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vspline 1.1.0
Generic C++11 Code for Uniform B-Splines
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calculating the gradient squared magnitude, derivatives More...
#include <iostream>#include <vspline/vspline.h>#include <vigra/stdimage.hxx>#include <vigra/imageinfo.hxx>#include <vigra/impex.hxx>Go to the source code of this file.
Typedefs | |
| typedef vigra::RGBValue< float, 0, 1, 2 > | pixel_type |
| typedef vigra::TinyVector< float, 2 > | coordinate_type |
| typedef vigra::MultiArray< 2, pixel_type > | target_type |
| typedef vspline::evaluator< coordinate_type, pixel_type > | ev_type |
Functions | |
| int | main (int argc, char *argv[]) |
calculating the gradient squared magnitude, derivatives
implementation of gsm.cc, performing the calculation of the gradient squared magnitude in a loop using two evaluators for the two derivatives, adding the squared magnitudes and writing the result to an image file
compile with: clang++ -std=c++11 -march=native -o gsm -O3 -pthread -DUSE_VC gsm.cc -lvigraimpex -lVc or: clang++ -std=c++11 -march=native -o gsm -O3 -pthread gsm.cc -lvigraimpex (with Vc; use -DUSE_HWY and -lhwy for highway, or -std=c++17 and -DUSE_STDSIMD for the std::simd backend)
invoke passing a colour image file. the result will be written to 'gsm.tif'
Definition in file gsm.cc.
| typedef vigra::TinyVector< float , 2 > coordinate_type |
| typedef vspline::evaluator< coordinate_type , pixel_type > ev_type |
| typedef vigra::RGBValue<float,0,1,2> pixel_type |
| typedef vigra::MultiArray< 2 , pixel_type > target_type |
1.9.4