tools.psnr

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tools.psnr#

bartorch.tools.psnr()#

Peak signal-to-noise ratio of the magnitudes, in decibels, averaged over images.

Per image over (z, y, x): 20 log10 max|reference| - 10 log10 mean (|input| - |reference|)², magnitudes being the root sum of squares over the coil axis; then the mean over every other axis.

Parameters:

  • reference (torch.Tensor) – (..., coils, z, y, x), or a (y, x) image.

  • input (torch.Tensor) – (..., coils, z, y, x), or a (y, x) image.

Returns:

PSNR in decibels.

Return type:

float

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