package edu.stanford.rsl.tutorial.phantoms;
/**
* Simple class to show the Grid2D functionality. We use a Grid2D to create a uniform circle.
* We use this as a first phantom to investigate parallel beam projection and back-projection.
*
* @author Recopra Summer Semester 2012
*
*/
public class TestObject2 extends Phantom {
/**
* The constructor takes two arguments to initialize the grid. The circle will be in the center and have a radius of 45% of the x-dimension.
* Thus we recommend a grid size that is uniform in both directions.
* @param x
* @param y
*/
public TestObject2 (int x, int y){
super(x,y,"TestObject2");
// Create circle in the grid.
double radius = 0.2*x;
int xcenter = 1*x/4;
int ycenter = 3*x/4;
float val = 1.f;
for(int i = 0; i<x; i++) {
for(int j = 0; j<y; j++) {
if( Math.pow(i - xcenter, 2) + Math.pow(j - ycenter, 2) <= (radius*radius) ) {
super.setAtIndex(i, j, val);
}
}
}
}
}
/*
* Copyright (C) 2010-2014 Andreas Maier
* CONRAD is developed as an Open Source project under the GNU General Public License (GPL).
*/