WO2006058606A1 - File format for the organisation of data and control appliance - Google Patents

File format for the organisation of data and control appliance Download PDF

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Publication number
WO2006058606A1
WO2006058606A1 PCT/EP2005/012126 EP2005012126W WO2006058606A1 WO 2006058606 A1 WO2006058606 A1 WO 2006058606A1 EP 2005012126 W EP2005012126 W EP 2005012126W WO 2006058606 A1 WO2006058606 A1 WO 2006058606A1
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Prior art keywords
data
file format
image
imaging system
format according
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PCT/EP2005/012126
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German (de)
French (fr)
Inventor
Ernani M. Fernandes
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Valeo Schalter Und Sensoren Gmbh
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Publication of WO2006058606A1 publication Critical patent/WO2006058606A1/en

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    • 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
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N1/32128—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title attached to the image data, e.g. file header, transmitted message header, information on the same page or in the same computer file as the image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3225—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
    • H04N2201/3252—Image capture parameters, e.g. resolution, illumination conditions, orientation of the image capture device

Definitions

  • the present invention relates to a file format for the organization of data, in particular of image data and parameters associated with the image data, in which a header and at least one data area are provided.
  • Such file formats in particular image file formats, are known from the prior art and have the disadvantage that they are - mostly for reasons of compatibility, e.g. to older file format versions - for most applications have unnecessarily many parameter ranges or additional data fields in their respective headers, so that when using the appropriate format for storing a file often unnecessarily much space is required, although the header in question at least partially not for those to be stored Data contains meaningful information.
  • known file formats in particular image file formats, offer no possibility of storing, in addition to the actual image data and any parameters contained in the header, for example a degree of compression or the coding of the color space used or a color palette, further data belonging to the image. Accordingly, it is an object of the present invention to provide an improved file format, which has a low storage cost and allows flexible adaptation to data to be stored.
  • the header has parameter areas for storing parameters of an imaging system that is used in motor vehicles for generating camera images of an environment of the motor vehicle.
  • the parameters of the imaging system can be, for example, exposure data, such as an exposure time and / or an aperture setting or the like act.
  • typical operating parameters of the CCD image sensor such as e.g. its temperature
  • information on any binning modes used or the like in the header of the file format according to the invention can be stored.
  • other image sensors e.g. CMOS image sensors or any other image sensors whose respective operating parameters in the header of the file format according to the invention can be stored.
  • the parameter areas have areas for storing at least one time stamp and / or an index number, so that a time of generation of an in the camera image stored in accordance with the invention or an association of the camera image with a sequence of images is made possible.
  • the data area has at least one color channel.
  • the color channel for example, in the case of a monochrome image, the respective gray values of the pixels or, in the case of a color image, e.g. the RGB values corresponding to the respective color component are stored.
  • the memory depth of data in the data area can be selected as a function of parameters of an image sensor of an imaging system. For example, a memory depth of 8 bits can be selected for an image sensor with a low dynamic range, while a larger memory depth is selected for storing images of another image sensor.
  • the memory depth of data in the data area is 16 bits.
  • the file format according to the invention can be used particularly advantageously for storing and / or loading images and / or other data of an imaging system, in particular of a motor vehicle.
  • a control unit for processing camera images obtained by means of an imaging system of a motor vehicle is specified, which is characterized in that the control unit is suitable for storing and / or the file format according to one of claims 1 to 6 for loading data, in particular camera images.
  • the left-hand column of the table of FIG. 1 contains the indication of a byte number which represents a so-called offset which indicates the distance of the data field described in the right-hand column from the beginning of a file stored using the file format according to the invention as shown in FIG ,
  • the first four bytes of the file format contain the character string "ARIF" (automotive rated image format), which represents a designation of the file format according to the invention and can be used when reading in a file stored according to the invention for checking the file format.
  • ARIF automotive rated image format
  • Bytes 4 to 5 are provided for encoding a size of the header in bytes, and bytes 6 to 7 indicate a file version of the file format of the present invention.
  • Bytes 8 to 11 indicate in each case in the form of a 16-bit variable the origin coordinates of a camera image contained in the data area of the described file format. These origin coordinates allow i.a. storing a portion of an image as generated by an imaging system of a motor vehicle, not shown, wherein the origin of the partial image relative to the origin of the entire camera image may be indicated by the origin coordinates.
  • Bytes 16 to 19 contain information about so-called binning modes, which allow a combination of several pixels of the camera image in one dimension.
  • Bytes 20 to 159 of the variant of the inventive file format indicated in FIG. 1 are provided for storing a file name and comments, whereby bytes 59 and 159 each contain the value " ⁇ 0" and bytes 20 to 58 and 60 to 158 character strings whose zero termination is effected by the above-mentioned bytes 59 and 159.
  • Bytes 160 through 167 contain timestamp information that can be used, for example, to encode a time at which the camera image is stored.
  • CCD image sensor when using a CCD image sensor in the imaging system and parameters of the CCD image sensor can be stored. Similarly, when using other image sensors their respective parameters can be stored.
  • Byte 172 begins the data area of the image format according to the invention according to FIG. 1, in which, according to the present example, a color channel is provided for storing the image data.
  • the storage depth is 16 bits in the present case, but can be adjusted depending on the application or depending on the imaging system used.
  • the data area extends to the byte with the 172+ (rows * cols * 2) -1 offset, where rows is the number of image lines and cols is the number of image columns.

