edu.stanford.rsl.tutorial.atract

Class Kollimator

java.lang.Object

edu.stanford.rsl.tutorial.atract.Kollimator

public class Kollimator
extends java.lang.Object

Class to simulate a collimation on existing projection images.

Author:

Marco Boegel (Reco Project 2012 - Individual Project)

Constructor Summary

Constructors

Constructor and Description
Kollimator()
Kollimator(int maxThetaIndex, int maxSIndex) This constructor is only necessary for 2-D Kollimation.

Method Summary

Methods

Modifier and Type	Method and Description
void	applyToGrid(Grid2D input, int width) This function collimates an existing projection image stack.
void	applyToGrid(Grid3D input, int width, int height) This function kollimates an existing projection image stack.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Kollimator

public Kollimator(int maxThetaIndex,
          int maxSIndex)

This constructor is only necessary for 2-D Kollimation. The 3-D Collimation reads the necessary values directly from the Configuration file.

Parameters:

maxThetaIndex - Number of projections

maxSIndex - Detector size in pixels

Kollimator

public Kollimator()

Method Detail

applyToGrid

public void applyToGrid(Grid2D input,
               int width)

This function collimates an existing projection image stack. Pixels outside the kollimator are set to zero. The collimator is centered by default. Width is the still visible part of the projection provided by user input.

Parameters:

input - The 2-D sinogram

width - Kollimator width

applyToGrid

public void applyToGrid(Grid3D input,
               int width,
               int height)

This function kollimates an existing projection image stack. Pixels outside the kollimator are set to zero. The kollimator is centered by default. Width and height define the still visible field of view and are provided by user input.

Parameters:

input - The projection images in a 3-D Grid

width - Kollimator width

height - Kollimator height