Optical measurement method, optical measurement apparatus, and non-transitory computer readable medium
An object of the present disclosure is to provide an optical measurement method, an optical measurement apparatus, and a non-transitory computer readable medium capable of specifying the position of a pore. The optical measurement method includes first, second, and third steps. In the first step (ST 11 ), first 3D tomographic image data is acquired from a skin by using optical coherence tomography. In the second step (ST 12 ), a line shown in a second planar image (B 2 ) at a second depth is removed from a first planar image (B 1 ) at a first depth, the second depth being deeper than the first depth. In the third step (ST 13 ), a position of a pore is specified from the first planar image (B 1 ) from which the line has been removed.
1. An optical measurement method comprising:
a step of removing, from a first planar image at a first depth in a first three-dimensional tomographic image data acquired from a skin by using optical coherence tomography, a line shown in a second planar image at a second depth deeper than the first depth; and
a step of specifying a position of a pore from the first planar image from which the line has been removed.
2. The optical measurement method according to claim 1 , wherein in the step of specifying the position of the pore, the position of the pore is specified by detecting a thickness of a line shown in the first planar image.
3. The optical measurement method according to claim 1 , further comprising:
a step of positioning a measuring instrument of an optical interferometer so as to be opposed to the skin with a penetration part interposed therebetween, and acquiring a penetration part surface image showing a surface of the penetration part by using the optical coherence tomography; and
a step of removing a line shown in the penetration part surface image from the first planar image.
4. The optical measurement method according to claim 1 , further comprising, after performing the step of specifying the position of the pore, a step of displaying a hair of which the position of the pore has been specified in a three-dimensional manner.
5. The optical measurement method according to claim 1 , further comprising:
a step of acquiring at least one second 3D tomographic image data showing a part of the skin different from a part of the skin shown by the first 3D tomographic image data, the part of the skin shown by the second 3D tomographic image data including the position of the pore specified from the first 3D tomographic image data;
a step of specifying the position of the pore from the second 3D tomographic image data; and
a step of comparing the position of the pore specified from the first 3D tomographic image data with the position of the pore specified from the second 3D tomographic image data.
6. The optical measurement method according to claim 1 , further comprising a step of acquiring a plurality of tomogram data each showing the pore based on an inclination of the hair at the pore.
7. The optical measurement method according to claim 1 , wherein the first planar image shows a surface of an epidermis of the skin.
8. The optical measurement method according to claim 1 , wherein the second planar image shows a plane located inside an epidermis of the skin.
9. The optical measurement method according to claim 1 , wherein the second planar image shows a plane located inside a dermis of the skin.
10. The optical measurement method according to claim 1 , wherein the second planar image shows a plane located inside a subcutaneous tissue of the skin.
11. An optical measurement apparatus comprising:
an image processing unit configured to remove, from a first planar image at a first depth in a first three-dimensional tomographic image data acquired from a skin by using optical coherence tomography, a line shown in a second planar image at a second depth deeper than the first depth; and
a measurement processing unit configured to specify a position of a pore from the first planar image from which the line has been removed.
12. A non-transitory computer readable medium storing a program for causing a computer functioning as an optical measurement apparatus to perform:
a step of removing, from a first planar image at a first depth in a first three-dimensional tomographic image data acquired from a skin by using optical coherence tomography, a line shown in a second planar image at a second depth deeper than the first depth; and
a step of specifying a position of a pore from the first planar image from which the line has been removed.