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Commit 0f99fbb3 authored by Laurent Belcour's avatar Laurent Belcour
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Cleaning quadprog and matlab code to obtain the same thing

parent 3801ebe2
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Showing with 126 additions and 142 deletions
sources/core/function.cpp
View file @ 0f99fbb3
......@@ -48,10 +48,11 @@ vec function::getMax() const
void function::save(const std::string& filename, const arguments& args) const
{
bool is_cpp = args["export"] == "C++";
bool is_explorer = args["export"] == "explorer";
bool is_shader = args["export"] == "shader" || is_explorer;
bool is_matlab = args["export"] == "matlab";
bool is_alta = !args.is_defined("export") || args["export"] == "alta";
bool is_cpp = args["export"] == "C++";
bool is_explorer = args["export"] == "explorer";
bool is_shader = args["export"] == "shader" || is_explorer;
bool is_matlab = args["export"] == "matlab";
// Open the file
std::ofstream file(filename.c_str());
......@@ -60,60 +61,66 @@ void function::save(const std::string& filename, const arguments& args) const
std::cerr << "<<ERROR>> unable to open output file for writing" << std::endl;
}
if(is_explorer)
{
file << "analytic" << std::endl;
file << std::endl;
file << "::begin shader" << std::endl;
}
// If the export is the alta format, use the maximum precision formatting
if(is_alta)
{
file.precision(10);
}
if(is_explorer)
{
file << "analytic" << std::endl;
file << std::endl;
file << "::begin shader" << std::endl;
}
// Save common header
save_header(file, args);
save_header(file, args);
// Save function definition
save_body(file, args);
save_body(file, args);
if(is_cpp)
{
file << "vec brdf(const vec& in, const vec& file)" << std::endl;
file << "{" << std::endl;
file << "\tvec res(" << dimY() << ");" << std::endl;
file << "\t";
}
else if(is_matlab)
{
file << "function res = brdf(in, file)" << std::endl;
file << "{" << std::endl;
file << "\tres = zeros(" << dimY() << ");" << std::endl;
file << "\t";
}
else if(is_shader)
{
file << "vec3 BRDF(vec3 L, vec3 V, vec3 N, vec3 X, vec3 Y)" << std::endl;
file << "{" << std::endl;
file << "\tvec3 res = ";
}
if(is_cpp)
{
file << "vec brdf(const vec& in, const vec& file)" << std::endl;
file << "{" << std::endl;
file << "\tvec res(" << dimY() << ");" << std::endl;
file << "\t";
}
else if(is_matlab)
{
file << "function res = brdf(in, file)" << std::endl;
file << "{" << std::endl;
file << "\tres = zeros(" << dimY() << ");" << std::endl;
file << "\t";
}
else if(is_shader)
{
file << "vec3 BRDF(vec3 L, vec3 V, vec3 N, vec3 X, vec3 Y)" << std::endl;
file << "{" << std::endl;
file << "\tvec3 res = ";
}
// Save fit data
save_call(file, args);
if(is_cpp || is_shader)
{
file << ";" << std::endl;
file << "\treturn res;" << std::endl;
file << "}" << std::endl;
}
else if(is_matlab)
{
file << ";" << std::endl;
file << "\treturn res;" << std::endl;
file << "endfunction" << std::endl;
}
file << std::endl;
save_call(file, args);
if(is_cpp || is_shader)
{
file << ";" << std::endl;
file << "\treturn res;" << std::endl;
file << "}" << std::endl;
}
else if(is_matlab)
{
file << ";" << std::endl;
file << "\treturn res;" << std::endl;
file << "endfunction" << std::endl;
}
file << std::endl;
if(is_explorer)
{
file << "::end shader" << std::endl;
}
if(is_explorer)
{
file << "::end shader" << std::endl;
}
}
//! \brief save the header of the output function file. The header should
......@@ -128,9 +135,10 @@ void function::save_header(std::ostream& out, const arguments& args) const
out << "#DIM " << _nX << " " << _nY << std::endl;
out << "#PARAM_IN " << params::get_name(input_parametrization()) << std::endl;
//out << "#PARAM_OUT " << params::get_name(output_parametrization()) << std::endl;*
if(args.is_defined("export-append")) {
out << args["export-append"] << std::endl;
}
if(args.is_defined("export-append"))
{
out << args["export-append"] << std::endl;
}
out << "#ALTA HEADER END" << std::endl;
out << std::endl;
}
......
