Automatic system for monitoring persons entering and leaving changing room

• US 6,525,663 B2
• Filed: 03/15/2001
• Issued: 02/25/2003
• Est. Priority Date: 03/15/2001
• Status: Expired due to Fees

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Trajkovic, Miroslav, Gutta, Srinivas, Colmenarez, Antonio
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Nguyen, Tai T.
• Application Number:
  US09/809,572
• Publication Number:
  US 20020167403A1
• Time in Patent Office: 712 Days
• Field of Search: 340/573.1, 340/539, 340/531, 340/689, 340/691.1, 340/693.5, 340/692, 340/331, 340/332, 340/565, 340/566
• US Class Current: 340/573.1
• CPC Class Codes: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/19613 Recognition of a predetermined image pattern or behaviour pattern indicating theft or intrusion
• CPC Class Codes: G08B 13/19641 Multiple cameras having overlapping views on a single scene
• CPC Class Codes: G08B 13/19695 Arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves

Abstract

Briefly, an alarm system monitors the entry and exit of a fitting room. Various devices, including cameras for imaging, are used to scan customers as they enter and leave. Using image analysis, analysis of the audio signature of footfalls, and other criteria, the system attempts to match the images of customers leaving with stored images of customers entering. If no match can be found, an alarm signal is generated.

Claims

1. A device for automatically supervising a fitting room, comprising:

a controller programmed to receive first and second monitor signals respectively comprising first and second audio signals from an environment monitor, responsive to a person entering an area and said person leaving said area, respectively;

said controller being programmed to compare said first and second audio signals and to generate an alarm when said first and second audio signals differ beyond a threshold.

2. A device as in claim 1, wherein:

said first and second monitor signals include first and second images of said person entering and said person leaving, respectively;

said controller is programmed to distinguish and compare faces in said first and second images, said alarm being responsive to a result thereof.

3. A device as in claim 1, wherein:

said first and second monitor signals include first and second images of said person entering and said person leaving, respectively;

said controller is programmed to compare portions of said first and second images to generate an image comparison result;

said controller is further programmed such that said alarm signal is more likely to be generated when said comparison result indicates said first and second image portions are very different than when said first and second images are substantially the same.

4. A device as in claim 3, wherein:

said first and second monitor signals include first and second audio signals responsive to said person entering and said person leaving, respectively;

said controller is programmed to compare said first and second audio signals;

said controller is programmed such that when said first and second audio signals match but others of said monitor signals do not match, said controller is programmed to generate an alarm and when said first and second audio signals do not match and said others do not match, said controller is programmed not to generate an alarm.

5. A method of monitoring customers entering and leaving a fitting room, comprising:

imaging a customer entering said fitting room to produce an entering image comprising a head region and an other region;

imaging a customer leaving said fitting room to produce a leaving image comprising a head region and an other region;

storing said entering image;

comparing said leaving image head region with said entering image head region;

comparing said leaving image other region with said entering image other region;

generating an alarm signal when said leaving image head region with said entering image head region match and said leaving image other region and said entering image other region do not match.

6. A method as in claim 5, further comprising:

recording a sound generated by said customer entering to produce an entering audio signal;

recording a sound generated by said customer leaving to produce a leaving audio signal;

comparing said entering and leaving audio signals;

said step of generating including generating said alarm signal responsively to a result of comparing said entering and leaving audio signals.

7. A method of monitoring a fitting room, comprising:

recording images of persons entering said fitting room to create profile records;

imaging persons leaving said fitting room;

comparing at least one first portion of said profile records with a corresponding portion of said images of said persons leaving said fitting room to produce a first comparison;

comparing at least one second portion of said profile records with a corresponding portion of said images of said persons leaving said fitting room to produce a second comparison;

generating a signal responsively to a result of said step of comparing including generating a first signal when a result of said first comparison indicates a match but the results of said second comparison do not indicate a match and generating a second signal otherwise.

8. A program portion stored on a computer readable medium for producing an alarm signal, said program portion comprising

a first program segment for receiving images of persons entering an area and for receiving images of persons leaving said area;

a second program segment for comparing at least one first portion of said images of persons entering with a corresponding portion of said images of said persons leaving to produce a first comparison;

a third program segment for comparing at least one second portion of said images of said persons entering with a corresponding portion of said images of said persons leaving to produce a second comparison;

a fourth program portion for generating a signal responsively to a result of said comparing including generating a signal when a result of said first comparison indicates a match but the results of said second comparison do not indicate a match.

9. A device for monitoring an area, said device comprising:

an image input;

a comparator connected to the image input to receive images of persons entering an area and to receive images of persons leaving said area;

said comparator being configured to compare at least one first portion of said images of persons entering with a corresponding portion of said images of said persons leaving to produce a first comparison;

said comparator configured to compare at least one second portion of said images of said persons entering with a corresponding portion of said images of said persons leaving to produce a second comparison;

said comparator configured to generate a signal responsively to a result of said comparing including generating an alarm signal when a result of said first comparison indicates a match but the results of said second comparison do not indicate a match.