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New line extraction method and OpenCV standards accomplished

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pull/37/head
biagio montesano 11 years ago
parent d79ae76a52
commit d5eeb91dbc
9 changed files with 889 additions and 14 deletions
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  1. 3
      modules/line_descriptor/CMakeLists.txt
  2. 3
      modules/line_descriptor/CMakeLists.txt~
  3. 54
      modules/line_descriptor/include/opencv2/line_descriptor.hpp
  4. 135
      modules/line_descriptor/include/opencv2/line_descriptor/descriptor.hpp
  5. 59
      modules/line_descriptor/include/opencv2/line_descriptor/line_detector.hpp~
  6. 52
      modules/line_descriptor/include/opencv2/line_detector.hpp~
  7. 571
      modules/line_descriptor/src/BinaryDescriptor.cpp
  8. 14
      modules/line_descriptor/src/line_descriptor_init.cpp
  9. 12
      modules/line_descriptor/src/precomp.hpp

3
modules/line_descriptor/CMakeLists.txt
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set(the_description "Line descriptor")
ocv_define_module(line_descriptor opencv_imgproc opencv_optim)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${BIAS_CXX_FLAGS} -std=c++0x")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${BIAS_C_FLAGS}")

3
modules/line_descriptor/CMakeLists.txt~
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set(the_description "Line descriptor")
ocv_define_module(line_descriptor opencv_imgproc opencv_optim)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${BIAS_CXX_FLAGS} -std=c++0x")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${BIAS_C_FLAGS}")

54
modules/line_descriptor/include/opencv2/line_descriptor.hpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#ifndef __OPENCV_LINE_DESCRIPTOR_HPP__
#define __OPENCV_LINE_DESCRIPTOR_HPP__
#include "opencv2/line_descriptor/descriptor.hpp"
#include "opencv2/core.hpp"
namespace cv
{
CV_EXPORTS bool initModule_line_descriptor(void);
}
#endif

135
modules/line_descriptor/include/opencv2/line_descriptor/descriptor.hpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//#ifdef __OPENCV_BUILD
//#error this is a compatibility header which should not be used inside the OpenCV library
//#endif
#ifndef __OPENCV_DESCRIPTOR_HPP__
#define __OPENCV_DESCRIPTOR_HPP__
#include "LineStructure.hpp"
#include "opencv2/core.hpp"
namespace cv
{
class CV_EXPORTS_W LineDescriptor : public virtual Algorithm
{
public:
virtual ~LineDescriptor();
void getLineBinaryDescriptor(std::vector<cv::Mat> & oct_binaryDescMat);
protected:
virtual void getLineBinaryDescriptorImpl(std::vector<cv::Mat> & oct_binaryDescMat,
ScaleLines &keyLines);
};
class CV_EXPORTS_W BinaryDescriptor : public LineDescriptor
{
public:
struct CV_EXPORTS_W_SIMPLE Params{
CV_WRAP Params();
/* global threshold for line descriptor distance, default is 0.35 */
CV_PROP_RW float LowestThreshold;
/* the NNDR threshold for line descriptor distance, default is 0.6 */
CV_PROP_RW float NNDRThreshold;
/* the size of Gaussian kernel: ksize X ksize, default value is 5 */
CV_PROP_RW int ksize_;
/* the number of image octaves (default = 5) */
