Automated marker placement and triangle approach

We proposed a mathematical model for placing eight virtual markers on a defined location in the subject’s face [49]. Descriptions of the computer-generated marker placement algorithm for emotional facial expressions can be found in [49]. After the marker placement, each marker’s edges are used to formulate five triangles for facial emotional expression detection. We have investigated a maximum of 42 different triangles by heuristic approach, and finally, five triangles are selected based on higher emotional expression rate. Fig 3 shows the face detection, automated marker placement and proposed triangle method. Table 2 describes the correspondent triangle formulated through facial features (markers) and Fig 4 shows the geometrical model of marker placement. Here, p_e1 refers to the first marker in the left eye, p_e2 refers to the second marker in the right eye, p_e3 refers to the second marker in the left eye, p_e4 refers to the first marker in the right eye, C center marker, p_m1 refers to the marker in the left side of the mouth, p_m2 refers to the marker in the right side of the mouth, p_m3 refers to the marker in the top of the mouth, and p_m4 refers to the marker at the bottom of the mouth.

Note: The content above has been extracted from a research article, so it may not display correctly.



Q&A
Please log in to submit your questions online.
Your question will be posted on the Bio-101 website. We will send your questions to the authors of this protocol and Bio-protocol community members who are experienced with this method. you will be informed using the email address associated with your Bio-protocol account.



We use cookies on this site to enhance your user experience. By using our website, you are agreeing to allow the storage of cookies on your computer.