sources/core/plugins_manager.cpp
View file @ 0f99fbb3
......@@ -208,6 +208,9 @@ function* plugins_manager::get_function(const std::string& filename)
throw ;
}
// Set the precision of the input
file.precision(10);
// Parameters of the function object
int nX, nY;
arguments args;
......
sources/core/rational_function.cpp
View file @ 0f99fbb3
......@@ -35,7 +35,13 @@ void rational_function_1d::update(const vec& in_a,
a.resize(in_a.size()) ;
b.resize(in_b.size()) ;
const double b0 = 1.0;//in_b[0];
#define NORMALIZE
#ifdef NORMALIZE
const double b0 = (std::abs(in_b[0]) > 1.0E-10) ? in_b[0] : 1.0;
#else
const double b0 = 1.0;
#endif
for(int i=0; i<a.size(); ++i) { a[i] = in_a[i] / b0; }
for(int i=0; i<b.size(); ++i) { b[i] = in_b[i] / b0; }
......
sources/plugins/rational_fitter_matlab/rational_fitter.cpp
View file @ 0f99fbb3
......@@ -124,11 +124,7 @@ bool rational_fitter_matlab::fit_data(const vertical_segment* d, int np, int nq,
// Size of the problem
int N = np+nq ;
int M = d->size() ;
/*
// Get the maximum value in data to scale the input parameter space
// so that it reduces the values of the polynomial
vec dmax = d->max() ;
*/
// Matrices of the problem
Eigen::MatrixXd G (N, N) ;
Eigen::VectorXd g (N) ;
......@@ -171,26 +167,27 @@ bool rational_fitter_matlab::fit_data(const vertical_segment* d, int np, int nq,
if(j<np)
{
const double pi = r->p(xi, j) ;
a0_norm += pi*pi ;
a1_norm += pi*pi ;
// Updating Eigen matrix
CI(2*i+0, j) = pi ;
CI(2*i+1, j) = -pi ;
CI(2*i+0, j) = pi;
CI(2*i+1, j) = -pi;
}
// Filling the q part
else
{
vec yl, yu ;
d->get(i, yl, yu) ;
vec yl, yu;
d->get(i, yl, yu);
const double qi = r->q(xi, j-np) ;
a0_norm += qi*qi * (yu[ny]*yu[ny]) ;
a1_norm += qi*qi * (yl[ny]*yl[ny]) ;
const double qi = r->q(xi, j-np);
// Updating Eigen matrix
CI(2*i+0, j) = -yu[ny] * qi ;
CI(2*i+1, j) = yl[ny] * qi ;
CI(2*i+0, j) = -yu[ny] * qi;
CI(2*i+1, j) = yl[ny] * qi;
}
// Update the norm of the row
a0_norm += CI(2*i+0, j)*CI(2*i+0, j);
a1_norm += CI(2*i+1, j)*CI(2*i+1, j);
}
// Set the c vector, will later be updated using the
......
