The background is estimated by computing the median over an int-type image. In some cases the number of elements is even which results in a float (.5) result for the background. For the cov-estimation the background value is first subtracted, which can lead to the data-points being float instead of int type.
The background is estimated by computing the median over an int-type image. In some cases the number of elements is even which results in a float (.5) result for the background. For the cov-estimation the background value is first subtracted, which can lead to the data-points being float instead of int type.