//Function to cross all informations added to this face and evaluate the best values
public void Evaluate()
{
//Evaluate mouth
evaluatedMouth = new Rect(0, 0, 0, 0);
//Random randomizer = new Random();
//evaluatedMouth = mouths[randomizer.Next(0, mouths.Count - 1)];
//must work a few on the mouth to choose the best one and proceed to histogram check for try to determinate skin color, eye color, hair color etc..
foreach (Rect mouth in mouths)
{
if (mouth.y < face.y + face.height / 2)
continue;
if (evaluatedMouth.width > mouth.width)
continue;
evaluatedMouth = mouth;
}
//Evaluate eyes
evaluatedEyes = new ArrayList<Rect>();
ArrayList<Rect> rightCandidates = new ArrayList<Rect>();
ArrayList<Rect> leftCandidates = new ArrayList<Rect>();
foreach (Rect eye in eyes)
{
//Ensure the eyes are in the upper half of the img region
if (eye.y + eye.height / 2 > face.y + face.height / 2)
continue;
if (eye.x + eye.width / 2 < face.x + face.width / 2)
rightCandidates.add(eye);
else
leftCandidates.add(eye);
}
//get centers for each side weighted by their areas
int totalAreas = 0;
int totalX = 0;
int totalY = 0;
if (rightCandidates.size() > 0)
{
foreach (Rect eye in rightCandidates)
{
int eyeArea = eye.width * eye.height;
totalAreas += eyeArea;
totalX += (eye.x + eye.width / 2) * eyeArea;
totalY += (eye.y + eye.height / 2) * eyeArea;
}
Point rightPoint = new Point(totalX / totalAreas, totalY / totalAreas);
int rightEyeSide = (int)Math.Sqrt((double)totalAreas / (double)rightCandidates.size());
Rect rightEye = new Rect(
rightPoint.x - rightEyeSide / 2,
rightPoint.y - rightEyeSide / 2,
rightEyeSide,
rightEyeSide);
//rightEye.Offset(-rightEye.Width / 2, -rightEye.Height / 2);
evaluatedEyes.add(rightEye);
}
if (leftCandidates.size() > 0)
{
totalAreas = 0;
totalX = 0;
totalY = 0;
foreach (Rect eye in leftCandidates)
{
int eyeArea = eye.width * eye.height;
totalAreas += eyeArea;
totalX += (eye.x + eye.width / 2) * eyeArea;
totalY += (eye.y + eye.height / 2) * eyeArea;
}
Point leftPoint = new Point(totalX / totalAreas, totalY / totalAreas);
int leftEyeSide = (int)Math.Sqrt((double)totalAreas / (double)leftCandidates.size());
Rect leftEye = new Rect(
leftPoint.x - leftEyeSide / 2,
leftPoint.y - leftEyeSide / 2,
leftEyeSide,
leftEyeSide);
//leftEye.Offset(-leftEye.Width / 2, -leftEye.Height / 2);
evaluatedEyes.add(leftEye);
}
//Check if it is valid
isValid = false;
if (evaluatedEyes.size() > 2)
throw new Exception("Eyes count must be equal or less than two");
if (evaluatedEyes.size() == 2)
{
isValid = true;
//Get the face line data
Point eye1Center = new Point(evaluatedEyes.get(0).x + evaluatedEyes.get(0).width / 2,
evaluatedEyes.get(0).y + evaluatedEyes.get(0).height / 2);
Point eye2Center = new Point(evaluatedEyes.get(1).x + evaluatedEyes.get(1).width / 2,
evaluatedEyes.get(1).y + evaluatedEyes.get(1).height / 2);
int xOffset = (eye2Center.x - eye1Center.x) / 2;
int yOffset = (eye2Center.y - eye1Center.y) / 2;
Point eyeLineCenter = new Point(eye1Center.x + xOffset, eye1Center.y + yOffset);
int zeroDivFac = eye1Center.x == eye2Center.x ? 1 : 0;
//Generate face line slope and offset
double aFact = (double)(eye1Center.y - eye2Center.y) /
(double)(eye1Center.x - eye2Center.x + zeroDivFac);
aFact = Math.Atan(aFact) + Math.PI / 2;
aFact = Math.Tan(aFact);
double bFact = eyeLineCenter.y - aFact * eyeLineCenter.x;
faceLineSlope = aFact;
faceLineOffset = bFact;
//If the mouth is invalid, project a new based on the face line
if (evaluatedMouth.width == 0)
{
PointGenerator faceLinePoint = new PointGenerator(aFact, bFact);
Point projMouthPos = faceLinePoint.GetFromY(face.y + face.height * 0.8);
evaluatedMouth = new Rect(
projMouthPos.x - (face.width / 3) / 2,
projMouthPos.y - (face.height / 5) / 2,
face.width / 3,
face.height / 5);
//evaluatedMouth.Offset(-evaluatedMouth.Width / 2, -evaluatedMouth.Height / 2);
}
}
if (evaluatedEyes.size() == 1 && evaluatedMouth.width > 0)
