+++ /dev/null
-/*****************************************************************************
-** FILE IDENTIFICATION
-**
-** Name: phm2image.cpp
-** Purpose: Convert phantom objects to rasterized images
-** Programmer: Kevin Rosenberg
-** Date Started: 1984
-**
-** This part of the CTSim program
-** Copyright (C) 1983-2000 Kevin Rosenberg
-**
-** $Id: phm2image.cpp,v 1.1 2000/06/19 02:59:34 kevin Exp $
-**
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU General Public License (version 2) as
-** published by the Free Software Foundation.
-**
-** This program is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-** GNU General Public License for more details.
-**
-** You should have received a copy of the GNU General Public License
-** along with this program; if not, write to the Free Software
-** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-******************************************************************************/
-
-#include "ct.h"
-
-
-/* NAME
- * pic_to_imagefile Make image array from Phantom
- *
- * SYNOPSIS
- * pic_to_imagefile (pic, im, nsample)
- * Phantom& pic Phantom definitions
- * ImageFile *im Computed pixel array
- * int nsample Number of samples along each axis for each pixel
- * (total samples per pixel = nsample * nsample)
- */
-
-void
-phm_to_imagefile (const Phantom& phm, ImageFile& im, const int col_start, const int col_count, const int in_nsample, const int trace)
-{
- int nsample = in_nsample;
- double dx = phm.xmax() - phm.xmin();
- double dy = phm.ymax() - phm.ymin();
- double xcent = phm.xmin() + dx / 2;
- double ycent = phm.ymin() + dy / 2;
- double phmlen = (dx > dy ? dx : dy);
-
- double phmradius = phmlen / 2;
-
- double xmin = xcent - phmradius;
- double xmax = xcent + phmradius;
- double ymin = ycent - phmradius;
- double ymax = ycent + phmradius;
-
- im.setAxisExtent (xmin, xmax, ymin, ymax);
- int nx = im.nx();
- int ny = im.ny();
-
-/* Each pixel holds the average of the intensity of the cell with (ix,iy)
- * at the center of the pixel
- *
- * Set major increments so that the last cell v[nx-1][ny-1] will start at
- * (xmax - xinc, ymax - yinc).
- *
- * Set minor increments so that sample points are centered in cell
- */
-
- if (nx < 2 || ny < 2)
- return;
-
- double xinc = (xmax - xmin) / nx;
- double yinc = (ymax - ymin) / ny;
- im.setAxisIncrement (xinc, yinc);
-
- if (nsample < 1)
- nsample = 1;
-
- double kxinc = xinc / nsample; /* interval between samples */
- double kyinc = yinc / nsample;
- double kxofs = kxinc / 2; /* offset of 1st point */
- double kyofs = kyinc / 2;
-
-#ifdef HAVE_SGP
- SGP_ID gid = NULL;
- if (trace > TRACE_TEXT) {
- gid = sgp2_init (0, 0, "Phantom to Image");
- sgp2_window (xmin, ymin, xmax, ymax);
- sgp2_frame_vpt();
- }
-#endif
-
- ImageFileArray v = im.getArray();
-
- double x_start = xmin + (col_start * xinc);
- for (PElemConstIterator i = phm.listPElem().begin(); i != phm.listPElem().end(); i++) {
-#ifdef HAVE_SGP
- if (trace > TRACE_TEXT)
- sgp2_polyline_abs ((*i)->xOutline(), (*i)->yOutline(), (*i)->nOutlinePoints());
-#endif
- double x, y, xi, yi;
- int ix, iy, kx, ky;
- for (ix = 0, x = x_start; ix < col_count; ix++, x += xinc) {
- for (iy = 0, y = ymin; iy < ny; iy++, y += yinc) {
- for (kx = 0, xi = x + kxofs; kx < nsample; kx++, xi += kxinc) {
- for (ky = 0, yi = y + kyofs; ky < nsample; ky++, yi += kyinc)
- if ((*i)->isPointInside (xi, yi, PHM_COORD) == TRUE)
- v[ix][iy] += (*i)->atten();
- } // for kx
- } /* for iy */
- } /* for ix */
- } /* for pelem */
-
-
- if (nsample > 0) {
- double factor = 1.0 / (nsample * nsample);
-
- for (int ix = 0; ix < col_count; ix++)
- for (int iy = 0; iy < ny; iy++)
- v[ix][iy] *= factor;
- }
-
-#if HAVE_SGP
- if (trace > TRACE_TEXT)
- sgp2_close(gid);
-#endif
-
-}
-
projects / ctsim.git / blobdiff