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

Abstract

The invention relates to a file format for the organisation of data, especially image data and parameters associated with the image data. According to the invention, the file format is provided with a header and at least one data area. Said file format is characterised in that the header comprises parameter regions for storing parameters of an image-producing system used in motor vehicles for producing camera images of the surroundings of a motor vehicle.

Description

Titel: Dateiformat zur Organisation von Daten und SteuergerätTitle: File format for the organization of data and control unit
Beschreibungdescription
Die vorliegende Erfindung betrifft ein Dateiformat zur Organisation von Daten, insbesondere von Bilddaten und den Bilddaten zugeordneten Parametern, bei dem ein Header und mindestens ein Datenbereich vorgesehen ist.The present invention relates to a file format for the organization of data, in particular of image data and parameters associated with the image data, in which a header and at least one data area are provided.
Derartige Dateiformate, insbesondere Bilddateiformate, sind aus dem Stand der Technik bekannt und weisen den Nachteil auf, dass sie - zumeist aus Gründen der Kompatibilität z.B. zu älteren Dateiformatversionen - für die meisten Anwendungsfälle unnötig viele Parameterbereiche oder zusätzliche Datenfelder in ihrem jeweiligen Header besitzen, so dass bei der Verwendung des entsprechenden Formats zur Speicherung einer Datei oftmals unnötig viel Speicherplatz benötigt wird, obwohl der betreffende Header zumindest teilweise keine für die zu speichernden Daten sinnvollen Informationen enthält.Such file formats, in particular image file formats, are known from the prior art and have the disadvantage that they are - mostly for reasons of compatibility, e.g. to older file format versions - for most applications have unnecessarily many parameter ranges or additional data fields in their respective headers, so that when using the appropriate format for storing a file often unnecessarily much space is required, although the header in question at least partially not for those to be stored Data contains meaningful information.
Daher sind die aus dem Stand der Technik bekannten Dateiformate zur Speicherung von Dateien in auf Microcontrollern oder digitalen Signalprozessoren (DSP) basierenden Anwendungen nur bedingt geeignet.Therefore, the file formats known from the prior art for storing files in applications based on microcontrollers or digital signal processors (DSP) are only of limited suitability.
Ferner bieten bekannte Dateiformate, insbesondere Bilddateiformate, keine Möglichkeit, neben den eigentlichen Bilddaten sowie ggf. im Header enthaltenen Parametern, die beispielsweise einen Kompressionsgrad oder die Codierung des verwendeten Farbraums oder einer Farbenpalette angeben, weitere zu dem Bild gehörende Daten abzuspeichern. Demgemäß ist es Aufgabe der vorliegenden Erfindung, ein verbessertes Dateiformat anzugeben, das einen geringen Speicheraufwand aufweist und eine flexible Anpassung an zu speichernde Daten ermöglicht.Furthermore, known file formats, in particular image file formats, offer no possibility of storing, in addition to the actual image data and any parameters contained in the header, for example a degree of compression or the coding of the color space used or a color palette, further data belonging to the image. Accordingly, it is an object of the present invention to provide an improved file format, which has a low storage cost and allows flexible adaptation to data to be stored.
Diese Aufgabe wird bei einem Dateiformat der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Header Parameterbereiche zur Speicherung von Parametern eines bildgebenden Systems aufweist, das bei Kraftfahrzeugen zur Erzeugung von Kamerabildern einer Umgebung des Kraftfahrzeugs verwendet wird.This object is achieved in a file format of the aforementioned type according to the invention that the header has parameter areas for storing parameters of an imaging system that is used in motor vehicles for generating camera images of an environment of the motor vehicle.
