Image recognition device

• US 5,067,161 A
• Filed: 08/03/1988
• Issued: 11/19/1991
• Est. Priority Date: 07/09/1984
• Status: Expired due to Fees

• Current Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Original Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Inventors: Nishimura, Masahiro, Tsukiyama, Noriyuki, Hinoda, Seisuke, Ishihara, Hideshi, Mikami, Kazuo
• Primary Examiner(s): Boudreau, Leo H.
• Application Number:
  US07/228,836
• Time in Patent Office: 1,203 Days
• Field of Search: 358/125, 358/126, 358/166, 382/18, 382/27, 382/28, 382/30, 382/34, 382/41, 382/25
• US Class Current: 382/222
• CPC Class Codes: G06V 10/24 Aligning, centring, orientation detection or correction of the image

Abstract

A visual recognition device receives video signals representing an object to be recognized from a video camera, converts the video signals to a two-valued input pattern, and compares the input pattern with a standard pattern to recognize the object. The recognition device includes an auxiliary computing unit which carries out a predetermined auxiliary computation during a horizontal scan period of the video camera, in accordance with the state of the input pattern; a main computation unit for carrying out, during a vertical return scan blanking period of the video camera, a main computation based on computation results of the auxiliary computation unit; and a recognition unit for recognizing the input pattern with respect to the standard pattern based on computation results of the main computation unit with respect to the patterns.

Claims

1. A visual recognition device which receives video signals representing an object to be recognized from a video camera, converts said video signals to a two-valued input pattern, and compares said input pattern with a standard pattern to recognize said object, comprising:

an auxiliary computing means for carrying out a predetermined auxiliary computation during a horizontal scan period of said video camera, according to a state of the input pattern;

a main computation means for performing a main computation operation based on computation results of said auxiliary computation means, said main computation operation being carried out only during a vertical return scan blanking period of said video camera; and

a recognition means for recognizing said input pattern with respect to said standard pattern based on said computation results of said main computation means with respect to said patterns.