EP0205529A1 - Appareil d'analyse d'images - Google Patents

Appareil d'analyse d'images

Info

Publication number
EP0205529A1
EP0205529A1 EP19860900209 EP86900209A EP0205529A1 EP 0205529 A1 EP0205529 A1 EP 0205529A1 EP 19860900209 EP19860900209 EP 19860900209 EP 86900209 A EP86900209 A EP 86900209A EP 0205529 A1 EP0205529 A1 EP 0205529A1
Authority
EP
European Patent Office
Prior art keywords
chart
carrier
illuminating
analysing
imaging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19860900209
Other languages
German (de)
English (en)
Inventor
Gordon James Neilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TACHANALYSIS Ltd
Original Assignee
TACHANALYSIS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB848431982A external-priority patent/GB8431982D0/en
Priority claimed from GB858518810A external-priority patent/GB8518810D0/en
Application filed by TACHANALYSIS Ltd filed Critical TACHANALYSIS Ltd
Publication of EP0205529A1 publication Critical patent/EP0205529A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/002—Specific input/output arrangements not covered by G06F3/01 - G06F3/16
    • G06F3/005—Input arrangements through a video camera
    • 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
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/002—Analysing tachograph charts

Definitions

  • This invention relates to apparatus for analysing graph cal in ormation on a planar carrier.
  • the inven- tion is particularly, but not exclusively, applicable to the analysis of graphical data such as the traces on a tachograph chart-
  • tachographs are now compulsory on certain classes of vehicle. These devices have various benefits in improving road safety and regulating transport operations.
  • analysis of tachograph charts has hitherto been carried out in practice by eye, which is time consuming and inaccurate.
  • An ob ect of the present invention is to provide an apparatus for the automatic analysis of tachograph charts, or similar data, which will enhance the practical useful- ness of such charts.
  • the invention provides apparatus for analysing graphical informartion on a planar carrier, compri s ng: means for illuminating said carrier; imaging means operable to provide an accurate representation of the graphical information by means of a digitised video signal or a numerical array; and means defining a datum point within the area viewed by the imaging means.
  • the invention provides a method of analysing a tachograph or like chart, including illu ⁇ minating the chart from behind, and imaging the front of the chart to provide a digitized video signal or numerical array.
  • Fig. 1 is a block diagram of an apparatus embodying the invention
  • Fig. 2 is a schematic cross-sectional view of a chart platen and associated parts used in the apparatus of Fig. 1;
  • Fig. 3 is a plan view of a lens member ⁇ f Fig. 2;
  • Fig. 4 is a cross-sectional side view of a boss used in Fig. 2.
  • tachograph charts are loaded into a hopper 100 from which they are removed one at a time by a pick/feed mechanism 102 and loaded by a loader mechanism 104 onto a chart platen assembly 106 for analysis. After analysis, the charts are discharged to an analysed chart hopper 108. Suitable mechanisms for handling the charts will be apparent to those skilled in the art, and thus the parts 100, 102, 104, 108 are not described in detail herein. Alternat vely, charts could be loaded in and removed from the platen assembly 106 by hand.
  • the analysis of the chart is performed by imaging the chart by a video camera 110 to provide an analog video signal which is converted to digital format in A/D converter 112 and suppl ed to a microcomputer 114.
  • the microcomputer 114 is programmed to extract the desired information from the video signal and to provide a desired analysis on a printer 116. Data can also be transferred to a mainframe computer or other data handling devices.
  • the apparatus also includes a video monitor 118 driven by the microcomputer 114 via a D/A converter 120.
  • the video image can also be displayed on the monitor 118 via the D/A converter 120, and can be multiplexed with text resulting from the analysis. This allows areas of the chart image which are unusual or anomalous to be drawn to the operator's attention on a real-time basi s .
  • the whole chart area is imaged by video camera 110, and the record traces are identified and quantized by examination of the digitized video signal.
  • a datum point is established, e.g. by a fixed central l- ' ght spot as in Fig. 4 below, or by means of a special marking on the chart .
  • the chart could be rotated past a camera or an array of light sensitive elements to provide a video signal or a numerical array.
  • Figs. 2 to 4 illustrate a preferred form of the platen assembly 106.
  • the preferred embodiment to be described has two features which over ⁇ come or itigate these problems, namely (1) illu ination of the chart from the rear, and (2) the use of a special lens men.ber .
  • a tachograph chart 10 is mounted on a transparent holder 12, which may suitably be in the form of a slide or drawer.
  • the central aper ⁇ ture of the chart 10 is engaged by a boss 40.
  • a lens 16 images the chart 10 in the video camera.
  • the chart 10 is illuminated from below by a toro dal lamp 18, which is provided with a toroidal reflector 20 and a plane circular reflector 22.
  • the geometrical relationship of the lens 16, lamps 18, and plane reflec- tor 22 is such that the i age in the latter of the lamp 18 ( as indicated at 18') fills the field of view of the lens 16, indicated at 24.
  • maximum utilisation of the available light is achieyed.
  • Tachograph charts, and certain other charts, are recorded by means of styli which form substantially V-shaped grooves in a coating.
  • rear illumination gives a sharper and hence more accurate image; it causes the grooves to be illuminated in a distinct manner which can be readily imaged regardless of the body colour of the chart, whilst surface marks such as finger marks are not illuminated and thus do not give rise to spurious images.
  • a colour filter between the chart 10 and the lamp 18. This may be used to remove from view printed matter on the underside of the chart.
  • the imaging is further improved by the lens member 26.
  • the member 26 comprises a plane base 28 from which project two toroidal segments 30,32 of semi-circular cross-section. In use, the segments 30, 32 overlie inner and outer tracks of a conventional tachograph chart 10 and enhance their i aging by providing both magnification (approx mately x 3) and a condenser lens effect.
  • the lens member 26 as shown has a segmental opening 36 to allow the chart 10 and means carrying it, such as boss 40, to be sl d into place.
  • the lens member 26 could be vertically displaceable in which case the parts 30,32 could extend through 360°C.
  • the boss 40 is provided (Fig. 4) with a central aperture 38 which passes illumination from the lamp 18 to produce a bright light spot in the centre of the field of view of the lens 16, the remainder of the central area being dark because of, the member 42.
  • This light spot is imaged by the video camera to provide a datum for establishing coordinates of the chart indicia, thus reducing the mechanical accuracy required in positioning the chart .
  • Tachograoh charts in current use may have either of two forms of central aperture, one relatively small and circular, the other larger and elongate or pear- shaped.
  • the boss 40 is adapted for the first type of chart and a cap 44 may be press-fitted thereon to receive the second type.
  • the cap 44 is provided with an aperture 46 to reveal the aperture 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