CV_PROP_RW int numOfOctave_;
/* the number of bands used to compute line descriptor (default: 9) */
CV_PROP_RW int numOfBand_;
/* the width of band; (default: 7) */
CV_PROP_RW int widthOfBand_;
/* image's reduction ratio in construction of Gaussian pyramids */
CV_PROP_RW int reductionRatio;
void read( const FileNode& fn );
void write( FileStorage& fs ) const;
};
CV_WRAP BinaryDescriptor(const BinaryDescriptor::Params &parameters =
BinaryDescriptor::Params());
virtual void read( const cv::FileNode& fn );
virtual void write( cv::FileStorage& fs ) const;
void getLineBinaryDescriptor(cv::Mat & oct_binaryDescMat, ScaleLines &keyLines);
protected:
virtual void getLineBinaryDescriptorImpl(std::vector<cv::Mat> & oct_binaryDescMat, ScaleLines &keyLines);
AlgorithmInfo* info() const;
Params params;
private:
unsigned char binaryTest(float* f1, float* f2);
int ComputeLBD_(ScaleLines &keyLines);
/* the local gaussian coefficient apply to the orthogonal line direction within each band */
std::vector<float> gaussCoefL_;
/* the global gaussian coefficient apply to each Row within line support region */
std::vector<float> gaussCoefG_;
/* vector to store horizontal and vertical derivatives of octave images */
std::vector<cv::Mat> dxImg_vector, dyImg_vector;
/* vectot to store sizes of octave images */
std::vector<cv::Size> images_sizes;
};
}
#endif

59
modules/line_descriptor/include/opencv2/line_descriptor/line_detector.hpp~
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//#ifdef __OPENCV_BUILD
//#error this is a compatibility header which should not be used inside the OpenCV library
//#endif
#ifndef __OPENCV_LINE_DETECTOR_HPP__
#define __OPENCV_LINE_DETECTOR_HPP__
#include <algorithm>
#include "opencv2/core/utility.hpp"
#include "opencv2/core/private.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <opencv2/features2d/features2d.hpp>
#include <opencv2/highgui/highgui.hpp>
#include "LineDescriptor.hpp"
#include "LineStructure.hpp"
#endif

52
modules/line_descriptor/include/opencv2/line_detector.hpp~
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#ifndef __OPENCV_TRACKING_HPP__
#define __OPENCV_TRACKING_HPP__
#include "opencv2/line_descriptor/line_detector.hpp"
namespace cv
{
CV_EXPORTS bool initModule_line_descriptor(void);
}
#endif //__OPENCV_TRACKING_HPP__

571
modules/line_descriptor/src/BinaryDescriptor.cpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "precomp.hpp"
//#include "opencv2/line_descriptor/descriptor.hpp"
using namespace cv;
/* return default parameters */
BinaryDescriptor::Params::Params()
{
LowestThreshold = 0.35;
NNDRThreshold = 0.6;
ksize_ = 5;
numOfOctave_ = 5;
numOfBand_ = 9;
widthOfBand_ = 7;
reductionRatio = 2;
}
/* read parameters from a FileNode object and store them (struct function) */
void BinaryDescriptor::Params::read(const cv::FileNode& fn )
{
LowestThreshold = fn["LowestThreshold"];
NNDRThreshold = fn["NNDRThreshold"];
ksize_ = fn["ksize_"];
numOfOctave_ = fn["numOfOctave_"];
numOfBand_ = fn["numOfBand_"];
widthOfBand_ = fn["widthOfBand_"];
reductionRatio = fn["reductionRatio"];
}
/* store parameters to a FileStorage object (struct function) */
void BinaryDescriptor::Params::write(cv::FileStorage& fs) const
