ComposedPhysics

class deepinv.physics.ComposedPhysics(*physics, device='cpu', **kwargs)

Bases: Physics

Composes multiple physics operators into a single operator.

The measurements produced by the resulting model are defined as

\[\noise{\forw{x}} = N_k(A_k(\dots A_2(A_1(x))))\]

where \(A_i(\cdot)\) is the ith physics operator and \(N_k(\cdot)\) is the noise of the last operator.

Parameters:

physics (Iterable[deepinv.physics.Physics]) – variable number of physics to compose.

A(x, **kwargs)

Computes forward of composed operator

\[y = A_k(\dots(A_1(x)))\]

Parameters:

x (torch.Tensor) – signal/image

Returns:

measurements

Return type:

Tensor

update_parameters(**kwargs)

Updates the parameters of each operator in the composed operator.

Parameters:

kwargs (dict) – dictionary of parameters to update.