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Removed selective linearization mess - it was non-functional anyway, we can aleays re-add it if needed.

release/4.3a0
dellaert 2015-03-10 15:24:00 -07:00
parent 37f0c45716
commit 9991240ae7
2 changed files with 36 additions and 168 deletions
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150
gtsam/slam/SmartProjectionFactor.h
View File

@ -31,21 +31,6 @@
namespace gtsam {
/**
* Structure for storing some state memory, used to speed up optimization
* @addtogroup SLAM
*/
struct SmartProjectionFactorState {
// Hessian representation (after Schur complement)
bool calculatedHessian;
Matrix H;
Vector gs_vector;
std::vector<Matrix> Gs;
std::vector<Vector> gs;
double f;
};
/**
* SmartProjectionFactor: triangulates point and keeps an estimate of it around.
*/
@ -83,16 +68,6 @@ protected:
const bool verboseCheirality_; ///< If true, prints text for Cheirality exceptions (default: false)
/// @}
/// @name Caching linearization
/// @{
/// shorthand for smart projection factor state variable
typedef boost::shared_ptr<SmartProjectionFactorState> SmartFactorStatePtr;
SmartFactorStatePtr state_; ///< cached linearization
const double linearizationThreshold_; ///< threshold to decide whether to re-linearize
mutable std::vector<Pose3> cameraPosesLinearization_; ///< current linearization poses
/// @}
public:
/// shorthand for a smart pointer to a factor
@ -110,17 +85,14 @@ public:
* @param enableEPI if set to true linear triangulation is refined with embedded LM iterations
*/
SmartProjectionFactor(LinearizationMode linearizationMode = HESSIAN,
double rankTolerance = 1, double linThreshold = -1,
bool manageDegeneracy = false, bool enableEPI = false,
double landmarkDistanceThreshold = 1e10,
double dynamicOutlierRejectionThreshold = -1, SmartFactorStatePtr state =
SmartFactorStatePtr(new SmartProjectionFactorState())) :
double rankTolerance = 1, bool manageDegeneracy = false, bool enableEPI =
false, double landmarkDistanceThreshold = 1e10,
double dynamicOutlierRejectionThreshold = -1) :
linearizeTo_(linearizationMode), parameters_(rankTolerance, enableEPI,
landmarkDistanceThreshold, dynamicOutlierRejectionThreshold), //
result_(TriangulationResult::Degenerate()), //
retriangulationThreshold_(1e-5), manageDegeneracy_(manageDegeneracy), //
throwCheirality_(false), verboseCheirality_(false), //
state_(state), linearizationThreshold_(linThreshold) {
throwCheirality_(false), verboseCheirality_(false) {
}
/** Virtual destructor */
@ -183,39 +155,6 @@ public:
return retriangulate; // if we arrive to this point all poses are the same and we don't need re-triangulation
}
/// This function checks if the new linearization point is 'close' to the previous one used for linearization
bool decideIfLinearize(const Cameras& cameras) const {
// "selective linearization"
// The function evaluates how close are the old and the new poses, transformed in the ref frame of the first pose
// (we only care about the "rigidity" of the poses, not about their absolute pose)
if (linearizationThreshold_ < 0) //by convention if linearizationThreshold is negative we always relinearize
return true;
// if we do not have a previous linearization point or the new linearization point includes more poses
if (cameraPosesLinearization_.empty()
|| (cameras.size() != cameraPosesLinearization_.size()))
return true;
Pose3 firstCameraPose, firstCameraPoseOld;
for (size_t i = 0; i < cameras.size(); i++) {
if (i == 0) { // we store the initial pose, this is useful for selective re-linearization
firstCameraPose = cameras[i].pose();
firstCameraPoseOld = cameraPosesLinearization_[i];
continue;
}
// we compare the poses in the frame of the first pose
