WO2001069542A1 - Appareil de comptage de personnes ou d'objets - Google Patents
Appareil de comptage de personnes ou d'objets Download PDFInfo
- Publication number
- WO2001069542A1 WO2001069542A1 PCT/FR2001/000715 FR0100715W WO0169542A1 WO 2001069542 A1 WO2001069542 A1 WO 2001069542A1 FR 0100715 W FR0100715 W FR 0100715W WO 0169542 A1 WO0169542 A1 WO 0169542A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- passage
- optical sensor
- checked
- objects
- digital
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
Definitions
- the present invention relates to devices for counting people or objects, in particular people moving in a passage of a certain width which can admit several people across the width.
- the sensors used for counting people can essentially be grouped into three categories:
- 1- active sensors for example they emit an infrared beam; In the absence of anyone, this beam is not reflected. If a person passes, the beam is reflected on the person and this reflection is detected;
- a control line (light tube, painted line, painted checkerboard, etc.) is constantly detected by the sensor, except when a person passes by who obscures or modifies the signal.
- control line light tube, painted line, painted checkerboard, etc.
- These systems require ground implementation; 3- passive sensors without control line (video camera for example) which record the useful area and work on its modifications over time.
- Such a device essentially comprises: a set of detectors, each of the emitter-receiver type of electromagnetic waves, arranged so that people or objects have a relative movement relative to said set,
- control circuit intended to activate the detectors of the assembly sequentially so that they supply sequential signals representative of the presence or absence of a person or object in the field of the activated detector
- such a known counting assembly may be, for example, in the form of a fixed ramp arranged at a certain height above the ground and comprising a series of detectors each having an emitter providing a beam of light almost parallel infrared, visible or ultraviolet, part of which is reflected back to the associated receiver in the presence of a person or object to be detected.
- the beam In the absence of a person or object, the beam reaches the ground. The reflection towards the detector must then be below the detection threshold so as not to saturate the detector. In fact, it should be understood that the beam emitted being roughly parallel, the spot made on the obstacle is smaller than the obstacle regardless of its distance.
- 2,586,821 which relates to a device for counting people or objects: the detection is based on the observation of the absence of reflection of a reflective reference made up of one or more control lines (A, B) crossed by moving bodies. From this lack of reflection, a passage is deduced. It is certainly envisaged not to actually materialize the reference point, by using the ground directly, but this ground must then "have a high reflecting power", as described on page 7, lines 19 to 22, to allow visualization by reflection of the line. control.
- the major drawback of this kind of device is that it requires the presence of a reflective marker or a reflective floor, however, when designing a building, this aspect is very difficult to take into account because it influences negatively on the aesthetic aspect of the passage.
- the present invention aims to provide a more reliable, more efficient and less expensive counting device than the devices of the prior art.
- the counting apparatus according to the invention falls into the third category. Thus, there is no longer any constraint of materialization of reflective reference mark.
- the present invention goes against the phenomenon by using only one detection line. This solution makes it possible to limit the processor memory and to have on-board processing.
- the noise problem is dealt with at the level of a preprocessing algorithm. What distinguishes the present invention from the video cameras used until now is the fact that only two CCD bars are used.
- the present invention relates, in its broadest sense, to a device for counting people or objects according to claim 1. According to other characteristics of the invention:
- an optic consisting of one or two objectives, is associated with the two bars of the optical sensor so that their virtual linear images have a length at least equal to the width of the passage to be checked,
- the device is positioned at a height between 3 m and 10 m above the passage to be checked
- the device is entirely digital, the analog signal coming from each bar being, after amplification, immediately transformed into a digital signal in an associated analog / digital converter.
- a device for capturing people or objects essentially comprises an optical sensor, which is generally designated by 1, and a control and computer processing unit such as '' a computer or, more precisely, a microprocessor 2.
- the apparatus for counting people or objects according to the invention is intended to be positioned above the passage to be checked and one of the axes is perpendicular to the direction of movement of the persons or objects passing through said passage
- the sensor 1 consists of two charge coupling strips 3, 4 (called CCD for short in English), which are linear, identical, parallel, fixed parallel to each other and transversely to the passage to control.
- the two bars 3 and 4 are necessary to obtain two images, each corresponding to a virtual line on the ground, of very small width Lp, allowing the microprocessor 2 to determine the direction of the passage, incoming or outgoing , as well as the number of passages, or even their speeds V, taking into account the ambient lighting which can be the typical lighting of a store.
- Said processing unit tracks the time evolution of the background captured by the optical sensor (1) for the extraction of sudden changes due to the passage of said person or object.
