** This is part of the CTSim program
** Copyright (C) 1983-2000 Kevin Rosenberg
**
-** $Id: imagefile.cpp,v 1.2 2000/06/20 17:54:51 kevin Exp $
+** $Id: imagefile.cpp,v 1.23 2000/12/21 03:40:58 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
#include "ct.h"
-///////////////////////////////////////////////////////////////////////////
-// CLASS IMPLEMENTATION
-//
-// Name: Array2dFileLabel
-// Purpose: Labels for Array2dFiles
-///////////////////////////////////////////////////////////////////////////
+F32Image::F32Image (int nx, int ny)\r
+: Array2dFile (nx, ny, sizeof(kfloat32), Array2dFile::PIXEL_FLOAT32)\r
+{\r
+}\r
+\r
+F32Image::F32Image (void)\r
+: Array2dFile()\r
+{\r
+ setPixelFormat (Array2dFile::PIXEL_FLOAT32);\r
+ setPixelSize (sizeof(kfloat32));\r
+}\r
+\r
+F64Image::F64Image (int nx, int ny)\r
+: Array2dFile (nx, ny, sizeof(kfloat64), Array2dFile::PIXEL_FLOAT64)\r
+{\r
+}\r
+\r
+F64Image::F64Image (void)\r
+: Array2dFile ()\r
+{\r
+ setPixelFormat (PIXEL_FLOAT64);\r
+ setPixelSize (sizeof(kfloat64));\r
+}\r
-void
-Array2dFileLabel::init (void)
+void
+ImageFile::filterResponse (const char* const domainName, double bw, const char* const filterName, double filt_param)
{
- m_calcTime = 0;
- m_labelType = L_EMPTY;
- TIMEDATE td;
- td_get_tmdt (&td);
- m_year = td.d.year;
- m_month = td.d.month;
- m_day = td.d.date;
- m_hour = td.t.hour;
- m_minute = td.t.minute;
- m_second = td.t.second;
+ int hx = (m_nx - 1) / 2;
+ int hy = (m_ny - 1) / 2;
+ ImageFileArray v = getArray();
+ SignalFilter filter (filterName, domainName, bw, filt_param);
+
+ for (int i = -hx; i <= hx; i++) {
+ for (int j = -hy; j <= hy; j++) {
+ double r = sqrt (i * i + j * j);
+
+ v[i+hx][j+hy] = filter.response (r);
+ }
+ }
}
-Array2dFileLabel::Array2dFileLabel()
+int
+ImageFile::display (void) const
{
- init();
+ double pmin, pmax;
+
+ getMinMax (pmin, pmax);
+
+ return (displayScaling (1, pmin, pmax));
}
-Array2dFileLabel::Array2dFileLabel(const char* const str, double ctime = 0.)
- : m_strLabel (str)
+int
+ImageFile::displayScaling (const int scale, const ImageFileValue pmin, const ImageFileValue pmax) const
{
- init();
-
- m_labelType = L_USER;
- m_calcTime = ctime;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArrayConst v = getArray();
+ if (v == NULL || nx == 0 || ny == 0)
+ return 0;
+
+#if HAVE_G2_H
+ int* pPens = new int [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);
+ }
+
+ for (int iy = ny - 1; iy >= 0; iy--) {
+ int iRowPos = ((ny - 1 - iy) * scale) * (nx * scale);
+ for (int ix = 0; ix < nx; ix++) {
+ int cval = static_cast<int>((v[ix][iy] - pmin) * view_scale);
+ if (cval < 0)
+ cval = 0;
+ else if (cval > 255)
+ cval = 255;
+ for (int sy = 0; sy < scale; sy++)
+ for (int sx = 0; sx < scale; sx++)
+ pPens[iRowPos+(sy * nx * scale)+(sx + (ix * scale))] = grayscale[cval];
+ }
+ }
+
+ g2_image (id_X11, 0., 0., nx * scale, ny * scale, pPens);
+
+ delete pPens;
+ return (id_X11);
+#else
+ return 0;
+#endif
}
-Array2dFileLabel::Array2dFileLabel(const int type, const char* const str, double ctime = 0.)
