How to tracking eye


Suppose you are an advertiser. You are very dedicated to your product but you don’t really know the reaction of the users when they are watching it. Thus, We provided a solution to this problem through calculating the size and location of the pupil (?) with the error between actual value and calculated value is 10%.

The scientists  said that when someone is feeling positive, their pupils will increase its size and and vice versa. So by tracking the size and location of the pupils, we will know what the viewer focus in the screen and how interested they are.


We tackle this problem by following these steps:

  • First, we used a detector to recognize the position of the eye.
  • Second, we train a model to mark the points in the eye. These points will help us know the information of pupils, irises. Then we used these results this result to calculate the radius and position of the pupils.


  • This approach will be useful when we want to track the emotion of people.
  • Also, it can be use to do statistics information of eyes.


One Millisecond Face Alignment with an Ensemble of Regression Trees by Vahid Kazemi and Josephine Sullivan, CVPR 2014