Auf diese Weise ist es möglich, die häufig zur weiteren Auswertung der erzeugten Kamerabilder benötigten Parameter und sonstige Daten des bildgebenden Systems direkt zusammen mit dem zugehörigen Kamerabild abzuspeichern, so dass eine weitere Auswertung ohne den zusätzlichen Aufwand einer separaten Ermittlung dieser Parameter bzw. sonstiger Daten erfolgen kann.In this way, it is possible to store the parameters and other data of the imaging system frequently required for further evaluation of the generated camera images directly together with the associated camera image, so that a further evaluation without the additional expense of a separate determination of these parameters or other data can.
Bei den Parametern des bildgebenden Systems kann es sich erfindungsgemäß beispielsweise um Belichtungsdaten wie z.B. eine Belichtungsdauer und/oder eine Blendeneinstellung oder dergleichen handeln. Ferner sind beim Einsatz von CCD- Bildsensoren in dem bildgebenden System beispielsweise typische Arbeitsparameter des CCD-Bildsensors wie z.B. dessen Temperatur, Angaben über ggf. verwendete binning-Modi oder dergleichen in dem Header des erfindungsgemäßen Dateiformats speicherbar. Ebenso sind bei der Verwendung anderer Bildsensoren wie z.B. CMOS-Bildsensoren oder beliebiger weiterer Bildsensoren deren jeweilige Arbeitsparameter in dem Header des erfindungsgemäßen Dateiformats speicherbar.According to the invention, the parameters of the imaging system can be, for example, exposure data, such as an exposure time and / or an aperture setting or the like act. Further, when using CCD image sensors in the imaging system, for example, typical operating parameters of the CCD image sensor, such as e.g. its temperature, information on any binning modes used or the like in the header of the file format according to the invention can be stored. Similarly, with the use of other image sensors, e.g. CMOS image sensors or any other image sensors whose respective operating parameters in the header of the file format according to the invention can be stored.
Bei einer vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens weisen die Parameterbereiche Bereiche zur Speicherung von mindestens einem Zeitstempel und/oder einer Indexzahl auf, so dass ein Zeitpunkt der Erzeugung eines in dem erfindungsgemäßen Dateiformat gespeicherten Kamerabildes oder eine Zuordnung des Kamerabildes zu einer Sequenz von Bildern ermöglicht wird.In an advantageous embodiment of the method according to the invention, the parameter areas have areas for storing at least one time stamp and / or an index number, so that a time of generation of an in the camera image stored in accordance with the invention or an association of the camera image with a sequence of images is made possible.
Bei einer weiteren vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens weist der Datenbereich mindestens einen Farbkanal auf. In dem Farbkanal können beispielsweise bei einem Monochrombild die jeweiligen Grauwerte der Bildpunkte oder bei einem Farbbild z.B. die der jeweiligen Farbkomponente entsprechenden RGB-Werte gespeichert werden.In a further advantageous embodiment of the method according to the invention, the data area has at least one color channel. In the color channel, for example, in the case of a monochrome image, the respective gray values of the pixels or, in the case of a color image, e.g. the RGB values corresponding to the respective color component are stored.
Besonders vorteilhaft ist die Speichertiefe von Daten in dem Datenbereich in Abhängigkeit von Parametern eines Bildsensors eines bildgebenden Systems wählbar. Beispielsweise kann bei einem Bildsensor mit einem geringen Dynamikumfang eine Speichertiefe von 8 bit gewählt werden, während zur Speicherung von Bildern eines anderen Bildsensors eine größere Speichertiefe gewählt wird.Particularly advantageously, the memory depth of data in the data area can be selected as a function of parameters of an image sensor of an imaging system. For example, a memory depth of 8 bits can be selected for an image sensor with a low dynamic range, while a larger memory depth is selected for storing images of another image sensor.
Bei einer weiteren vorteilhaften Ausführungsform der vorliegenden Erfindung beträgt die Speichertiefe von Daten in dem Datenbereich 16 bit.In a further advantageous embodiment of the present invention, the memory depth of data in the data area is 16 bits.
Besonders vorteilhaft ist das erfindungsgemäße Dateiformat zum Speichern und/oder Laden von Bildern und/oder sonstigen Daten eines bildgebenden Systems insbesondere eines Kraftfahrzeugs verwendbar.The file format according to the invention can be used particularly advantageously for storing and / or loading images and / or other data of an imaging system, in particular of a motor vehicle.
Als eine weitere Lösung der Aufgabe der vorliegenden Erfindung ist ein Steuergerät zur Verarbeitung von mittels einem bildgebenden System eines Kraftfahrzeugs erhaltenen Kamerabildern angegeben, das dadurch gekennzeichnet ist, dass das Steuergerät geeignet ist, das Dateiformat nach einem der Ansprüche 1 bis 6 zur Speicherung und/oder zum Laden von Daten, insbesondere von Kamerabildern, zu verwenden. Weitere Anwendungsmöglichkeiten und Vorteile der vorliegenden Erfindung sind in der nachstehenden Figurenbeschreibung unter Bezug auf Fig. 1 angegeben, die eine Ausführungsform des erfindungsgemäßen Dateiformats in Form einer Tabelle zeigt.As a further solution of the object of the present invention, a control unit for processing camera images obtained by means of an imaging system of a motor vehicle is specified, which is characterized in that the control unit is suitable for storing and / or the file format according to one of claims 1 to 6 for loading data, in particular camera images. Further application possibilities and advantages of the present invention are given in the following description of the figures with reference to FIG. 1, which shows an embodiment of the file format according to the invention in the form of a table.
Die linke Spalte der Tabelle aus Fig. 1 enthält die Angabe einer Byte-Nummer, die einen sog. Offset darstellt, der den Abstand des in der rechten Tabellenspalte beschriebenen Datenfelds von dem Dateianfang einer unter Verwendung des erfindungsgemäßen Dateiformats nach Fig. 1 gespeicherten Datei angibt.The left-hand column of the table of FIG. 1 contains the indication of a byte number which represents a so-called offset which indicates the distance of the data field described in the right-hand column from the beginning of a file stored using the file format according to the invention as shown in FIG ,
Die ersten vier Bytes des Dateiformats enthalten die Zeichenkette „ARIF" (automotive rated image format) , die eine Bezeichnung des erfindungsgemäßen Dateiformats darstellt und beim Einlesen einer erfindungsgemäß abgespeicherten Datei zur Überprüfung des Dateiformats verwendet werden kann.The first four bytes of the file format contain the character string "ARIF" (automotive rated image format), which represents a designation of the file format according to the invention and can be used when reading in a file stored according to the invention for checking the file format.
Die Bytes 4 bis 5 sind zur Kodierung einer Größe des Headers in Bytes vorgesehen, und die Bytes 6 bis 7 geben eine Dateiversion des erfindungsgemäßen Dateiformats an.Bytes 4 to 5 are provided for encoding a size of the header in bytes, and bytes 6 to 7 indicate a file version of the file format of the present invention.