- the counting acquisition and processing are carried out in real time by the microprocessor 2.
- the bars 3 and 4 are, for example of the type at 1024, 2048 or 3000 pixels or more depending on the technology of the bar, and electronically controlled shutter.
- the photosensitive line of each strip 3 or 4 is associated with an analog charge transfer register protected from light by a mask and responsible for sequentially transmitting each information item on the output of the sensor. From the lines of pixels it retrieves, the microprocessor 2 evaluates whether the sensor elements provide a sufficiently high signal and manages the control signals of the strips as explained below.
- each strip 3 or 4 is an analog signal, it is necessary to place between the strips and the microprocessor a analog / digital converter which will convert analog pixels into digital values readable directly by the microprocessor.
- two digital potentiometers are preferably placed between the pixel output signal and the converter to control the gain and the offset of the operational amplifier.
- the analog signal can be adjusted within the range provided by the two voltage references of the converter.
- the analog / digital converter provides gray levels, typically between 0 and 255, or more, and receives two reference voltages corresponding respectively to the analog levels of black and white.
- the distance between the bars for example 5 cm, is calculated so that the person or object passing under the device appears first on one line and then on the other since the direction of movement is determined by the time difference of the two lines.
- the microprocessor 2 manages the control of the two bars 3 and 4 and has, for example every 15 ms, two lines of 2048 pixels with a resolution of 255 gray levels. From these lines, the microprocessor performs the data processing and evaluates the site lighting level to adjust the gain and the threshold of the amplifier as well as the shutter time.
- microprocessor 2 will extract the information from the passage of a person as well as its meaning from the pairs of lines of 2048 pixels which are supplied to it. This treatment is carried out in two stages:
- a preprocessing algorithm consisting in extracting from the two lines of 2048 pixels in 255 gray levels, a line, for example of 256 values, in 0 or 1, representing the simplified trace of the passage under a group of cells bars (macro pixels).
- This first algorithm consists in extracting from the image a spot corresponding to the passage of a person or an object by eliminating the shadows and also treating the variations in lighting.
- a counting algorithm that is to say a form processing algorithm, which will update each line of 256 bits for example, information on the person or the object being passed and who will decide, according to criteria of speed, width, length and direction, if it has a valid shape to finally count it.
- This second algorithm deals with the complicated cases of people crossing each other, following each other in single file, presenting themselves in several groups or making round trips, and corresponds for example to that described in the aforementioned French patent No. 95 11 328.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Slot Machines And Peripheral Devices (AREA)
- Cash Registers Or Receiving Machines (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
- Image Processing (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60103522T DE60103522D1 (de) | 2000-03-10 | 2001-03-09 | Gerät zum zählen von personen und gegenständen |
EP01915459A EP1269423B1 (fr) | 2000-03-10 | 2001-03-09 | Appareil de comptage de personnes ou d'objets |
AT01915459T ATE268032T1 (de) | 2000-03-10 | 2001-03-09 | Gerät zum zählen von personen und gegenständen |
US10/238,875 US20030066875A1 (en) | 2000-03-10 | 2002-09-09 | Apparatus for counting people or objects |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0003121A FR2806193B1 (fr) | 2000-03-10 | 2000-03-10 | Appareil de comptage de personnes ou d'objets |
FR00/03121 | 2000-03-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/238,875 Continuation US20030066875A1 (en) | 2000-03-10 | 2002-09-09 | Apparatus for counting people or objects |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001069542A1 true WO2001069542A1 (fr) | 2001-09-20 |
WO2001069542A8 WO2001069542A8 (fr) | 2002-03-21 |
Family
ID=8847969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/000715 WO2001069542A1 (fr) | 2000-03-10 | 2001-03-09 | Appareil de comptage de personnes ou d'objets |
