WO1993003573A1 - Dispositif de prise de vues - Google Patents

Dispositif de prise de vues Download PDF

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Publication number
WO1993003573A1
WO1993003573A1 PCT/EP1992/001800 EP9201800W WO9303573A1 WO 1993003573 A1 WO1993003573 A1 WO 1993003573A1 EP 9201800 W EP9201800 W EP 9201800W WO 9303573 A1 WO9303573 A1 WO 9303573A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
signal
process control
analog
tube
Prior art date
Application number
PCT/EP1992/001800
Other languages
German (de)
English (en)
Inventor
Josef Kirmeier
Original Assignee
Josef Kirmeier
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 Josef Kirmeier filed Critical Josef Kirmeier
Priority to EP92916725A priority Critical patent/EP0597955A1/fr
Publication of WO1993003573A1 publication Critical patent/WO1993003573A1/fr

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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
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00283—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a television apparatus

Definitions

  • a completely different kind of "picture taking" is the copying of documents. This is about reproducing the regular two-dimensional image of a template as a two-dimensional copy on a sheet of paper.
  • electrostatically operating copying machines are used, in which a light-electric, rapidly rotating drum is used for optoelectrical recording and for the immediately subsequent transfer of the electrostatic charge image onto a sheet of paper.
  • the present invention relates to a technique in which images of two- or three-dimensional objects are to be recorded, of which copies are to be made or whose information content is to be provided as a digitalized image information signal at an electrical connection.
  • Field of application of a device relating to the present invention is, for example, the production of copies from books, foils and the like in particular.
  • the present invention is an image pickup device having the features set out in claim 1. Further refinements and developments of the invention emerge from the associated subclaims.
  • an electronic vacuum image pick-up tube with an analog electrical output signal which is known in principle and which supplies an analog image signal.
  • Such tubes are known, for example, as Newicon, Super Orticon and the like.
  • Such tubes contain a photoelectrically operating screen on which the two-dimensional image of a two-dimensional or three-dimensional object is to be optically reproduced.
  • the photoelectric screen of the tube is scanned inside the evacuated tube using an electron beam, usually line by line of the image.
  • the electrical scanning signal is immediately available in analog form at the signal output of the tube.
  • this image recording tube is followed by an electronic device which comprises a preamplifier, an analog / digital converter, an image memory and a signal output unit in series connection. At the output of this device, a digitized image signal corresponding to the analog signal output of the tube is obtained.
  • the device according to the invention further comprises a process control device which can be controlled from a keypad.
  • a process control device which can be controlled from a keypad.
  • the process control device can be used to control the amplification of the preamplifier, the deflection system of the tube, the image memory, the lighting and the like, namely the lighting that is required in the individual case in order to use the image recording device according to the invention to be able to record the template.
  • the analog / digital converter contained in the device connected downstream of the tube can expediently also be a circuit comprising a comparator and a digital / analog converter.
  • FIG. 1 shows an overall picture of an embodiment of the invention
  • FIG. 2 shows the circuit of comparator and converter already mentioned above.
  • the image recording device designated by 1 in FIG. 1 comprises the actual image recording tube 2.
  • an already available tube can be used for this.
  • 3 and 4 denote a (horizontally scanning) cell deflection system and a (vertically scanning) image deflection system. In the case of magnetic deflection, these are known to be systems integrated with one another in a coil arrangement. With 5 and 6 are deflection amplifiers and with 7 and 8 are still referred to below to be described digital / analog converter.
  • the output terminal 11 of the tube 2 is connected to the input of a preamplifier 12, which is followed by a circuit 13 which is an analog / digital converter or a circuit according to FIG. 2.
  • the output of this circuit 13 is followed by an image memory 14 and this is followed by the output unit 15 with the output connections 16, 17 and 18.
  • the process control device already mentioned is designated by 21, the outputs 22 to 25 of which are connected to the converters 7 and 8 as well as to the preamplifier 12 and the circuit 13.
  • Further outputs 26 and 27 of the process control device serve to control the lighting 31 or the output unit 15 which may be required.
  • the keypad 40 which is connected to the process control device 21 or is a component thereof, contains the keys required for control. Remote control or control for which input 121 is provided can also be provided (in addition).
  • the function of a device according to FIG. 1 is that the analog output signal K is first amplified in the preamplifier 12, the degree of amplification of which can already be selected via the process control device or its output 24.
  • the output signal of the preamplifier 12 controlled in this way goes into the analog / digital converter 13, in which the digitization of the analog or gray values of the output signal K of the tube 2 takes place. Again, this mode of operation can be controlled from the process control device or from the keypad.
  • the output signal V of the circuit 13 is sent to an image memory 14, which can carry out intermediate storage adapted to the individual case.
  • the output signal of the output unit can be at the connection 16 an output signal corresponding to the SCSI standard, which is further processed accordingly, for example transmitted by fax can be.
  • the output unit delivers an output signal adapted to the operation of a (graphic) printer.
