bartorch.ssim

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bartorch.ssim#

bartorch.ssim(reference, input)#

Mean structural similarity of the magnitudes (--ssim).

Magnitudes are the root sum of squares over the coil axis, and each image is divided by the maximum magnitude of its reference. SSIM with k1 = 0.01, k2 = 0.03, dynamic range one and population statistics over a uniform 7x7 window in (y, x), at every position the window fits whole (no padding), averaged over those positions, over z and over every other axis (networks/losses.c:304-327, nn/losses.c:151-285).

Parameters:

  • reference (torch.Tensor) – C order (..., coils, z, y, x); a plain (y, x) image serves. y and x are at least seven.

  • input (torch.Tensor) – C order (..., coils, z, y, x); a plain (y, x) image serves. y and x are at least seven.

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