{
fs << "LowestThreshold" << LowestThreshold;
fs << "NNDRThreshold" << NNDRThreshold;
fs << "ksize_" << ksize_;
fs << "numOfOctave_" << numOfOctave_;
fs << "numOfBand_" << numOfBand_;
fs << "widthOfBand_" << widthOfBand_;
fs << "reductionRatio" << reductionRatio;
}
/* construct a BinaryDescrptor object and compute external private parameters */
BinaryDescriptor::BinaryDescriptor(const BinaryDescriptor::Params &parameters) : params(parameters)
{
/* prepare a vector to host local weights F_l*/
gaussCoefL_.resize(params.widthOfBand_*3);
/* compute center of central band (every computation involves 2-3 bands) */
double u = (params.widthOfBand_*3-1)/2;
/* compute exponential part of F_l */
double sigma = (params.widthOfBand_*2+1)/2;// (widthOfBand_*2+1)/2;
double invsigma2 = -1/(2*sigma*sigma);
/* compute all local weights */
double dis;
for(int i=0; i<params.widthOfBand_*3; i++)
{
dis = i-u;
gaussCoefL_[i] = exp(dis*dis*invsigma2);
}
/* prepare a vector for global weights F_g*/
gaussCoefG_.resize(params.numOfBand_*params.widthOfBand_);
/* compute center of LSR */
u = (params.numOfBand_*params.widthOfBand_-1)/2;
/* compute exponential part of F_g */
sigma = u;
invsigma2 = -1/(2*sigma*sigma);
for(int i=0; i<params.numOfBand_*params.widthOfBand_; i++)
{
dis = i-u;
gaussCoefG_[i] = exp(dis*dis*invsigma2);
}
}
/* read parameters from a FileNode object and store them (class function ) */
void BinaryDescriptor::read( const cv::FileNode& fn )
{
params.read(fn);
}
/* store parameters to a FileStorage object (class function) */
void BinaryDescriptor::write( cv::FileStorage& fs ) const
{
params.write(fs);
}
/* extract lines from an image and compute their descriptors */
void BinaryDescriptor::getLineBinaryDescriptor(cv::Mat & oct_binaryDescMat, ScaleLines &keyLines)
{
/* prepare a matrix to store Gaussian pyramid of input matrix */
std::vector<cv::Mat> matVec(params.numOfOctave_);
/* reinitialize structures for hosting images' derivatives and sizes
(they may have been used in the past) */
dxImg_vector.clear();
dyImg_vector.clear();
images_sizes.clear();
dxImg_vector.resize(params.numOfOctave_);
dyImg_vector.resize(params.numOfOctave_);
images_sizes.resize(params.numOfOctave_);
/* insert input image into pyramid */
cv::Mat currentMat = oct_binaryDescMat.clone();
matVec.push_back(currentMat);
images_sizes.push_back(currentMat.size());
/* compute and store derivatives of input image */
cv:Mat currentDx, currentDy;
cv::Sobel( currentMat, currentDx, CV_16SC1, 1, 0, 3);
cv::Sobel( currentMat, currentDy, CV_16SC1, 0, 1, 3);
dxImg_vector.push_back(currentDx);
dyImg_vector.push_back(currentDy);
/* fill Gaussian pyramid */
for(int i = 1; i<params.numOfOctave_; i++)
{
/* compute and store next image in pyramid and its size */
pyrDown( currentMat, currentMat, Size( currentMat.cols/params.reductionRatio, currentMat.rows/params.reductionRatio ));
matVec.push_back(currentMat);
images_sizes.push_back(currentMat.size());
/* compute and store derivatives of new image */
cv::Sobel( currentMat, currentDx, CV_16SC1, 1, 0, 3);
cv::Sobel( currentMat, currentDy, CV_16SC1, 0, 1, 3);
dxImg_vector.push_back(currentDx);
dyImg_vector.push_back(currentDy);
