sustaining_gazes/lib/local/Utilities/include/SequenceCapture.h

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///////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017, Tadas Baltrusaitis all rights reserved.
//
// ACADEMIC OR NON-PROFIT ORGANIZATION NONCOMMERCIAL RESEARCH USE ONLY
//
// BY USING OR DOWNLOADING THE SOFTWARE, YOU ARE AGREEING TO THE TERMS OF THIS LICENSE AGREEMENT.
// IF YOU DO NOT AGREE WITH THESE TERMS, YOU MAY NOT USE OR DOWNLOAD THE SOFTWARE.
//
// License can be found in OpenFace-license.txt
//
// * Any publications arising from the use of this software, including but
// not limited to academic journal and conference publications, technical
// reports and manuals, must cite at least one of the following works:
//
// OpenFace: an open source facial behavior analysis toolkit
// Tadas Baltru<72>aitis, Peter Robinson, and Louis-Philippe Morency
// in IEEE Winter Conference on Applications of Computer Vision, 2016
//
// Rendering of Eyes for Eye-Shape Registration and Gaze Estimation
// Erroll Wood, Tadas Baltru<72>aitis, Xucong Zhang, Yusuke Sugano, Peter Robinson, and Andreas Bulling
// in IEEE International. Conference on Computer Vision (ICCV), 2015
//
// Cross-dataset learning and person-speci?c normalisation for automatic Action Unit detection
// Tadas Baltru<72>aitis, Marwa Mahmoud, and Peter Robinson
// in Facial Expression Recognition and Analysis Challenge,
// IEEE International Conference on Automatic Face and Gesture Recognition, 2015
//
// Constrained Local Neural Fields for robust facial landmark detection in the wild.
// Tadas Baltru<72>aitis, Peter Robinson, and Louis-Philippe Morency.
// in IEEE Int. Conference on Computer Vision Workshops, 300 Faces in-the-Wild Challenge, 2013.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef __SEQUENCE_CAPTURE_h_
#define __SEQUENCE_CAPTURE_h_
// System includes
#include <fstream>
#include <sstream>
#include <vector>
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// OpenCV includes
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
namespace Utilities
{
//===========================================================================
/**
A class for capturing sequences from video, webcam, and image directories
*/
class SequenceCapture {
public:
// Default constructor
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SequenceCapture() {};
// TODO block copy, move etc.
// Opening based on command line arguments
bool Open(std::vector<std::string>& arguments);
// Direct opening
// Webcam
bool OpenWebcam(int device_id, int image_width = 640, int image_height = 480, float fx = -1, float fy = -1, float cx = -1, float cy = -1);
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// Image sequence in the directory
bool OpenImageSequence(std::string directory, float fx = -1, float fy = -1, float cx = -1, float cy = -1);
// Video file
bool OpenVideoFile(std::string video_file, float fx = -1, float fy = -1, float cx = -1, float cy = -1);
bool IsWebcam() { return is_webcam; }
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// Getting the next frame
cv::Mat GetNextFrame();
// Getting the most recent grayscale frame (need to call GetNextFrame first)
cv::Mat_<uchar> GetGrayFrame();
// Parameters describing the sequence and it's progress
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double GetProgress();
bool IsOpened();
int frame_width;
int frame_height;
float fx, fy, cx, cy;
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double fps;
double time_stamp;
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// Name of the video file, image directory, or the webcam
std::string name;
// Allows to differentiate if failed because no input specified or if failed to open a specified input
bool no_input_specified;
private:
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// Used for capturing webcam and video
cv::VideoCapture capture;
// Storing the latest captures
cv::Mat latest_frame;
cv::Mat latest_gray_frame;
// Keeping track of frame number and the files in the image sequence
size_t frame_num;
std::vector<std::string> image_files;
// Length of video allowing to assess progress
size_t vid_length;
// If using a webcam, helps to keep track of time
int64 start_time;
// Keeping track if we are opening a video, webcam or image sequence
bool is_webcam;
bool is_image_seq;
void SetCameraIntrinsics(float fx, float fy, float cx, float cy);
};
}
#endif