backward_sd_cassi

colibri.optics.functional.backward_sd_cassi(y, ca)[source]

Backward operator of single disperser coded aperture snapshot spectral imager (SD-CASSI)

For more information refer to: Compressive Coded Aperture Spectral Imaging: An Introduction: https://doi.org/10.1109/MSP.2013.2278763

Parameters:

y (torch.Tensor) – Measurement with shape (B, 1, M, N + L - 1)
ca (torch.Tensor) – Coded aperture with shape (1, 1, M, N)

Returns:

Spectral image with shape (B, L, M, N)

Return type:

torch.Tensor