{
isValid = true;
//Project the other eye based on the mouth
//Get the bottom mouth coords
Point mouthBottomCenter = new Point(
evaluatedMouth.x + evaluatedMouth.width / 2,
evaluatedMouth.y + evaluatedMouth.height);
//get the facetop coords
Point faceTopCenter = new Point(face.width / 2 +
face.x, face.y);
//Apply an experimental correct factor to the values
int correctFact = mouthBottomCenter.x - faceTopCenter.x;
//correctFact = (int)(correctFact * 0.5);
mouthBottomCenter.x += correctFact;
faceTopCenter.x -= correctFact;
//Get the slope of the faceline
//In case they are the same value, add a pixel to prevent division by 0
int zeroDivFac = mouthBottomCenter.x == faceTopCenter.x ? 1 : 0;
double a = (double)(mouthBottomCenter.y - faceTopCenter.y) /
(double)(mouthBottomCenter.x - faceTopCenter.x + zeroDivFac);
//Get the offset of the face line
double b = mouthBottomCenter.y - a * mouthBottomCenter.x;
faceLineSlope = a;
faceLineOffset = b;
//Get the line function of the face
PointGenerator faceLinePoint = new PointGenerator(a, b);
//Get the reference of the existing eye and its center point
Rect eyeRef = evaluatedEyes.get(0);
Point eyeCenter = new Point(eyeRef.x + eyeRef.width / 2, eyeRef.y + eyeRef.height / 2);
//Get the slope of the eye line (it must be normal to the face line, so we turn it Pi/2
double aEyeFact = Math.Atan(a) + Math.PI / 2;
aEyeFact = Math.Tan(aEyeFact);
//Get the eye line offset
double bEyeFact = eyeCenter.y - aEyeFact * eyeCenter.x;
//Get the line function of the eye
PointGenerator eyeLinePoint = new PointGenerator(aEyeFact, bEyeFact);
//Get the horizontal difference between the center of the existing eye and the face line
int diff = faceLinePoint.GetFromY(eyeCenter.y).x - eyeCenter.x;
//Get the project eye coords
Point projEyePoint = eyeLinePoint.GetFromX(eyeCenter.x + diff * 2);
//Get the project eye rectangle
Rect projEyeRect = new Rect(
projEyePoint.x - eyeRef.width / 2,
projEyePoint.y - eyeRef.height / 2,
eyeRef.width,
eyeRef.height);
//projEyeRect.Offset(-eyeRef.Width / 2, -eyeRef.Height / 2);
evaluatedEyes.add(projEyeRect);
}
//If the face keep invalid, put the face line on the middle of the face square
if (!isValid)
{
faceLineSlope = -face.height / 0.01;
faceLineOffset = face.y - faceLineSlope * face.x + face.width / 2;
}
}
void drawFaceFeatures(PersonFace personFace, Mat illustratedImg)
{
Rect faceRect = personFace.GetFace();
Rect mouthRect = personFace.GetMouth();
Rect noseRect = personFace.GetNose();
Rect[] eyesRects = personFace.GetEyes();
//Draw face division line
double[] faceLineData = personFace.GetFaceLineData();
PointGenerator faceLine = new PointGenerator(faceLineData[0], faceLineData[1]);
Point faceTopPoint = faceLine.GetFromY(faceRect.y);
Point faceBottomPoint = faceLine.GetFromY(faceRect.y + faceRect.height);
//Imgproc.line(illustratedImg, faceTopPoint, faceBottomPoint, new Scalar(255, 0, 0), 1);
//Get face feature angle
double faceFeatureAngle = Math.Atan(faceLineData[0]);
faceFeatureAngle = RadianToDegree(faceFeatureAngle);
faceFeatureAngle += faceFeatureAngle > 0 ? -90 : 90;
//Draw face lateral boundaries lines
//Detect right and left eye
Rect rightEye, leftEye;
if (eyesRects[0].x > eyesRects[1].x)
{
rightEye = eyesRects[1];
leftEye = eyesRects[0];
}
else
{
rightEye = eyesRects[0];
leftEye = eyesRects[1];
}
//get eye line generator
PointGenerator eyeLines = new PointGenerator(
getRectCenter(rightEye), getRectCenter(leftEye));
Point leftFacePoint = eyeLines.GetFromX(getRectCenter(leftEye).x + leftEye.width);
Point rightFacePoint = eyeLines.GetFromX(getRectCenter(rightEye).x - rightEye.width);
/* CvInvoke.Circle(image, leftFacePoint, 20,
new Bgr(Color.Green).MCvScalar, -1);
CvInvoke.Circle(image, rightFacePoint, 20,
new Bgr(Color.Blue).MCvScalar, -1);*/
//Get line generators for each side of the face
double faceLineSlope = faceLineData[0];
//Left side
double leftFaceSideOffset = leftFacePoint.y - leftFacePoint.x * faceLineSlope;
PointGenerator leftFaceLine = new PointGenerator(faceLineSlope, leftFaceSideOffset);
Point startPointL = leftFaceLine.GetFromY(0);
Point endPointL = leftFaceLine.GetFromY(illustratedImg.Height);
//Right side
double rightFaceSideOffset = rightFacePoint.y - rightFacePoint.x * faceLineSlope;
PointGenerator rightFaceLine = new PointGenerator(faceLineSlope, rightFaceSideOffset);
Point startPointR = rightFaceLine.GetFromY(0);
Point endPointR = rightFaceLine.GetFromY(illustratedImg.Height);
//Imgproc.line(illustratedImg, startPointL, endPointL, new Scalar(0,255,0), 5);
//Imgproc.line(illustratedImg, startPointR, endPointR,new Scalar(255,0,0), 3);
//Draw mouth line
//Put center on the top for the mouth stay in the middle of the mouth square
Point mouthCenter = new Point(mouthRect.x + mouthRect.width / 2, mouthRect.y);
Size mouthSize = new Size(mouthRect.width / 2, mouthRect.height / 2);
Point mCenter = getRectCenter(mouthRect);
//Get mouth line generator
double aFactMouth = Math.Tan(Math.Atan(faceLineSlope) + Math.PI / 2);
double bfactMouth = mCenter.y - mCenter.x * aFactMouth;
PointGenerator mouthLine = new PointGenerator(aFactMouth, bfactMouth);
double leftFaceMouthCrossX = (bfactMouth - leftFaceSideOffset) /
(faceLineSlope - aFactMouth);
double rightFaceMouthCrossX = (bfactMouth - rightFaceSideOffset) /
(faceLineSlope - aFactMouth);
Point leftFaceMouthCross = mouthLine.GetFromX(leftFaceMouthCrossX);
Point rightFaceMouthCross = mouthLine.GetFromX(rightFaceMouthCrossX);
//Get face top line
double afactTopFace = aFactMouth; //use the mouth line since this uses the same slope
double bfactTopFace = faceTopPoint.y - faceTopPoint.x * afactTopFace;
PointGenerator faceTopLine = new PointGenerator(afactTopFace, bfactTopFace);
double leftTopFaceCrossX = (bfactTopFace - leftFaceSideOffset) /
(faceLineSlope - afactTopFace);
double rightTopFaceCrossX = (bfactTopFace - rightFaceSideOffset) /
(faceLineSlope - afactTopFace);
Point leftTopFaceCross = faceTopLine.GetFromX(leftTopFaceCrossX);
Point rightTopFaceCross = faceTopLine.GetFromX(rightTopFaceCrossX);
/*CvInvoke.Circle(illustratedImg, leftTopFaceCross, 5, new MCvScalar(), -1);
CvInvoke.Circle(illustratedImg, rightTopFaceCross, 5, new MCvScalar(), -1);
CvInvoke.Circle(illustratedImg, leftFaceMouthCross, 5, new MCvScalar(), -1);
CvInvoke.Circle(illustratedImg, rightFaceMouthCross, 5, new MCvScalar(), -1);
CvInvoke.Circle(illustratedImg, faceBottomPoint, 5, new MCvScalar(), -1);*/
MatOfPoint facePointsMat = new MatOfPoint(leftTopFaceCross,
rightTopFaceCross,
rightFaceMouthCross,
faceBottomPoint,
leftFaceMouthCross);
//CvInvoke.Polylines(image, facePointsVector, true, new Bgr(172, 203, 227).MCvScalar, 1);
Imgproc.fillConvexPoly(illustratedImg, facePointsMat, new Scalar(255,255,255));
Imgproc.ellipse(illustratedImg, mouthCenter, mouthSize, faceFeatureAngle, 0, 180, new Scalar(0,0,0), 2);
Point p1 = faceTopLine.GetFromX(0);
Point p2 = faceTopLine.GetFromX(illustratedImg.Width);
//Imgproc.line(illustratedImg, p1, p2, new Scalar(0, 0, 0), 3);
//Draw nose line
Point noseCenter = new Point(noseRect.x + noseRect.width / 2,
noseRect.y + noseRect.height / 2);
Size noseSize = new Size(noseRect.width / 2, noseRect.height / 2);
double noseAngle = Math.Atan(faceLineData[0]);
noseAngle = RadianToDegree(noseAngle);
Imgproc.ellipse(illustratedImg, noseCenter, noseSize, noseAngle, 0, 180, new Scalar(0, 0, 0), 2);
//Draw eyes ellipses
foreach (Rect eye in personFace.GetEyes())
{
Point eyeCenter = new Point(eye.x + eye.width / 2, eye.y + eye.height / 2);
Size ellipseSize = new Size(eye.width / 5, eye.height / 2);
Imgproc.ellipse(illustratedImg, eyeCenter, ellipseSize, faceFeatureAngle, 0, 360, new Scalar(0, 0, 0), -1);
}
Imgproc.line(illustratedImg, faceBottomPoint, new Point(illustratedImg.width() / 2, illustratedImg.height()), new Scalar(0, 0, 0));
}