NAME

     centroid - calculates centroid coordinates of an  object  of
     interest

SYNOPSIS

      #include <math.h>
      #include "ObjectContour.h"

     int * centroid(Image * labeledImage, int r, int c)

      <labeledImage> -  pointer to a labeled image
      < r > - row coordinate of a point on the labled image
      < c > - column coordinate of a point on the labled image

PATH

     $CVIPHOME/FEATURE/binary_feature.c

DESCRIPTION

     The program  calculates  the  centroid  coordinates  of  the
     object  of  interest on the labeled image according to equa-
     tions given in chapter 2 of the soon-to-be-published book:

                Computer Vision and Image Processing:
                 A practical Approach Using CVIPtools

                   S.E.Umbaugh, Prentice Hall, 1997

TYPES AND CONSTANTS

     None

RETURN VALUES

     A pointer to int; first value is the row coordinate,  second
     is column coordinate.

HISTORY

     History information recorded: None

EXAMPLE


EXAMPLE

      #include "CVIPtoolkit.h"
      #include "CVIPobject.h"
      #include "CVIPconvert.h"
      #include "CVIPfeatures.h"

      #include <math.h>
      #include "ObjectContour.h"

      void main() {
         Image *inputImage, *labeledImage;
         IMAGE_FORMAT format;
         char *inputfile, *outputfile;
         int rows, cols, r, c;
         int *result;

         setDisplay_Image("picture", "Default");

         print_CVIP("\nEnter the Input File Name:  ");
         inputfile = (char *) getString_CVIP();
         inputImage = read_Image(inputfile, format, TRUE);
         view_Image(inputImage,inputfile);

         labeledImage = label(inputImage);

         rows = getNoOfRows_Image(labeledImage);
         cols = getNoOfCols_Image(labeledImage);

         print_CVIP("\nEnter the row coordinate of any  pixel  on
     the labled image: ");
         r = getInt_CVIP(10, 0, rows);
         print_CVIP("\nEnter the col coordinate of any  pixel  on
     the labled image: ");
         c = getInt_CVIP(10, 0, cols);

         result = centroid(labeledImage, r, c);
         print_CVIP("The centroid of the object  (r,  c)  =  (%d,
     %d)", *result, *(result+1) );
         print_CVIP("\n");

         free(inputfile);
       }

DIAGNOSTICS

     The labeled image can only of data type CVIP_INTEGER

SEE ALSO

     libfeature

AUTHOR

     Copyright (C) 1996 SIUE - by Scott E.  Umbaugh  and  Wenxing
     Li.