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edge.cxx | ![]() |
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Find edges by means of a differenceOfExponentialEdgeImage()
Usage: edge infile outfile
/************************************************************************/ /* */ /* Copyright 1998-2002 by Ullrich Koethe */ /* Cognitive Systems Group, University of Hamburg, Germany */ /* */ /* This file is part of the VIGRA computer vision library. */ /* ( Version 1.3.2, Jan 27 2005 ) */ /* You may use, modify, and distribute this software according */ /* to the terms stated in the LICENSE file included in */ /* the VIGRA distribution. */ /* */ /* The VIGRA Website is */ /* http://kogs-www.informatik.uni-hamburg.de/~koethe/vigra/ */ /* Please direct questions, bug reports, and contributions to */ /* koethe@informatik.uni-hamburg.de */ /* */ /* THIS SOFTWARE IS PROVIDED AS IS AND WITHOUT ANY EXPRESS OR */ /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */ /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* */ /************************************************************************/ #include <iostream> #include "vigra/stdimage.hxx" #include "vigra/edgedetection.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: " << vigra::impexListFormats() << ")" << std::endl; return 1; } try { vigra::ImageImportInfo info(argv[1]); vigra_precondition(info.isGrayscale(), "Sorry, cannot operate on color images"); vigra::BImage in(info.width(), info.height()); importImage(info, destImage(in)); // input width of edge detection filter int which; std::cout << "Use Canny or Shen-Castan detector (1 or 2) ? "; std::cin >> which; // input width of edge detection filter double scale; std::cout << "Operator scale ? "; std::cin >> scale; // input threshold for gradient magnitude double threshold; std::cout << "Gradient threshold ? "; std::cin >> threshold; // create output image of appropriate size vigra::BImage out(info.width(), info.height()); // paint output image white out = 255; if(which == 2) { // call edge detection algorithm // edges will be marked black differenceOfExponentialEdgeImage(srcImageRange(in), destImage(out), scale, threshold, 0); } else { // call edge detection algorithm // edges will be marked black cannyEdgeImage(srcImageRange(in), destImage(out), scale, threshold, 0); } exportImage(srcImageRange(out), vigra::ImageExportInfo(argv[2])); } catch (vigra::StdException & e) { std::cout << e.what() << std::endl; return 1; } return 0; }
© Ullrich Köthe (koethe@informatik.uni-hamburg.de) |
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