OpenCVForUnity.FaceModule.Face Class Reference

Static Public Member Functions
static Facemark	createFacemarkAAM ()
static Facemark	createFacemarkLBF ()
static Facemark	createFacemarkKazemi ()
static bool	getFacesHAAR (Mat image, Mat faces, string face_cascade_name)
	Default face detector This function is mainly utilized by the implementation of a Facemark Algorithm. End users are advised to use function Facemark::getFaces which can be manually defined and circumvented to the algorithm by Facemark::setFaceDetector. More...
static bool	loadDatasetList (string imageList, string annotationList, List< string > images, List< string > annotations)
	A utility to load list of paths to training image and annotation file. More...
static bool	loadTrainingData (string filename, List< string > images, Mat facePoints, char delim, float offset)
	A utility to load facial landmark dataset from a single file. More...
static bool	loadTrainingData (string filename, List< string > images, Mat facePoints, char delim)
	A utility to load facial landmark dataset from a single file. More...
static bool	loadTrainingData (string filename, List< string > images, Mat facePoints)
	A utility to load facial landmark dataset from a single file. More...
static bool	loadTrainingData (string imageList, string groundTruth, List< string > images, Mat facePoints, float offset)
	A utility to load facial landmark information from the dataset. More...
static bool	loadTrainingData (string imageList, string groundTruth, List< string > images, Mat facePoints)
	A utility to load facial landmark information from the dataset. More...
static bool	loadTrainingData (List< string > filename, List< MatOfPoint2f > trainlandmarks, List< string > trainimages)
	This function extracts the data for training from .txt files which contains the corresponding image name and landmarks. The first file in each file should give the path of the image whose landmarks are being described in the file. Then in the subsequent lines there should be coordinates of the landmarks in the image i.e each line should be of the form x,y where x represents the x coordinate of the landmark and y represents the y coordinate of the landmark. More...
static bool	loadFacePoints (string filename, Mat points, float offset)
	A utility to load facial landmark information from a given file. More...
static bool	loadFacePoints (string filename, Mat points)
	A utility to load facial landmark information from a given file. More...
static void	drawFacemarks (Mat image, Mat points, Scalar color)
	Utility to draw the detected facial landmark points. More...
static void	drawFacemarks (Mat image, Mat points)
	Utility to draw the detected facial landmark points. More...

Member Function Documentation

createFacemarkAAM()

static Facemark OpenCVForUnity.FaceModule.Face.createFacemarkAAM ( )

static

createFacemarkKazemi()

static Facemark OpenCVForUnity.FaceModule.Face.createFacemarkKazemi ( )

static

createFacemarkLBF()

static Facemark OpenCVForUnity.FaceModule.Face.createFacemarkLBF ( )

static

drawFacemarks() [1/2]

static void OpenCVForUnity.FaceModule.Face.drawFacemarks ( Mat  image, Mat  points, Scalar  color  )

static

Utility to draw the detected facial landmark points.

Parameters

image	The input image to be processed.
points	Contains the data of points which will be drawn.
color	The color of points in BGR format represented by cv::Scalar.

<B>Example of usage</B>

std::vector<Rect> faces;
std::vector<std::vector<Point2f> > landmarks;
facemark->getFaces(img, faces);
facemark->fit(img, faces, landmarks);
for(int j=0;j<rects.size();j++){
    face::drawFacemarks(frame, landmarks[j], Scalar(0,0,255));
}

drawFacemarks() [2/2]

static void OpenCVForUnity.FaceModule.Face.drawFacemarks ( Mat  image, Mat  points  )

static

Utility to draw the detected facial landmark points.

Parameters

image	The input image to be processed.
points	Contains the data of points which will be drawn.
color	The color of points in BGR format represented by cv::Scalar.

<B>Example of usage</B>

std::vector<Rect> faces;
std::vector<std::vector<Point2f> > landmarks;
facemark->getFaces(img, faces);
facemark->fit(img, faces, landmarks);
for(int j=0;j<rects.size();j++){
    face::drawFacemarks(frame, landmarks[j], Scalar(0,0,255));
}

getFacesHAAR()

static bool OpenCVForUnity.FaceModule.Face.getFacesHAAR ( Mat  image, Mat  faces, string  face_cascade_name  )

static

Default face detector This function is mainly utilized by the implementation of a Facemark Algorithm. End users are advised to use function Facemark::getFaces which can be manually defined and circumvented to the algorithm by Facemark::setFaceDetector.

