EP0144319A1 - Numeriseur video de documents - Google Patents

Numeriseur video de documents

Info

Publication number
EP0144319A1
EP0144319A1 EP83902338A EP83902338A EP0144319A1 EP 0144319 A1 EP0144319 A1 EP 0144319A1 EP 83902338 A EP83902338 A EP 83902338A EP 83902338 A EP83902338 A EP 83902338A EP 0144319 A1 EP0144319 A1 EP 0144319A1
Authority
EP
European Patent Office
Prior art keywords
document
video
manipulative
microprocessor
high speed
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Withdrawn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
EP83902338A
Other languages
German (de)
English (en)
Other versions
EP0144319A4 (fr
Inventor
Michael Rothbart
Robert D. Therien
Thomas W. Terminal Data Corporation OLIVER
Thomas W. Roller
Robert D. Williams
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.)
Terminal Data Corp
Original Assignee
Terminal Data Corp
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
Application filed by Terminal Data Corp filed Critical Terminal Data Corp
Publication of EP0144319A1 publication Critical patent/EP0144319A1/fr
Publication of EP0144319A4 publication Critical patent/EP0144319A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/0057—Conveying sheets before or after scanning
    • H04N1/00572—Conveying sheets before or after scanning with refeeding for double-sided scanning, e.g. using one scanning head for both sides of a sheet
    • H04N1/00575—Inverting the sheet prior to refeeding
    • H04N1/00578—Inverting the sheet prior to refeeding using at least part of a loop, e.g. using a return loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/0057—Conveying sheets before or after scanning
    • H04N1/00572—Conveying sheets before or after scanning with refeeding for double-sided scanning, e.g. using one scanning head for both sides of a sheet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/0057—Conveying sheets before or after scanning
    • H04N1/00588—Conveying sheets before or after scanning to the scanning position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/0057—Conveying sheets before or after scanning
    • H04N1/00591—Conveying sheets before or after scanning from the scanning position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/0057—Conveying sheets before or after scanning
    • H04N1/00599—Using specific components
    • H04N1/0061—Feed belts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/00631—Ejecting or stacking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
    • H04N1/0285—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array in combination with at least one reflector which is in fixed relation to the light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
    • H04N1/0287—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array using a tubular lamp or a combination of such lamps