}
/* compute descriptors */
getLineBinaryDescriptorImpl(matVec, keyLines);
}
/* compute descriptors */
void BinaryDescriptor::getLineBinaryDescriptorImpl(std::vector<cv::Mat> & oct_binaryDescMat, ScaleLines &keyLines)
{
for(size_t scaleCounter = 0; scaleCounter<oct_binaryDescMat.size(); scaleCounter++)
{
/* get current scaled image */
cv::Mat currentScaledImage = oct_binaryDescMat[scaleCounter];
/* create an LSD detector and store a pointer to it */
cv::Ptr<cv::LineSegmentDetector> ls = cv::createLineSegmentDetector(cv::LSD_REFINE_STD);
/* prepare a vectore to host extracted segments */
std::vector<cv::Vec4i> lines_std;
/* use detector to extract segments */
ls->detect(currentScaledImage, lines_std);
/* store information for every extracted segment */
for (size_t lineCounter = 0; lineCounter<lines_std.size(); lineCounter++)
{
/* get current segment and store its extremes */
const cv::Vec4i v = lines_std[lineCounter];
cv::Point b(v[0], v[1]);
cv::Point e(v[2], v[3]);
/* create an object to store line information */
OctaveSingleLine osl;
osl.startPointX = b.x;
osl.startPointY = b.y;
osl.endPointX = e.x;
osl.endPointY = e.y;
osl.sPointInOctaveX = b.x;
osl.sPointInOctaveY = b.y;
osl.ePointInOctaveX = e.x;
osl.ePointInOctaveY = e.y;
osl.direction = 0;
osl.salience = 0;
osl.lineLength = 0;
osl.numOfPixels = std::sqrt((b.x-e.x)*(b.x-e.x) + (b.y-e.y)*(b.y-e.y));
osl.octaveCount = scaleCounter;
/* create a new LineVec and add new line to it */
LinesVec lineScaleLs;
lineScaleLs.push_back(osl);
/* add current LineVec to other ones in the output list */
keyLines.push_back(lineScaleLs);
}
}
/* compute LBD descriptors */
ComputeLBD_(keyLines);
}
/* power function with error management */
static inline int get2Pow(int i) {
if(i>=0 && i<=7)
return pow(2,i);
else
{
CV_Assert(false);
return -1;
}
}
/* conversion of an LBD descriptor to the decimal equivalent of its binary representation */
unsigned char BinaryDescriptor::binaryTest(float* f1, float* f2)
{
uchar result = 0;
for(int i = 0; i<8; i++)
{
if(f1[i]>f2[i])
result+=get2Pow(i);
}
return result;
}
/* compute LBD descriptors */
int BinaryDescriptor::ComputeLBD_(ScaleLines &keyLines)
{
//the default length of the band is the line length.
short numOfFinalLine = keyLines.size();
float *dL = new float[2];//line direction cos(dir), sin(dir)
float *dO = new float[2];//the clockwise orthogonal vector of line direction.
short heightOfLSP = params.widthOfBand_*params.numOfBand_;//the height of line support region;
short descriptorSize = params.numOfBand_ * 8;//each band, we compute the m( pgdL, ngdL, pgdO, ngdO) and std( pgdL, ngdL, pgdO, ngdO);
float pgdLRowSum;//the summation of {g_dL |g_dL>0 } for each row of the region;
float ngdLRowSum;//the summation of {g_dL |g_dL<0 } for each row of the region;
float pgdL2RowSum;//the summation of {g_dL^2 |g_dL>0 } for each row of the region;
float ngdL2RowSum;//the summation of {g_dL^2 |g_dL<0 } for each row of the region;
float pgdORowSum;//the summation of {g_dO |g_dO>0 } for each row of the region;
float ngdORowSum;//the summation of {g_dO |g_dO<0 } for each row of the region;
float pgdO2RowSum;//the summation of {g_dO^2 |g_dO>0 } for each row of the region;
