Skip to content
This repository was archived by the owner on Apr 15, 2024. It is now read-only.
This repository was archived by the owner on Apr 15, 2024. It is now read-only.

add torsion algorithm #18

Open
Open
@simonarvin

Description

@simonarvin

Torsional vector algorithm

-1Asset 25-8
Fig

Several neuro-ocular pathologies produce torsional eye movement patterns, such as torsional nystagmus and midbrain lesions. Here's a suggestion to compute the torsional vector of the eye (see Fig):

A - B: detect pupil.
C: Expand pupil fit model (via scalar x radii).
D: Extract iris nuances using regular pupil model (B) subtracted from the expanded model (C).

One way to calculate the torsional vector using the iridal nuances is to extract the mean brightness of iridal subsegments segmented radially by increments of x degrees, where x is the size of each segment. The pattern of brightness across subsegments reveals phase shifting of the 'wavy' appearance of the iris, ie torsion is quantised.

Best,
Simon

Metadata

Metadata

Assignees

No one assigned

    Labels

    enhancementNew feature or request

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions