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colorHistogram.cpp
// This may look like C code, but it is really -*- C++ -*-
//
// Copyright Bob Friesenhahn, 2003
//
// Test STL colorHistogram function
//
#undef USE_VECTOR
#define USE_MAP
#include <Magick++.h>
#include <string>
#include <iostream>
#include <iomanip>
#if defined(USE_VECTOR)
# include <vector>
# include <utility>
#endif
#if defined(USE_MAP)
# include <map>
#endif
using namespace std;
using namespace Magick;
int main( int /*argc*/, char ** argv)
{
// Initialize ImageMagick install location for Windows
MagickPlusPlusGenesis genesis(*argv);
int failures=0;
try {
string srcdir("");
if(getenv("SRCDIR") != 0)
srcdir = getenv("SRCDIR");
// Read image
Image image;
image.read( srcdir + "test_image.miff" );
// Create histogram vector
#if defined(USE_MAP)
std::map<Color,size_t> histogram;
#elif defined(USE_VECTOR)
std::vector<std::pair<Color,size_t> > histogram;
#endif
colorHistogram( &histogram, image );
// Print out histogram
#if (MAGICKCORE_QUANTUM_DEPTH == 8)
int quantum_width=3;
#elif (MAGICKCORE_QUANTUM_DEPTH == 16)
int quantum_width=5;
#else
int quantum_width=10;
#endif
cout << "Histogram for file \"" << image.fileName() << "\"" << endl
<< histogram.size() << " entries:" << endl;
#if defined(USE_MAP)
std::map<Color,size_t>::const_iterator p=histogram.begin();
#elif defined(USE_VECTOR)
std::vector<std::pair<Color,size_t> >::const_iterator p=histogram.begin();
#endif
while (p != histogram.end())
{
cout << setw(10) << (int)p->second << ": ("
<< setw(quantum_width) << (int)p->first.quantumRed() << ","
<< setw(quantum_width) << (int)p->first.quantumGreen() << ","
<< setw(quantum_width) << (int)p->first.quantumBlue() << ")"
<< endl;
p++;
}
}
catch( Exception &error_ )
{
cout << "Caught exception: " << error_.what() << endl;
return 1;
}
catch( exception &error_ )
{
cout << "Caught exception: " << error_.what() << endl;
return 1;
}
if ( failures )
{
cout << failures << " failures" << endl;
return 1;
}
return 0;
}
Magick::Exception
Definition Exception.h:25
Magick::Image
Definition Image.h:56
Magick::MagickPlusPlusGenesis
Definition Functions.h:44