1. A method of measuring glomeruli in a kidney, the method comprising: obtaining a 3 dimensional image of a kidney; smoothing the image via a Difference of Gaussians filter; conducting a Hessian analysis on the smoothed image to mark glomeruli candidates; identifying, for each glomeruli candidate, average intensity A T , likelihood of blobness R T , and flatness S T ; and executing a clustering algorithm to post prune the glomeruli candidates.