- : m_strLabel (str)
-{
- init();
- m_labelType = type;
- m_calcTime = ctime;
+
+// ImageFile::comparativeStatistics Calculate comparative stats
+//
+// OUTPUT
+// d Normalized root mean squared distance measure
+// r Normalized mean absolute distance measure
+// e Worst case distance measure
+//
+// REFERENCES
+// G.T. Herman, Image Reconstruction From Projections, 1980
+
+bool
+ImageFile::comparativeStatistics (const ImageFile& imComp, double& d, double& r, double& e) const
+{
+ if (imComp.nx() != m_nx && imComp.ny() != m_ny) {
+ sys_error (ERR_WARNING, "Image sizes differ [ImageFile::comparativeStatistics]");
+ return false;
+ }
+ ImageFileArrayConst v = getArray();
+ if (v == NULL || m_nx == 0 || m_ny == 0)
+ return false;
+
+ ImageFileArrayConst vComp = imComp.getArray();
+
+ double myMean = 0.;
+ for (unsigned int ix = 0; ix < m_nx; ix++) {
+ for (unsigned int iy = 0; iy < m_ny; iy++) {
+ myMean += v[ix][iy];
+ }
+ }
+ myMean /= (m_nx * m_ny);
+
+ double sqErrorSum = 0.;
+ double absErrorSum = 0.;
+ double sqDiffFromMeanSum = 0.;
+ double absValueSum = 0.;
+ for (unsigned int ix2 = 0; ix2 < m_nx; ix2++) {
+ for (unsigned int iy = 0; iy < m_ny; iy++) {
+ double diff = v[ix2][iy] - vComp[ix2][iy];
+ sqErrorSum += diff * diff;
+ absErrorSum += fabs(diff);
+ double diffFromMean = v[ix2][iy] - myMean;
+ sqDiffFromMeanSum += diffFromMean * diffFromMean;
+ absValueSum += fabs(v[ix2][iy]);
+ }
+ }
+
+ d = sqrt (sqErrorSum / sqDiffFromMeanSum);
+ r = absErrorSum / absValueSum;
+
+ int hx = m_nx / 2;
+ int hy = m_ny / 2;
+ double eMax = -1;
+ for (int ix3 = 0; ix3 < hx; ix3++) {
+ for (int iy = 0; iy < hy; iy++) {
+ double avgPixel = 0.25 * (v[2*ix3][2*iy] + v[2*ix3+1][2*iy] + v[2*ix3][2*iy+1] + v[2*ix3+1][2*iy+1]);
+ double avgPixelComp = 0.25 * (vComp[2*ix3][2*iy] + vComp[2*ix3+1][2*iy] + vComp[2*ix3][2*iy+1] + vComp[2*ix3+1][2*iy+1]);
+ double error = fabs (avgPixel - avgPixelComp);
+ if (error > eMax)
+ eMax = error;
+ }
+ }
+
+ e = eMax;
+
+ return true;
}
-Array2dFileLabel::~Array2dFileLabel()
+
+bool
+ImageFile::printComparativeStatistics (const ImageFile& imComp, std::ostream& os) const
{
+ double d, r, e;
+
+ if (comparativeStatistics (imComp, d, r, e)) {
+ os << " Normalized root mean squared distance (d): " << d << std::endl;
+ os << " Normalized mean absolute distance (r): " << r << std::endl;
+ os << "Worst case distance (2x2 pixel average) (e): " << e << std::endl;
+ return true;
+ }
+ return false;
}
-const string&
-Array2dFileLabel::getDateString (void) const
+
+void
+ImageFile::printStatistics (std::ostream& os) const
{
- ostringstream oss;
- oss << m_month <<"/"<< m_day <<"/"<< m_year << " " << m_hour <<":"<< m_minute <<":"<< m_second;
- m_strDate = oss.str();
- return m_strDate;
+ double min, max, mean, mode, median, stddev;
+
+ statistics (min, max, mean, mode, median, stddev);
+
+ os << " min: " << min << std::endl;
+ os << " max: " << max << std::endl;
+ os << " mean: " << mean << std::endl;
+ os << " mode: " << mode << std::endl;
+ os << "median: " << median << std::endl;
+ os << "stddev: " << stddev << std::endl;
}
-/* FILE
- * image.c Routines for managing images
- *
- * PROGRAMMER: Kevin Rosenberg
- * DATE: Aug 1984
- *
- * FUNCTION
