WO2010133393A2 - Appareil d'enregistrement optique pour l'enregistrement d'une image - Google Patents

Appareil d'enregistrement optique pour l'enregistrement d'une image Download PDF

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Publication number
WO2010133393A2
WO2010133393A2 PCT/EP2010/054373 EP2010054373W WO2010133393A2 WO 2010133393 A2 WO2010133393 A2 WO 2010133393A2 EP 2010054373 W EP2010054373 W EP 2010054373W WO 2010133393 A2 WO2010133393 A2 WO 2010133393A2
Authority
WO
WIPO (PCT)
Prior art keywords
image
image information
spectral range
light
optical recording
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.)
Ceased
Application number
PCT/EP2010/054373
Other languages
German (de)
English (en)
Other versions
WO2010133393A3 (fr
Inventor
Jörg Erich SORG
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.)
Ams Osram International GmbH
Original Assignee
Osram Opto Semiconductors 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 Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
Publication of WO2010133393A2 publication Critical patent/WO2010133393A2/fr
Publication of WO2010133393A3 publication Critical patent/WO2010133393A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H04N23/20—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only
    • 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
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means

Definitions

  • an optical recording apparatus for recording an image.
  • a method of recording an image is further provided.
  • An object to be solved is to specify an optical recording device with which particularly high-contrast images can be recorded.
  • the optical recording device is, for example, a mobile telephone with camera, a so-called camera phone, a digital camera or a similar, portable device.
  • the optical recording apparatus comprises an image sensor.
  • the image sensor is, for example, a CCD (charge-coupled device) image sensor.
  • the image sensor of the optical recording apparatus is suitable for detecting electromagnetic radiation from the spectral range of infrared radiation and visible light.
  • Image sensor is preferably adapted to detect electromagnetic radiation from the wavelength range of about 400 nm to about 1 micron. That is, by means of the image sensor image information from the spectral range for infrared radiation and the spectral range for visible light can be determined. This image information can then be stored, for example, in a memory and further processed.
  • the optical recording apparatus comprises a first flashlight.
  • the first flash is suitable for emitting electromagnetic radiation from the spectral range of infrared radiation during operation. That is, in operation, the flashlight radiates electromagnetic radiation comprising infrared radiation, preferably from the near-infrared region with wavelengths ⁇ 1 micron.
  • the first flash light may additionally emit electromagnetic radiation from the spectral range of visible light, such as red light or even white light.
  • electromagnetic radiation from the spectral range of visible light such as red light or even white light.
  • the first flash light it is also possible for the first flash light to emit only electromagnetic radiation from the spectral range of infrared radiation.
  • the maximum of the intensity of the electromagnetic radiation emitted by the first flash light is preferably in the infrared range.
  • the first flash light comprises at least one light-emitting diode chip which is suitable for emitting electromagnetic radiation from the spectral range of infrared radiation during operation.
  • the light-emitting diode chip is that component of the first flashlight which generates the infrared radiation emitted by the first flashlight during operation.
  • the maximum of the intensity, that is the peak wavelength - the electromagnetic radiation emitted by the light-emitting diode chip lies in the infrared range.
  • the first flashlight may comprise one or more light-emitting diode chips which are suitable for emitting electromagnetic radiation from the spectral range of infrared radiation during operation.
  • the first flash additionally comprises one or more light-emitting diode chips which are suitable for emitting electromagnetic radiation from the spectral range of visible light.
  • the first flash light may be suitable, for example, for generating red light or white light.
  • the first flash light it is also possible for the first flash light to comprise only light-emitting diode chips which emit electromagnetic radiation from the spectral range of infrared radiation.
  • the light-emitting diode chips of the flash light then emit no or hardly any electromagnetic radiation from the visible range.
  • "Hardly electromagnetic radiation from the visible range” means that electromagnetic radiation from the visible range makes up at most 10% of the intensity of the electromagnetic radiation emitted by the light-emitting diode chip during operation.
  • the recording device comprises an image sensor which is capable of detecting electromagnetic radiation from the spectral range of
  • Infrared radiation and visible light is suitable and a first flash, which is suitable to emit during operation electromagnetic radiation from the spectral range of infrared radiation.
  • the first flash light comprises at least one light-emitting diode chip which is suitable for emitting electromagnetic radiation from the spectral range of infrared radiation during operation.
  • the recording apparatus comprises a second flashlight suitable to emit white light during operation.
