Appeal No. 1998-0618
Application 08/288,194
regions of said input test image with dictionary images IDn
which are produced from images obtained by taking images of
reference faces belonging to L categories from predetermined M
directions, where L is an integer equal to one or greater, M
is an integer equal to two or greater and is so selected that
an angle between two adjacent directions from which images of
said references faces are taken is equal to or greater than
10E and no greater than 40E, and n=1, 2, ..., N, and N=LXM,
said method comprising the steps of:
(a) updating a matching position (X, Y) of said
input test image and outputting said updated matching position
(X, Y);
(b) cutting out, as a matching region image, an
image of a region of a predetermined size on the basis of said
matching position (X, Y) in said input test image;
(c) computing a degree of similarity r(n) between
said matching region image and an n-th dictionary image;
(d) repeating the computation of said degree of
similarity r(n) with said matching position (X, Y) and said n
varied thereby obtaining the degree of similarity r(n) between
said matching region image and each of respective dictionary
images of said L categories and M directions;
(e) detecting said face region in said test image by
obtaining the matching position where said degree of
similarity obtained by said step (d) becomes the maximum as a
face position (Xmax, Ymax); and
(f) comparing said degree of similarity r(n) with a
predetermined threshold value to determine, based on the
comparison, whether or not the face image in said test image
belongs to at least one of said categories;
wherein each said dictionary image is generated as a
series of dictionary block image information consisting of q
3-3-
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