The bifurcation structure is composed of a master bifurcation point and its three connected neighbors. The characteristic vector of each bifurcation structure consists of the normalized branching angle and length, which is invariant against translation, rotation, scaling, and even modest distortion. This can greatly reduce the ill-posed nature of the matching process as long as the vasculature pattern can be segmented.
Li CHEN (2022). feature-based retinal image registration (https://www.mathworks.com/matlabcentral/fileexchange/23015-feature-based-retinal-image-registration), MATLAB Central File Exchange. Retrieved .
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