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dissolve.cxx |

Dissolve two image files (gray scale or color)
Usage: `dissolve infile1 infile2 outfile`

#include <vigra/multi_array.hxx>
#include <vigra/impex.hxx>
#include <vigra/multi_math.hxx>
#include <iostream>
using namespace vigra;
int main (int argc, char ** argv)
{
if(argc != 4)
{
std::cout << "Usage: " << argv[0] << " infile1 infile2 outfile" << std::endl;
std::cout << "(supported formats: " << impexListFormats() << ")" << std::endl;
return 1;
}
try
{
// read the images given as first and second argument
ImageImportInfo info1(argv[1]),
info2(argv[2]);
// for simplicity, we always use RGB images, even when the inputs are grayscale
// (in which case all three channels will be equal)
MultiArray<2, RGBValue<UInt8> > imageArray1(info1.shape()),
imageArray2(info2.shape());
importImage(info1, imageArray1);
importImage(info2, imageArray2);
// calculate size of dissolved image (take the minimum along both axes)
Shape2 resultShape = min(info1.shape(), info2.shape());
// instantiate array of appropriate size for the dissolved image
MultiArray<2, RGBValue<UInt8> > exportArray(resultShape);
// create subviews for dissolving
// the middle parts of the two images will be dissolved
Shape2 start1 = (info1.shape() - resultShape) / 2,
end1 = start1 + resultShape;
MultiArray<2, RGBValue<UInt8> > subImageArray1 = imageArray1.subarray(start1, end1);
Shape2 start2 = (info2.shape() - resultShape) / 2,
end2 = start2 + resultShape;
MultiArray<2, RGBValue<UInt8> > subImageArray2 = imageArray2.subarray(start2, end2);
// dissolve images
using namespace multi_math;
exportArray = 0.5*subImageArray1 + 0.5*subImageArray2;
// write image data to the file given as third argument
exportImage(exportArray, ImageExportInfo(argv[3]));
}
catch (std::exception & e)
{
// catch any errors that might have occurred and print their reason
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 1.11.0 (Fri May 19 2017)