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
  • H04N23/80—Camera processing pipelines; Components thereof
  • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
  • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
  • H04N25/61—Noise processing, e.g. detecting, correcting, reducing or removing noise the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4"
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
  • H04N25/70—SSIS architectures; Circuits associated therewith
  • H04N25/702—SSIS architectures characterised by non-identical, non-equidistant or non-planar pixel layout

Definitions

• the invention relates to a digital camera device and a method and a computer program for its production.
• Digital camera devices for recording an object are known in principle from the prior art.
• Such camera devices usually include a lens device for receiving and transmitting light, which represents the object.
• they comprise a light sensor device with a multiplicity of flatly arranged pixel elements, the pixel elements being distributed uniformly over the surface, that is to say their density distribution is constant over the surface of the light sensor device.
• Each pixel element generates a signal which represents the brightness of the light transmitted from the lens device to the respective pixel element.
• the camera device comprises an image generation device for generating an image signal, which represents the recorded object, from the multiplicity of the pixel signals.
• camera devices of this type are used to recognize the surroundings of a vehicle, they are usually designed in such a way that the greatest possible viewing angle can be seen with them.
• This largest possible viewing angle has traditionally been achieved by designing the lens device with a very small focal length.
• the short focal length has the disadvantage that it is associated with a distortion effect, the so-called fisheye effect.
• the distortion caused by this distortion effect in the image of a recorded object is all the greater, ever the focal length is smaller.
• the solution for the camera device described in the introduction is such that the size of the density of the pixel elements in their flat arrangement in the light sensor device is determined in accordance with the size of the focal length of the lens device.
• Density of pixel elements in the sense of the invention means the number of pixel elements per unit area.
• the proposed determination of the size of the density of the pixel elements over the surface of the sensor device advantageously brings about a correction of a distortion of image information caused by the lens device. It represents a hardware correction and makes a software-based, that is to say arithmetic, correction in the image processing in the image generation device that was previously carried out unnecessary.
• the claimed digital camera device is at least partially designed as a complementary symmetry metal oxide semiconductor CMOS or as a charge-coupled device CCD imager chip.
• the above object of the invention is further achieved by a method and • computer program for making a digital camera device and in particular a light sensor means.
• Figure 1 shows the structure of a digital camera device
• Figure 2 shows a first embodiment for the inventive design of the light sensor device
• Figure 3 shows a second embodiment for the inventive design of the light sensor device.
• FIG. 1 shows the basic structure of a digital camera device 100.
• the camera device 100 is used to recognize an object 200, in particular in the vicinity of a vehicle.
• it comprises a lens device 110 for receiving and transmitting light, which represents the object 200.
• the lens device 110 is a lens.
• the light passed on by the lens device 110 falls on a light sensor device 120, which has a multiplicity of flatly arranged pixel elements 122-1... - N. Each of these pixel elements, when active, generates a pixel signal which represents the brightness of the light incident on the respective pixel element.
• the pixel signals are received and processed by an image generation device 130 connected downstream of the light sensor device 120, in order to finally generate an image signal from the plurality of pixel signals, which represents the recorded object 200.
• the image signal is preferably stored in a memory device 140 assigned to the camera devices 100.
• the light sensor device 120 is designed such that the size of the density of its pixel elements is determined in accordance with the size of the focal length of the lens device 110. Specifically, this means that with a smaller focal length the density of the pixel elements is lower than with larger focal lengths and vice versa.
• the geometric shape of the lens device or its refractive index should also be taken into account in order to optimize the distribution of the density of the pixel elements over the surface.
• FIG. 2 shows a first exemplary embodiment for such an embodiment of the light sensor device 120 according to the invention and in particular its pixel distribution. It shows a convex lens device 110 in which the light rays transmitted to the pixel elements 122-1... -N diverge. In the case of lens devices 110 designed in this way, the distortion effect manifests itself in the fact that the image would be widened. It is therefore proposed according to the invention that the distance between adjacent pixel elements 120-1... -N is increased in accordance with the widening, that is to say the density of the pixel elements is reduced accordingly.
• FIG. 3 shows a second exemplary embodiment for the design of the light sensor device 120 according to the invention.
• the light rays falling on the pixel elements 122-1... - N converge.
• the distortion effect then manifests itself in the fact that the image of the object 200, which in this case is imaged on the pixel elements, is compressed. It is therefore recommended in this case to reduce the spacing of the pixel elements 122-1... -N from one another in accordance with the compression, that is to say to increase the density of the pixel elements accordingly.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Studio Devices (AREA)
• Transforming Light Signals Into Electric Signals (AREA)
• Solid State Image Pick-Up Elements (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=33394792

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Family Cites Families (5)

• 2003
  • 2003-05-16 DE DE10323672A patent/DE10323672A1/de not_active Withdrawn
• 2004
  • 2004-04-23 WO PCT/EP2004/004303 patent/WO2004102952A1/de active Application Filing
  • 2004-04-23 CN CN200480013399.1A patent/CN1792089A/zh active Pending
  • 2004-04-23 EP EP04729056A patent/EP1625743A1/de not_active Withdrawn
  • 2004-04-23 JP JP2006529702A patent/JP2007511921A/ja not_active Withdrawn
  • 2004-04-23 US US10/556,503 patent/US20060256227A1/en not_active Abandoned

Non-Patent Citations (1)

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