EP0696400A1 - Camera video numerique - Google Patents

Camera video numerique

Info

Publication number
EP0696400A1
EP0696400A1 EP94915123A EP94915123A EP0696400A1 EP 0696400 A1 EP0696400 A1 EP 0696400A1 EP 94915123 A EP94915123 A EP 94915123A EP 94915123 A EP94915123 A EP 94915123A EP 0696400 A1 EP0696400 A1 EP 0696400A1
Authority
EP
European Patent Office
Prior art keywords
camera
computer
camera according
control unit
unit
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Withdrawn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
EP94915123A
Other languages
German (de)
English (en)
Inventor
Michael Cieslinski
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.)
CIS Graphik und Bildverarbeitung GmbH
Original Assignee
CIS Graphik und Bildverarbeitung GmbH
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 CIS Graphik und Bildverarbeitung GmbH filed Critical CIS Graphik und Bildverarbeitung GmbH
Publication of EP0696400A1 publication Critical patent/EP0696400A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • the digital camera according to the invention Since the digital camera according to the invention has been designed and even optimized from the outset with regard to an application in the field of image processing, the image digitization takes place already in the camera.
  • an image recording unit, a signal processing unit, an A / D converter required for digitization and a control unit are provided in the camera according to the invention.
  • the digital video camera is controlled from the outside by commands or commands that are generated in an external computer and transmitted from there to the camera.
  • the commands or command words can be transmitted to the camera in serial form and the pixel data are then received by the camera in parallel form.
  • a CCD sensor unit can be used as the image recording unit.
  • control unit In order to achieve the necessary high speed to control the image recording unit, the control unit must be designed as hardware logic, which receives and decodes the commands sent by the computer with a command interpreter and executes them by a sequence control.
  • All other functions of the camera are also completely controlled by the external computer.
  • an exposure can be started at any time be ended.
  • the computer can read the image data from the camera. Since the camera only outputs the image data upon express request, the computer can, for example, program-program such image data individually or read them in blocks and store them in its main memory so that an expensive image memory can then be dispensed with in the computer.
  • the digital video camera can have further functions which can be controlled by the external computer, for example digital or analog inputs or outputs which can be read back or set, which can be galvanically decoupled.
  • a timer controlled by the computer can be provided for controlling an exposure time or a switch-on time of external light sources.
  • volatile or non-volatile read and / or read / write memories can be provided in the camera according to the invention, in particular for recording camera or sensor parameters or also for recording configuration data, which read or be read by the computer ⁇ can be written.
  • a digital video camera designated in its entirety by 1, has an image recording unit 10, which is preferably a CCD sensor unit, a signal processing unit 11, an analog / digital converter 12 and a control unit 13 with an upstream receiver / Driver stages 15 on, which are connected to one another in the manner shown in the figure.
  • the commands coming from the computer 20 are passed via the receiver / driver stages 15 to the control unit 13, in which the commands are decoded by a command interpreter 13b and converted into control signals for the image recording by means of the CCD image sensor 10 and the A / D converter 12 are implemented.
  • a dashed line in the drawing shows possible, and in many cases advantageous, additional image processing functions which can be carried out, for example, in a unit 16 for contour tracking or in a run length coding unit 17.
  • the image repetition frequency can also be significantly higher than in the FIGS conventional video cameras; For example, at a full resolution 125 Blder per second, and accordingly reduced at a entspre ⁇ resolution considerably higher image sequences, for example up näm ⁇ Lich added to 200 frames per second and processed.
  • the digital video camera according to the invention also enables secure transmission of the image data over long distances.
  • the selected transmission method allows distances between the camera 1 and the computer 20 of up to 1000 m, without any loss of image quality being feared and without the need for an intermediate amplifier. On top of that, a high level of interference immunity is also guaranteed for transmission via appropriate interfaces.
  • the internal gain and the basic brightness can be set from the computer 20 in the camera according to the invention.
  • the automatic gain control usually provided in conventional cameras interferes with some of the applications in the field of image processing and must therefore be switched off.
  • flexible adaptation to changing lighting conditions is often absolutely necessary. Due to the possibility of setting the gain and basic brightness digitally, both requirements can be met.
  • the integration duration can also be set by the latter.
  • the computer-controlled setting of the internal amplification it can also be used in cases where otherwise complex control of the camera aperture is necessary.
  • the time for starting an image acquisition can also be freely selected.
  • the image recording can be started at any time in the camera according to the invention by a command issued by the computer 20.
  • this property together with the adjustable integration time, gives a considerable time advantage compared to conventional video cameras, which is easily in the order of a factor 10 and higher.
  • the digitization of the image data in the camera ensures the assignment to light-sensitive elements (pixels) of the image recording sensor from the outset.
  • the exact assignment is not possible since only the sensor design, but not the clock signal with which the image sensor is read out, is transmitted.
  • the exact 1: 1 assignment is of crucial importance, since an assignment error would otherwise be included in the result as a position error.
  • the computer 20 used as an evaluation computer is substantially relieved, particularly in the case of high image sequences. If the digital video camera 1 according to the invention is equipped, for example, with the unit 17, a data reduction is already carried out in the camera by means of the run length coding carried out in the unit 17. **** *

