Patent ID: 8885901

Claim:
A computing system for enhancing a retinal image, the computing system comprising: one or more hardware computer processors; and one or more storage devices configured to store software instructions configured for execution by the one or more hardware computer processors in order to cause the computing system to: access a medical retinal image for enhancement, the medical retinal image related to a subject; compute a median filtered image I Back,S with a median computed over a geometric shape, at single or multiple scales; determine whether intensity at a first pixel location in the medical retinal image I(x,y) is lower than intensity at a same position in the median filtered image I Back,S (x,y) for generating an enhanced image; if the intensity at the first pixel location is lower, then set a value at the first pixel location in the enhanced image to a value around a middle of a minimum and a maximum intensity value for the medical retinal image C mid scaled by a ratio of intensity at medical retinal image to intensity in the median filtered image as expressed by C mid · I ⁡ ( x , y ) I Back , S ⁡ ( x , y ) ; and if the intensity at the first pixel location is not lower, then set a value at the first pixel location in the enhanced image to a sum of around the middle of the minimum and the maximum intensity value for the medical retinal image, C mid , and (C mid −1) scaled by a ratio of a difference of intensity of the median filtered image from intensity of the medical retinal original image to a difference of intensity of the median filtered image from a maximum possible intensity value C max , expressed as C mid + ( ( C mid - 1 ) · I ⁢ ( x , y ) - I Back , S ⁡ ( x , y ) C max - I Back , S ⁡ ( x , y ) ) ; wherein the enhanced image is used to infer or further analyze, a medical condition of the subject.