#include <cv.h>
#include <highgui.h>

main(int argc, char *argv[])
{
    CvScalar mean, std_dev;
    int height = 0, width = 0, step = 0, nChannels = 0, werte = 0, i = 0, j = 0, k = 0;
    uchar *data;

    IplImage* img = 0;                                                                                                  //#1
    img = cvLoadImage("hundertwasser.bmp", 3);

        height    = img->height;
        width     = img->width;
        step      = img->widthStep;
        nChannels = img->nChannels;
        data      = (uchar *)img->imageData;

    cvShowImage("Hundertwasser",img);                                                                                   //#2

    printf("Bildgroesse \t %dx%d \t mit \t %d \t Kanal/Kanaelen\n",height,width,nChannels);                                         //#3

    cvAvgSdv( img, &mean, &std_dev, 0 );
    printf("mittlerer Grauwert: \t\t %10.3f\n",mean.val[0]);
    printf("Standardabweichung: \t\t %10.3f\n",std_dev.val[0]);                                                             //#4

      for(i; i < height; i++)
          for(j; j < width; j++)
                  for(k; k < nChannels; k++)
                  {
                          if(data[i*step + j*nChannels + k] == 120)
                          {
                                werte++;
                                data[i*step + j*nChannels + k] = 255;                                                       //#5
                          }

                  }
                          printf("Anzahl der Pixel mit Grauwert 120:\t%d\n",  werte);

    cvWaitKey(0);
    cvReleaseImage(&img);
    return 0;
}