Face location detection

摘要

The location of a face is detected from data about a scene. A 3D surface model from is obtained from measurements of the scene. A 2D angle data image is generated from the 3D surface model. The angle data image is generated for a virtual lighting direction, the image representing angles between a ray directions from a virtual light source direction and normal to the 3D surface. A 2D face location algorithm is applied to each of the respective 2D images. In an embodiment respective 2D angle data images for a plurality of virtual lighting directions are generated and face locations detected from the respective 2D images are fused.

主权项

1. An image processing method wherein a location of a face is detected, the method comprising
obtaining a 3D surface model from measurements of a scene; generating a 2D image of angle data from the 3D surface model, the 2D image representing angle data, the angle data for each respective image point in the 2D image being selected dependent on an angle between an incidence direction derived from a virtual lighting direction and a normal to the 3D surface at a point on the 3D surface that is in view in the 2D image at the image point; applying a 2D face location algorithm to the 2D image generating a plurality of respective 2D images from the 3D surface model, each representing the angle data for a respective virtual lighting direction; applying the 2D face location algorithm to each of the respective 2D images; combining face locations detected from the respective 2D images.