sources/plugins/rational_fitter_quadprog/rational_fitter.cpp
View file @ 0f99fbb3
......@@ -122,32 +122,25 @@ bool rational_fitter_quadprog::fit_data(const vertical_segment* d, int np, int n
// np and nq are the degree of the RP to fit to the data
// y is the dimension to fit on the y-data (e.g. R, G or B for RGB signals)
// the function return a ration BRDF function and a boolean
bool rational_fitter_quadprog::fit_data(const vertical_segment* dat, int np, int nq, int ny, rational_function_1d* r)
bool rational_fitter_quadprog::fit_data(const vertical_segment* d, int np, int nq, int ny, rational_function_1d* r)
{
const vertical_segment* d = dynamic_cast<const vertical_segment*>(dat) ;
if(r == NULL || d == NULL)
{
std::cerr << "<<ERROR>> not passing the correct class to the fitter" << std::endl ;
return false ;
}
// Get the maximum value in data to scale the input parameter space
// so that it reduces the values of the polynomial
vec dmax = d->max() ;
// Size of the problem
const int N = np+nq ;
const int M = d->size() ;
// Matrices of the problem
QuadProgPP::Matrix<double> G (0.0, np+nq, np+nq) ;
QuadProgPP::Vector<double> g (0.0, np+nq) ;
QuadProgPP::Matrix<double> CI(0.0, np+nq, 2*d->size()) ;
QuadProgPP::Vector<double> ci(0.0, 2*d->size()) ;
QuadProgPP::Matrix<double> CE(0.0, np+nq, 0) ;
QuadProgPP::Matrix<double> G (0.0, N, N) ;
QuadProgPP::Vector<double> g (0.0, N) ;
QuadProgPP::Matrix<double> CI(0.0, N, 2*M) ;
QuadProgPP::Vector<double> ci(0.0, 2*M) ;
QuadProgPP::Matrix<double> CE(0.0, N, 0) ;
QuadProgPP::Vector<double> ce(0.0, 0) ;
Eigen::MatrixXd eCI(np+nq, 2*d->size()) ;
Eigen::MatrixXd eCI(2*M, N) ;
// Select the size of the result vector to
// be equal to the dimension of p + q
for(int i=0; i<np+nq; ++i)
for(int i=0; i<N; ++i)
{
G[i][i] = 1.0 ;
}
......@@ -155,7 +148,7 @@ bool rational_fitter_quadprog::fit_data(const vertical_segment* dat, int np, int
// Each constraint (fitting interval or point
// add another dimension to the constraint
// matrix
for(int i=0; i<d->size(); ++i)
for(int i=0; i<M; ++i)
{
// Norm of the row vector
double a0_norm = 0.0 ;
......@@ -163,30 +156,23 @@ bool rational_fitter_quadprog::fit_data(const vertical_segment* dat, int np, int
vec xi = d->get(i) ;
bool is_boundary = false;
for(int k=0; k<d->dimX(); ++k)
{
is_boundary = is_boundary || (xi[k] <= d->min()[k]) || (xi[k] >= d->max()[k]);
}
// A row of the constraint matrix has this
// form: [p_{0}(x_i), .., p_{np}(x_i), -f(x_i) q_{0}(x_i), .., -f(x_i) q_{nq}(x_i)]
// For the lower constraint and negated for
// the upper constraint
for(int j=0; j<np+nq; ++j)
for(int j=0; j<N; ++j)
{
// Filling the p part
if(j<np)
{
const double pi = r->p(xi, j) ;
a0_norm += pi*pi ;
a1_norm += pi*pi ;
CI[j][i] = pi ;
CI[j][i+d->size()] = -pi ;
const double pi = r->p(xi, j);
CI[j][2*i+0] = pi;
CI[j][2*i+1] = -pi;
// Updating Eigen matrix
eCI(j,i) = pi ;
eCI(j,i+d->size()) = -pi ;
eCI(2*i+0, j) = CI[j][2*i+0];
eCI(2*i+1, j) = CI[j][2*i+1];
}
// Filling the q part
else
......@@ -194,67 +180,51 @@ bool rational_fitter_quadprog::fit_data(const vertical_segment* dat, int np, int
vec yl, yu ;
d->get(i, yl, yu) ;
// Add a constraints for boundary conditions
if(is_boundary)
{
vec mean = 0.5*(yl+yu);
yl = mean + _boundary * (yl - mean);
yu = mean + _boundary * (yu - mean);
}
const double qi = r->q(xi, j-np) ;
a0_norm += qi*qi * (yl[ny]*yl[ny]) ;
CI[j][i] = -yl[ny] * qi ;
a1_norm += qi*qi * (yu[ny]*yu[ny]) ;
CI[j][i+d->size()] = yu[ny] * qi ;
const double qi = r->q(xi, j-np);
CI[j][2*i+0] = -yu[ny] * qi;
CI[j][2*i+1] = yl[ny] * qi;
// Updating Eigen matrix
eCI(j,i) = -yl[ny] * qi ;
eCI(j,i+d->size()) = yu[ny] * qi ;
eCI(2*i+0, j) = CI[j][2*i+0];
eCI(2*i+1, j) = CI[j][2*i+1];
}
// Update the norm of the row
a0_norm += CI[j][2*i+0]*CI[j][2*i+0];
a1_norm += CI[j][2*i+1]*CI[j][2*i+1];
}
// Set the c vector, will later be updated using the
// delta parameter.
