I know Horn and Schunck and Lucas-Kanade (81) as optic flow methods. But Nagel is way to complex for me. Anyway I have an blackbox implementation of this method but would like to understand the improvements compared to the two basic methods for optic flow computation.
They calculate higher derivations and they seem to look at more than one frame ahead in time. But I am still not able to evaluate how the algorithm works because the paper is way to complicated for me.
Can somebody tell me what exactly the advantages and disadvantages of this method are?
Thank you in advance.