System for analyzing eye responses to automatically track size, location, and movement of the pupil
First Claim
1. A pupil tracking system for automatically determining pupil responses, as recorded in a time-wise sequence of digital images of at least one of the subject'"'"'s eyes, comprising:
- digital image processing means for identifying a location of a pupil of at least one of said subject'"'"'s eyes in a plurality of said digital images in said sequence of digital images, comprising;
center point determining means for identifying a darkest spot in the pupil of said eye, pupil geometry determining means for ensuring said pupil satisfies a minimum shape configuration, comprising;
region-growing means for applying a region-growing procedure to said identified darkest spot of said pupil to expand the boundaries of said pupil to include regions of equivalent decreasing darkness; and
pupil size means for computing a size of said pupil in said plurality of said digital images in said sequence of digital images.
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Accused Products
Abstract
The present system for analyzing eye responses accurately and automatically tracks the size, location, and movement of a subject'"'"'s pupil(s) in response to a predetermined test protocol. These eye responses include both ocularmotor and pupillary responses to illumination and target tracking for either eye or both eyes simultaneously. The series of digital image frames of a subject'"'"'s eyes, taken during the execution of a predetermined stimulus protocol, are automatically processed to determine pupil location, size, and responsiveness to changes in illumination.
17 Citations
16 Claims
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1. A pupil tracking system for automatically determining pupil responses, as recorded in a time-wise sequence of digital images of at least one of the subject'"'"'s eyes, comprising:
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digital image processing means for identifying a location of a pupil of at least one of said subject'"'"'s eyes in a plurality of said digital images in said sequence of digital images, comprising; center point determining means for identifying a darkest spot in the pupil of said eye, pupil geometry determining means for ensuring said pupil satisfies a minimum shape configuration, comprising; region-growing means for applying a region-growing procedure to said identified darkest spot of said pupil to expand the boundaries of said pupil to include regions of equivalent decreasing darkness; and pupil size means for computing a size of said pupil in said plurality of said digital images in said sequence of digital images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for automatically determining pupil responses, as recorded in a time-wise sequence of digital images of at least one of the subject'"'"'s eyes, comprising:
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identifying a location of a pupil of at least one of said subject'"'"'s eyes in a plurality of said digital images in said sequence of digital images, comprising; identifying a darkest spot in the pupil of said eye, ensuring said pupil satisfies a minimum shape configuration, comprising; applying a region-growing procedure to said identified darkest spot of said pupil to expand the boundaries of said pupil to include regions of equivalent decreasing darkness; and computing a size of said pupil in said plurality of said digital images in said sequence of digital images. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification