** This is part of the CTSim program
** Copyright (C) 1983-2000 Kevin Rosenberg
**
-** $Id: imagefile.cpp,v 1.6 2000/06/28 15:25:34 kevin Exp $
+** $Id: imagefile.cpp,v 1.10 2000/08/22 16:49:56 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
}
int
-ImageFile::display (void)
+ImageFile::display (void) const
{
double pmin, pmax;
- // getPixelValueRange (pmin, pmax);
+ getMinMax (pmin, pmax);
return (displayScaling (1, pmin, pmax));
}
int
-ImageFile::displayScaling (const int scale, const ImageFileValue pmin, const ImageFileValue pmax)
+ImageFile::displayScaling (const int scale, const ImageFileValue pmin, const ImageFileValue pmax) const
{
- int grayscale[256];
int nx = m_nx;
int ny = m_ny;
- ImageFileArray v = getArray();
+ ImageFileArrayConst v = getArray();
+ if (v == NULL || nx == 0 || ny == 0)
+ return 0;
#if HAVE_G2_H
int pens [nx * ny * scale * scale ];
double view_scale = 255 / (pmax - pmin);
int id_X11 = g2_open_X11 (nx * scale, ny * scale);
-
+ int grayscale[256];
for (int i = 0; i < 256; i++) {
double cval = i / 255.;
grayscale[i] = g2_ink (id_X11, cval, cval, cval);
return false;
}
ImageFileArrayConst v = getArray();
+ if (v == NULL || m_nx == 0 || m_ny == 0)
+ return false;
+
ImageFileArrayConst vComp = imComp.getArray();
double myMean = 0.;
- for (int ix = 0; ix < m_nx; ix++) {
- for (int iy = 0; iy < m_ny; iy++) {
+ for (unsigned int ix = 0; ix < m_nx; ix++) {
+ for (unsigned int iy = 0; iy < m_ny; iy++) {
myMean += v[ix][iy];
}
}
double absErrorSum = 0.;
double sqDiffFromMeanSum = 0.;
double absValueSum = 0.;
- for (int ix = 0; ix < m_nx; ix++) {
- for (int iy = 0; iy < m_ny; iy++) {
+ for (unsigned int ix = 0; ix < m_nx; ix++) {
+ for (unsigned int iy = 0; iy < m_ny; iy++) {
double diff = v[ix][iy] - vComp[ix][iy];
sqErrorSum += diff * diff;
absErrorSum += fabs(diff);
os << " Normalized root mean squared distance (d): " << d << endl;
os << " Normalized mean absolute distance (r): " << r << endl;
os << "Worst case distance (2x2 pixel average) (e): " << e << endl;
+ return true;
}
+ return false;
}
int ny = m_ny;
ImageFileArrayConst v = getArray();
+ if (v == NULL || nx == 0 || ny == 0)
+ return;
+
mean = 0;
min = v[0][0];
max = v[0][0];
}
mean /= (nx * ny);
- static const int nbin = 256;
+ static const int nbin = 1024;
int hist[ nbin ] = {0};
double spread = max - min;
mode = 0;
}
mode = (max_binindex * spread / (nbin - 1)) + min;
-
- median = 0.;
+
+ int nPixels = nx * ny;
+ slist<double> vecImage;
+ for (int ix = 0; ix < nx; ix++)
+ for (int iy = 0; iy < ny; iy++)
+ vecImage.push_front (v[ix][iy]);
+ vecImage.sort();
+ slist<double>::const_iterator iter = vecImage.begin();
+ for (int i = 0; i < (nPixels / 2) - 1; i++)
+ iter++; // Advance iterator to (nPixels / 2) - 1;
+
+ if (nPixels % 2) { // Odd
+ iter++;
+ median = *iter;
+ } else // Even
+ median = (*iter++ + *iter) / 2;
+}
+
+
+void
+ImageFile::getMinMax (double& min, double& max) const
+{
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArrayConst v = getArray();
+
+ if (v == NULL || nx == 0 || ny == 0)
+ return;
+
+ min = v[0][0];
+ max = v[0][0];
+ for (int ix = 0; ix < nx; ix++) {
+ for (int iy = 0; iy < ny; iy++) {
+ if (v[ix][iy] > max)
+ max = v[ix][iy];
+ if (v[ix][iy] < min)
+ min = v[ix][iy];
+ }
+ }
+}
+
+void
+ImageFile::writeImagePGM (const char *outfile, int nxcell, int nycell, double densmin, double densmax)
+{
+ FILE *fp;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char rowp [nx * nxcell];
+
+ if ((fp = fopen (outfile, "wb")) == NULL)
+ return;
+
+ fprintf(fp, "P5\n");
+ fprintf(fp, "%d %d\n", nx, ny);
+ fprintf(fp, "255\n");
+
+ for (int irow = ny - 1; irow >= 0; irow--) {
+ for (int icol = 0; icol < nx; icol++) {
+ int pos = icol * nxcell;
+ double dens = (v[icol][irow] - densmin) / (densmax - densmin);
+ dens = clamp (dens, 0., 1.);
+ for (int p = pos; p < pos + nxcell; p++) {
+ rowp[p] = static_cast<unsigned int> (dens * 255.);
+ }
+ }
+ for (int ir = 0; ir < nycell; ir++) {
+ for (int ic = 0; ic < nx * nxcell; ic++)
+ fprintf(fp, "%c ", rowp[ic]);
+ }
+ }
+
+ fclose(fp);
+}
+
+void
+ImageFile::writeImagePGMASCII (const char *outfile, int nxcell, int nycell, double densmin, double densmax)
+{
+ FILE *fp;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char rowp [nx * nxcell];
+ if (rowp == NULL)
+ return;
+
+ if ((fp = fopen (outfile, "wb")) == NULL)
+ return;
+
+ fprintf(fp, "P2\n");
+ fprintf(fp, "%d %d\n", nx, ny);
+ fprintf(fp, "255\n");
+
+ for (int irow = ny - 1; irow >= 0; irow--) {
+ for (int icol = 0; icol < nx; icol++) {
+ int pos = icol * nxcell;
+ double dens = (v[icol][irow] - densmin) / (densmax - densmin);
+ dens = clamp (dens, 0., 1.);
+ for (int p = pos; p < pos + nxcell; p++) {
+ rowp[p] = static_cast<unsigned int> (dens * 255.);
+ }
+ }
+ for (int ir = 0; ir < nycell; ir++) {
+ for (int ic = 0; ic < nx * nxcell; ic++)
+ fprintf(fp, "%d ", rowp[ic]);
+ fprintf(fp, "\n");
+ }
+ }
+
+ fclose(fp);
}
+#ifdef HAVE_PNG
+void
+ImageFile::writeImagePNG (const char *outfile, int bitdepth, int nxcell, int nycell, double densmin, double densmax)
+{
+ FILE *fp;
+ png_structp png_ptr;
+ png_infop info_ptr;
+ double max_out_level = (1 << bitdepth) - 1;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char rowp [nx * nxcell * (bitdepth / 8)];
+
+ if ((fp = fopen (outfile, "wb")) == NULL)
+ return;
+
+ png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (! png_ptr)
+ return;
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (! info_ptr) {
+ png_destroy_write_struct(&png_ptr, (png_infopp) NULL);
+ fclose(fp);
+ return;
+ }
+
+ if (setjmp(png_ptr->jmpbuf)) {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ fclose(fp);
+ return;
+ }
+
+ png_init_io(png_ptr, fp);
+
+ png_set_IHDR(png_ptr, info_ptr, nx * nxcell, ny * nycell, bitdepth, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_DEFAULT);
+
+ png_write_info(png_ptr, info_ptr);
+ for (int irow = ny - 1; irow >= 0; irow--) {
+ png_bytep row_pointer = rowp;
+
+ for (int icol = 0; icol < nx; icol++) {
+ int pos = icol * nxcell;
+ double dens = (v[icol][irow] - densmin) / (densmax - densmin);
+ dens = clamp (dens, 0., 1.);
+ unsigned int outval = static_cast<unsigned int> (dens * max_out_level);
+
+ for (int p = pos; p < pos + nxcell; p++) {
+ if (bitdepth == 8)
+ rowp[p] = outval;
+ else {
+ int rowpos = p * 2;
+ rowp[rowpos] = (outval >> 8) & 0xFF;
+ rowp[rowpos+1] = (outval & 0xFF);
+ }
+ }
+ }
+ for (int ir = 0; ir < nycell; ir++)
+ png_write_rows (png_ptr, &row_pointer, 1);
+ }
+
+ png_write_end(png_ptr, info_ptr);
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+
+ fclose(fp);
+}
+#endif
+
+#ifdef HAVE_GD
+#include "gd.h"
+static const int N_GRAYSCALE=256;
+
+void
+ImageFile::writeImageGIF (const char *outfile, int nxcell, int nycell, double densmin, double densmax)
+{
+ gdImagePtr gif;
+ FILE *out;
+ int gs_indices[N_GRAYSCALE];
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char rowp [nx * nxcell];
+ if (rowp == NULL)
+ return;
+
+ gif = gdImageCreate(nx * nxcell, ny * nycell);
+ for (int i = 0; i < N_GRAYSCALE; i++)
+ gs_indices[i] = gdImageColorAllocate(gif, i, i, i);
+
+ int lastrow = ny * nycell - 1;
+ for (int irow = 0; irow < ny; irow++) {
+ int rpos = irow * nycell;
+ for (int ir = rpos; ir < rpos + nycell; ir++) {
+ for (int icol = 0; icol < nx; icol++) {
+ int cpos = icol * nxcell;
+ double dens = (v[icol][irow] - densmin) / (densmax - densmin);
+ dens = clamp(dens, 0., 1.);
+ for (int ic = cpos; ic < cpos + nxcell; ic++) {
+ rowp[ic] = (unsigned int) (dens * (double) (N_GRAYSCALE - 1));
+ gdImageSetPixel(gif, ic, lastrow - ir, gs_indices[rowp[ic]]);
+ }
+ }
+ }
+ }
+
+ if ((out = fopen(outfile,"w")) == NULL) {
+ sys_error(ERR_FATAL, "Error opening output file %s for writing", outfile);
+ return (1);
+ }
+ gdImageGif(gif,out);
+ fclose(out);
+ gdImageDestroy(gif);
+}
+#endif
+
projects / ctsim.git / blobdiff