[Olena-patches] olena-2.0-93-g6e6efc3 scribo/binarization/sauvola_ms.hh: Change area thresholds.

--- scribo/ChangeLog | 4 +++ scribo/scribo/binarization/sauvola_ms.hh | 37 +++++++++++++++++------------ 2 files changed, 26 insertions(+), 15 deletions(-) diff --git a/scribo/ChangeLog b/scribo/ChangeLog index 5383b57..9c1b5dd 100644 --- a/scribo/ChangeLog +++ b/scribo/ChangeLog @@ -1,5 +1,9 @@ 2012-08-23 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + * scribo/binarization/sauvola_ms.hh: Change area thresholds. + +2012-08-23 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + * scribo/binarization/sauvola_ms.hh: More fixes in debug. 2012-08-23 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; diff --git a/scribo/scribo/binarization/sauvola_ms.hh b/scribo/scribo/binarization/sauvola_ms.hh index 0abef14..63ea38f 100644 --- a/scribo/scribo/binarization/sauvola_ms.hh +++ b/scribo/scribo/binarization/sauvola_ms.hh @@ -156,6 +156,8 @@ namespace scribo w_local_h = w_local, w_local_w = w_local; + std::cout << "scale " << i << " - w = " << w << " - lambda_min = " << lambda_min << " - lambda_max = " << lambda_max << std::endl; + // Make sure the window fits in the image domain. if (w_local_w >= static_cast<const unsigned>(integral_sum_sum_2.ncols())) { @@ -180,6 +182,7 @@ namespace scribo ++w_local_h; } + std::cout << "Scale " << i << " - w_h = " << w_local_h << " - w_w = " << w_local_w << " - w = " << w << std::endl; // 1st pass scribo::binarization::internal::sauvola_ms_functor< image2d<int_u8> > @@ -787,21 +790,16 @@ namespace scribo dpoint2d none(0, 0); - unsigned lambda_min_1 = w_1 / 2; - // Number of subscales. unsigned nb_subscale = 3; // Window size. - unsigned w_work = w_1 / s; // Scale 2 + unsigned w_work = w_1 * s; // Scale 2 // Subscale step. unsigned q = 2; - unsigned lambda_min_2 = lambda_min_1 / s; - unsigned lambda_max_2 = lambda_min_2 * q; - mln::util::array<I> t_ima; @@ -869,13 +867,23 @@ namespace scribo initialize(e_2, sub_ima[2]); data::fill(e_2, 0u); + // Computing optimal object area for each scale. + unsigned w_1_sq = w_1 * w_1; + unsigned q_2 = std::pow(float(q), float(2)); + unsigned min_area = (5 * w_1_sq) / (4 * q_2); + unsigned max_area = (w_1_sq + (q_2) * w_1_sq) / 4; + + + // mln::util::array<unsigned> area(sub_ima.size(), 0); + // area[2] = s * s * w_1 * w_1; + // for (unsigned i = 3; i < area.nelements(); ++i) + // area[i] = std::pow(float(q), float(i * 2 - 4)) * area[2]; + // Highest scale -> no maximum component size. { int i = sub_ima.size() - 1; - // Cast to float is needed on MacOS X. - unsigned ratio = unsigned(std::pow(float(q), float(i - 2))); // Ratio compared to e_2 t_ima[i] = internal::compute_t_n_and_e_2(sub_ima[i], e_2, - lambda_min_2 / ratio, + min_area, mln_max(unsigned), s, q, i, w_work, @@ -887,11 +895,9 @@ namespace scribo { for (int i = sub_ima.size() - 2; i > 2; --i) { - // Cast to float is needed on MacOS X. - unsigned ratio = unsigned(std::pow(float(q), float(i - 2))); // Ratio compared to e_2 t_ima[i] = internal::compute_t_n_and_e_2(sub_ima[i], e_2, - lambda_min_2 / ratio, - lambda_max_2 / ratio, + min_area, + max_area, s, q, i, w_work, integral_sum_sum_2, @@ -901,8 +907,9 @@ namespace scribo // Lowest scale -> no minimum component size. { - t_ima[2] = internal::compute_t_n_and_e_2(sub_ima[2], e_2, 0, - lambda_max_2, + t_ima[2] = internal::compute_t_n_and_e_2(sub_ima[2], e_2, + 0, + max_area, s, 1, 2, w_work, integral_sum_sum_2, K); -- 1.7.2.5