[Olena-patches] olena-2.0-76-g9891bf6 Improve the test of the Fast Fourier Transform.

* tests/transform/fft.cc: Ensure the inverse transform of the transform is pretty much the same as the input image. Save the cropped transform. Remove dead code. * tests/transform/Makefile.am (MOSTLYCLEANFILES): Add fft_trans_cropped.pgm. --- milena/ChangeLog | 11 +++++++++++ milena/tests/transform/Makefile.am | 1 + milena/tests/transform/fft.cc | 18 ++++++++++++++++-- 3 files changed, 28 insertions(+), 2 deletions(-) diff --git a/milena/ChangeLog b/milena/ChangeLog index 037656f..bd06a16 100644 --- a/milena/ChangeLog +++ b/milena/ChangeLog @@ -1,5 +1,16 @@ 2012-10-09 Roland Levillain &lt;roland(a)lrde.epita.fr&gt; + Improve the test of the Fast Fourier Transform. + + * tests/transform/fft.cc: Ensure the inverse transform of the + transform is pretty much the same as the input image. + Save the cropped transform. + Remove dead code. + * tests/transform/Makefile.am (MOSTLYCLEANFILES): + Add fft_trans_cropped.pgm. + +2012-10-09 Roland Levillain &lt;roland(a)lrde.epita.fr&gt; + Update copyright headers. * mln/transform/fft.hh, diff --git a/milena/tests/transform/Makefile.am b/milena/tests/transform/Makefile.am index f458a92..2eaad1f 100644 --- a/milena/tests/transform/Makefile.am +++ b/milena/tests/transform/Makefile.am @@ -54,4 +54,5 @@ MOSTLYCLEANFILES = \ fft_copy.pgm \ fft_low_pass.pgm \ fft_trans_clipped.pgm \ + fft_trans_cropped.pgm \ fft_trans_log.pgm diff --git a/milena/tests/transform/fft.cc b/milena/tests/transform/fft.cc index c5c5bec..1dce9df 100644 --- a/milena/tests/transform/fft.cc +++ b/milena/tests/transform/fft.cc @@ -30,6 +30,12 @@ #include <mln/opt/at.hh> #include <mln/debug/println.hh> +#include <mln/core/image/flat_image.hh> +#include <mln/fun/vv2b/le.hh> +#include <mln/fun/vv2v/diff_abs.hh> +#include <mln/data/transform.hh> +#include <mln/test/predicate.hh> + #include "tests/data.hh" #define CHECK(Condition) \ @@ -61,11 +67,16 @@ int main () io::pgm::save(im3, "fft_copy.pgm"); image2d<int_u8> fft = fourier.transformed_image_log_magn<int_u8>(true); - // debug::println(fourier.transformed_image()); io::pgm::save(fft, "fft.pgm"); std::cout << "Test: Image == F-1(F(Image)) ... " << std::flush; - // CHECK (im1 == im3); + /* FIXME: Milena lacks some feature to make write the following in a + shorter fashion (fun-morpher accepting binary (vv2v) functions or + function composition in pw-functions. */ + CHECK(test::predicate(data::transform(im1, im3, + fun::vv2v::diff_abs<int_u8>()), + flat_image<int_u8, box2d>(1, im1.domain()), + fun::vv2b::le<int_u8>())); image2d<int_u8> out = fourier.transformed_image_clipped_magn<int_u8>(0.01); @@ -83,6 +94,9 @@ int main () for (int col = 40; col < im2.ncols() - 40; ++col) opt::at(im2, row, col) = 0; + fft = fourier.transformed_image_log_magn<int_u8>(true); + io::pgm::save(fft, "fft_trans_cropped.pgm"); + out = fourier.transform_inv<int_u8>(); io::pgm::save(out, "fft_low_pass.pgm"); -- 1.7.2.5