float ngdO2RowSum;//the summation of {g_dO^2 |g_dO<0 } for each row of the region;
float *pgdLBandSum = new float[params.numOfBand_];//the summation of {g_dL |g_dL>0 } for each band of the region;
float *ngdLBandSum = new float[params.numOfBand_];//the summation of {g_dL |g_dL<0 } for each band of the region;
float *pgdL2BandSum = new float[params.numOfBand_];//the summation of {g_dL^2 |g_dL>0 } for each band of the region;
float *ngdL2BandSum = new float[params.numOfBand_];//the summation of {g_dL^2 |g_dL<0 } for each band of the region;
float *pgdOBandSum = new float[params.numOfBand_];//the summation of {g_dO |g_dO>0 } for each band of the region;
float *ngdOBandSum = new float[params.numOfBand_];//the summation of {g_dO |g_dO<0 } for each band of the region;
float *pgdO2BandSum = new float[params.numOfBand_];//the summation of {g_dO^2 |g_dO>0 } for each band of the region;
float *ngdO2BandSum = new float[params.numOfBand_];//the summation of {g_dO^2 |g_dO<0 } for each band of the region;
short numOfBitsBand = params.numOfBand_*sizeof(float);
short lengthOfLSP; //the length of line support region, varies with lines
short halfHeight = (heightOfLSP-1)/2;
short halfWidth;
short bandID;
float coefInGaussion;
float lineMiddlePointX, lineMiddlePointY;
float sCorX, sCorY,sCorX0, sCorY0;
short tempCor, xCor, yCor;//pixel coordinates in image plane
short dx, dy;
float gDL;//store the gradient projection of pixels in support region along dL vector
float gDO;//store the gradient projection of pixels in support region along dO vector
short imageWidth, imageHeight, realWidth;
short *pdxImg, *pdyImg;
float *desVec;
short sameLineSize;
short octaveCount;
OctaveSingleLine *pSingleLine;
/* loop over list of LineVec */
for(short lineIDInScaleVec = 0; lineIDInScaleVec<numOfFinalLine; lineIDInScaleVec++){
sameLineSize = keyLines[lineIDInScaleVec].size();
/* loop over current LineVec's lines */
for(short lineIDInSameLine = 0; lineIDInSameLine<sameLineSize; lineIDInSameLine++){
/* get a line in current LineVec and its original ID in its octave */
pSingleLine = &(keyLines[lineIDInScaleVec][lineIDInSameLine]);
octaveCount = pSingleLine->octaveCount;
/* retrieve associated dxImg and dyImg
pdxImg = edLineVec_[octaveCount]->dxImg_.ptr<short>();
pdyImg = edLineVec_[octaveCount]->dyImg_.ptr<short>(); */
pdxImg = dxImg_vector[octaveCount].ptr<short>();
pdyImg = dyImg_vector[octaveCount].ptr<short>();
/* get image size to work on from real one
realWidth = edLineVec_[octaveCount]->imageWidth;
imageWidth = realWidth -1;
imageHeight = edLineVec_[octaveCount]->imageHeight-1; */
realWidth = images_sizes[octaveCount].width;
imageWidth = realWidth - 1;
imageHeight = images_sizes[octaveCount].height - 1;
/* initialize memory areas */
memset(pgdLBandSum, 0, numOfBitsBand);
memset(ngdLBandSum, 0, numOfBitsBand);
memset(pgdL2BandSum, 0, numOfBitsBand);
memset(ngdL2BandSum, 0, numOfBitsBand);
memset(pgdOBandSum, 0, numOfBitsBand);
memset(ngdOBandSum, 0, numOfBitsBand);
memset(pgdO2BandSum, 0, numOfBitsBand);
memset(ngdO2BandSum, 0, numOfBitsBand);
/* get length of line and its half */
lengthOfLSP = keyLines[lineIDInScaleVec][lineIDInSameLine].numOfPixels;