  • the output unit 15 can also have an output 18, from which a video signal (bypassing the corresponding circuit point mentioned above) can also be taken, which can be given directly to a television set, for example.
  • FIG. 2 shows a circuit replacing the analog / digital converter 13 of FIG. 1 with a digital / analog converter 113 and a comparator 213 in the circuit-like connection with one another as indicated.
  • the converter 113 supplies the graded reference voltage values for the threshold value settings of the comparator 213.
  • the output signal is again a digitized signal.
  • the preamplifier 12 can be operated as a linear amplifier, but can also be operated as a positive or negative logarithmic amplifier, it being possible for the various functions of the amplifier 12 to be switched by the process control device 21.
  • An example of an operating mode of a device is that in which the electron beam used to scan the individual pixels of the screen 102 of the tube 2 is in horizontal or horizontal direction.
  • Line direction scans 3500 pixels.
  • the step-wise deflection signal which is supplied by the converter 7 to the horizontal deflection, the electron beam can be shifted discontinuously from pixel to pixel of the cell and the discrete pixel signal (as an analog signal) can be recorded and digitized in stage 13.
  • the horizontal deflection therefore does not take place in an analog-linear manner, but in steps corresponding to the step-by-step signal of the digital / analog converter 7 controlled by the process control device 21.
  • the switching tents of this converter 7 are connected via the process control device 21 to the converter device 13 or of the converter device according to FIG. 2, coupled for the signal of the pixel information (unless the mode of operation for the analog output signal on
  • Output connection 18 of the output unit 15 is requested and set).
  • the deflection of the electron beam is operated in a vertical manner.
  • 2500 cells are provided.
  • the converter 8 supplies the correspondingly graduated deflection signal for this vertical deflection or deflection of the lines among one another.
  • the corresponding codification for pixel scanning is to be provided.
  • path length compensation of the electron beam can be provided for different path lengths with respect to a point in the middle and one at the edge of the image field. This can be done by modulating the timing of the converter in question.
  • the analog / digital converter 13 or the circuit combination according to FIG. 2 can be used to generate an 8-bit or a 10-bit signal corresponding to 256 or 1024 gray levels.
  • the pixel information of the individual pixels, the scanning of which is coordinated with the aid of the process control device, can be amplified linearly or logarithmically with the aid of the preamplifier 12, namely positive-logarithmic or negative-logarithmic. With the logarithmically controlled amplification, a gray value increase or decrease can be carried out, as can be useful in special applications.
  • the artificial lighting described above can be dispensed with.
  • Such a lens can be a plastic glass with, for example, a pyramidal roughening of its surface.
  • An image recording device has compared to the
  • a graphic printer laser printer, matrix printer, thermal printer and the like
  • a graphic printer can be controlled directly.
  • the video interface of the printer can also be controlled directly, so that e.g. the printout of the image taken by the tube 2 can be delivered within 5 seconds (the latter depending on the special design of such a printer).
  • the device according to the invention does not require any additional computer, no special software and / or other units which are used for
  • the device according to the invention can be used as a camera wherever image acquisition and reproduction (as a copy) with a resolution of 300 dpi, based on the A4 format, is sufficient.
  • An advantage over a line scan camera is that the device according to the invention can carry out the entire image acquisition in a fraction of a second.
  • the invention is therefore of particular importance there and its application is particularly advantageous when very fast image acquisition with digital output
  • the device according to the invention has the special feature that it has a direct connection for a printer, namely a connection with a digital output signal, and the possibility for a direct connection
  • a data modem can be integrated into the device according to the invention, so that this device can also be operated remotely via a data line.
  • the device according to the invention is suitable, the
  • Output image information so that this information can be transmitted directly as a fax.
  • the camera can not only be operated locally using the keypad, but also remotely.
  • the digital signal is available at the SCSI data output of the device according to the invention for the computer used. Since the data are retrieved from an image memory of this device, an identical address assignment takes place in the working memory of the computer, which is reproducible.
  • Data is transferred via a standard SCSI interface and can therefore be connected directly to any computer.
  • the internal command set of the device enables direct integration into the respective analysis software with the control of various operating functions.
  • the resolution of the device according to the invention is many times higher (up to 3600 x 3600 pixels) than with cameras already on the market, but has the same frame rate.
  • the digital signals can also be transmitted without problems and over long distances.
  • a device according to the invention can also be used in measurement technology with non-contact measurement.
  • the internal image memory 14 is with the digital deflection 7, 8 and the image conversion 13 via the
  • Process controller 21 firmly linked. This ensures that the first digitized pixel always occupies the first bit in the image memory. This is an essential prerequisite for accurate, reproducible measurements and evaluations in measurement technology.
  • the device according to the invention is to be used as part of an autonomous image measurement analysis system. The measurement result is reproducible because the first recorded and digitized Dot, whatever the defined memory address is, what is required for exact, reproducible measurement and analysis.
  • a device according to the invention advantageously has, for example