Die Bytes 8 bis 11 geben jeweils in Form einer 16 bit - Variable die Ursprungskoordinaten eines im Datenbereich des beschriebenen Dateiformats enthaltenen Kamerabildes an. Diese Ursprungskoordinaten ermöglichen u.a. die Speicherung eines Teils eines Bildes, wie es von einem nicht gezeigten bildgebenden System eines Kraftfahrzeugs erzeugt wird, wobei der Ursprung des Teilbildes relativ zu dem Ursprung des gesamten Kamerabildes durch die Ursprungskoordinaten angegeben werden kann.Bytes 8 to 11 indicate in each case in the form of a 16-bit variable the origin coordinates of a camera image contained in the data area of the described file format. These origin coordinates allow i.a. storing a portion of an image as generated by an imaging system of a motor vehicle, not shown, wherein the origin of the partial image relative to the origin of the entire camera image may be indicated by the origin coordinates.
Die Bytes 16 bis 19 enthalten Informationen über sog. binning-Modi, die ein Zusammenfassen mehrerer Bildpunkte des Kamerabildes in jeweils einer Dimension ermöglichen. Die Bytes 20 bis 159 der in Fig. 1 angegebenen Variante des erfindungsgemäßen Dateiformats sind zur Speicherung einer Dateibezeichnung sowie von Kommentaren vorgesehen, wobei die Bytes 59 und 159 jeweils den Wert „\0" enthalten und die Bytes 20 bis 58 und 60 bis 158 Zeichenketten darstellen, deren Nullterminierung durch die vorstehend bereits genannten Bytes 59 und 159 erfolgt.Bytes 16 to 19 contain information about so-called binning modes, which allow a combination of several pixels of the camera image in one dimension. Bytes 20 to 159 of the variant of the inventive file format indicated in FIG. 1 are provided for storing a file name and comments, whereby bytes 59 and 159 each contain the value "\ 0" and bytes 20 to 58 and 60 to 158 character strings whose zero termination is effected by the above-mentioned bytes 59 and 159.
Die Bytes 160 bis 167 enthalten Zeitstempelinformationen, die beispielsweise zur Kodierung einer Uhrzeit verwendbar sind, zu der das Kamerabild gespeichert wird.Bytes 160 through 167 contain timestamp information that can be used, for example, to encode a time at which the camera image is stored.
Beispielhaft für die Speicherung von Parametern des bildgebenden Systems mittels dem erfindungsgemäßen Dateiformat sind in den Bytes 168 bis 171 als „camera gain" und „sequence count™ bezeichnete Parameter angegeben.By way of example for the storage of parameters of the imaging system by means of the file format according to the invention, the bytes designated as "camera gain" and "sequence count" are indicated in bytes 168 to 171.
Alternativ oder zusätzlich hierzu sind z.B. bei der Verwendung eines CCD-Bildsensors in dem bildgebenden System auch Parameter des CCD-Bildsensors speicherbar. Ebenso sind bei der Verwendung von anderen Bildsensoren deren jeweilige Parameter speicherbar.Alternatively or in addition, e.g. when using a CCD image sensor in the imaging system and parameters of the CCD image sensor can be stored. Similarly, when using other image sensors their respective parameters can be stored.
Mit Byte 172 beginnt der Datenbereich des erfindungsgemäßen Bildformats gemäß Fig. 1, in dem gemäß dem vorliegenden Beispiel ein Farbkanal zur Speicherung der Bilddaten vorgesehen ist.Byte 172 begins the data area of the image format according to the invention according to FIG. 1, in which, according to the present example, a color channel is provided for storing the image data.
Die Speichertiefe beträgt im vorliegenden Fall 16 bit, kann aber je nach Anwendung bzw. je nach verwendetem bildgebenden System angepasst werden.The storage depth is 16 bits in the present case, but can be adjusted depending on the application or depending on the imaging system used.
Der Datenbereich erstreckt sich bis zu dem Byte mit dem Offset 172+ (rows*cols*2) -1, wobei rows die Anzahl der Bildzeilen und cols die Anzahl der Bildspalten angibt. The data area extends to the byte with the 172+ (rows * cols * 2) -1 offset, where rows is the number of image lines and cols is the number of image columns.

