Thread: Peak signal to noise ratio code ...how to take input and get the out morever my code is not running plzz help

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import java.io.*;

public class Psnr {

public static double log10(double x) {
return Math.log(x)/Math.log(10);
}

public static void main (String[] args) {
int nrows, ncols;
int img1[][], img2[][];
double peak, signal, noise, mse;

if (args.length != 4) {
System.out.println("Usage: Psnr <nrows> <ncols> <img1> <img2>");
return;
}
nrows = Integer.parseInt(args[0]);
ncols = Integer.parseInt(args[1]);
img1 = new int[nrows][ncols];
img2 = new int[nrows][ncols];
ArrayIO.readByteArray(args[2], img1, nrows, ncols);
ArrayIO.readByteArray(args[3], img2, nrows, ncols);

signal = noise = peak = 0;
for (int i=0; i<nrows; i++) {
for (int j=0; j<ncols; j++) {
signal += img1[i][j] * img1[i][j];
noise += (img1[i][j] - img2[i][j]) * (img1[i][j] - img2[i][j]);
if (peak < img1[i][j])
peak = img1[i][j];
}
}

mse = noise/(nrows*ncols); // Mean square error
System.out.println("MSE: " + mse);
System.out.println("SNR: " + 10*log10(signal/noise));
System.out.println("PSNR(max=255): " + (10*log10(255*255/mse)));
System.out.println("PSNR(max=" + peak + "): " + 10*log10((peak*peak)/mse));
}
}

What is your question?
is there any errors in your code? if so, please paste it here.

ArrayIO.readByteArray(args[2], img1, nrows, ncols);
ArrayIO.readByteArray(args[3], img2, nrows, ncols);
errors r cuming in these two lines
when i compile the above program it compile but does not run

--- Update ---

do i need to import files for
ArrayIO.readByteArray(args[2], img1, nrows, ncols);
ArrayIO.readByteArray(args[3], img2, nrows, ncols);
please help

--- Update ---

I need PSNR code to run smoothly

what does it says when you run it? can you create a print right after the main method and then compile and run again?

Psnr and ArrayIO were written by Yuan-Liang Tang. Use of code without the author's permission and attribution is plagiarism. Please post here evidence from the author that you are free to use them.