  • the second flash light can comprise at least one light-emitting diode chip.
  • the second flash light comprises a light-emitting diode chip which generates blue light during operation. Part of the blue light can be converted to yellow light by wavelength conversion, for example, and mixed with the blue light. In this way, white mixed light can be generated.
  • the second flash light comprises a light-emitting diode chip which is suitable for generating electromagnetic radiation in the spectral range of UV radiation.
  • Lumineszenzkonversionsstoffen which are arranged downstream of the LED chip, can be generated from the UV radiation white light by wavelength conversion.
  • the second flash light may comprise three light-emitting diode chips, for example a blue, a red and a green light-emitting light-emitting diode chip whose light mixes into white light during operation.
  • These light-emitting diode chips can also be operated sequentially in rapid succession, so that the emitted light mixes to white light for the human observer.
  • the second flash is a flash that does not
  • LED chip has, but is formed for example by a discharge lamp.
  • the optical recording device has a second flashlight which is suitable for emitting white light during operation
  • the first flashlight is preferably used exclusively for electromagnetic radiation from the spectral range of Infrared radiation emits, so little or no visible light.
  • the recording apparatus comprises a housing having a recess in which the first flashlight is arranged.
  • the housing may be formed with a plastic material or a metal.
  • the housing has a recess, that is, for example, a recess which is suitable for receiving the first flash light, that is, for example, an infrared light-emitting diode.
  • the recording device comprises a cover plate which covers the recess and in particular terminates flush with an outer surface of the housing.
  • the arranged in the recess first flash light is covered with the cover plate.
  • the cover plate preferably closes both in the lateral direction, ie in directions parallel to the main extension plane of the cover plate, as well as in the vertical direction, so for example perpendicular to the main extension plane of the cover plate, flush with the
  • “Flush complete” also includes such embodiments in which the cover plate the outer surface of the housing only slightly surmounted or only slightly surmounted by the outer surface of the housing. For example, the cover plate is flush even with the outer surface of the housing, when the cover plate projects beyond the outer surface in the vertical direction by at most 10% of the thickness of the cover plate or surmounted by the outer surface.
  • the cover plate is for electromagnetic radiation from the spectral range of infrared radiation, that is, for the electromagnetic generated by the first flash during operation Radiation, permeable. That is, the cover plate hardly absorbs the electromagnetic radiation emitted from the first flashlight during operation. In other words, at least 60%, preferably at least 75% of the emitted infrared radiation passes through the cover plate without being absorbed by the cover plate.
  • the cover plate may be impermeable or diffusely scattering. Due to the cover plate, the first flashlight from the outside by the human observer is preferably not visible.
  • the cover plate preferably has the same color as the housing on its outer surface. For example, if the housing is black, then it will appear as well
  • Cover plate black The color of the cover plate and housing, as well as other surface properties, such as reflectivity of the cover plate and the housing, can differ slightly from each other for manufacturing reasons. At some distance, for example, at a distance of ⁇ 25 cm, the viewer, however, visually no difference between the outer surface of the housing and the cover plate detectable.
  • the recording device described here is based, inter alia, on the following idea: If the recording device comprises a first flashlight emitting infrared radiation as the flashlight source, a second flashlight emitting white light can be made smaller in its area and / or a light output than this without first
  • Flash would be the case.
  • This smaller, second flashlight can be visually inconspicuous integrated into the housing of the recorder, as this without first Flash would be the case. Due to the lower light output of the smaller second flash light resulting from the small size, for example, the flash light is not perceived as disturbing during photography. Moreover, it is possible to completely dispense with the second flashlight emitting white light or not to operate it when photographing. Both reduce the perceived as disturbing effect of the white flash.
  • the first flashlight illuminates the object to be illuminated, however, very bright and homogeneous, without the lighting, for example, can be recognized by the human observer.
  • the first flash can also be arranged by means of the cover plate in the housing so that it is not visible from the outside.
  • the cover plate is suitable for beam shaping of the electromagnetic radiation emitted by the first flashlight during operation.
  • the first cover plate acts, for example, as an optical lens, which distributes the electromagnetic radiation emitted by the first flashlight uniformly over a surface.
  • the cover plate can be designed for this purpose, for example, in the manner of a Fresnel lens.
  • the first flash light additionally or alternatively comprises one or more optical elements which are arranged in the recess of the housing.
