plineardilation

Performs linear dilation.

Synopsis

plineardilation orientation1 orientation2 halfsize [im_in|-] [im_out|-]

Description

plineardilation dilates the points of stronger contrast with a linear element structuring of direction orientation1 plus orientation2 for 3D images. The size of the structuring element is of halfsize pixels on both sides of the central pixel.

Dilation of point p corresponds to the operation: replace the central pixel by the maximum value of its neighbors:

   dilation(p) = MAX(neighbors specified by the structuring element).

For a binary image, dilation dilates white areas.

For the region maps, dilation dilates only regions that touch the background and region with the higher label are privileged.

For the color images, the lexicographic order is used: initially by using band X, in the event of equality by using the band Y then band Z.

Parameters

orientation1 corresponds to the orientation in degrees between in the x and y plane.
orientation2 corresponds to the orientation in degrees between the z and x,y coordinates.
halfsize is the half-size of the element structuring in a number of pixels. The line has a size of 2*halfsize+1.

Inputs

im_in: an image or a region map.

Outputs

im_out: an image (or a region map) of the same type as im_in.

Result

Returns SUCCESS or FAILURE.

Examples

Gets the tangram pieces boundaries that have at least 5 vertical pixels:

 
   pgradient 1 tangram.pan i1.pan i2.pan
   pbinarization 20 1e30 i1.pan i3.pan 
   plinearerosion 90 0 5 i3.pan i4.pan
   plineardilation 90 0 5 i4.pan out.pan

C++ prototype

Errc PLinearDilation( const Img2duc &im_in, Img2duc &im_out, int orientation1, int orientation2, int halsize );

Version française

Dilatation morphologique des points de plus fort contraste d'une image par une ligne.

Author: Régis Clouard