Digital stereo image analyzer for automated analyses of human retinopathy
OwnerPeter Soliz, Sunanda Mitra +2inventors
InventorsPeter Soliz, Sunanda Mitra, Mark Wilson, Enrique Corona
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Abstract
A system and method of automated analysis of human retinopathy. Stereo images of a retina are obtained at different times. Topography of the retina is obtained from analysis of the stereo image pair. Cupping of the retina is then ascertained and is indicative of the progression and severity of various retinopathies. Disparity mapping of the retina from the various images are also obtained from the images and compared at different times to assess how retinal disparities are changing as yet another indicator of the progression of retinopathies.
Claims10
A process for detecting optic disc deformation comprising:
- obtaining a stereo image pair of an optic disc;
- preprocessing the stereo image pair;
- registering the stereo image pair;
- extracting features from the stereo image pair;
- finding course to fine disparities within the stereo image pair;
- and
- obtaining a three dimensional representation of the optic disc.
A process for generating a three dimensional measure of optic disc deformation comprising:
- obtaining a stereo image pair of an Optic Nerve Head (ONH);
- identifying landmarks in each image of the stereo image pair;
- identifying the disparity associated with depth of the stereo image;
- aligning the images;
- extracting binary features from the stereo images;
- registering the stereo images in the vertical axis;
- finding coarse to fine disparities of selected regions;
- identifying the disparity for the finest ( highest resolution) window resulting in thereby creating a sparse disparity matrix;
- smoothing the sparse disparity matrix using a cubic B-spline interpolation;
- and
- superimposing the landmarks in the original stereo image pair image in the a 3-D representation of the Optical Nerve Head.
Dependencies are inferred from the claim text.