1. A method comprising: partitioning a region of interest into a plurality of soft bin regions that span the region of interest; estimating an integral over each soft bin region of a function defined over the region of interest; and outputting a value equal to or derived from the sum of the estimated integrals over the soft bin regions spanning the region of interest.
1. A method comprising: partitioning a region of interest into a plurality of soft bin regions that span the region of interest; estimating an integral over each soft bin region of a function defined over the region of interest; and outputting a value equal to or derived from the sum of the estimated integrals over the soft bin regions spanning the region of interest. 2. The method as set forth in claim 1 , further comprising: after the estimating, iteratively adjusting the partitioning to increase the number of soft bin regions and repeating the estimating over the increased number of soft bins until a stopping criterion is met.