[Olena-patches] milena r2759: Fix the gaussian_2nd_derivative coef normalisation

URL: https://svn.lrde.epita.fr/svn/oln/branches/cleanup-2008/milena ChangeLog: 2008-11-02 Florian Lesaint <florian.lesaint(a)lrde.epita.fr> Fix the gaussian_2nd_derivative coef normalisation. and remove stretch since it can be a problem with float images. * linear/gaussian.hh: Here. --- gaussian.hh | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) Index: branches/cleanup-2008/milena/mln/linear/gaussian.hh =================================================================== --- branches/cleanup-2008/milena/mln/linear/gaussian.hh (revision 2758) +++ branches/cleanup-2008/milena/mln/linear/gaussian.hh (revision 2759) @@ -329,6 +329,7 @@ float exp2b0 = exp(2.0 * b0); float scale0 = 1 + exp2b0 - 2 * cos0 * expb0; + scale0 *= scale0 * scale0; float scaleA = a1 * sin0 * expb0 * (1 + expb0 * (2 * cos0 * (1 + exp2b0) + exp2b0 - 6)) + a0 * expb0 * (2 * expb0 * (2 - cos0 * cos0) * (1 - exp2b0) - cos0 * (1 - exp2b0 * exp2b0)); @@ -337,6 +338,7 @@ float exp2b1 = exp(2.0 * b1); float scale1 = 1 + exp2b1 - 2 * cos1 * expb1; + scale1 *= scale1 * scale1; float scaleC = c1 * sin1 * expb1 * (1 + expb1 * (2 * cos1 * (1 + exp2b1) + exp2b1 - 6)) + c0 * expb1 * (2 * expb1 * (2 - cos1 * cos1) * (1 - exp2b1) - cos1 * (1 - exp2b1 * exp2b1)); @@ -393,8 +395,8 @@ /* Convert the result image to the user-requested datatype. FIXME: We are making an unnecessary copy in case the user expects a ntg::float_s image. */ - level::stretch(work_img, out); - //level::paste(work_img, out); + //level::stretch(work_img, out); + level::paste(work_img, out); }