ci[i] = -sqrt(a0_norm) ;
ci[i+d->size()] = -sqrt(a1_norm) ;
ci[2*i+0] = -sqrt(a0_norm) ;
ci[2*i+1] = -sqrt(a1_norm) ;
}
#ifdef DEBUG
std::cout << "CI = [" ;
for(int j=0; j<d->size()*2; ++j)
for(int j=0; j<2*M; ++j)
{
for(int i=0; i<np+nq; ++i)
for(int i=0; i<N; ++i)
{
std::cout << CI[i][j] ;
if(i != np+nq-1) std::cout << ", ";
if(i != N-1) std::cout << ", ";
}
if(j != d->size()*2-1)
if(j != 2*M-1)
std::cout << ";" << std::endl;
else
std::cout << "]" << std::endl ;
}
#endif
/*
QTime time ;
time.start() ;
*/
// Update the ci column with the delta parameter
// (See Celis et al. 2007 p.12)
Eigen::JacobiSVD<Eigen::MatrixXd, Eigen::HouseholderQRPreconditioner> svd(eCI);
const double sigma_m = svd.singularValues()(std::min(2*d->size(), np+nq)-1) ;
const double sigma_m = svd.singularValues()(std::min(2*M, N)-1) ;
const double sigma_M = svd.singularValues()(0) ;
/*
int msec = time.elapsed() ;
int sec = (msec / 1000) % 60 ;
int min = (msec / 60000) % 60 ;
int hour = (msec / 3600000) ;
std::cout << "<<INFO>> delta took " << hour << "h " << min << "m " << sec << "s" << std::endl ;
*/
#ifdef DEBUG
std::cout << "<<DEBUG>> SVD = [ " ;
for(int i=0; i<std::min(2*d->size(), np+nq); ++i)
for(int i=0; i<std::min(2*M, N); ++i)
{
std::cout << svd.singularValues()(i) << ", " ;
}
......@@ -270,16 +240,16 @@ bool rational_fitter_quadprog::fit_data(const vertical_segment* dat, int np, int
#endif
return false ;
}
else if(delta <= 0.0)
else if(delta <= 0.0)
{
delta = 1.0 ;
}
#ifdef DEBUG
#ifndef DEBUG
std::cout << "<<DEBUG>> delta factor: " << sigma_m << " / " << sigma_M << " = " << delta << std::endl ;
#endif
for(int i=0; i<2*d->size(); ++i)
for(int i=0; i<2*M; ++i)
{
ci[i] = ci[i] * delta ;
#ifdef DEBUG
......@@ -308,7 +278,7 @@ bool rational_fitter_quadprog::fit_data(const vertical_segment* dat, int np, int
// Recopy the vector d
vec p(np), q(nq);
double norm = 0.0 ;
for(int i=0; i<np+nq; ++i)
for(int i=0; i<N; ++i)
{
const double v = x[i];
norm += v*v ;
......
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