halfWidth = (lengthOfLSP-1)/2;
/* get middlepoint of line */
lineMiddlePointX = 0.5 * (pSingleLine->sPointInOctaveX + pSingleLine->ePointInOctaveX);
lineMiddlePointY = 0.5 * (pSingleLine->sPointInOctaveY + pSingleLine->ePointInOctaveY);
/*1.rotate the local coordinate system to the line direction (direction is the angle
between positive line direction and positive X axis)
*2.compute the gradient projection of pixels in line support region*/
/* get the vector representing original image reference system after rotation to aligh with
line's direction */
dL[0] = cos(pSingleLine->direction);
dL[1] = sin(pSingleLine->direction);
/* set the clockwise orthogonal vector of line direction */
dO[0] = -dL[1];
dO[1] = dL[0];
/* get rotated reference frame */
sCorX0= -dL[0]*halfWidth + dL[1]*halfHeight + lineMiddlePointX;//hID =0; wID = 0;
sCorY0= -dL[1]*halfWidth - dL[0]*halfHeight + lineMiddlePointY;
/* BIAS::Matrix<float> gDLMat(heightOfLSP,lengthOfLSP) */
for(short hID = 0; hID <heightOfLSP; hID++){
/*initialization */
sCorX = sCorX0;
sCorY = sCorY0;
pgdLRowSum = 0;
ngdLRowSum = 0;
pgdORowSum = 0;
ngdORowSum = 0;
for(short wID = 0; wID <lengthOfLSP; wID++){
tempCor = round(sCorX);
xCor = (tempCor<0)?0:(tempCor>imageWidth)?imageWidth:tempCor;
tempCor = round(sCorY);
yCor = (tempCor<0)?0:(tempCor>imageHeight)?imageHeight:tempCor;
/* To achieve rotation invariance, each simple gradient is rotated aligned with
* the line direction and clockwise orthogonal direction.*/
dx = pdxImg[yCor*realWidth+xCor];
dy = pdyImg[yCor*realWidth+xCor];
gDL = dx * dL[0] + dy * dL[1];
gDO = dx * dO[0] + dy * dO[1];
if(gDL>0){
pgdLRowSum += gDL;
}else{
ngdLRowSum -= gDL;
}
if(gDO>0){
pgdORowSum += gDO;
}else{
ngdORowSum -= gDO;
}
sCorX +=dL[0];
sCorY +=dL[1];
/* gDLMat[hID][wID] = gDL; */
}
sCorX0 -=dL[1];
sCorY0 +=dL[0];
coefInGaussion = gaussCoefG_[hID];
pgdLRowSum = coefInGaussion * pgdLRowSum;
ngdLRowSum = coefInGaussion * ngdLRowSum;
pgdL2RowSum = pgdLRowSum * pgdLRowSum;
ngdL2RowSum = ngdLRowSum * ngdLRowSum;
pgdORowSum = coefInGaussion * pgdORowSum;
ngdORowSum = coefInGaussion * ngdORowSum;
pgdO2RowSum = pgdORowSum * pgdORowSum;
ngdO2RowSum = ngdORowSum * ngdORowSum;
/* compute {g_dL |g_dL>0 }, {g_dL |g_dL<0 },
{g_dO |g_dO>0 }, {g_dO |g_dO<0 } of each band in the line support region
first, current row belong to current band */
bandID = hID/params.widthOfBand_;
coefInGaussion = gaussCoefL_[hID%params.widthOfBand_+params.widthOfBand_];
pgdLBandSum[bandID] += coefInGaussion * pgdLRowSum;
ngdLBandSum[bandID] += coefInGaussion * ngdLRowSum;
pgdL2BandSum[bandID] += coefInGaussion * coefInGaussion * pgdL2RowSum;
ngdL2BandSum[bandID] += coefInGaussion * coefInGaussion * ngdL2RowSum;
pgdOBandSum[bandID] += coefInGaussion * pgdORowSum;
ngdOBandSum[bandID] += coefInGaussion * ngdORowSum;
pgdO2BandSum[bandID] += coefInGaussion * coefInGaussion * pgdO2RowSum;
ngdO2BandSum[bandID] += coefInGaussion * coefInGaussion * ngdO2RowSum;
/* In order to reduce boundary effect along the line gradient direction,
* a row's gradient will contribute not only to its current band, but also
* to its nearest upper and down band with gaussCoefL_.*/
