Systems and methods for balancing infrared illumination in eye imaging
AssigneeAMO Development, LLC
InventorLi Chen
Life of this patent
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Abstract
The field of the invention relates to systems and methods for eye imaging and, more particularly, for balancing illuminations in eye imaging. An asymmetric illumination method to compensate for the imbalance illumination caused by nose reflection is described. In one embodiment, a method for balancing illuminations in eye imaging comprises generating one or more eye images, using the images to detect the imbalance illuminations from the nasal sclera and temporal sclera with the selected region of interest. In another embodiment, a system for balancing illuminations in eye imaging uses the detected imbalance illumination ratio of nasal/temporal sclera as the signal for adjusting the brightness of the infrared LEDs for asymmetric illumination.
Claims5
An eye imaging assembly comprising:
- an imaging device positioned to capture an image of a patient's eye;
- an illumination device positioned to illuminate the patient's eye;
- a processor operatively coupled to the imaging device;
- and a computer readable medium that stores a computer program that, when executed, causes the processor to perform or enable the following steps:
- generate one or more eye images with the imaging device;
- detect one or more outer iris boundaries within the one or more captured eye images;
- select at least one region of interest from nasal sclera and temporal sclera within the one or more captured eye images;
- calculate a ratio of illumination imbalance;
- and
- adjust the illumination device until the ratio of illumination imbalance reaches a predetermined tolerance level.
Dependencies are inferred from the claim text.