Pose3 localCameraPose = firstCameraPose.between(cameras[i].pose());
Pose3 localCameraPoseOld = firstCameraPoseOld.between(
cameraPosesLinearization_[i]);
if (!localCameraPose.equals(localCameraPoseOld, linearizationThreshold_))
return true; // at least two "relative" poses are different, hence we re-linearize
}
return false; // if we arrive to this point all poses are the same and we don't need re-linearize
}
/// triangulateSafe
TriangulationResult triangulateSafe(const Cameras& cameras) const {
@ -237,7 +176,8 @@ public:
/// linearize returns a Hessianfactor that is an approximation of error(p)
boost::shared_ptr<RegularHessianFactor<Base::Dim> > createHessianFactor(
const Cameras& cameras, const double lambda = 0.0) const {
const Cameras& cameras, const double lambda = 0.0, bool diagonalDamping =
false) const {
size_t numKeys = this->keys_.size();
// Create structures for Hessian Factors
@ -264,77 +204,18 @@ public:
Gs, gs, 0.0);
}
// decide whether to re-linearize
bool doLinearize = this->decideIfLinearize(cameras);
if (linearizationThreshold_ >= 0 && doLinearize) // if we apply selective relinearization and we need to relinearize
for (size_t i = 0; i < cameras.size(); i++)
this->cameraPosesLinearization_[i] = cameras[i].pose();
if (!doLinearize) { // return the previous Hessian factor
std::cout << "=============================" << std::endl;
std::cout << "doLinearize " << doLinearize << std::endl;
std::cout << "linearizationThreshold_ " << linearizationThreshold_
<< std::endl;
std::cout << "valid: " << isValid() << std::endl;
std::cout
<< "something wrong in SmartProjectionHessianFactor: selective relinearization should be disabled"
<< std::endl;
exit(1);
return boost::make_shared<RegularHessianFactor<Base::Dim> >(this->keys_,
this->state_->Gs, this->state_->gs, this->state_->f);
}
// ==================================================================
Matrix F, E;
Vector b;
{
std::vector<typename Base::MatrixZD> Fblocks;
Matrix E;
Vector b;
computeJacobiansWithTriangulatedPoint(Fblocks, E, b, cameras);
Base::whitenJacobians(Fblocks, E, b);
Base::FillDiagonalF(Fblocks, F); // expensive !
}
double f = b.squaredNorm();
Matrix P = Base::PointCov(E, lambda, diagonalDamping);
// Schur complement trick
// Frank says: should be possible to do this more efficiently?
// And we care, as in grouped factors this is called repeatedly
Matrix H(Base::Dim * numKeys, Base::Dim * numKeys);
Vector gs_vector;
// build augmented hessian
SymmetricBlockMatrix augmentedHessian = CameraSet<CAMERA>::SchurComplement(
Fblocks, E, P, b);
// Note P can 2*2 or 3*3
Matrix P = Base::PointCov(E, lambda);
// Create reduced Hessian matrix via Schur complement F'*F - F'*E*P*E'*F
H.noalias() = F.transpose() * (F - (E * (P * (E.transpose() * F))));
// Create reduced gradient - (F'*b - F'*E*P*E'*b)
// Note the minus sign above! g has negative b.
// Informal reasoning: when we write the error as 0.5*|Ax-b|^2
// the derivative is A'*(Ax-b), and at x=0, this becomes -A'*b
gs_vector.noalias() = -F.transpose()
* (b - (E * (P * (E.transpose() * b))));
// Populate Gs and gs
int GsCount2 = 0;
for (DenseIndex i1 = 0; i1 < (DenseIndex) numKeys; i1++) { // for each camera
DenseIndex i1D = i1 * Base::Dim;
gs.at(i1) = gs_vector.segment<Base::Dim>(i1D);
for (DenseIndex i2 = 0; i2 < (DenseIndex) numKeys; i2++) {
if (i2 >= i1) {
Gs.at(GsCount2) = H.block<Base::Dim, Base::Dim>(i1D, i2 * Base::Dim);
GsCount2++;
}
}
}
// ==================================================================
if (linearizationThreshold_ >= 0) { // if we do not use selective relinearization we don't need to store these variables
this->state_->Gs = Gs;
this->state_->gs = gs;
this->state_->f = f;
}
return boost::make_shared<RegularHessianFactor<Base::Dim> >(this->keys_, Gs,