Definitions

  • U.S. patent No. 3,988,062 discloses a photographic microfilm or microfiche document recorder that automatically moves documents for photographing and selectively may turn them over for copying both sides. Non-responsive logic is employed. A state-counter determines the steps in the operation of the machine. Magnetically actuated clutches and brakes control the motions of belts that carry the documents.
  • U.S. patent No. 4,027,870 discloses a modification of the structure of the above patent in which the turn-over mechanism is at right angles to the main translation path of the documents. The documents are turned end-for-end rather than side for side.
  • U.S. patent No. 3,677,159 discloses a photographic micro- film camera that employs a servo system loop to control film motion in combination with a pair of idler arms.
  • a digital control circuit reduces the velocity of the film in steps for decelerating the film.
  • the digital circuit has nothing to do with digitizing video signals.
  • a microprocessor controls a servo system to move each document so that a digital video signal is produced according to the writings upon the document.
  • a desirably high throughput of 3,000 document images per hour is attained fay utilizing a high speed for moving the documents and a slow speed for video scanning the same.
  • the document is moved forward from the loading position at a high speed to beyond the video scanning area, is stopped, and then moved backward at low speed for video scanning. Then the document may be continued backward to the flip-over device, emerging therefrom moving forward at high speed until it reaches the video scanning area, after which it moves further forward at low speed for video scanning the second side of the document. Thereafter, it moves still further forward at high speed to exit the apparatus as a whole.
  • the microprocessor control can be altered by the operator to accomplish the above manipulation, except that the document moves exclusively at high speed after leaving the flip-over device and the second side of the document, if any, is not scanned. Further, the microprocessor control can be altered to scan one side of the document and then exit it without flip-over.
  • Fig. 1 is a simplified side elevation view of the document video digitizer machine.
  • Fig. 2 is a block diagram of the whole electrical system.
  • Fig. 3 is a block-schematic diagram of the servo system.
  • Fig. 4 is the initial part of the flow diagram for the microprocessor of Fig. 2.
  • Fig. 5 is the remaining part of the flow diagram for the microprocessor of Fig. 2.
  • numeral 1 identifies the feed table, upon which the operator (not shown) places a document 2 for the purpose of converting the text thereof to video - signals.
  • the apparatus can be constructed for documents of any size, but a typical document size would be 23. centimeters (cm) by 21.6 cm; i.e. 11" x 81 ⁇ 2", with a minimum size for the same apparatus of about half this size.
  • the document is preferably placed upon table 1 with a long side parallel to the length of the table, and with the head of the document pointed to the right in Fig. 1.
  • the document is actually placed upon a plurality of spaced belts 3, which overlie the table and are held taut by rollers 4 and 5, the latter being mechanically connected to a motor "M" of Fig. 3 by belt 6.
  • Vacuum chamber 7 lies beneath belts 3.
  • motor M shall be energized and when a vacuum shall be established in chamber 7 is determined by controlling micro- processor 40 of Fig. 2 , according to the flow chart of Fig. 4. Accordingly, the functioning of the apparatus will be detailed in the consideration of Fig. 4 and 5.
  • Sensor 8 senses that a document is, or is not, at the feed station on table 1. Sensor 8 may be actuated by the stoppage of the air flow through it upon a document being placed over it.
  • belts 10 on main table 11 are put in motion, also belts 3 of the feed table. This results in document 2 being rapidly translated to the left, in Fig. 1, say at 254 cm per second. This continues until sensor 14 is intercepted, which is substantially the whole length of main table 10.
  • the document passes sensor (s) 15, which detect skew of the document, if any, in a dynamic manner.
  • sensor (s) 15 detect skew of the document, if any, in a dynamic manner.
  • Two aligned sensor elements are employed. If the document is not skewed, both elements are influenced at the same time. If the document is skewed, one element might be influenced one millisecond before the other. This time interval corresponds to a large skew, say 15 degrees. Smaller skews are detectable.
  • the microprocessor controls the table belts to return the document to the operator at feed table 1 for re-positioning correctly and start translating the document to sensor 14 again.
  • belts 10 are reversed at a slow speed, say 56 cm/sec, and the scanning takes place.
  • Camerascanner 16 is electronically activated to accomplish this.
  • the slow motion of the document provides the vertical component of the video scansion, while an elongated multiple light-sensitive element in the camera provides the horizontal component along each (television) line of the scansion. While the term “slow” is used herein, that speed of scanning a document is fast with respect to known art.
  • the document be illuminated along a narrow transverse area that is imaged by objective lens 17 upon light-sensitive element 18 within the camera.
  • the preferred embodiment utilizes a high light intensity as a consequence of the reasonably rapid translation of the document at 56 cm/sec and the nominal sensitivity of the light- sensitive element 13.
  • the light intensity is approximately 300,000 Lux, being of uniform intensity across the width of the document and extending about 0.6 cm in the direction of translation.
  • the optical system has certain unusual characteristics. Some documents, such as color brochures, have a "shiny" (specular reflective) surface to the paper. Should the optical- system direct light vertically down upon such a document only a blank image would be obtained.
  • a linear light source 20 such as a quartz-halogen incandescent lamp, approximately 28 cm long and of 1,000 watts ra-cing is situated at one focus of elliptical mirror 21. The other focus is at the document.
  • Canta.t ray 23 depictsthe optical path from source 20 to plane mirror 22, to the document and then upwards to lens 17. Most of the light illuminating the document is reflected from the sides of elliptical mirror 21.
  • "Cold" mirror 22 is employed to pass away the infra-red radiant energy (heat) from the lamp, and to reflect only the visible energy.
