private int[,] GetIntegralMask(Mat mask)
{
var integral = new int[mask.Rows, mask.Cols];
var mat3 = new MatOfByte(mask);
var indexer = mat3.GetGenericIndexer <int>();
for (var i = 0; i < mask.Rows; i++)
{
for (var j = 0; j < mask.Cols; j++)
{
var sum = 0;
var substr = false;
if (i != 0)
{
if (j != 0)
{
substr = true;
}
sum += integral[i - 1, j];
}
if (j != 0)
{
sum += integral[i, j - 1];
}
if (substr)
{
sum -= integral[i - 1, j - 1];
}
sum += indexer[i, j] > 0 ? 1 : 0;
integral[i, j] = sum;
}
}
return(integral);
}
