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transpose_image_tutorial.cxx

Transpose an image file about major or minor axis
Usage: transpose_image_tutorial infile outfile

#include <iostream>
#include <vigra/multi_array.hxx>
#include <vigra/impex.hxx>
#include <vigra/basicgeometry.hxx>
using namespace vigra;
int main(int argc, char ** argv)
{
if(argc != 3)
{
std::cout << "Usage: " << argv[0] << " infile outfile" << std::endl;
std::cout << "(grayscale images only, supported formats: " << impexListFormats() << ")" << std::endl;
return 1;
}
// choose diagonal for transpose
std::cout << "Transpose about which diagonal?\n";
std::cout << "1 - major\n";
std::cout << "2 - minor\n";
int mode;
std::cin >> mode;
try
{
// read image given as first command line argument
MultiArray<2, UInt8> imageArray;
importImage(argv[1], imageArray);
if(mode == 1)
{
// when transposing about the major diagonal, we can simply
// write a transposed view to the file given as second argument
exportImage(imageArray.transpose(), argv[2]);
}
else
{
// when transposing about the minor diagonal, we need a new
// image with reversed shape to hold the transposed data
MultiArray<2, UInt8> transposed(reverse(imageArray.shape()));
transposeImage(imageArray, transposed, minor);
exportImage(transposed, argv[2]);
}
}
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;
}
vigra::MultiArray
Main MultiArray class containing the memory management.
Definition multi_array.hxx:2483
vigra::exportImage
void exportImage(...)
Write an image to a file.
vigra::importImage
void importImage(...)
Read an image from a file.
impex.hxx
image import and export functions
vigra
vigra::impexListFormats
std::string impexListFormats()
List the image formats VIGRA can read and write.
vigra::transposeImage
void transposeImage(...)
Transpose an image over the major or minor diagonal.

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.12.4