  • Light-sensitive element 18 as normally embodied is sensitive to infra-red as well as visible light energy. This is an important reason as to why the infra-red energy must be removed from the light that it receives.
  • Heat sink 24 is located near behind cold mirror 22 and accepts the infra-red energy. This is manifest as heat and so the several cooling fins are integral with the heat sink.
  • the sink is cooled by a brisk flow of air along the fins, which flow is also directed at lamp 20 for the cooling thereof. This air is provided by a fan-blower and ducts according to known practice and so these have not been shown.
  • belts 10 move forward at slow speed from the time sensor 15 is reached, camera 16 is energized, and the second side is scanned as it moves from sensor 15 to sensor 14. Thereafter, it is moved further forward at high speed into the catch tray.
  • the video signal thus produced is 180° out of phase with respect to that of side one.
  • An electronic buffer in inter- face 42 acting as a shift register inverts the data to compensate for this phase reversal.
  • Camera-scanner 16 is rigidly supported to the rest of the apparatus, in part, by cylindrical tube 38.
  • the distance from the documents on belts 10 and lens 17 may be 55 cm; the lens having a 60 millimeter focal length.
  • Light-sensitive element 18 is preferably a CCD linear array, such as the Fairchild 143. It is spring mounted against the rear mount of lens 17, so that focus will be maintained. The depth of focus is about 1/10th millimeter.
  • the several electronic circuits of the camera-scanner such as timing, electrical clamp, switching for A & 3 pixels ⁇ f the CCD, automatic gain centrol of the video signal, gamma correction aperture correction, and threshold, are according to the Video- scan camera. Model VS2200, of the Terminal Data Corp., Woodland Hills, California. Additionally, the circuits and information of the Fairchild 143 CCD instruction manual may be used.
  • the threshold circuit constitutes the analog to digital converter in the camera-scanner.
  • microprocessor 40 is the basic elament . It may be a SC3 80/10 board , having an 8080A microprocessor .
  • An RS232C interface is resident upon the microprocessor circuit board, to which a monitor 41 can be connected for running diagnostic tests, should there be circuit trouble.
  • Interface control board 42 connects via a multibus to microprocessor 40 and similarly to the other elements of major importance in the apparatus.
  • An input/output set of connections from control board 42 passes to Feed Table / Transport Servo entity 43. Therefrom are connections to feed table motor 44 and separately to transport table motor 45, for the control of these motors.
  • Document camera-scanner 16 is connected for input/output functioning by an RS422 interface; aiso, an enable scanner connection 47, which puts this device in operating condition when a page of document is to be scanned to produce video signals. At other times the camera is inoperative, since spurious video signals would otherwise be created.
  • Fig. 3 is a block-schematic diagram of the servo system; block 43 in Fig. 2.
  • Input terminal 50 receives reverse the belts commands, either fast or slow, as the case may be. These pass into inverting amplifier 51 in order to provide the inverse of the forward commands to the error amplifier.
  • Input terminal 52 receives forward commands, either fast or slow, and is connected directly to error amplifier 53.
  • Input terminal 54 receives an output from tachometers that are separately connected, to each of the belt systems, as the case may be.
  • the commands from either terminals 50 or 52 are from microprocessor 40 (Fig. 2), are continuously applied as long as a forward or a reverse command is to be executed by the belts involved.
  • the voltage level that represents the command has a constant value and represents the true value for determining the speed of translation of the belts involved.
  • the input from the tachometer involved, at terminal 54 represents the actual speed of translation of the corresponding belts.
  • Tachometer filter 55 reduces the speed of response of the system so that high frequency oscillations, as caused by the motor-tachometer coupling resonance, cannot occur.
  • Error amplifier 53 gives an output corresponding to the difference between the voltage level at either terminal 50 or 52 and that at terminal 54.
  • the amplitude and the polarity of the output from amplifier 53 gives the remainder of the elements of Fig. 3 electrically represented information as to whether motor 44 or 45 is to rotate faster or slower, forward or reverse.
  • Amplifier 56 of the differential type, simultaneously performs several functions, according to the designation thereof as "volts to amperes converter and pulse-width modulator generator".
  • Pseudo-triangle wave generator produces- an approximate triangular wave, such as shown by the small waveform adjacent to the output of generator 57. This may be a square wave oscillator, the known triangular wave output of which is utilized. This waveform enters the + terminal of amplifier 56.
  • the D.C. output from error amplifier 53 enters the - terminal of amplifier 56 through an isolating resistor. Also through an isolating resistor the current sensed as flowing through motor 44 or 45 as a voltage appearing across a small resistance value resistor 49, which is connected between the motor and ground return.
  • the error amplifier When the motor is running, the error amplifier provides a continuous voltage output as a result of any error developed between the command voltage and the tachometer voltage. This output is then applied to pulse width modulator 56, which adjusts the square-wave duty cycle accordingly. This duty cycle translates into an increase or decrease in current to the motor.
  • Amplifier 56 and its peripherals thus performs three functions 1) converts a D.C. voltage input to motor current output, 2) converts a D.C. voltage to a pulse-width modulated squarewave (along with generator 57) , and 3) provides motor current limiting (with resistor 49).
  • the output of amplifier 56 becomes the input to voltage amplifier 58, and the output thereof passes to the amittar- follower cascade consisting of transistors 59, 63 and 64.
  • Diodes 61 and 65 are used to speed the transition between "on” and “off” of the subsequent circuits in switching amplifier fashion, thereby reducing the energy loss and consequently reducing the heating of the output circuit semiconductors.
  • Driver transistor 63 increases the power level to adequately drive parallel output boosters 64, the latter also being properly characterized as a push-pull switching type power amplifier.
