68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/*
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* CalibratedCamera.cpp
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*
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* Created on: Aug 17, 2009
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* Author: dellaert
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*/
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#include <gtsam/geometry/Point2.h>
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#include <gtsam/geometry/CalibratedCamera.h>
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namespace gtsam {
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CalibratedCamera::CalibratedCamera(const Pose3& pose) :
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pose_(pose) {
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}
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CalibratedCamera::CalibratedCamera(const Vector &v) : pose_(expmap<Pose3>(v)) {}
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CalibratedCamera::~CalibratedCamera() {}
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Point2 CalibratedCamera::project_to_camera(const Point3& P, boost::optional<Matrix&> H1) {
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if (H1) {
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double d = 1.0 / P.z(), d2 = d * d;
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*H1 = Matrix_(2, 3, d, 0.0, -P.x() * d2, 0.0, d, -P.y() * d2);
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}
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return Point2(P.x() / P.z(), P.y() / P.z());
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}
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Point3 CalibratedCamera::backproject_from_camera(const Point2& p, const double scale) {
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return Point3(p.x() * scale, p.y() * scale, scale);
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}
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CalibratedCamera CalibratedCamera::level(const Pose2& pose2, double height) {
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double st = sin(pose2.theta()), ct = cos(pose2.theta());
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Point3 x(st, -ct, 0), y(0, 0, -1), z(ct, st, 0);
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Rot3 wRc(x, y, z);
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Point3 t(pose2.x(), pose2.y(), height);
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Pose3 pose3(wRc, t);
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return CalibratedCamera(pose3);
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}
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Point2 CalibratedCamera::project(const Point3& point,
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boost::optional<Matrix&> D_intrinsic_pose,
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boost::optional<Matrix&> D_intrinsic_point) const {
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const Pose3& pose = pose_;
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const Rot3& R = pose.rotation();
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const Point3& r1 = R.r1(), r2 = R.r2(), r3 = R.r3();
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Point3 q = pose.transform_to(point);
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if (D_intrinsic_pose || D_intrinsic_point) {
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double X = q.x(), Y = q.y(), Z = q.z();
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double d = 1.0 / Z, d2 = d * d, Xd2 = X*d2, Yd2 = Y*d2;
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double dp11 = d*r1.x()-r3.x()*Xd2, dp12 = d*r1.y()-r3.y()*Xd2, dp13 = d*r1.z()-r3.z()*Xd2;
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double dp21 = d*r2.x()-r3.x()*Yd2, dp22 = d*r2.y()-r3.y()*Yd2, dp23 = d*r2.z()-r3.z()*Yd2;
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if (D_intrinsic_pose)
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*D_intrinsic_pose = Matrix_(2,6,
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X*Yd2, -Z*d-X*Xd2, d*Y, -dp11, -dp12, -dp13,
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d*Z+Y*Yd2, -X*Yd2, -d*X, -dp21, -dp22, -dp23);
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if (D_intrinsic_point)
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*D_intrinsic_point = Matrix_(2,3,
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dp11, dp12, dp13,
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dp21, dp22, dp23);
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}
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return project_to_camera(q);
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}
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/* ************************************************************************* */
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}
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