Eye and Mouth detection from face using haar-cascades

Question

I have extracted eyes and mouth from the face, but want to extract emotions from eyes and mouth.. However, mouth is not detected properly.. This is my code..

Answer 1

i have divided face area in 2 rectangles top and bottom..and applied bottom rectangle to gray.ROI. and it works.. this is the code for both rectangles..

 int halfheight = facesnap.Height/2;
                    int start = facesnap.X;
                    int start1 = facesnap.Y;

                    Rectangle top = new Rectangle(start,start1,facesnap.Width,halfheight);
                    int start2 = top.Bottom;

                    Rectangle bottom = new Rectangle(start, start2, facesnap.Width, halfheight);
                    nextFrame.Draw(bottom, new Bgr(Color.Yellow), 2);
                    //Set the region of interest on the faces
                    gray.ROI = bottom;
                    MCvAvgComp[][] mouthsDetected = gray.DetectHaarCascade(mouth,
                                                    1.1, 10,
                                                  Emgu.CV.CvEnum.HAAR_DETECTION_TYPE.DO_CANNY_PRUNING,
                                                    new Size(20, 20));