  • the base input of transistor 59 is also connected to a supply voltage, say 50 volts, through a series of similarly poled diodes constituting clamp 66. With this clamp absent, the V ce (voltage across collector to emitter junction) of output booster 64 is 2.6 volts. This gives a power dissipation of 130 watts, with the 50 volt supply. With the clamp present, the voltages in the transistor circuits are adjusted so that the V ce is only 0.25 volt and the dissipation is only 12.5 watts.
  • Diode 67 inserted at the output emitter of transistor 63 and the input to boosters 64, is a protection diode.
  • output boosters 64 is comprised of four power transistors, of the silicon power type. Should one of these fail in use, the failure is invariably a fusion of the collector, emitter and base into one short-circuit conductor. This allows the "+50 volts" power supply for these boosters to revert back to the emitter resistor of driver transistor 63. This destroys the resistor and the heat or fire resulting destroys the circuit board at that location, so that a new circuic board is required as a replacement. Diode 67 prevents this.
  • diode 67 In the normal functioning of this part of the circuit diode 67 is forward biased and acts like a conductor. When a booster failure occurs diode 67 is back biased and the circuit is opened. Current flow to the resistor of transistor 63 is thus prevented and there is no damage. Considering this matter further, it is usual that only one power transistor fails. When this occurs and it becomes a short circuit, this de-energizes the other transistors in parallel therewith, and the other transistors d ⁇ not fail.
  • the power output from boosters 64 is connected to motor 44 or 45 by conductor 68.
  • This output may be a current of 50 amperes at a voltage of 50 volts in a preferred embodiment of this apparatus.
  • Diode 69 allows a fast recovery with . respect to current changes by negating the inductance of the motor.
  • Short circuit protect entity 70 is a transistor that senses too great current in the booster and turns off the drive at transistor 59 under such conditions.
  • Elongated rectangle 71 labeled "negative complement (mirror image)" is schematic nomenclature for identifying a duplication of all of the elements from 59 through 70 that are shown in Fig. 3.
  • the square waveform below motor “M” represents a voltage output waveform of +50 volts. That is contributed by the circuit elements 59-70 that are shown in Fig. 3.
  • the voltage of -50 volts is contributed by the negative complement 71.
  • the double-pointed arrows signify that the pulse width may be modulated to increase or decrease the current, as has been described.
  • Motors 44 and 45 are direct current motors.
  • the first activity is dependent upon there being a "Document at feed station" 76. Until that occurs the "Wait" return path is taken and the apparatus remains waiting for the document.
  • the document is placed at the feed station by a human operator, or an automatic document feed apparatus.
  • "Enable feed station vacuum” 77 occurs; i.e., in vacuum chamber 7 in Fig. 1.
  • the next activity is "Set fast forward transport” 78; i.e., belts 10 in fast forward on the main table, Fig. 1. That activity allows acceptance of the document upon the main table once it moves off of the feed table.
  • the next activity is "Set feed table transport in fast forward” 79.
  • the next activity is "Wait 1 ⁇ 2 second" 86 decision point, which is interposed to allow the document to return to the operator. Thereafter, "Set 'stop' transport” 87 is activated and the microprocessor returns to the "Start" 75 condition. The operator is to properly position the document and to start the above-recited sequence over again. In order to extinguish the skew error indicator lamp the operator must depress the "Reset” button on the control panel. The “Reset” is connected to interface 42 in Fig. 2.
  • the next activity is to "Enable scanner, side 1" 91; i.e., to activate camera- scanner 16 of Fig. 1.
  • Next, is to "Notify Host 'scanner ready'" 92; i.e., the apparatus is ready to produce video signals from the document that is in the apparatus. In effect, "Do you wish to have this occur?"
  • the "Host” is a control microcomputer", minicomputer, or equivalent, that determines overall strategy for the document video digitizer apparatus of this invention, likely in concert with other apparatus that makes use of the digitized video signals.
  • it is the equivalent to a very fast acting "operator", or agency that establishes what the operative plan shall be.
  • the program thereof primarily controls the document transport system.
  • the software handles control of the movement of the documents through the system, including; error warning, position sensing, operator command and diagnostic routines.
  • the control section of the program resides in the RAM at 3D00H and may not extend beyond the stack, which starts at 4000H and is approximately 32 Bytes long.
  • the system utilities reside at 400H, and include port set (.set) and reset (.res) routines, a pause (.delay) routine, and a bipolar status check routine (.newmait).
  • Bits on the two input (sense) ports statl and stat2, are active "low” to the software.
  • Statl devotes 5 of its 8 bits to the document position sensors. Bits 2, 3 s 7 are not used.
  • Stat2 uses the low order nibble (4 bits) to describe system conditions and errors. The "hi" order nibble represents the current operator command.
  • Stat3 is not implemented.
  • the two output (command) ports, com! and com2, direct system functions. Coml sends ready, enable and error commands to the system.
  • Com2 directs the motion and speed of the transport and enables the feed table vacuum and motion.
  • Com3 is not used.
  • Logic polarity is described by the following signal levels.
  • the input ports, statl (OE4H) and stat2 (OESH) are active when low.
  • the output ports, coml (OE8H) and com2 (OE9H) are more complex.
  • the logic is active when hi. That is, a given command signal, such as flipper vacuum, rests at a zero or low level.
  • a given command signal such as flipper vacuum
  • the active hi command port outputs are inverted to active when low on the apparatus side of interface 42 of Fig. 2.
  • all of the individual output command signals, and all of the individual input sense signals are defined as active hi signals. This is to facilitate readability.
  • the logic still ultimately handles these signals as described above; sense signal logic is active when low and command signal logic is active when hi.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