gs, f);
return boost::make_shared<RegularHessianFactor<Base::Dim> >(this->keys_,
augmentedHessian);
}
// create factor
@ -562,7 +443,8 @@ private:
ar & BOOST_SERIALIZATION_NVP(throwCheirality_);
ar & BOOST_SERIALIZATION_NVP(verboseCheirality_);
}
};
}
;
/// traits
template<class CAMERA>

50
gtsam/slam/tests/testSmartProjectionPoseFactor.cpp
View File

@ -31,7 +31,6 @@
using namespace boost::assign;
static const double rankTol = 1.0;
static const double linThreshold = -1.0;
static const bool manageDegeneracy = true;
// Create a noise model for the pixel error
@ -62,7 +61,7 @@ TEST( SmartProjectionPoseFactor, Constructor) {
/* ************************************************************************* */
TEST( SmartProjectionPoseFactor, Constructor2) {
using namespace vanillaPose;
SmartFactor factor1(SmartFactor::HESSIAN, rankTol, linThreshold);
SmartFactor factor1(SmartFactor::HESSIAN, rankTol);
}
/* ************************************************************************* */
@ -75,7 +74,7 @@ TEST( SmartProjectionPoseFactor, Constructor3) {
/* ************************************************************************* */
TEST( SmartProjectionPoseFactor, Constructor4) {
using namespace vanillaPose;
SmartFactor factor1(SmartFactor::HESSIAN, rankTol, linThreshold);
SmartFactor factor1(SmartFactor::HESSIAN, rankTol);
factor1.add(measurement1, x1, model);
}
@ -248,7 +247,6 @@ TEST( SmartProjectionPoseFactor, 3poses_smart_projection_factor ) {
Point3(0.1, -0.1, 1.9)), values.at<Camera>(x3).pose()));
Values result;
params.verbosityLM = LevenbergMarquardtParams::SUMMARY;
LevenbergMarquardtOptimizer optimizer(graph, values, params);
result = optimizer.optimize();
@ -458,7 +456,6 @@ TEST( SmartProjectionPoseFactor, 3poses_iterative_smart_projection_factor ) {
values.at<Camera>(x3).pose()));
Values result;
params.verbosityLM = LevenbergMarquardtParams::SUMMARY;
LevenbergMarquardtOptimizer optimizer(graph, values, params);
result = optimizer.optimize();
@ -513,7 +510,6 @@ TEST( SmartProjectionPoseFactor, jacobianSVD ) {
values.insert(x3, Camera(pose_above * noise_pose, sharedK));
Values result;
params.verbosityLM = LevenbergMarquardtParams::SUMMARY;
LevenbergMarquardtOptimizer optimizer(graph, values, params);
result = optimizer.optimize();
EXPECT(assert_equal(pose_above, result.at<Camera>(x3).pose(), 1e-8));
@ -604,22 +600,22 @@ TEST( SmartProjectionPoseFactor, dynamicOutlierRejection ) {
measurements_cam4.at(0) = measurements_cam4.at(0) + Point2(10, 10); // add outlier
SmartFactor::shared_ptr smartFactor1(
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, -1, false, false,
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, false, false,
excludeLandmarksFutherThanDist, dynamicOutlierRejectionThreshold));
smartFactor1->add(measurements_cam1, views, model);
SmartFactor::shared_ptr smartFactor2(
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, -1, false, false,
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, false, false,
excludeLandmarksFutherThanDist, dynamicOutlierRejectionThreshold));
smartFactor2->add(measurements_cam2, views, model);
SmartFactor::shared_ptr smartFactor3(
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, -1, false, false,
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, false, false,
excludeLandmarksFutherThanDist, dynamicOutlierRejectionThreshold));
smartFactor3->add(measurements_cam3, views, model);
SmartFactor::shared_ptr smartFactor4(
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, -1, false, false,
new SmartFactor(SmartFactor::JACOBIAN_SVD, 1, false, false,
excludeLandmarksFutherThanDist, dynamicOutlierRejectionThreshold));
smartFactor4->add(measurements_cam4, views, model);
