| US 7,499,569 B2 | ||
| Hand pattern switching apparatus | ||
| Hiromitsu Sato, Tokyo (Japan); Keiichi Yamamoto, Tokyo (Japan); Shinji Ozawa, Yokohama (Japan); Hideo Saito, Yokohama (Japan); and Hiroya Igarashi, Yokohama (Japan) | ||
| Assigned to Mitsubishi Fuso Truck and Bus Corporation, (Japan); and Keio University, (Japan) | ||
| Filed on Feb. 23, 2005, as Appl. No. 11/64,428. | ||
| Claims priority of application No. 2004-052014 (JP), filed on Feb. 26, 2004. | ||
| Prior Publication US 2005/0238202 A1, Oct. 27, 2005 | ||
| Int. Cl. G06K 9/00 (2006.01); G06F 3/033 (2006.01) | ||
| U.S. Cl. 382—103 [382/104; 382/203; 382/218; 715/863; 345/156; 348/77; 348/148] | 6 Claims |
| 1. A hand pattern switching apparatus which operates an object equipment based on the result of the image taken by an image
pickup means for taking an image of movement of a hand, comprising:
means for saving the image taken in a state where a hand does not exist in an image pickup area of the image pickup means,
as an initial image data;
differentiation means for obtaining a difference image data between an original image data, which is the image taken in a
state where a hand exists in the image pickup area of the image pickup means, and the initial image data, to determine a part
of the difference image data corresponding to a place close to a hand;
luminance detection means for obtaining an average luminance of the original image data corresponding to the part of the difference
image data in a place close to the hand obtained by the differentiation means; and
processing means for performing binary processing of the original image data by a threshold value based on the average luminance
obtained by the luminance detection means.
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