US 7,321,370 B2 | ||
Method and apparatus for collating object | ||
Rui Ishiyama, Tokyo (Japan) | ||
Assigned to NEC Corporation, Tokyo (Japan) | ||
Filed on Nov. 13, 2001, as Appl. No. 10/14,075. | ||
Claims priority of application No. 2000-353402 (JP), filed on Nov. 20, 2000. | ||
Prior Publication US 2002/0097906 A1, Jul. 25, 2002 | ||
Int. Cl. G09G 5/00 (2006.01); G06T 15/30 (2006.01); G06T 15/10 (2006.01) |
U.S. Cl. 345—582 [345/423; 345/427; 345/607] | 12 Claims |
1. An object collation method comprising:
a registration procedure for registering registered data of a registered object in a database; and
a collation procedure for collating an input image of a target object with said registered data;
said target object having a location and position;
said registration procedure comprising the steps of:
storing a three-dimensional shape of the registered object; and
storing a texture space calculated from a texture group indicating luminance and/or color information of each position of
a surface of the registered object under various illumination conditions;
said collation procedure comprising the steps of:
taking a two-dimensional image of the target object as the input image;
generating an illumination fluctuation space, which is an image space to represent the input images of the target objects
at the location and position of each target object under various illuminating conditions, defined by an image group which
is obtained by converting said three-dimensional shape and said texture space according to said location and position; and
collating the target object and the registered object based on distance between said illumination fluctuation space and said
input image, wherein a result of said collating step is used to determine whether said target object is said registered object.
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