• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A DEVICE FOR REPRESENTATIVE DUKSCH1I ORIGINALS containing an original carrier optically coupled to a reading unit consisting of a series-connected optoelectronic converter and an image signal amplifier whose output is the output of a reading unit, and the control input of the photoelectric converter or image signal amplifier is a control the input of the reading unit, while the output of the reading unit is connected to a recording unit optically coupled to the recording medium and to the input of the set unit The signal level, the output of which is connected to the control input of the readout block, is characterized in that, in order to improve the image quality of the reproduced originals, the signal level setting unit contains a series-connected comparator and voltage generator, a stabilized voltage source is also input, the output (L which is connected to the second input of the comparator, while the input of the comparator is the input of the signal level setting unit, and the output of the voltage generator is the output of the unit Settings signal level. with; about 00 Sd SAE
    公开号:SU1099853A3
    申请号:SU782664499
    申请日:1978-09-14
    公开日:1984-06-23
    发明作者:Хоффрихтер Инго；Кноп Ханс-Георг
    申请人:Др-Инж Рудольф Хелль,Гмбх (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the field of image acquisition, namely, devices for the reproduction of a black and white image. A device for reproducing images is known, which contains an original carrier optically coupled to a matching unit consisting of optoelectroinoes connected in series. The image converter and amplifier, the output of which is with the output of the reading unit, and the control input of the optoelectronic converter or image signal amplifier is the control input of the reading unit, while the output of the reading unit is connected to the recording unit optically connected recording medium, and to the input of the signal level setting unit, the output of which is connected to the control input of the readout unit lj, However, the known device does not provide high quality reproduced images razheny. The purpose of the invention is to improve the image quality of reproduced originals. For this purpose, in the device for reproduction of originals, containing the carrier of originals, optically connected with a reading unit, consisting of a series-connected optoelectronic converter and image signal descender, the output of which is the output of the reading unit, and the control input of the optoelectronic converter or signal amplifier the image is the control input of the reading unit, while the output of the reading unit is connected to the recording unit optically connected to the recording medium and to the input the signal level setting unit, the output of which is connected to the control input of the reading unit, the signal level setting unit contains the comparator and voltage generator entered and connected in series, and a stabilized voltage source is input, the output of which is connected to the second input of the comparator, and the input the comparator is the input of the signal level setting unit, and the output of the voltage generator is the output of the installation unit of the signal. The drawing shows a structural electrical circuit of the device for the reproduction of originals. The proposed device contains an original carrier 1, reading a block 2, an opto-electronic converter 3, image signal amplifier 4, a recording block 5, a recording medium 6, a signal level setting block 7, a comparator 8, a voltage generator 9, a stabilized voltage source 10, and also a logarithmic unit 11, a correction unit 12, and a final amplifier 13. The device for reproducing originals operates as follows. The original carrier 1 for receiving a video signal is alternately deployed by a reading unit 2, which contains a series-connected optoelectronic converter 3 and an image signal amplifier A, from the output of which the video signal is fed to a recording unit 5 optically connected to the recording medium 6. For setting the white signal level, a signal level setting unit 7 is provided, the input of which is connected to the output of the amplifier 4 image signals and is the output of the reading unit 2, and the output of the signal level setting unit 7 is connected to the control input of the optoelectronic converter 3 and is the input of the reading unit 2. The actual value of the video signal from the output of the image signal amplifier 4 is fed to the input of the comparator 8, which is the input of the signal level setting unit 7, and from the output of the comparator 8 to the gene input Ator 9 voltage, the output of which is the output of block 7 setup signal level. At the same time, the source 10 of the stabilized voltage supplies the setpoints to the second input of the comparator 8. For irregular voltages at the inputs of the comparator 8, the voltage generator 9 outputs a constantly varying voltage as a control signal. This control voltage affects the mode of operation of the optoelectronic converter 3. At equal voltages at the inputs of the comparator 8, the instantaneous values of the control signal voltage are fixed and stored during reproduction, therefore, the mode of operation of the optoelectronic converter is unchanged.
    In this case, the control signal can also be supplied to an amplifier D of the image signal.
    The video signal is fed through a logarithmic unit 11, a correction unit 12, and a final amplifier 13 to the input of the recording unit 5, which records on the recording medium 7 in lines and points by exposure.
    The proposed device for the reproduction of originals allows you to automatically adjust the voltage of the video signals to white or black levels, which increases the quality of the reproduced original.
    权利要求:
    Claims (1)
    [1]
    DEVICE FOR REPRODUCTION OF ORIGINALS, comprising an original carrier optically coupled to a reading unit consisting of a series-connected optoelectronic converter and an image signal amplifier, the output of which is the output of the reading unit, and the control input of the optoelectronic converter or image signal amplifier is the control input of the reading unit, this, the output of the reading unit is connected to the recording unit, optically connected with the recording medium, and to the input of the installation unit signal level, the output of which is connected to the control input of the reading unit, characterized in that, in order to improve the image quality of reproduced originals, the signal level setting unit contains the comparator and voltage generator entered and connected in series, and a stabilized voltage source is introduced, the output of which is connected to the second input of the comparator, while the comparator input is the input of the signal level setting unit, and the output of the voltage generator is the output of the level setting unit signal.
    >
    ί 1099853 2
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR2328337B1|1980-08-14|
    JPS6229946B2|1987-06-29|
    DE2545961A1|1977-04-21|
    DE2545961B2|1979-05-10|
    SU1122245A3|1984-10-30|
    JPS59191968A|1984-10-31|
    CH622110A5|1981-03-13|
    US4136360A|1979-01-23|
    DE2545961C3|1983-12-15|
    GB1541578A|1979-03-07|
    JPS639422B2|1988-02-29|
    JPS5248909A|1977-04-19|
    FR2328337A1|1977-05-13|
    引用文献:
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    DE2351986A1|1972-11-03|1974-05-16|Philips Nv|CIRCUIT ARRANGEMENT FOR A RECORDING DEVICE WITH A STRUCTURE OF DISCRETE RECEIVING ELEMENTS|
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    US4661859A|1981-06-03|1987-04-28|Xerox Corporation|Pulse width modulation greyscale system for halftone printer|
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    JPS60224370A|1984-04-23|1985-11-08|Canon Inc|Color picture reading device|
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    JPS6262663A|1985-09-12|1987-03-19|Dainippon Screen Mfg Co Ltd|Stabilizing method for sharpness emphasizing effect|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2545961A|DE2545961C3|1975-10-14|1975-10-14|Device for producing corrected color separations|
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