127 lines
7.0 KiB
C
127 lines
7.0 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016, Carnegie Mellon University and University of Cambridge,
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// all rights reserved.
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//
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// THIS SOFTWARE IS PROVIDED <20>AS IS<49> FOR ACADEMIC USE ONLY AND ANY EXPRESS
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// OR IMPLIED WARRANTIES WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
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// BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY.
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// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Notwithstanding the license granted herein, Licensee acknowledges that certain components
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// of the Software may be covered by so-called <20>open source<63> software licenses (<28>Open Source
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// Components<74>), which means any software licenses approved as open source licenses by the
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// Open Source Initiative or any substantially similar licenses, including without limitation any
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// license that, as a condition of distribution of the software licensed under such license,
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// requires that the distributor make the software available in source code format. Licensor shall
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// provide a list of Open Source Components for a particular version of the Software upon
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// Licensee<65>s request. Licensee will comply with the applicable terms of such licenses and to
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// the extent required by the licenses covering Open Source Components, the terms of such
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// licenses will apply in lieu of the terms of this Agreement. To the extent the terms of the
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// licenses applicable to Open Source Components prohibit any of the restrictions in this
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// License Agreement with respect to such Open Source Component, such restrictions will not
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// apply to such Open Source Component. To the extent the terms of the licenses applicable to
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// Open Source Components require Licensor to make an offer to provide source code or
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// related information in connection with the Software, such offer is hereby made. Any request
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// for source code or related information should be directed to cl-face-tracker-distribution@lists.cam.ac.uk
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// Licensee acknowledges receipt of notices for the Open Source Components for the initial
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// delivery of the Software.
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// * Any publications arising from the use of this software, including but
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// not limited to academic journal and conference publications, technical
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// reports and manuals, must cite at least one of the following works:
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//
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// OpenFace: an open source facial behavior analysis toolkit
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// Tadas Baltru<72>aitis, Peter Robinson, and Louis-Philippe Morency
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// in IEEE Winter Conference on Applications of Computer Vision, 2016
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//
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// Rendering of Eyes for Eye-Shape Registration and Gaze Estimation
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// Erroll Wood, Tadas Baltru<72>aitis, Xucong Zhang, Yusuke Sugano, Peter Robinson, and Andreas Bulling
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// in IEEE International. Conference on Computer Vision (ICCV), 2015
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//
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// Cross-dataset learning and person-speci?c normalisation for automatic Action Unit detection
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// Tadas Baltru<72>aitis, Marwa Mahmoud, and Peter Robinson
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// in Facial Expression Recognition and Analysis Challenge,
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// IEEE International Conference on Automatic Face and Gesture Recognition, 2015
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//
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// Constrained Local Neural Fields for robust facial landmark detection in the wild.
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// Tadas Baltru<72>aitis, Peter Robinson, and Louis-Philippe Morency.
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// in IEEE Int. Conference on Computer Vision Workshops, 300 Faces in-the-Wild Challenge, 2013.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef __PDM_h_
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#define __PDM_h_
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// OpenCV includes
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#include <opencv2/core/core.hpp>
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#include "LandmarkDetectorParameters.h"
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namespace LandmarkDetector
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{
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//===========================================================================
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// A linear 3D Point Distribution Model (constructed using Non-Rigid structure from motion or PCA)
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// Only describes the model but does not contain an instance of it (no local or global parameters are stored here)
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// Contains the utility functions to help manipulate the model
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class PDM{
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public:
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// The 3D mean shape vector of the PDM [x1,..,xn,y1,...yn,z1,...,zn]
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cv::Mat_<double> mean_shape;
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// Principal components or variation bases of the model,
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cv::Mat_<double> princ_comp;
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// Eigenvalues (variances) corresponding to the bases
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cv::Mat_<double> eigen_values;
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PDM(){;}
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// A copy constructor
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PDM(const PDM& other);
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void Read(string location);
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// Number of vertices
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inline int NumberOfPoints() const {return mean_shape.rows/3;}
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// Listing the number of modes of variation
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inline int NumberOfModes() const {return princ_comp.cols;}
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void Clamp(cv::Mat_<float>& params_local, cv::Vec6d& params_global, const FaceModelParameters& params);
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// Compute shape in object space (3D)
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void CalcShape3D(cv::Mat_<double>& out_shape, const cv::Mat_<double>& params_local) const;
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// Compute shape in image space (2D)
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void CalcShape2D(cv::Mat_<double>& out_shape, const cv::Mat_<double>& params_local, const cv::Vec6d& params_global) const;
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// provided the bounding box of a face and the local parameters (with optional rotation), generates the global parameters that can generate the face with the provided bounding box
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void CalcParams(cv::Vec6d& out_params_global, const cv::Rect_<double>& bounding_box, const cv::Mat_<double>& params_local, const cv::Vec3d rotation = cv::Vec3d(0.0));
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// Provided the landmark location compute global and local parameters best fitting it (can provide optional rotation for potentially better results)
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void CalcParams(cv::Vec6d& out_params_global, const cv::Mat_<double>& out_params_local, const cv::Mat_<double>& landmark_locations, const cv::Vec3d rotation = cv::Vec3d(0.0));
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// provided the model parameters, compute the bounding box of a face
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void CalcBoundingBox(cv::Rect& out_bounding_box, const cv::Vec6d& params_global, const cv::Mat_<double>& params_local);
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// Helpers for computing Jacobians, and Jacobians with the weight matrix
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void ComputeRigidJacobian(const cv::Mat_<float>& params_local, const cv::Vec6d& params_global, cv::Mat_<float> &Jacob, const cv::Mat_<float> W, cv::Mat_<float> &Jacob_t_w);
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void ComputeJacobian(const cv::Mat_<float>& params_local, const cv::Vec6d& params_global, cv::Mat_<float> &Jacobian, const cv::Mat_<float> W, cv::Mat_<float> &Jacob_t_w);
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// Given the current parameters, and the computed delta_p compute the updated parameters
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void UpdateModelParameters(const cv::Mat_<float>& delta_p, cv::Mat_<float>& params_local, cv::Vec6d& params_global);
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};
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//===========================================================================
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}
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#endif
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