Introduction - If you have any usage issues, please Google them yourself
Pattern Recognition and Image Procesing Group.
The size of the accumulator is varied as hierarchical voting is performed. This
has two advantages.
[a] While the radius is only a poor approximation, it is easier to find the maximum
in a small accumulator and because by means of the downsampling
implicit smoothing is done to the accumulator.
[b] At the same time processing time for the search is reduced.