公开(公告)号：US20250131576A1

公开(公告)日：2025-04-24

申请号：US18923351

申请日：2024-10-22

Applicant: AMO Development, LLC

Inventor： Chaohong Wu

IPC: G06T7/13 ,  A61F9/008 ,  G06T5/30

Abstract: Two pupil detection methods implemented in an ophthalmic laser surgery system for detecting the pupil of the patient's eye both before and after the eye is applanated by a patient interface device. In the first method, an infrared image is captured before the eye is coupled to the patient interface. After excluding certain image artifacts, the pixel intensity is clustered into four clusters, and pixels belonging to the cluster with the lowest intensity are deemed pupil pixels, and pupil boundary and pupil center are determined accordingly. In the second method, a color image is captured after the eye is coupled to the patient interface. The color image is converted to the HSV color space, and only the hue channel is used for pupil detection. The hue channel image is filtered by median filtering and edge-preserving filtering (e.g. guided image filtering), then binarized, before pupil detection is performed.