  • the cover plate itself is preferably planar or follows in its shape the contour of the outer surface of the housing.
  • the recording apparatus comprises a control device that is suitable first and second Flashlight to operate at the same time and at different times. That is, it is possible that first and second flashes are fired simultaneously. The illuminated object is then illuminated with both white light and infrared radiation. Furthermore, it is also possible that only the first or only the second flashlight be used to illuminate the object or the flashlights are operated sequentially.
  • the optical recording device comprises an evaluation circuit.
  • the evaluation circuit is, for example, a microprocessor which is provided for processing image information.
  • the evaluation circuit is suitable for superimposing a first image information from the spectral range of infrared radiation detected by the image sensor with a second image information from the spectral range of visible light detected by the image sensor to form an image.
  • First and second image information can be determined simultaneously or in rapid succession sequentially by the image sensor and stored in a memory, for example in a memory associated with the evaluation circuit.
  • the evaluation circuit then combines the image information to calculate an image.
  • the faint image information from the spectral range of visible light is used to colorize the image
  • the intense and high-contrast image information from the spectral range of infrared radiation is used to represent the image, eg contour, contrast and sharpness.
  • the result is a sharp, bright image with natural colors.
  • the first image information from the spectral range of infrared radiation is used to increase the sharpness, in particular the edge sharpness of the image.
  • the evaluation circuit by means of a
  • Edge filter method determine the edges of the recorded objects from the first image information.
  • the first image information from the spectral range of infrared radiation is used to increase the contrast of the image.
  • the contrast information obtained from the first image information can be used to determine the contrasts in the composite image.
  • the second image information from the spectral range of visible light is used for coloring the image. It is thus possible, for example, that only the colors of, for example, the pixels of the image to be generated are determined from the second image information. By means of the first image information, each pixel can then be assigned a specific brightness value. Furthermore, it is possible that the first image information for methods of the
  • Image editing such as an edge filtering to increase the edge sharpness, is used.
  • the optical recording device can be created by superimposing an infrared image with an image from the visual field, a bright and sharp image that is colored in natural colors. Furthermore, in the described recording device, a particularly small and / or faint white light emitting second flashlight use or a white flash can be completely dispensed with.
  • a method of recording an image is further provided.
  • the method of recording an image may be performed, for example, with an optical recording apparatus described herein. That is, the features described for the optical recording apparatus are also disclosed for the method and vice versa.
  • the method comprises the steps:
  • At least partially means that not the complete information from the infrared frame and the frame from the visible area must be used, but it is also possible that only partial information to form the superimposed image use.
  • the first image information can only be used to determine the edges and thus increase the edge sharpness in the image, other properties, such as contrast values, can then be disregarded.
  • the overall picture includes both picture information completely.
  • the first and the second image information are detected simultaneously.
  • an image sensor provided for determining the image information may be configured to display image information from the infrared spectral range to the
  • At least two image sensors are used which detect the first and second image information at the same times, wherein the first image sensor detects the first image information and the second image sensor detects the second image information.
  • the first and the second image information are acquired sequentially, that is, in succession in succession.
  • an image sensor provided for determining the image information may be configured to sequentially acquire image information from the infrared spectral range to the spectral range of visible light.
  • a filter can be used, which is tuned to the electromagnetic radiation emitted by the first flashlight. The filter then preferably leaves the infrared radiation generated by the first flash light to the image sensor. Electromagnetic radiation from the spectrum of visible light is then not transmitted upon detection of the first image information.
  • the first and second strobes may be sequentially operated, and the generation of the respective strobe light is synchronized with the detection of the associated first and second image information.
  • the first image information is used to increase the sharpness, in particular the edge sharpness of the image.
  • the first image information is used to increase the contrast of the image.
  • the first image information is used to increase the sharpness and to increase the contrast of the image.
  • the second image information is used for coloring the image.
  • FIG. 1A shows a recording device described here in a schematic plan view