@ -663,15 +659,15 @@ TEST( SmartProjectionPoseFactor, jacobianQ ) {
projectToMultipleCameras(cam1, cam2, cam3, landmark3, measurements_cam3);
SmartFactor::shared_ptr smartFactor1(
new SmartFactor(SmartFactor::JACOBIAN_Q, 1, -1, false, false));
new SmartFactor(SmartFactor::JACOBIAN_Q, 1, false, false));
smartFactor1->add(measurements_cam1, views, model);
SmartFactor::shared_ptr smartFactor2(
new SmartFactor(SmartFactor::JACOBIAN_Q, 1, -1, false, false));
new SmartFactor(SmartFactor::JACOBIAN_Q, 1, false, false));
smartFactor2->add(measurements_cam2, views, model);
SmartFactor::shared_ptr smartFactor3(
new SmartFactor(SmartFactor::JACOBIAN_Q, 1, -1, false, false));
new SmartFactor(SmartFactor::JACOBIAN_Q, 1, false, false));
smartFactor3->add(measurements_cam3, views, model);
const SharedDiagonal noisePrior = noiseModel::Isotropic::Sigma(6, 0.10);
@ -749,7 +745,6 @@ TEST( SmartProjectionPoseFactor, 3poses_projection_factor ) {
DOUBLES_EQUAL(48406055, graph.error(values), 1);
cout << "SUCCEEDS : ==============================================" << endl;
params.verbosityLM = LevenbergMarquardtParams::SUMMARY;
LevenbergMarquardtOptimizer optimizer(graph, values, params);
Values result = optimizer.optimize();
cout << "=========================================================" << endl;
@ -869,13 +864,11 @@ TEST( SmartProjectionPoseFactor, 3poses_2land_rotation_only_smart_projection_fac
double rankTol = 50;
SmartFactor::shared_ptr smartFactor1(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor1->add(measurements_cam1, views, model);
SmartFactor::shared_ptr smartFactor2(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor2->add(measurements_cam2, views, model);
const SharedDiagonal noisePrior = noiseModel::Isotropic::Sigma(6, 0.10);
@ -950,18 +943,15 @@ TEST( SmartProjectionPoseFactor, 3poses_rotation_only_smart_projection_factor )
double rankTol = 10;
SmartFactor::shared_ptr smartFactor1(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor1->add(measurements_cam1, views, model);
SmartFactor::shared_ptr smartFactor2(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor2->add(measurements_cam2, views, model);
SmartFactor::shared_ptr smartFactor3(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor3->add(measurements_cam3, views, model);
const SharedDiagonal noisePrior = noiseModel::Isotropic::Sigma(6, 0.10);
@ -1159,7 +1149,7 @@ TEST( SmartProjectionPoseFactor, HessianWithRotationDegenerate ) {
/* ************************************************************************* */
TEST( SmartProjectionPoseFactor, ConstructorWithCal3Bundler) {
using namespace bundlerPose;
SmartFactor factor(SmartFactor::HESSIAN, rankTol, linThreshold);
SmartFactor factor(SmartFactor::HESSIAN, rankTol);
factor.add(measurement1, x1, model);
}
@ -1218,7 +1208,6 @@ TEST( SmartProjectionPoseFactor, Cal3Bundler ) {
Point3(0.1, -0.1, 1.9)), values.at<Camera>(x3).pose()));
Values result;
params.verbosityLM = LevenbergMarquardtParams::SUMMARY;
LevenbergMarquardtOptimizer optimizer(graph, values, params);
result = optimizer.optimize();
@ -1255,18 +1244,15 @@ TEST( SmartProjectionPoseFactor, Cal3BundlerRotationOnly ) {
double rankTol = 10;
SmartFactor::shared_ptr smartFactor1(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor1->add(measurements_cam1, views, model);
SmartFactor::shared_ptr smartFactor2(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor2->add(measurements_cam2, views, model);
SmartFactor::shared_ptr smartFactor3(
new SmartFactor(SmartFactor::HESSIAN, rankTol, linThreshold,
manageDegeneracy));
new SmartFactor(SmartFactor::HESSIAN, rankTol, manageDegeneracy));
smartFactor3->add(measurements_cam3, views, model);
const SharedDiagonal noisePrior = noiseModel::Isotropic::Sigma(6, 0.10);