cp_errdiff.c
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			#include<stdio.h>

			/* function compute norme of (test image-image) ----------- */

			double cp_errdiff(double im1, double im2, int ni, int nj, double sigim)
			{
			register int i, j;
			double ndiff = 0;

			for (i = 0; i < ni; i++)
			for (j = 0; j < nj; j++)
			ndiff += (im1[i][j] - im2[i][j]) * (im1[i][j] - im2[i][j]);

			ndiff /= ni * nj;
			ndiff /= sigim * sigim;

			return(ndiff);
			}

R1448/ChiBenchmark/lenstoolchi/src/cp_errdiff.cc99f2e455a51develop_chris