Specifications

ImageFiltering
6-18
6
MaxFilter
Applyamaxfiltertothe
image.
voidiplMaxFilter(IplImage* srcImage , IplImage* dstImage ,
int
nCols , int nRows , int anchorX , int anchorY );
srcImage Thesourceimage.
dstImage Theresultantimage.
nCols Numberofcolumnsintheneighborhoodtouse.
nRows Numberofrowsintheneighborhoodtouse.
anchorX, anchorY The [x, y] coordinates of the anchor cell in the
neighborhood.Inthiscoordinatesystem,thetop
leftcornerwouldbe[0,0]andthebottomright
cornerwouldbe[
nCols -1, nRows -1]. For a 3 by
3neighborhood,thecoordinatesofthegeometric
centerwouldbe[1,1].Thisspecificationallows
theneighborhoodtobeskewedwithrespecttoits
geometriccenter.
Discussion
ThefunctioniplMaxFilter()setseachpixelintheoutputimageasthe
maximumvalueofalltheinputimagepixelvaluesintheneighborhoodof
size
nRows by nCols with the anchor cell at that pixel. This has the effect
ofincreasingthecontrastintheimage.