System and Method for Eye Tracking During Retinal Imaging
AssigneeCanon Kabushiki Kaisha
InventorKoji NOZATO
Life of this patent
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Abstract
A method, a, controller, a non-transitory computer readable storage medium encoded with instructions; each of which control an apparatus to produce multiple images of an area of an eye in parallel. Selecting one of the images for estimating a change in position of the area to be used for tracking the area of the eye being imaged.
Claims19
A method of controlling an ophthalmic apparatus to produce images of an area of an eye, wherein the apparatus scans light on the area, divides return light from the area into a first portion of light and a second portion of light, generates a first image based on the first portion of the return light, and generates a second image based on the second portion of return light, the method comprising:
- receiving the first image and the second image;
- comparing the first image and the second image;
- selecting the first image or the second image based on a result of the comparing step as a position detection image;
- and
- estimating a change in position of the area based on the position detection image.
A controller that is configured to control an ophthalmic apparatus to produce images of an area of an eye, wherein the apparatus scans light on the area, divides return light from the area into a first portion of light and a second portion of light, generates a first image based on the first portion of the return light, and generates a second image based on the second portion of the return light, the controller comprising:
- a processor;
- and
- a memory;
- wherein the processor receives the first image and the second image;
- wherein the processor compares the first image and the second image;
- wherein the processor selects the first image or the second image based on the comparing result as a position detection image;
- and
- wherein the processor estimates a change in position of the area based on the position detection image.
A non-transitory computer readable storage medium encoded with instructions for performing a method of controlling an ophthalmic apparatus to produce images of an area of an eye, wherein the apparatus scans light on the area, divides return light from the area into a first portion of light and a second portion of light, generates a first image based on the first portion of the return light, and generates a second image based on the second portion of the return light, the instructions may comprise:
- instructions for receiving the first image and the second image;
- instructions for comparing the first image and the second image;
- instructions for selecting the first image or the second image based on the compared result as a position detection image;
- and
- instructions for estimating a change in position of the area based on the position detection image.
Dependencies are inferred from the claim text.