peak = realcons

Specifies the peak value to use for the peak signal-to-noise ratio (psnr) calculation. It is ignored for the other cases. The default is 1.

The Quality command computes the quality measure of a reconstructed image with respect to a source image.

The img_r and img_s parameters are the reconstructed and the source images, respectively. They must be grayscale images and have the same width, height, and order (C_order or Fortran_order).

$\mathrm{with}\left(\mathrm{ImageTools}\right)\:$

$\mathrm{img\_s}≔\mathrm{Create}\left(100\,200\,\left(r\,c\right)\mapsto \mathrm{evalf}\left(0.5\cdot \sin \left(\frac{r}{50}\right)+0.5\cdot \sin \left(\frac{c}{30}\right)\right)\right)\:$

$\mathrm{img\_r}≔0.99\mathrm{img\_s}+0.01\:$

$\mathrm{Quality}\left(\mathrm{img\_r}\,\mathrm{img\_s}\,\mathrm{psnr}\right)$

$42.61176831$

$\mathrm{Quality}\left(\mathrm{img\_r}\,\mathrm{img\_s}\,\mathrm{snr}\right)$

$36.96510324$

$\mathrm{Quality}\left(\mathrm{img\_r}\,\mathrm{img\_s}\,\mathrm{rmse}\right)$

$0.007403065375$

$\mathrm{Quality}\left(\mathrm{img\_r}\,\mathrm{img\_s}\,\mathrm{mse}\right)$

$0.0000548053769518647838$