Appareil d'analyse de données graphiques sur un support plan, par exemple un diagramme tachographique, utilisant une caméra vidéo (110) et un convertisseur A/N (112) ou des appareils équivalents pour produire un signal vidéo numérisé destiné à être analysé par un micro-ordinateur (118) via un convertisseur N/A (120), et pouvant être multiplexé avec le texte résultant de l'analyse. Dans un mode préféré de réalisation (Fig. 2) le diagramme est éclairé depuis l'arrière et cet éclairage, en combinaison avec une ouverture, fournit une donnée.
EP19860900209 1984-12-19 1985-12-16 Appareil d'analyse d'images Withdrawn EP0205529A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB8431982 1984-12-19
GB848431982A GB8431982D0 (en) 1984-12-19 1984-12-19 Automatic chart analyser
GB858503588A GB8503588D0 (en) 1984-12-19 1985-02-12 Image analysis apparatus
GB8503588 1985-02-12
GB858518810A GB8518810D0 (en) 1984-12-19 1985-07-25 Image analysis
GB8518810 1985-07-25

Publications (1)

Publication Number Publication Date
EP0205529A1 true EP0205529A1 (fr) 1986-12-30

Family

ID=27262543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860900209 Withdrawn EP0205529A1 (fr) 1984-12-19 1985-12-16 Appareil d'analyse d'images

Country Status (2)

Country Link
EP (1) EP0205529A1 (fr)
WO (1) WO1986003867A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9121970D0 (en) * 1991-10-16 1991-11-27 Trutac Limited Method and apparatus for reading tachograph charts
NL9101746A (nl) * 1991-10-18 1993-05-17 Wouterus Hendrikus Maria Dekke Werkwijze en inrichting voor het automatisch verwerken van op een tachograafschijf geregistreerde gegevens.
FR2700868B1 (fr) * 1993-01-22 1996-02-02 Atcom Sarl Procédé et dispositif de lecture et de traitement des informations d'un disque de chronotachygraphie.
CH696897A5 (it) * 1997-01-17 2008-01-15 Ing Mauro Balestra Procedimento per la lettura microscopica dei dischi odocronografici dei tachigrafi.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003066A (en) * 1959-02-25 1961-10-03 Benjamin L Snavely Gating circuit for scanning trace converter
DE1921456B2 (de) * 1969-04-26 1971-11-04 Automatische auswerteeinrichtung fuer scheibenfoermige runde diagrammtraeger
US3639767A (en) * 1969-09-16 1972-02-01 Valentin Mikhailovich Sitniche Photoelectric tracer comprising two lenses or apertures located along a common radius from an axis of rotation
US3696249A (en) * 1970-09-14 1972-10-03 Itek Corp Detail boundary detection systems
CA992207A (en) * 1971-11-19 1976-06-29 Hermann Ruhl Pen chart analyser
GB1354335A (en) * 1971-12-15 1974-06-05 Atomic Energy Authority Uk Apparatus for causing relative movement of a point along a trace
US3908081A (en) * 1972-02-03 1975-09-23 Efficient Instr Corp Apparatus for converting graph data into a form suitable for computer processing
CH584948A5 (fr) * 1973-11-16 1977-02-15 Tvi Television Ind Sa
GB1547959A (en) * 1975-03-24 1979-07-04 Smiths Industries Ltd Tachograph charts
DE2609648A1 (de) * 1976-03-09 1977-09-15 Messerschmitt Boelkow Blohm Vorrichtung zur digitalen erfassung und/oder speicherung von auf einer ebenen vorlage befindlichen analogen informationen wie punkten, linien oder anderer beliebiger graphischer gebilde
DE3221823A1 (de) * 1982-06-09 1983-12-15 Ainedter Beteiligungs- und Entwicklungsgesellschaft mbH, 5020 Salzburg Halbautomatisches digitalisierverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8603867A1 *

Also Published As

Publication number Publication date
WO1986003867A1 (fr) 1986-07-03

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Inventor name: NEILSON, GORDON JAMES