Retrieve map of internal threshold levels from OpenCV's Adaptive Threshold function

I have used adaptive thresholding in the past with fairly good results. But there are always areas of pixels that sneak past the threshold function. It would lend some insight if I could view the ‘map of threshold levels’ that the OpenCV function comes up with. Is there any easy way to retrieve the internal threshold levels directly, or will I inevitably end up digging through C++ source?