Country Status (6)
Country | Link |
---|---|
US (1) | US20030066875A1 (fr) |
EP (1) | EP1269423B1 (fr) |
AT (1) | ATE268032T1 (fr) |
DE (1) | DE60103522D1 (fr) |
FR (1) | FR2806193B1 (fr) |
WO (1) | WO2001069542A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8108055B2 (en) | 2007-12-28 | 2012-01-31 | Larry Wong | Method, system and apparatus for controlling an electrical device |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1921581A1 (fr) * | 2006-11-08 | 2008-05-14 | Smarteree GmbH | Procédé et appareil de surveillance d'un objet en mouvement |
TWI448977B (zh) * | 2011-12-08 | 2014-08-11 | Ind Tech Res Inst | 基於視訊分析的物件計數方法與裝置 |
US9294718B2 (en) | 2011-12-30 | 2016-03-22 | Blackberry Limited | Method, system and apparatus for automated alerts |
US20160259980A1 (en) * | 2015-03-03 | 2016-09-08 | Umm Al-Qura University | Systems and methodologies for performing intelligent perception based real-time counting |
US10282656B2 (en) * | 2017-01-11 | 2019-05-07 | Thomas Danaher Harvey | Method and device for detecting unauthorized tranfer between persons |
US10810481B2 (en) * | 2017-01-11 | 2020-10-20 | Thomas Danaher Harvey | Method and system to count movements of persons from vibrations in a floor |
FR3086782B1 (fr) | 2018-09-27 | 2021-12-03 | Aereco | Dispositif et procede de comptage de personnes |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4303851A (en) * | 1979-10-16 | 1981-12-01 | Otis Elevator Company | People and object counting system |
FR2586821A1 (fr) | 1985-08-29 | 1987-03-06 | Hochiki Co | Systemes pour determiner un nombre de corps mobiles. |
US5255301A (en) * | 1990-11-06 | 1993-10-19 | Shinkawa Electric Co., Ltd. | Apparatus for counting the number of passing persons by stature |
WO1994027408A1 (fr) * | 1993-05-14 | 1994-11-24 | Rct Systems, Inc. | Moniteur de trafic video pour surfaces de vente au detail et emplacements similaires |
JPH09107541A (ja) * | 1995-10-11 | 1997-04-22 | Clarion Co Ltd | 移動体カウント装置 |
FR2779832A1 (fr) | 1998-06-15 | 1999-12-17 | Quantaflow | Appareil de detection d'obstacles |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4000400A (en) * | 1975-04-09 | 1976-12-28 | Elder Clarence L | Bidirectional monitoring and control system |
FR2739208B1 (fr) * | 1995-09-22 | 1997-10-31 | Faiveley Transport | Procede de detection de la presence d'un element sur une portion de voie |
FR2739203B1 (fr) | 1995-09-27 | 1997-12-12 | Science Et Tec | Dispositif de comptage de personnes ou d'objets |
-
2000
- 2000-03-10 FR FR0003121A patent/FR2806193B1/fr not_active Expired - Fee Related
-
2001
- 2001-03-09 EP EP01915459A patent/EP1269423B1/fr not_active Expired - Lifetime
- 2001-03-09 WO PCT/FR2001/000715 patent/WO2001069542A1/fr active IP Right Grant
- 2001-03-09 DE DE60103522T patent/DE60103522D1/de not_active Expired - Lifetime
- 2001-03-09 AT AT01915459T patent/ATE268032T1/de not_active IP Right Cessation
-
2002
- 2002-09-09 US US10/238,875 patent/US20030066875A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4303851A (en) * | 1979-10-16 | 1981-12-01 | Otis Elevator Company | People and object counting system |
FR2586821A1 (fr) | 1985-08-29 | 1987-03-06 | Hochiki Co | Systemes pour determiner un nombre de corps mobiles. |
US5255301A (en) * | 1990-11-06 | 1993-10-19 | Shinkawa Electric Co., Ltd. | Apparatus for counting the number of passing persons by stature |
WO1994027408A1 (fr) * | 1993-05-14 | 1994-11-24 | Rct Systems, Inc. | Moniteur de trafic video pour surfaces de vente au detail et emplacements similaires |
JPH09107541A (ja) * | 1995-10-11 | 1997-04-22 | Clarion Co Ltd | 移動体カウント装置 |
FR2779832A1 (fr) | 1998-06-15 | 1999-12-17 | Quantaflow | Appareil de detection d'obstacles |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 08 29 August 1997 (1997-08-29) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8108055B2 (en) | 2007-12-28 | 2012-01-31 | Larry Wong | Method, system and apparatus for controlling an electrical device |
US8428754B2 (en) | 2007-12-28 | 2013-04-23 | Larry Wong | Method, system and apparatus for controlling an electrical device |
Also Published As
Publication number | Publication date |
---|---|
FR2806193A1 (fr) | 2001-09-14 |
ATE268032T1 (de) | 2004-06-15 |
EP1269423A1 (fr) | 2003-01-02 |
WO2001069542A8 (fr) | 2002-03-21 |
US20030066875A1 (en) | 2003-04-10 |
DE60103522D1 (de) | 2004-07-01 |
EP1269423B1 (fr) | 2004-05-26 |
FR2806193B1 (fr) | 2003-09-26 |
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