Parameters

image	The input image to be processed.
faces	Output of the function which represent region of interest of the detected faces. Each face is stored in cv::Rect container.
params	detector parameters

<B>Example of usage</B>

std::vector<cv::Rect> faces;
CParams params("haarcascade_frontalface_alt.xml");
cv::face::getFaces(frame, faces, &params);
for(int j=0;j<faces.size();j++){
    cv::rectangle(frame, faces[j], cv::Scalar(255,0,255));
}
cv::imshow("detection", frame);

loadDatasetList()

static bool OpenCVForUnity.FaceModule.Face.loadDatasetList ( string  imageList, string  annotationList, List< string >  images, List< string >  annotations  )

static

A utility to load list of paths to training image and annotation file.

Parameters

imageList	The specified file contains paths to the training images.
annotationList	The specified file contains paths to the training annotations.
images	The loaded paths of training images.
annotations	The loaded paths of annotation files.

Example of usage:

String imageFiles = "images_path.txt";
String ptsFiles = "annotations_path.txt";
std::vector<String> images_train;
std::vector<String> landmarks_train;
loadDatasetList(imageFiles,ptsFiles,images_train,landmarks_train);

loadFacePoints() [1/2]

static bool OpenCVForUnity.FaceModule.Face.loadFacePoints ( string  filename, Mat  points, float  offset  )

static

A utility to load facial landmark information from a given file.

Parameters

filename	The filename of file contains the facial landmarks data.
points	The loaded facial landmark points.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

std::vector<Point2f> points;
face::loadFacePoints("filename.txt", points, 0.0f);

The annotation file should follow the default format which is

version: 1
n_points:  68
{
212.716603 499.771793
230.232816 566.290071
...
}

where n_points is the number of points considered and each point is represented as its position in x and y.

loadFacePoints() [2/2]

static bool OpenCVForUnity.FaceModule.Face.loadFacePoints ( string  filename, Mat  points  )

static

A utility to load facial landmark information from a given file.

Parameters

filename	The filename of file contains the facial landmarks data.
points	The loaded facial landmark points.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

std::vector<Point2f> points;
face::loadFacePoints("filename.txt", points, 0.0f);

The annotation file should follow the default format which is

version: 1
n_points:  68
{
212.716603 499.771793
230.232816 566.290071
...
}

where n_points is the number of points considered and each point is represented as its position in x and y.

loadTrainingData() [1/6]

static bool OpenCVForUnity.FaceModule.Face.loadTrainingData ( string  filename, List< string >  images, Mat  facePoints, char  delim, float  offset  )

static

A utility to load facial landmark dataset from a single file.

Parameters

filename	The filename of a file that contains the dataset information. Each line contains the filename of an image followed by pairs of x and y values of facial landmarks points separated by a space. Example /home/user/ibug/image_003_1.jpg 336.820955 240.864510 334.238298 260.922709 335.266918 ... /home/user/ibug/image_005_1.jpg 376.158428 230.845712 376.736984 254.924635 383.265403 ...
images	A vector where each element represent the filename of image in the dataset. Images are not loaded by default to save the memory.
facePoints	The loaded landmark points for all training data.
delim	Delimiter between each element, the default value is a whitespace.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

cv::String imageFiles = "../data/images_train.txt";
cv::String ptsFiles = "../data/points_train.txt";
std::vector<String> images;
std::vector<std::vector<Point2f> > facePoints;
loadTrainingData(imageFiles, ptsFiles, images, facePoints, 0.0f);

loadTrainingData() [2/6]

static bool OpenCVForUnity.FaceModule.Face.loadTrainingData ( string  filename, List< string >  images, Mat  facePoints, char  delim  )

static

A utility to load facial landmark dataset from a single file.

Parameters

filename	The filename of a file that contains the dataset information. Each line contains the filename of an image followed by pairs of x and y values of facial landmarks points separated by a space. Example /home/user/ibug/image_003_1.jpg 336.820955 240.864510 334.238298 260.922709 335.266918 ... /home/user/ibug/image_005_1.jpg 376.158428 230.845712 376.736984 254.924635 383.265403 ...
images	A vector where each element represent the filename of image in the dataset. Images are not loaded by default to save the memory.
facePoints	The loaded landmark points for all training data.
delim	Delimiter between each element, the default value is a whitespace.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

cv::String imageFiles = "../data/images_train.txt";
cv::String ptsFiles = "../data/points_train.txt";
std::vector<String> images;
std::vector<std::vector<Point2f> > facePoints;
loadTrainingData(imageFiles, ptsFiles, images, facePoints, 0.0f);

loadTrainingData() [3/6]

static bool OpenCVForUnity.FaceModule.Face.loadTrainingData ( string  filename, List< string >  images, Mat  facePoints  )

static

A utility to load facial landmark dataset from a single file.

Parameters

filename	The filename of a file that contains the dataset information. Each line contains the filename of an image followed by pairs of x and y values of facial landmarks points separated by a space. Example /home/user/ibug/image_003_1.jpg 336.820955 240.864510 334.238298 260.922709 335.266918 ... /home/user/ibug/image_005_1.jpg 376.158428 230.845712 376.736984 254.924635 383.265403 ...
images	A vector where each element represent the filename of image in the dataset. Images are not loaded by default to save the memory.
facePoints	The loaded landmark points for all training data.
delim	Delimiter between each element, the default value is a whitespace.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

cv::String imageFiles = "../data/images_train.txt";
cv::String ptsFiles = "../data/points_train.txt";
std::vector<String> images;
std::vector<std::vector<Point2f> > facePoints;
loadTrainingData(imageFiles, ptsFiles, images, facePoints, 0.0f);

loadTrainingData() [4/6]

static bool OpenCVForUnity.FaceModule.Face.loadTrainingData ( string  imageList, string  groundTruth, List< string >  images, Mat  facePoints, float  offset  )

static

A utility to load facial landmark information from the dataset.

Parameters

imageList	A file contains the list of image filenames in the training dataset.
groundTruth	A file contains the list of filenames where the landmarks points information are stored. The content in each file should follow the standard format (see face::loadFacePoints).
images	A vector where each element represent the filename of image in the dataset. Images are not loaded by default to save the memory.
facePoints	The loaded landmark points for all training data.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

cv::String imageFiles = "../data/images_train.txt";
cv::String ptsFiles = "../data/points_train.txt";
std::vector<String> images;
std::vector<std::vector<Point2f> > facePoints;
loadTrainingData(imageFiles, ptsFiles, images, facePoints, 0.0f);

example of content in the images_train.txt

/home/user/ibug/image_003_1.jpg
/home/user/ibug/image_004_1.jpg
/home/user/ibug/image_005_1.jpg
/home/user/ibug/image_006.jpg

example of content in the points_train.txt

/home/user/ibug/image_003_1.pts
/home/user/ibug/image_004_1.pts
/home/user/ibug/image_005_1.pts
/home/user/ibug/image_006.pts

loadTrainingData() [5/6]

static bool OpenCVForUnity.FaceModule.Face.loadTrainingData ( string  imageList, string  groundTruth, List< string >  images, Mat  facePoints  )

static

A utility to load facial landmark information from the dataset.

Parameters

imageList	A file contains the list of image filenames in the training dataset.
groundTruth	A file contains the list of filenames where the landmarks points information are stored. The content in each file should follow the standard format (see face::loadFacePoints).
images	A vector where each element represent the filename of image in the dataset. Images are not loaded by default to save the memory.
facePoints	The loaded landmark points for all training data.
offset	An offset value to adjust the loaded points.

<B>Example of usage</B>

cv::String imageFiles = "../data/images_train.txt";
cv::String ptsFiles = "../data/points_train.txt";
std::vector<String> images;
std::vector<std::vector<Point2f> > facePoints;
loadTrainingData(imageFiles, ptsFiles, images, facePoints, 0.0f);

example of content in the images_train.txt

/home/user/ibug/image_003_1.jpg
/home/user/ibug/image_004_1.jpg
/home/user/ibug/image_005_1.jpg
/home/user/ibug/image_006.jpg

example of content in the points_train.txt

/home/user/ibug/image_003_1.pts
/home/user/ibug/image_004_1.pts
/home/user/ibug/image_005_1.pts
/home/user/ibug/image_006.pts

loadTrainingData() [6/6]

static bool OpenCVForUnity.FaceModule.Face.loadTrainingData ( List< string >  filename, List< MatOfPoint2f >  trainlandmarks, List< string >  trainimages  )

static

This function extracts the data for training from .txt files which contains the corresponding image name and landmarks. The first file in each file should give the path of the image whose landmarks are being described in the file. Then in the subsequent lines there should be coordinates of the landmarks in the image i.e each line should be of the form x,y where x represents the x coordinate of the landmark and y represents the y coordinate of the landmark.

For reference you can see the files as provided in the <a href="http://www.ifp.illinois.edu/~vuongle2/helen/">HELEN dataset</a>

Parameters

filename	A vector of type cv::String containing name of the .txt files.
trainlandmarks	A vector of type cv::Point2f that would store shape or landmarks of all images.
trainimages	A vector of type cv::String which stores the name of images whose landmarks are tracked

Returns

A boolean value. It returns true when it reads the data successfully and false otherwise

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The documentation for this class was generated from the following file:

• OpenCVForUnity/Assets/OpenCVForUnity/org/opencv_contrib/face/Face.cs