  • Figure IB shows a section through the recorder along section line A-A '.
  • the optical recording device 1 comprises a housing 11.
  • the housing 11 is, for example, a housing formed from a colored plastic material.
  • an image sensor 2 is integrated, which is suitable for the detection of electromagnetic radiation from the spectral range of infrared radiation and visible light.
  • a first image information 91 from the spectral range of infrared radiation and a second image information 91 from the spectral range of visible light can be determined, for example, simultaneously or sequentially and stored for detection.
  • the housing 11 has a recess 4.
  • the first flash 3 is arranged, which in the present case is designed as an infrared light emitting diode, which includes an infrared light emitting diode chip 31.
  • the first flashlight 3 therefore generates infrared radiation from the near-infrared region.
  • the recess 4 and thus also the first flashlight 3 are covered by a cover plate 6, which terminates flush with an outer surface IIa of the housing 11.
  • the cover plate 6 is permeable to the infrared radiation emitted by the first flashlight 3 during operation. It has the same color as the housing 11, so that in the plan view of the recording apparatus 1, as shown in Figure IA, the first flash 3 hardly or not at all to recognize.
  • the recording device 1 1, a second
  • Flash light 5 include, which can be formed due to the first flash light 3 comparatively small and / or faint.
  • the second flash 5 is suitable for generating white light.
  • the white light of the second flash 5 is thereby generated, for example, by mixing blue light and converted yellow light.
  • a luminescence conversion material is used, which can be arranged, for example, on the radiation exit surface of a blue light-emitting LED chip.
  • the light-emitting diode, that is to say the light means, of the second flashlight 5 may appear yellowish due to the luminescence conversion material if the second flashlight 5 is not operated. This color impression is often perceived as disturbing.
  • measures can be used, however, which reduce the light intensity of the second flash light 5.
  • the luminescence conversion material may be followed by a diffuser that appears white. Further, it is possible to hide the luminescence conversion material by mirrors or other optical elements. The resulting Reduction of the light intensity of the second flash light 5 can be compensated by means of the first flashlight 3.
  • the one flash 3 for example, an infrared light emitting diode is used, the one
  • Infrared LED chip 31 having an area of the radiation exit surface of at least 0.75 mm 2 , preferably of at least 1 mm 2 .
  • the peak wavelength of the emitted electromagnetic radiation is between 800 nm and 1100 nm, for example at 850 nm or 940 nm.
  • the peak wavelength is preferably between 830 nm and 870 nm, for example at 850 nm.
  • the image sensor 2 can be found in these Wavelengths are designed to be particularly sensitive.
  • the brightness phi_e of the first flashlight 3 is for example at least 400 mW, for example 500 mW for a surface area of the radiation exit area of 1 mm 2 , the chip being operated at a current of 1.0 A and at a voltage of 1.8V ,
  • FIG. 2 schematically illustrates the interconnection of the components of the optical recording device 1, as described in FIGS. 1A, 1B, by means of a schematic circuit diagram.
  • the first flashlight 3 and optionally the second flashlight 5 are connected to a control device 7 which can operate first flashlight 3 and second flashlight 5 simultaneously or at different times. Synchronously with the generation of a flashlight by at least one of the two flashlights 3, 5, the control device 7, the image sensor 2 for determining first image information 91 and second image information 92 to drive.
  • Evaluation circuit 8 is connected at least to the image sensor 2. For example, the determined image information stored in the memory of the evaluation circuit 8 and further processed there to produce an image 9.
  • an exemplary embodiment of a method for recording an image 9 is shown schematically.
  • a first image information 91 with electromagnetic radiation from the infrared spectral range is determined.
  • This image information is used, for example, to determine the edges of the recorded objects, see FIG. 3A.
  • the second image information 92 contains, for example, the color information of the objects which is determined from the spectral range of visible light.
  • first image information 91 and second image information 92 are superimposed on an image in which sharply edged objects with the natural colors are colored.
  • the method described can also be carried out without the use of flashlights, for example if the illumination by a light source, which infrared radiation and electromagnetic
  • Radiation in the visible spectral range provides sufficient, is given. That is, for example, in daylight, the method can also be performed without using an infrared flash or a visible light flash. The recorder then does not necessarily need a first and / or a second flash.
  • the invention is not limited by the description based on the embodiments of these. Rather, the invention encompasses any novel feature as well as any combination of features, including in particular any combination of features in the claims, even if this feature or combination itself is not explicitly stated in the patent claims or exemplary embodiments.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Head (AREA)
  • Studio Devices (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