bandID--;
if(bandID>=0){/* the band above the current band */
coefInGaussion = gaussCoefL_[hID%params.widthOfBand_ + 2*params.widthOfBand_];
pgdLBandSum[bandID] += coefInGaussion * pgdLRowSum;
ngdLBandSum[bandID] += coefInGaussion * ngdLRowSum;
pgdL2BandSum[bandID] += coefInGaussion * coefInGaussion * pgdL2RowSum;
ngdL2BandSum[bandID] += coefInGaussion * coefInGaussion * ngdL2RowSum;
pgdOBandSum[bandID] += coefInGaussion * pgdORowSum;
ngdOBandSum[bandID] += coefInGaussion * ngdORowSum;
pgdO2BandSum[bandID] += coefInGaussion * coefInGaussion * pgdO2RowSum;
ngdO2BandSum[bandID] += coefInGaussion * coefInGaussion * ngdO2RowSum;
}
bandID = bandID+2;
if(bandID<params.numOfBand_){/*the band below the current band */
coefInGaussion = gaussCoefL_[hID%params.widthOfBand_];
pgdLBandSum[bandID] += coefInGaussion * pgdLRowSum;
ngdLBandSum[bandID] += coefInGaussion * ngdLRowSum;
pgdL2BandSum[bandID] += coefInGaussion * coefInGaussion * pgdL2RowSum;
ngdL2BandSum[bandID] += coefInGaussion * coefInGaussion * ngdL2RowSum;
pgdOBandSum[bandID] += coefInGaussion * pgdORowSum;
ngdOBandSum[bandID] += coefInGaussion * ngdORowSum;
pgdO2BandSum[bandID] += coefInGaussion * coefInGaussion * pgdO2RowSum;
ngdO2BandSum[bandID] += coefInGaussion * coefInGaussion * ngdO2RowSum;
}
}
/* gDLMat.Save("gDLMat.txt");
return 0; */
/* construct line descriptor */
pSingleLine->descriptor.resize(descriptorSize);
desVec = pSingleLine->descriptor.data();
short desID;
/*Note that the first and last bands only have (lengthOfLSP * widthOfBand_ * 2.0) pixels
* which are counted. */
float invN2 = 1.0/(params.widthOfBand_ * 2.0);
float invN3 = 1.0/(params.widthOfBand_ * 3.0);
float invN, temp;
for(bandID = 0; bandID<params.numOfBand_; bandID++){
if(bandID==0||bandID==params.numOfBand_-1){ invN = invN2;
}else{ invN = invN3;}
desID = bandID * 8;
temp = pgdLBandSum[bandID] * invN;
desVec[desID] = temp;/* mean value of pgdL; */
desVec[desID+4] = sqrt(pgdL2BandSum[bandID] * invN - temp*temp);//std value of pgdL;
temp = ngdLBandSum[bandID] * invN;
desVec[desID+1] = temp;//mean value of ngdL;
desVec[desID+5] = sqrt(ngdL2BandSum[bandID] * invN - temp*temp);//std value of ngdL;
temp = pgdOBandSum[bandID] * invN;
desVec[desID+2] = temp;//mean value of pgdO;
desVec[desID+6] = sqrt(pgdO2BandSum[bandID] * invN - temp*temp);//std value of pgdO;
temp = ngdOBandSum[bandID] * invN;
desVec[desID+3] = temp;//mean value of ngdO;
desVec[desID+7] = sqrt(ngdO2BandSum[bandID] * invN - temp*temp);//std value of ngdO;
}
// normalize;
float tempM, tempS;
tempM = 0;
tempS = 0;
desVec = pSingleLine->descriptor.data();
int base = 0;
for(short i=0; i<params.numOfBand_*8; ++base, i=base*8){
tempM += *(desVec+i) * *(desVec+i);//desVec[8*i+0] * desVec[8*i+0];
tempM += *(desVec+i+1) * *(desVec+i+1);//desVec[8*i+1] * desVec[8*i+1];
tempM += *(desVec+i+2) * *(desVec+i+2);//desVec[8*i+2] * desVec[8*i+2];
tempM += *(desVec+i+3) * *(desVec+i+3);//desVec[8*i+3] * desVec[8*i+3];
tempS += *(desVec+i+4) * *(desVec+i+4);//desVec[8*i+4] * desVec[8*i+4];
tempS += *(desVec+i+5) * *(desVec+i+5);//desVec[8*i+5] * desVec[8*i+5];
tempS += *(desVec+i+6) * *(desVec+i+6);//desVec[8*i+6] * desVec[8*i+6];
