DeleteSmallComponents[image] replaces small connected components in a binary image image with background pixels.DeleteSmallComponents[m] replaces positive integers in a label ...

DirectedGraphQ[g] yields True if the graph g is a directed graph and False otherwise.

DirichletConvolve[f, g, n, m] gives the Dirichlet convolution of the expressions f and g.

DirichletTransform[expr, n, s] gives the Dirichlet transform of expr with respect to n.

DiscreteIndicator[x, x_1, {u_1, u_2, ...}] yields the discrete indicator function, equal to 1 if x = x_1 and 0 if x = u_i for any i.

DistributedContexts is an option for various parallel computing functions that specifies which definitions for symbols appearing in an expression should be distributed to all ...

DynamicWrapper[e, expr] represents an object that displays as e, but dynamically updates the expression expr whenever that object is visible on screen.

EdgeDetect[image] finds edges in image and returns the result as a binary image.EdgeDetect[image, r] finds edges at the scale of the specified pixel range r.EdgeDetect[image, ...

EmptyGraphQ[g] yields True if g is an empty graph and False otherwise.

Erosion[image, ker] gives the morphological erosion of image with respect to the structuring element ker.Erosion[image, r] gives the erosion with respect to a range-r square.