Method and apparatus for processing images of facial expressions
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United States of America Patent
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Nov 18, 1997
Grant Date -
N/A
app pub date -
Nov 21, 1994
filing date -
Nov 22, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A real time output containing data relating to states of facial parts is generated. A facial area detection unit (11) has monitoring (51-57) and determining (59-61) processing circuits operating in a pipelining manner to determine position of the facial area. The monitoring circuits (51-57) monitor pixel value frequency using 3D histogram and backprojection processing. The generating facial area signal has masks applied by a unit (12) which supplies data to mouth area and eye area detection units (14,15). Each of these operate on similar principles to the facial area detection unit (11).
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