Dispositif permettant de manipuler des documents à haute vitesse et produisant un signal de sortie vidéo numérique de haute définition. Un organe de transport de documents (10) déplace les documents (2) à haute vitesse pendant les opérations d'entrée (1), retournement (31) et sortie (30), et à environ un cinquième de cette vitesse pour le balayage vidéo pendant le défilement pour produire le signal vidéo. Une servocommande (43) assure un mouvement initial vers l'avant et vers l'arrière pour obtenir un balayage de haut en bas. Le servocircuit est protégé électriquement (70). Le capteur vidéo (18) est couplé solidement au système optique (17). Une source lumineuse allongée (20), un réflecteur elliptique (21) et un miroir "froid" (22) permettent d'obtenir une zone éclairée transversale allongée sur le document lors de son défilement.
EP19830902338 1983-06-07 1983-06-07 Numeriseur video de documents. Withdrawn EP0144319A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1983/000887 WO1984005005A1 (fr) 1983-06-07 1983-06-07 Numeriseur video de documents

Publications (2)

Publication Number Publication Date
EP0144319A1 true EP0144319A1 (fr) 1985-06-19
EP0144319A4 EP0144319A4 (fr) 1987-06-17

Family

ID=22175244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830902338 Withdrawn EP0144319A4 (fr) 1983-06-07 1983-06-07 Numeriseur video de documents.

Country Status (3)

Country Link
EP (1) EP0144319A4 (fr)
JP (1) JPS60500693A (fr)
WO (1) WO1984005005A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH026757U (fr) * 1988-06-21 1990-01-17

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1368565A (en) * 1971-11-25 1974-10-02 Ricoh Kk Optical sensing arrangements
EP0051227A2 (fr) * 1980-10-31 1982-05-12 Kabushiki Kaisha Toshiba Dispositif d'entrée pour des informations d'image
US4424535A (en) * 1982-03-19 1984-01-03 Terminal Data Corporation Document video digitizer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677159A (en) * 1970-07-27 1972-07-18 Quantor Corp Microfilm camera
US3988062A (en) * 1974-11-25 1976-10-26 Terminal Data Corporation Two-sided document recorder
US4027870A (en) * 1976-10-04 1977-06-07 Terminal Data Corporation End for end document inverter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1368565A (en) * 1971-11-25 1974-10-02 Ricoh Kk Optical sensing arrangements
EP0051227A2 (fr) * 1980-10-31 1982-05-12 Kabushiki Kaisha Toshiba Dispositif d'entrée pour des informations d'image
US4424535A (en) * 1982-03-19 1984-01-03 Terminal Data Corporation Document video digitizer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MICRO-ELECTRONICS, vol. 7, no. 2, 1975, pages 60-63, Luton, GB; T. SIMMS: "The application of CCD's to documents scanning" *
See also references of WO8405005A1 *

Also Published As

Publication number Publication date
JPS60500693A (ja) 1985-05-09
JPS6356749B2 (fr) 1988-11-09
WO1984005005A1 (fr) 1984-12-20
EP0144319A4 (fr) 1987-06-17

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