/* ------------------------------------------------------------ */
float32 psnr(uint8 **X, int i0, int i1, int j0, int j1, uint8 **Y)
/* ------------------------------------------------------------ */
{
float32 mse;
float32 psnr;
mse = mean_square_error(X, i0, i1, j0, j1, Y);
if(mse != 0.0f) {
psnr = 10 * (log10(255*255) / log10(mse));
} else {
psnr = 0.0;
}
return psnr;
}
static double imgerr(char *m, float *x, float *y, int n)
{
double r;
if (false);
else if (0 == strcmp(m, "MSE")) r = mean_square_error(x, y, n);
else if (0 == strcmp(m, "RMSE")) r = root_mean_square_error(x, y, n);
else if (0 == strcmp(m, "MAE")) r = mean_absolute_error(x, y, n);
else if (0 == strcmp(m, "UIQI")) r = uiqi(x, y, n);
else if (0 == strcmp(m, "SSIM")) r = ssim(x, y, n);
else if (0 == strcmp(m, "PSNR")) r = psnr(x, y, n);
else if (0 == strcmp(m, "NCC")) r = ncc(x, y, n);
else if (string_is_lp(m, &r)) r = ell_pee_distance(x, y, n, r);
else fail("unrecognized metric \"%s\"", m);
return r;
}