- * Provides a set of routines for handling image files
- */
+void
+ImageFile::statistics (double& min, double& max, double& mean, double& mode, double& median, double& stddev) const
+{
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArrayConst v = getArray();
+
+ if (v == NULL || nx == 0 || ny == 0)
+ return;
+\r
+ std::vector<double> vecImage;\r
+ int iVec = 0;\r
+ vecImage.resize (nx * ny);\r
+ for (int ix = 0; ix < nx; ix++) {\r
+ for (int iy = 0; iy < ny; iy++)\r
+ vecImage[iVec++] = v[ix][iy];\r
+ }\r
+\r
+ vectorNumericStatistics (vecImage, nx * ny, min, max, mean, mode, median, stddev);\r
+}
-void
-image_filter_response (ImageFile& im, const DomainType domain, double bw, const FilterType filt_type, double filt_param, const int opt_trace)
+void
+ImageFile::getMinMax (double& min, double& max) const
{
- int hx = im.nx() / 2;
- int hy = im.ny() / 2;
- ImageFileArray v = im.getArray();
-
- for (int i = -hx; i <= hx; i++) {
- for (int j = -hy; j <= hy; j++) {
- double r = sqrt(i * i + j * j);
-
- if (domain == D_SPATIAL)
- v[i+hx][j+hy] = SignalFilter::spatialResponseAnalytic (filt_type, bw, r, filt_param);
- else
- v[i+hx][j+hy] = SignalFilter::frequencyResponse (filt_type, bw, r, filt_param);
- if (opt_trace >= TRACE_PHM)
- printf ("r=%8.4f, v=%8.4f\n", r, v[i+hx][j+hy]);
+ 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];
+ }
}
- }
}
-int
-image_display (const ImageFile& im)
+void
+ImageFile::writeImagePGM (const char *outfile, int nxcell, int nycell, double densmin, double densmax)
{
- ImageFileValue pmin, pmax;
-
- im.getPixelValueRange (pmin, pmax);
-
- return (image_display_scale (im, 1, pmin, pmax));
+ FILE *fp;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char* rowp = new unsigned char [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++)
+ fputc( rowp[ic], fp );
+ }
+ }
+ \r
+ delete rowp;
+ fclose(fp);
}
-int image_display_scale (const ImageFile& im, const int scale, const double pmin, const double pmax)
+void
+ImageFile::writeImagePGMASCII (const char *outfile, int nxcell, int nycell, double densmin, double densmax)
{
- int grayscale[256];
- int nx = im.nx();
- int ny = im.ny();
- ImageFileArray v = im.getArray();
-
-#if HAVE_G2_H
- int* pens = new int [nx * ny * scale * scale ];
-
- double view_scale = 255 / (pmax - pmin);
- int id_X11 = g2_open_X11 (nx * scale, ny * scale);
-
- for (int i = 0; i < 256; i++) {
- double cval = i / 255.;
- grayscale[i] = g2_ink (id_X11, cval, cval, cval);
- }
-
- for (int i= 0, iy = ny - 1; iy >= 0; iy--) {
- for (int ix = 0; ix < nx; ix++) {
- int cval = (int) ((v[ix][iy] - pmin) * view_scale);
- if (cval < 0)
- cval = 0;
- else if (cval > 255)
- cval = 255;
- pens[i++] = grayscale[cval];
+ FILE *fp;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char* rowp = new unsigned char [nx * nxcell];
+
+ 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");
+ }
}
- }
-
- g2_image (id_X11, 0., 0., nx, ny, pens);
+ \r
+ delete rowp;
+ fclose(fp);
+}
- delete [] pens;
- return (id_X11);
-#endif
+#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 = new unsigned char [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);
+ delete rowp;\r
+
+ 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