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

Un dispositif de prise de vues comprend un tube analyseur (2) utilisé couramment pour prendre des images vidéo et un circuit électronique (12-15) connecté en aval du tube. Ce dispositif peut être exploité de manière réglable (21) de façon à générer des signaux adaptés au raccordement (17) d'une imprimante et le cas échéant à d'autres raccordements (16, 18).
PCT/EP1992/001800 1991-08-07 1992-08-07 Dispositif de prise de vues WO1993003573A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92916725A EP0597955A1 (fr) 1991-08-07 1992-08-07 Dispositif de prise de vues

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4126187.9 1991-08-07
DE19914126187 DE4126187A1 (de) 1991-08-07 1991-08-07 Bildaufnahme-vorrichtung

Publications (1)

Publication Number Publication Date
WO1993003573A1 true WO1993003573A1 (fr) 1993-02-18

Family

ID=6437878

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001800 WO1993003573A1 (fr) 1991-08-07 1992-08-07 Dispositif de prise de vues

Country Status (3)

Country Link
EP (1) EP0597955A1 (fr)
DE (1) DE4126187A1 (fr)
WO (1) WO1993003573A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4285004A (en) * 1980-02-25 1981-08-18 Ampex Corporation Total raster error correction apparatus and method for the automatic set up of television cameras and the like
US4393410A (en) * 1981-11-13 1983-07-12 Wespac Multiple camera automatic digitizer and method
EP0109038A2 (fr) * 1982-11-10 1984-05-23 Wang Laboratories Inc. Terminal de communication pour un système d'information de bureau
DE3609931A1 (de) * 1985-03-25 1986-09-25 Ehud Jerusalem Shor Diaprojektionseinrichtung
US4841375A (en) * 1986-05-29 1989-06-20 Kabushiki Kaisha Toshiba Image-resolution conversion apparatus for converting a pixel-density of image data

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4285004A (en) * 1980-02-25 1981-08-18 Ampex Corporation Total raster error correction apparatus and method for the automatic set up of television cameras and the like
US4393410A (en) * 1981-11-13 1983-07-12 Wespac Multiple camera automatic digitizer and method
EP0109038A2 (fr) * 1982-11-10 1984-05-23 Wang Laboratories Inc. Terminal de communication pour un système d'information de bureau
DE3609931A1 (de) * 1985-03-25 1986-09-25 Ehud Jerusalem Shor Diaprojektionseinrichtung
US4841375A (en) * 1986-05-29 1989-06-20 Kabushiki Kaisha Toshiba Image-resolution conversion apparatus for converting a pixel-density of image data

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PETER ZASTROW 'FERNSEHEMPFANGSTECHNIK' 1977 , FRANKFURTER FACHVERLAG , FRANKFURT *
U. TIETZE UND CH. SCHENK 'HALBLEITERSCHALTUNGSTECHNIK' 1990 , SPRINGER VERLAG , BERLIN *

Also Published As

Publication number Publication date
DE4126187A1 (de) 1993-02-11
EP0597955A1 (fr) 1994-05-25

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