tempS += *(desVec+i+7) * *(desVec+i+7);//desVec[8*i+7] * desVec[8*i+7];
}
tempM = 1/sqrt(tempM);
tempS = 1/sqrt(tempS);
desVec = pSingleLine->descriptor.data();
base = 0;
for(short i=0; i<params.numOfBand_*8; ++base, i=base*8){
*(desVec+i) = *(desVec+i) * tempM;//desVec[8*i] = desVec[8*i] * tempM;
*(desVec+1+i) = *(desVec+1+i) * tempM;//desVec[8*i+1] = desVec[8*i+1] * tempM;
*(desVec+2+i) = *(desVec+2+i) * tempM;//desVec[8*i+2] = desVec[8*i+2] * tempM;
*(desVec+3+i) = *(desVec+3+i) * tempM;//desVec[8*i+3] = desVec[8*i+3] * tempM;
*(desVec+4+i) = *(desVec+4+i) * tempS;//desVec[8*i+4] = desVec[8*i+4] * tempS;
*(desVec+5+i) = *(desVec+5+i) * tempS;//desVec[8*i+5] = desVec[8*i+5] * tempS;
*(desVec+6+i) = *(desVec+6+i) * tempS;//desVec[8*i+6] = desVec[8*i+6] * tempS;
*(desVec+7+i) = *(desVec+7+i) * tempS;//desVec[8*i+7] = desVec[8*i+7] * tempS;
}
/* In order to reduce the influence of non-linear illumination,
* a threshold is used to limit the value of element in the unit feature
* vector no larger than this threshold. In Z.Wang's work, a value of 0.4 is found
* empirically to be a proper threshold.*/
desVec = pSingleLine->descriptor.data();
for(short i=0; i<descriptorSize; i++ ){
if(desVec[i]>0.4){
desVec[i]=0.4;
}
}
//re-normalize desVec;
temp = 0;
for(short i=0; i<descriptorSize; i++){
temp += desVec[i] * desVec[i];
}
temp = 1/sqrt(temp);
for(short i=0; i<descriptorSize; i++){
desVec[i] = desVec[i] * temp;
}
}/* end for(short lineIDInSameLine = 0; lineIDInSameLine<sameLineSize;
lineIDInSameLine++) */
}/* end for(short lineIDInScaleVec = 0;
lineIDInScaleVec<numOfFinalLine; lineIDInScaleVec++) */
delete [] dL;
delete [] dO;
delete [] pgdLBandSum;
delete [] ngdLBandSum;
delete [] pgdL2BandSum;
delete [] ngdL2BandSum;
delete [] pgdOBandSum;
delete [] ngdOBandSum;
delete [] pgdO2BandSum;
delete [] ngdO2BandSum;
return 1;
}

14
modules/line_descriptor/src/line_descriptor_init.cpp
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@ -40,20 +40,20 @@
//M*/
#include "precomp.hpp"
#include "opencv2/line_detector.hpp"
//#include "opencv2/line_descriptor.hpp"
//class BinaryDescriptor;
namespace cv
{
CV_INIT_ALGORITHM(EDLineDetector, "EDLINEDETECTOR",);
CV_INIT_ALGORITHM(LineDescriptor, "LINEDESCRIPTOR",);
CV_INIT_ALGORITHM(BinaryDescriptor, "BINARY.DESCRIPTOR",);
bool initModule_tracking(void)
bool initModule_line_descriptor(void)
{
bool all = true;
all &= !EDLineDetector_info_auto.name().empty();
all &= !LineDescriptor_info_auto.name().empty();
all &= !BinaryDescriptor_info_auto.name().empty();
return all;
}

12
modules/line_descriptor/src/precomp.hpp
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@ -42,13 +42,17 @@
#ifndef __OPENCV_PRECOMP_H__
#define __OPENCV_PRECOMP_H__
#include "opencv2/line_descriptor/EDLineDetector.hpp"
#include "opencv2/line_descriptor/LineDescriptor.hpp"
#include "opencv2/line_descriptor/LineStructure.hpp"
#include <algorithm>
#include "opencv2/core/utility.hpp"
#include "opencv2/core/private.hpp"
#include <algorithm>
#include <opencv2/imgproc.hpp>
#include <opencv2/features2d.hpp>
#include <opencv2/highgui.hpp>
#include "opencv2/line_descriptor.hpp"
#endif

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