Feature/opencv4 (#706)

* Travis OpenCV4 update, testing Ubuntu with new OpenCV

* Fix to Ubuntu travis

* Another attempt at OpenCV 4.0 for Ubuntu

* And another OpenCV attempt.

* Simplifying the travis script

* Ubuntu OpenCV 4 support.

* Updating to OpenCV 4, for x64 windows.

* Fixes to move to OpenCV 4 on windows.

* Travis fix for OpenCV 4 on OSX

* Renaming a lib.

* Travis opencv4 fix.

* Building OpenCV4 versions using appveyor.

* Attempt mac travis fix.

* Small travis fix.

* Travis fix attempt.

* First iteration in boost removal and upgrade to C++17

* Test with ocv 4.0

* Moving filesystem out of stdafx

* Some more boost testing with cmake.

* More CMAKE options

* More compiler flag changes

* Another attempt at compiler options.

* Another attempt.

* More filesystem stuff.

* Linking to filesystem.

* Cmake fix with target linking.

* Attempting travis with g++-8

* Attempting to setup g++8 on travis linux.

* Another travis change.

* Adding OpenBLAS to travis and removing g++-8

* Fixing typo

* More travis experiments.

* More travis debugging.

* A small directory change.

* Adding some more travis changes.

* travis typo fix.

* Some reordering of travis, for cleaner yml

* Removing `using namespace std` in order to avoid clash with byte and to make the code more consistent.

* Working towards removing std::filesystem requirement, allow boost::filesystem as well.

* Making boost an optional dependency

* Fixing std issue.

* Fixing cmake issue.

* Fixing the precompiled header issue.

* Another cmake boost fix.

* Including missing files.

* Removing unnecessary includes.

* Removing more includes.

* Changes to appveyor build, proper removal of VS2015

* If boost is present, do not need to link to filesystem.

* Removing un-needed link library.

* oops

* Mac attempt at opencv4 travis.

* Upgrading OCV to 4.1 on VS2018

* Downloading OpenCV binaries through a script

* Triger an appveyor build.

* Upgrading VS version.

* Attempting VS2017 build

* Adding win-32 libraries for OpenCV 4.1

* Adding OpenCV 32 bit libraries.

lib/local/FaceAnalyser/include/FaceAnalyserParameters.h

@@ -36,14 +36,7 @@
 #ifndef FACE_ANALYSER_PARAM_H
 #define FACE_ANALYSER_PARAM_H
 
-#include <vector>
-#include <opencv2/core/core.hpp>
-
-// Boost includes
-#include <filesystem.hpp>
-#include <filesystem/fstream.hpp>
-
-using namespace std;
+#include <stdafx_fa.h>
 
 namespace FaceAnalysis
 {
@@ -53,8 +46,8 @@ struct FaceAnalyserParameters
 public:
 	// Constructors
 	FaceAnalyserParameters();
-	FaceAnalyserParameters(string root_exe);
-	FaceAnalyserParameters(vector<string> &arguments);
+	FaceAnalyserParameters(std::string root_exe);
+	FaceAnalyserParameters(std::vector<std::string> &arguments);
 
 	// These are the parameters of training and will not change and are fixed
 	const double sim_scale_au = 0.7;
@@ -73,8 +66,8 @@ public:
 	double getSimScaleOut() const { return sim_scale_out; }
 	int getSimSizeOut() const { return sim_size_out; }
 	bool getDynamic() const { return dynamic; }
-	string getModelLoc() const { return string(model_location); }
-	vector<cv::Vec3d> getOrientationBins() const { return vector<cv::Vec3d>(orientation_bins); }
+	std::string getModelLoc() const { return std::string(model_location); }
+	std::vector<cv::Vec3d> getOrientationBins() const { return std::vector<cv::Vec3d>(orientation_bins); }
 
 private:
 
@@ -91,11 +84,11 @@ private:
 	bool dynamic;
 
 	// Where to load the models from
-	string model_location;
+	std::string model_location;
 	// The location of the executable
-	boost::filesystem::path root;
+	fs::path root;
 
-	vector<cv::Vec3d> orientation_bins;
+	std::vector<cv::Vec3d> orientation_bins;
 
 };
 

lib/local/FaceAnalyser/include/stdafx_fa.h

@@ -0,0 +1,57 @@
+///////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2017, Carnegie Mellon University and University of Cambridge,
+// 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
+//
+
+// Precompiled headers stuff
+
+#ifndef __STDAFX_FA_h_
+#define __STDAFX_FA_h_
+
+// OpenCV includes
+#include <opencv2/core/core.hpp>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/objdetect.hpp>
+#include <opencv2/calib3d.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/highgui/highgui.hpp>
+
+// dlib dependencies for face detection
+#include <dlib/image_processing/frontal_face_detector.h>
+#include <dlib/opencv.h>
+
+// C++ standard stuff
+#include <stdio.h>
+
+#include <fstream>
+#include <iostream>
+#include <sstream>
+
+#include <vector>
+#include <map>
+
+#define _USE_MATH_DEFINES
+#include <cmath>
+
+// Filesystem stuff
+// It can either be in std filesystem (C++17), or in experimental/filesystem (partial C++17 support) or in boost
+#if __has_include(<filesystem>)
+#include <filesystem>
+namespace fs = std::filesystem;
+#elif __has_include(<experimental/filesystem>)
+#include <experimental/filesystem>
+namespace fs = std::filesystem;
+#else
+#include <boost/filesystem.hpp>
+#include <boost/filesystem/fstream.hpp>
+namespace fs = boost::filesystem;
+#endif
+
+#endif