tomosipo.geometry.ParallelVectorGeometry

class tomosipo.geometry.ParallelVectorGeometry(shape, ray_dir, det_pos, det_v, det_u)

Documentation for ParallelVectorGeometry

__init__(shape, ray_dir, det_pos, det_v, det_u)

Create an arbitrarily oriented parallel-beam geometry

Parameters:

• shape – The detector shape in pixels. If tuple, the order is (height, width). Else the pixel has the same number of pixels in the U and V direction.

• ray_dir – A numpy array of dimension (num_positions, 3) with the ray direction in (Z, Y, X) order.

• det_pos – A numpy array of dimension (num_positions, 3) with the detector center positions in (Z, Y, X) order.

• det_v – A numpy array of dimension (num_positions, 3) with the vector pointing from the detector (0, 0) to (1, 0) pixel (up).

• det_u – A numpy array of dimension (num_positions, 3) with the vector pointing from the detector (0, 0) to (0, 1) pixel (sideways).

Methods

__init__(shape, ray_dir, det_pos, det_v, det_u)	Create an arbitrarily oriented parallel-beam geometry
from_astra()
project_point(point)	Projects point onto detectors
rescale_det(scale)	Rescale detector pixels
reshape(new_shape)	Reshape detector pixels without changing detector size
to_astra()	Convert geometry to astra geometry
to_vec()	Return a vector geometry of the current geometry
to_vol()	Returns a volume vector geometry representing the detector

Attributes

angles	The angles from which projections are acquired.
corners	Returns a vector with the corners of each detector
det_normal	The detector normal vectors of the geometry.
det_pos	The detector positions of the geometry.
det_shape	The shape of the detector.
det_size	The size of the detector.
det_sizes	The size of each detector.
det_u	The detector u-vectors of the geometry.
det_v	The detector v-vectors of the geometry.
is_cone	Is this geometry a cone-beam geometry?
is_parallel	Is this geometry a parallel-beam geometry?
is_vec	Is this a vector geometry?
lower_left_corner	Returns a vector with the positions of the lower-left corner the detector
num_angles	The number of angles in the projection geometry
num_steps	The number of orientations in the geometry
ray_dir	The ray direction of the geometry.
src_pos	The source positions of the geometry.