From 10dc27a41127d6c040760e5b7a1e66c4a8100aca Mon Sep 17 00:00:00 2001
From: Aurelien Bricier <aurelien.bricier@c-s.fr>
Date: Mon, 24 Jan 2011 15:01:12 +0100
Subject: [PATCH] ENH: better algorithm parametrization
---
Code/FeatureExtraction/otbLineSegmentDetector.txx | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/Code/FeatureExtraction/otbLineSegmentDetector.txx b/Code/FeatureExtraction/otbLineSegmentDetector.txx
index 3f1057331d..0b6c59a5f2 100644
--- a/Code/FeatureExtraction/otbLineSegmentDetector.txx
+++ b/Code/FeatureExtraction/otbLineSegmentDetector.txx
@@ -53,9 +53,9 @@ LineSegmentDetector<TInputImage, TPrecision>
::LineSegmentDetector()
{
- m_DirectionsAllowed = 1. / 8.;
+ m_DirectionsAllowed = 1. / 16.;
m_Prec = CONST_PI * m_DirectionsAllowed;
- m_Threshold = 2.;
+ m_Threshold = 5.2;
/** Compute the modulus and the orientation gradient images */
m_GradientFilter = GradientFilterType::New();
@@ -108,7 +108,7 @@ LineSegmentDetector<TInputImage, TPrecision>
/** Compute the modulus and the orientation gradient image*/
m_GradientFilter->SetInput(castFilter->GetOutput());
- m_GradientFilter->SetSigma(1.3);
+ m_GradientFilter->SetSigma(0.3);
m_MagnitudeFilter->SetInput(m_GradientFilter->GetOutput());
m_OrientationFilter->SetInput(m_GradientFilter->GetOutput());
@@ -169,10 +169,10 @@ LineSegmentDetector<TInputImage, TPrecision>
max = minmaxCalculator->GetMaximum();
/** Compute the threshold on the gradient*/
- m_Threshold = 4 * m_Threshold / vcl_sin(m_Prec) * ((max - min) / 255.); // threshold normalized with min & max of the values
+ m_Threshold = m_Threshold * ((max - min) / 255.); // threshold normalized with min & max of the values
/** Computing the length of the bins*/
- unsigned int NbBin = 10;
+ unsigned int NbBin = 1024;
double lengthBin = static_cast<double>((max - min)) / static_cast<double>(NbBin - 1);
CoordinateHistogramType tempHisto(NbBin); /** Initializing the histogram */
--
GitLab