Corporation
InventorsTakayuki Arakawa, Yoshitaka Ito
Life of this patent
Estimating the term…
Abstract
To easily evaluate the performance of an earphone-type device used for otoacoustic authentication at low cost. A generation unit (31) generates earhole shape data indicating the three-dimensional shape of an individual's ear canal, on the basis of data on the internal structure of an individual's earhole, a center line calculation unit (32) calculates the center line of the ear canal, on the basis of the ear canal shape data, and a dividing unit (33) divides the ear canal into a plurality of layers perpendicular to the center line, and calculates, for each of the divided layers, parameters indicating the shape of the ear canal.
Claims6
A parameter determination device comprising:
- a memory storing instructions data;
- and
- at least one processor configured to execute the instructions to perform:
- 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.
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.
A non-transitory recording medium storing a program executable by a computer to perform processing 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;
- calculating a parameter indicating a shape of the ear canal for each of the divided layers.
Dependencies are inferred from the claim text.