Claims

Patentansprüche claims
1. Dateiformat zur Organisation von Daten, insbesondere von Bilddaten und den Bilddaten zugeordneten Parametern, bei dem ein Header und mindestens ein Datenbereich vorgesehen ist, dadurch gekennzeichnet, dass der Header Parameterbereiche zur Speicherung von Parametern eines bildgebenden Systems aufweist, das bei Kraftfahrzeugen zur Erzeugung von Kamerabildern einer Umgebung des Kraftfahrzeugs verwendet wird.A file format for organizing data, in particular image data and parameters associated with the image data, in which a header and at least one data area are provided, characterized in that the header has parameter areas for storing parameters of an imaging system used in motor vehicles for generating Camera images of an environment of the motor vehicle is used.
2. Dateiformat nach Anspruch 1, dadurch gekennzeichnet, dass die Parameterbereiche Bereiche zur Speicherung von mindestens einem Zeitstempel und/oder einer Indexzahl aufweisen.2. File format according to claim 1, characterized in that the parameter areas have areas for storing at least one time stamp and / or an index number.
3. Dateiformat nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Parameterbereiche Bereiche zur Speicherung von Parametern eines Bildsensors eines bildgebenden Systems aufweisen.3. File format according to one of the preceding claims, characterized in that the parameter areas have areas for storing parameters of an image sensor of an imaging system.
4. Dateiformat nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Datenbereich mindestens einen Farbkanal aufweist.4. File format according to one of the preceding claims, characterized in that the data area has at least one color channel.
5. Dateiformat nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Speichertiefe von Daten in dem Datenbereich in Abhängigkeit von Parametern eines Bildsensors eines bildgebenden Systems wählbar ist.5. File format according to one of the preceding claims, characterized in that the memory depth of data in the data area in dependence on parameters of an image sensor of an imaging system is selectable.
6. Dateiformat nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Speichertiefe von Daten in dem Datenbereich 16 bit beträgt.6. File format according to one of the preceding claims, characterized in that the memory depth of data in the data area is 16 bits.
7. Verwendung des Dateiformats nach einem der Ansprüche 1 bis 6 zum Speichern und/oder Laden von Bildern und/oder sonstigen Daten eines bildgebenden Systems insbesondere eines Kraftfahrzeugs. Steuergerät zur Verarbeitung von mittels einem bildgebenden System eines Kraftfahrzeugs erhaltenen Kamerabildern, dadurch gekennzeichnet, dass das Steuergerät geeignet ist, das Dateiformat nach einem der Ansprüche 1 bis 6 zur Speicherung und/oder zum Laden von Daten, insbesondere von Kamerabildern, zu verwenden. 7. Use of the file format according to one of claims 1 to 6 for storing and / or loading images and / or other data of an imaging system, in particular of a motor vehicle. Control unit for processing camera images obtained by means of an imaging system of a motor vehicle, characterized in that the control unit is adapted to use the file format according to one of claims 1 to 6 for storing and / or loading data, in particular camera images.
PCT/EP2005/012126 2004-12-03 2005-11-11 File format for the organisation of data and control appliance WO2006058606A1 (en)

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EP1227683A1 (en) * 1999-10-12 2002-07-31 Matsushita Electric Industrial Co., Ltd. Monitor camera, method of adjusting camera, and vehicle monitor system
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