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne une caméra vidéo numérique qui comprend une unité de prise de vues (10), une unité de mise en forme des signaux (11), un convertisseur analogique-numérique (12) et une unité de commande (13). Les fonctions de la caméra sont commandées depuis l'extérieur par des instructions (ordres) produites sous forme numérique par un ordinateur et transmises à l'unité de commande (11) par l'intermédiaire d'un ordinateur. Les instructions sont ensuite analysées par un interpréteur d'ordres (13b) et exécutées par une commande de déroulement (13a). La caméra peut en outre également comporter des entrées et/ou des sorties numériques ou analogiques découplées de manière galvanique, qui peuvent être sélectionnées ou lues depuis l'ordinateur. De plus, il est également possible de prévoir une minuterie réglable de préférence par l'ordinateur, afin d'assurer la commande d'un temps de pose et/ou d'une durée de mise sous tension de sources lumineuses externes.
EP94915123A 1993-04-26 1994-04-26 Camera video numerique Withdrawn EP0696400A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4313621A DE4313621C2 (de) 1993-04-26 1993-04-26 Verfahren zur Steuerung einer digitalen Videokamera und Anordnung zur Durchführung des Verfahrens
DE4313621 1993-04-26
PCT/EP1994/001311 WO1994026062A1 (fr) 1993-04-26 1994-04-26 Camera video numerique

Publications (1)

Publication Number Publication Date
EP0696400A1 true EP0696400A1 (fr) 1996-02-14

Family

ID=6486398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94915123A Withdrawn EP0696400A1 (fr) 1993-04-26 1994-04-26 Camera video numerique

Country Status (6)

Country Link
EP (1) EP0696400A1 (fr)
JP (1) JPH08508863A (fr)
CN (1) CN1101776A (fr)
AU (1) AU6648994A (fr)
DE (1) DE4313621C2 (fr)
WO (1) WO1994026062A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19707046A1 (de) * 1997-02-21 1998-08-27 Rolf Prof Dr Ing Eckmiller Lernfähiger "Active Vision" Implant Encoder
DE19943079A1 (de) * 1999-09-09 2001-03-15 Truetzschler Gmbh & Co Kg Vorrichtung an einer Karde oder Krempel, bei der ein Faserflor aus Textilfasern, z.B. Baumwolle, Chemiefasern u.dgl., gebildet ist
KR100544177B1 (ko) * 2000-01-18 2006-01-23 삼성전자주식회사 컴퓨터를 통한 디지털 컨텐츠의 저장 및 재생 기능을구비한 개인 휴대 장치의 제어방법 및 이에 따른 개인휴대장치의 동작방법
DE10064678C1 (de) 2000-12-22 2002-07-11 Kappa Opto Electronics Gmbh Verfahren zur Signalverbesserung in einer mit einer digitalen Farbvideokamera aufgenommenen Bilderfolge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3635687A1 (de) * 1986-10-21 1988-05-05 Messerschmitt Boelkow Blohm Bildaufnahmesensor
US5185883A (en) * 1990-10-26 1993-02-09 Data Translation, Inc. System for locating failure signals by comparing input data with stored threshold value and storing failure addresses in alternating buffers
DE9102874U1 (fr) * 1991-03-11 1991-05-29 Herzog, Rainer, Dipl.-Ing.Univ., 8501 Feucht, De
DE4132125C2 (de) * 1991-09-27 1994-07-07 Wolf Gmbh Richard Endoskop oder Kamera mit elektronischem Bildwandler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PROCEEDINGS OF THE SPIE- THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING, Bd.818, 1987, BELLIGHAM, USA Seiten 301 - 319 G.J. MARTIN ET AL. 'A High Resolution CCD Camera for Scientific and Industrial imaging Applications' *

Also Published As

Publication number Publication date
CN1101776A (zh) 1995-04-19
DE4313621A1 (de) 1994-10-27
WO1994026062A1 (fr) 1994-11-10
AU6648994A (en) 1994-11-21
JPH08508863A (ja) 1996-09-17
DE4313621C2 (de) 1995-09-21

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