US5298697A
Expired / Lapsed
US
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Apparatus and methods for detecting number of people waiting in an elevator hall using plural image processing means with overlapping fields of view
Assignee: Hitachi Ltd
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Filing: 1992-09-21
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Granted: 1994-03-29
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Expires: 2012-09-21
Abstract
Abstract An apparatus for detecting people waiting for an elevator. A detecting unit detects the number of people waiting on the basis of an image from an image pickup unit and delivers that number to a corresponding second people waiting detecting unit. The apparatus includes a unit which generates a coefficient depending on a percentage of overlap of the field of view of a reference image pickup unit, which is one of several image pickup units, with the field of view of a different image pickup unit on the basis of data on the allocation of an elevator, and calculates the number of waiting people in the overall hall from the respective numbers of waiting people output from the plurality of image pickup units and those coefficients. The coefficient generating unit generates a maximum coefficient for the reference image pickup unit and a smaller coefficient for any remaining image pickup unit based on the of overlap of the field of view of the respective image pickup units. Thus, even if the fields of view of the plurality of image pickup units overlap, an accurate number of people waiting in the elevator hall, and free from an error in detection, is detected.
Inventors
- 👤 Masato Suzuki
- 👤 Hiromi Inaba
- 👤 Kiyoshi Nakamura
- 👤 Naofumi Nakata
- 👤 Hiroaki Yamani
- 👤 Naoto Oonuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/3476; B66B1/02; B66B1/06; B66B1/14; B66B1/18; B66B1/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
153 words
An apparatus for controlling operation of an elevator, based on detecting people waiting in an elevator hall, said apparatus comprising: a plurality of image pickup devices for picking up a plurality of images of the elevator hall, each image pickup device picking up an image of a respective field of view of the elevator hall, the respective fields of view overlapping by a known amounts; means for processing image signals from the plurality of image pickup devices to detect respective numbers of people waiting in each field of view; means for generating a set of coefficients based on the amounts of overlap of the fields of view; means for calculating the number of people waiting in the elevator hall, based on the generated coefficients and the respective detected numbers of people waiting in each field of view; and means for controlling the operation of the elevator based on the number of people waiting.
Claim 2
Independent Claim
153 words
An apparatus for controlling operation of an elevator, based on detecting people waiting in an elevator hall, said apparatus comprising: a plurality of image pickup devices for picking up a plurality of images of the elevator hall, each image pickup device picking up an image of a respective field of view of the elevator hall, the respective fields of view overlapping by a known amounts; means for processing image signals from the plurality of image pickup devices to detect respective numbers of people waiting in each field of view; means for generating a set of coefficients based on the amounts of overlap of the fields of view; means for calculating the number of people waiting in the elevator hall, based on the generated coefficients and the respective detected numbers of people waiting in each field of view; and means for controlling the operation of the elevator based on the number of people waiting.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1, wherein said coefficient generating means generates the coefficients further based upon a predetermined ratio of detected people waiting who enter an elevator.
Claim 4
Dependent Claim
68 words
An apparatus according to claim 1, wherein said coefficient generating means generates a reference coefficient for a selected one of said image pickup devices, and generates a coefficient for each of the remaining image pickup devices based upon the percentage of overlap of the respective field of view of said each of the remaining image pickup devices with the field of view of the selected image pickup device.
Claim 5
Dependent Claim
32 words
An apparatus according to claim 3, wherein said selected one of said image pickup devices is the image pickup device providing the image signal indicative of the maximum number of people waiting.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 1, wherein said coefficient generating means is provided in said people waiting detecting means.
Claim 7
Dependent Claim
17 words
An apparatus according to claim 1, wherein said coefficient generating means is provided in said controlling means.
Claim 8
Independent Claim
101 words
A method of controlling an elevator, comprising the steps of: (a) detecting respective numbers of people waiting in each of a plurality of fields of view in an elevator hall, the respective fields of view overlapping by known amounts; (b) generating a set of coefficients based on the amounts of overlap of the fields of view; (c) calculating the number of people waiting in the elevator hall, based on the generated coefficients and the respective detected numbers of people waiting in each field of view; and (d) controlling the operation of the elevator, based on the calculated number of people waiting.
Claim 9
Independent Claim
101 words
A method of controlling an elevator, comprising the steps of: (a) detecting respective numbers of people waiting in each of a plurality of fields of view in an elevator hall, the respective fields of view overlapping by known amounts; (b) generating a set of coefficients based on the amounts of overlap of the fields of view; (c) calculating the number of people waiting in the elevator hall, based on the generated coefficients and the respective detected numbers of people waiting in each field of view; and (d) controlling the operation of the elevator, based on the calculated number of people waiting.
Claim 10
Dependent Claim
65 words
A method according to claim 7, wherein step (b) comprises generating a reference coefficient for a selected one of fields of view, and generating a coefficient for each of the remaining fields of view, based upon the percentage of overlap of the respective field of view of said each of the remaining image pickup devices with the field of view of the reference image unit.
Claim 11
Dependent Claim
18 words
A method according to claim 8, wherein the selected field of view is directly before an allocated elevator.
Claim 12
Dependent Claim
32 words
An apparatus according to claim 3 wherein said selected one of said image pickup devices is the image pickup device closest to an elevator to which said controlling means has allocated service.
Claim 13
Dependent Claim
29 words
A method according to claim 8, wherein the selected field of view is the field of view for which the detected respective number of people waiting is a maximum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |