vamtoolbox.projector.gauss2D

Module Contents

Classes

gauss2D

Attributes

font

class vamtoolbox.projector.gauss2D.gauss2D(target, proj_params, optical_params)

createGaussKernel()

Builds Gaussian kernel and Fourier-transformed kernel according to the optical parameters specified in optical_params

Returns:

• kernel (ndarray) – single pixel Gaussian beam approximation with same size as target

• FFT_kernel (ndarray) – kernel Fourier-transformed along dimensions orthogonal to propagation

setupInterpCoords(dimension, angle=None)

convolveWithGaussKernelFP(target)

convolveWithGaussKernelBP(projection)

Convolves a 1D or 2D projection with a 1D or 2D Gauss kernel defined at each propagation distance to generate the backprojection for the angle of the projection.

1D f*_theta(x,y) = fft(P_theta(t)) * fft(G(t,prop))

2D f*_theta(x,y,z) = fft(P_theta(t,z)) * fft(G(t,prop,z))

Parameters:

projection (ndarray) – 1D projection in t (lateral) or 2D projection in t (lateral) and z (height) axes at a single projection angle

Returns:

convolved_backproj – convolved backprojection in spatial domain for the same angle of the input projection

Return type:

ndarray

gaussFP(target)

gaussBP(projections)

forwardProject(target)

backProject(projections)

vamtoolbox.projector.gauss2D.font