Pattern recognition device

• US 5,469,512 A
• Filed: 09/07/1993
• Issued: 11/21/1995
• Est. Priority Date: 09/08/1992
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Arisawa, Shigeru, Fujita, Masahiro
• Primary Examiner(s): Boudreau, Leo H.
• Application Number:
  US08/117,494
• Time in Patent Office: 805 Days
• Field of Search: 382/2, 382/14, 382/15
• US Class Current: 382/118
• CPC Class Codes: G06V 10/44 Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components

Abstract

The recognition pattern device is intended to improve the recognition ratio. In a pre-processing unit 3, an input pattern is prepared based on the image taken from a video camera 1. Then, in a comparing processing unit 4, the input pattern is compared with a basic pattern stored in a function learning storing unit, and the deformed amount of the input pattern to the basic pattern is calculated. Thus, in a deformed amount analysis unit, the deformed amount is analyzed. Finally, in a person'"'"'s information learning storing unit, on the basis of the above result, the standard pattern stored therein is regenerated.

Claims

1. A pattern recognition device comprising:

a basic pattern storing means for storing a basic pattern;

a standard pattern storing means for storing a standard pattern;

a preparing means for preparing an input pattern on the basis of inputted information;

a comparing means for comparing the input pattern prepared by the preparing means with the basic pattern stored in the basic pattern storing means, and calculating at least a deformed amount of the input pattern to the basic pattern and a correlation amount;

an analyzing means for analyzing the deformed amount calculated by the comparing means and generating an analysis result; and

a standard pattern regenerating means for regenerating a standard pattern stored in the standard pattern storing means as a function of at least the analysis result from the analyzing means and the correlation amount calculated by the comparing means.

2. A pattern recognition means according to claim 1, wherein the preparing means filters the inputted information with a Laplacean of Gaussian (LOG) filter, to detect a zero crossing point, and filters the inputted information with a low pass filter.

3. A pattern recognition device according to claim 1, wherein the basic pattern is divided into a series of blocks and the comparing means matches the input pattern with the basic pattern for each block, and calculates a movement amount of each block as the deformed amount.

4. A pattern recognition device according to claim 1, wherein the preparing means prepares the input pattern as a function of a face image.

5. A pattern recognition device according to claim 1, wherein the preparing means prepare an input pattern on the basis of inputted video image information of a particular person'"'"'s face, the basic pattern storing means stores image data of a human face as a basic pattern, and the standard pattern storing means stores visual image identification data as a standard pattern.

6. A pattern recognition device according to claim 5, wherein the standard pattern is obtained from a plurality of visual images from the same person.