L'invention concerne un appareil d'enregistrement optique (1) permettant d'enregistrer une image (9) et comprenant un détecteur d'image (2) qui convient pour la détection du rayonnement électromagnétique appartenant au domaine spectral du rayonnement infrarouge et de la lumière visible, et un premier flash (3) apte, lorsqu'il est en marche, à émettre un rayonnement électromagnétique appartenant au domaine spectral du rayonnement infrarouge, ledit premier flash (3) comportant au moins une puce LED (31) apte, lorsqu'elle est en marche, à émettre un rayonnement électromagnétique appartenant au domaine spectral du rayonnement infrarouge, l'intensité maximale du rayonnement électromagnétique émis par la puce LED (31) se trouvant dans le domaine spectral du rayonnement infrarouge.
PCT/EP2010/054373 2009-05-18 2010-03-31 Appareil d'enregistrement optique pour l'enregistrement d'une image Ceased WO2010133393A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009021721.5 2009-05-18
DE102009021721A DE102009021721A1 (de) 2009-05-18 2009-05-18 Optisches Aufzeichnungsgerät zur Aufzeichnung eines Bildes

Publications (2)

Publication Number Publication Date
WO2010133393A2 true WO2010133393A2 (fr) 2010-11-25
WO2010133393A3 WO2010133393A3 (fr) 2011-03-03

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PCT/EP2010/054373 Ceased WO2010133393A2 (fr) 2009-05-18 2010-03-31 Appareil d'enregistrement optique pour l'enregistrement d'une image

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DE (1) DE102009021721A1 (fr)
WO (1) WO2010133393A2 (fr)

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FR2763720B1 (fr) * 1997-05-21 1999-07-16 Sagem Capteur optique d'empreinte digitale a eclairage impulsionnel
EP1068607A4 (fr) * 1998-04-03 2009-07-08 Image Guided Technologies Inc Instrument d'optique sans fil de mesure de position et procede d'utilisation associe
US20020171754A1 (en) * 2001-05-18 2002-11-21 I-Jen Lai Digital camera with multi-illuminating source
DE10305009A1 (de) * 2003-02-07 2004-09-02 Robert Bosch Gmbh Vorrichtung und Verfahren zur Bilderzeugung
JP2006013884A (ja) * 2004-06-25 2006-01-12 Fuji Photo Film Co Ltd カメラ
JP2008504698A (ja) * 2004-06-30 2008-02-14 オスラム　オプト　セミコンダクターズ　ゲゼルシャフト　ミット　ベシュレンクテル　ハフツング 発光ダイオード装置、光学式記録装置および少なくとも１つの発光ダイオードをパルス状に作動させる方法
US7457477B2 (en) * 2004-07-06 2008-11-25 Microsoft Corporation Digital photography with flash/no flash extension
DE102004051379A1 (de) * 2004-08-23 2006-03-23 Osram Opto Semiconductors Gmbh Vorrichtung für ein optoelektronisches Bauteil und Bauelement mit einem optoelektronischen Bauteil und einer Vorrichtung
JP4534756B2 (ja) * 2004-12-22 2010-09-01 ソニー株式会社 画像処理装置、画像処理方法、撮像装置、プログラム、及び記録媒体
TWI268398B (en) * 2005-04-21 2006-12-11 Sunplus Technology Co Ltd Exposure controlling system and method thereof for image sensor provides a controller device driving the illuminating device to generate flashlight while each pixel row in subsection of an image is in exposure condition
JP4265600B2 (ja) * 2005-12-26 2009-05-20 船井電機株式会社 複眼撮像装置
JP2008182360A (ja) * 2007-01-23 2008-08-07 Funai Electric Co Ltd 皮膚領域検出撮像装置

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Title
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Publication number Publication date
WO2010133393A3 (fr) 2011-03-03
DE102009021721A1 (de) 2010-11-25

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