Function computePsnr

computePsnr(image, otherImage): number
Compute the Peak signal-to-noise ratio (PSNR) between two images. The larger the PSNR, the more similar the images.
Parameters
- image: Image
  First image.
- otherImage: Image
  Second image.
Returns number
PSNR of the two images in decibels.

See
https://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio
- Defined in compare/computePsnr.ts:13