25 October 1988 Method Of Detecting Face Direction Using Image Processing For Human Interface
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Proceedings Volume 1001, Visual Communications and Image Processing '88: Third in a Series; (1988) https://doi.org/10.1117/12.969006
Event: Visual Communications and Image Processing III, 1988, Cambridge, MA, United States
Abstract
A method of non-contact detection of human face direction using a TV image and its application to pointing operation are presented. First, an algorithm for detecting the direction of a human face is described. In this method, the human face is defined as a plane having three feature points. Here, 2-D coordinates of these points projected on a TV image, together with the distances between points measured on the face are used to obtain the 3-D positions of the feature points. The normal vector of the plane, same as face direction, can be calculated from those values of the 3-D positions. Next, the accuracy of this algorithm is evaluated by experiment. Three blue marks are pasted on the human face as the feature points. These marks are extracted from the TV image by the chroma key method and the face direction is calculated by the above algorithm. This result is compared with the direction obtained from a high accuracy 3-D magnetic sensor attached to the subject's head. For real time detection, a fast method of finding the marks on a TV image is described. A window is set around each mark and the search process is applied within this window. The position of the window follows the marks' movement. Finally, to determine if the processing speed is in real time, a pointing operation that uses face direction detected by this method is tested with a menu selection task. Results of these experiments show that 3-D face direction can he detected in real time, and that this method is effective in human-interfaces such as menu selection.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kazunori Ohmura, Kazunori Ohmura, Akira Tomono, Akira Tomono, Yukio Kobayashi, Yukio Kobayashi, } "Method Of Detecting Face Direction Using Image Processing For Human Interface", Proc. SPIE 1001, Visual Communications and Image Processing '88: Third in a Series, (25 October 1988); doi: 10.1117/12.969006; https://doi.org/10.1117/12.969006
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