Title:
光コヒーレンストモグラフィにおける虹彩縁検出
Document Type and Number:
Japanese Patent JP7208992
Kind Code:
B2
Abstract:
A-lines are obtained from an OCT scan of the eye, some of which pass through the iris and the lens and some of which pass through the lens but not the iris. An interface is detected from the A-lines; at least some of this interface is assumed to correspond to either the anterior or posterior of the iris. For each A-line, a first metric is derived from pixels near the detected first interface, such that the first metric reflects an OCT signal intensity associated with the interface, and a second metric is derived from pixels further from the interface, such that the second metric reflects OCT signal attenuation below the detected interface. An attenuation parameter is calculated for each A-line, based on the first and second metrics, and the iris's edge is detected by determining whether each A-line passes through the iris, based on the attenuation parameter.
Inventors:
Fukan Ren
Muhammad Al-Qaesi
Muhammad Al-Qaesi
Application Number:
JP2020528946A
Publication Date:
January 19, 2023
Filing Date:
November 28, 2018
Export Citation:
Assignee:
Archon Incorporated
International Classes:
A61B3/10
Domestic Patent References:
| JP2014147780A |
Foreign References:
| US5644642 | ||||
| US20140128731 |
Attorney, Agent or Firm:
Aoki Atsushi
Shinji Mihashi
Koichi Ito
Kentaro Ito
Shinji Mihashi
Koichi Ito
Kentaro Ito
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