invert_tutorial.cxx
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Invert an image file (gray scale or color)
Usage: invert infile outfile
#include <iostream>
#include <vigra/multi_array.hxx>
#include <vigra/multi_math.hxx>
int main (int argc, char ** argv)
{
if(argc != 3)
{
std::cout << "Usage: " << argv[0] << " infile outfile" << std::endl;
return 1;
}
try
{
using namespace multi_math;
ImageImportInfo info(argv[1]);
if (info.isGrayscale())
{
MultiArray<2, UInt8> imageArray(info.shape());
imageArray = 255-imageArray;
}
else
{
MultiArray<2, RGBValue<UInt8> > imageArray(info.shape());
RGBValue<UInt8> temp(255,255,255);
imageArray = temp - imageArray;
}
}
catch (std::exception & e)
{
std::cout << e.what() << std::endl;
return 1;
}
return 0;
}
void importImage(...)
Read an image from a file.
void exportImage(...)
Write an image to a file.
image import and export functions
std::string impexListFormats()
List the image formats VIGRA can read and write.