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subimage.cxx |

Read an image file and write out a subimage
Usage: `example_subimage infile outfile`

/************************************************************************/
/* */
/* Copyright 1998-2002 by Ullrich Koethe */
/* */
/* This file is part of the VIGRA computer vision library. */
/* The VIGRA Website is */
/* http://hci.iwr.uni-heidelberg.de/vigra/ */
/* Please direct questions, bug reports, and contributions to */
/* ullrich.koethe@iwr.uni-heidelberg.de or */
/* vigra@informatik.uni-hamburg.de */
/* */
/* Permission is hereby granted, free of charge, to any person */
/* obtaining a copy of this software and associated documentation */
/* files (the "Software"), to deal in the Software without */
/* restriction, including without limitation the rights to use, */
/* copy, modify, merge, publish, distribute, sublicense, and/or */
/* sell copies of the Software, and to permit persons to whom the */
/* Software is furnished to do so, subject to the following */
/* conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the */
/* Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES */
/* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND */
/* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT */
/* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, */
/* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING */
/* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR */
/* OTHER DEALINGS IN THE SOFTWARE. */
/* */
/************************************************************************/
#include <iostream>
#include <vigra/multi_array.hxx>
#include <vigra/stdimagefunctions.hxx>
#include <vigra/impex.hxx>
using namespace vigra;
int main(int argc, char ** argv)
{
if(argc != 3)
{
std::cout << "Usage: " << argv[0] << " infile outfile" << std::endl;
std::cout << "(supported formats: " << impexListFormats() << ")" << std::endl;
return 1;
}
try
{
ImageImportInfo info(argv[1]);
// define upper left and lower right corners of a
// subimage (region of interest)
int sub_x0 = info.width() / 4;
int sub_y0 = info.height() / 4;
int sub_x1 = info.width() - sub_x0;
int sub_y1 = info.height() - sub_y0;
if(info.isGrayscale())
{
MultiArray<2, UInt8> in(info.width(), info.height());
importImage(info, in);
// create an array view for the desired subregion
MultiArrayView<2, UInt8> out = in.subarray(Shape2(sub_x0, sub_y0), Shape2(sub_x1, sub_y1));
exportImage(out, ImageExportInfo(argv[2]));
}
else
{
MultiArray<2, RGBValue<UInt8> > in(info.width(), info.height());
importImage(info, in);
// create an array view for the desired subregion
MultiArrayView<2, RGBValue<UInt8> > out = in.subarray(Shape2(sub_x0, sub_y0), Shape2(sub_x1, sub_y1));
exportImage(out, ImageExportInfo(argv[2]));
}
}
catch (std::exception & e)
{
std::cout << e.what() << std::endl;
return 1;
}
return 0;
}

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.11.1 (Fri May 19 2017)