Head Pose Estimation

1
Head Pose Estimation

• Goal To estimate orientation of the head

• Motivation The importance of this problem
• Intelligent Spaces Scene Interpretation
• Focus of attention in the room
• Groups of people
• Robots
• Interaction with humans

2
Related Research

• Other Methods
• Model-based
• Facial Feature Tracking
• Template-based
• Method Chosen Ellipse Fitting
• Factors taken into account
• Simplicity
• Real-time
• Skin segmentation
• Ellipse fitting around binary mask

3
Basic Approach

• Initialization
• K-means clustering
• Take HSV values from face cluster, set thresholds

• imhist(S)?

4
Basic Approach (Cont)?

• Skin Segmentation
• Ellipse Fitting
• Angle of Ellipse

5
Results

• With k-means initialization, works under various
  lighting conditions
• From testing, can reliably determine up to 5
  orientations from left to right

6
Discussion of Results

• Good
• Can work under various conditions
• Real-time

• Bad
• Can fail in complex background
• Only works on left-right
• Doesn't work on bald people
• Single face tracking

7
Future Work

• Determine head pose in more directions
• Multiple head tracking
• Accuracy

8
Misc

• Milestones, Hurdles
• K-means clustering
• Determining thresholds
• Matlab GUIs