• 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:
    The invention relates to electronic technology for the reproduction and manufacture of printing forms and improves the accuracy of the formation of the correction signal. The method consists in optoelectronic coupling. light beam of the original image and the formation of the image signal and the background signal surrounding the read point of the image. By subtracting the background signal from the image signal, a correction signal is generated. The correction of the image signal is carried out by summing the image signal and the correction signal at the moment when the light beam intersects the image contour. To increase the accuracy of the correction, the duration of the correction signal is changed by directly proportional changing the magnitude of the background and the corresponding change in the range of the duration of the corrected image signal by compressing or stretching it in accordance with the scale of the reproduced image. The method is explained by the operation of the device. 4 hp f-ly, 3 ill. WITH
    公开号:SU1431695A3
    申请号:SU823496754
    申请日:1982-10-01
    公开日:1988-10-15
    发明作者:Кноп Ханс-Георг
    申请人:Др.-Инж.-Рудольф Хелль,Гмбх (Фирма)；
    IPC主号:
    专利说明:


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    This invention relates to electronic technology for the reproduction and manufacture of printing forms.
    The purpose of the invention is to improve the accuracy of the formation of the correction signal. Figure 1 shows the aperture of the light beam on the original image of the contour line; Fig. 2 shows the form of the video signal when the light beam crosses the contour line of the image original; FIG. 3 is a structural electrical circuit of a device that implements a method for generating a correction signal during the reproduction of an original image.
    The method of forming the correction signal during the reproduction of the original image is carried out as follows.
    Optoelectronically reads the original image with a light beam (figoO, generates an image signal (Fig. 3), generates a background signal around the point to be matched, generates a correction signal by removing the background signal from the image signal and correcting the image signal by summing up the image signal and the correction signal at the moment the intersection of the koHTypa image with a light beam, change the strength of the correction signal by changing the magnitude of the background, 1 | sotora is directly proportional to the correction value of the correction signal, and the change is ragma 18 and the second diaphragm 19.
    40
    IOT range of correction duration | image signal by phgo compression (stretching) in accordance with the scale of the reproduced image.
    In this case, the product of the duration of the correction signal to the signal corresponding to the image scale is equal to a constant value.
    The background signal is generated by opt-e-reading the corresponding itiero background from the image points in the original image.
    The background signal is formed by averaging the values obtained by the pointwise values of the image signals corresponding to the background signals, and the product of the duration of the background signal by the signal corresponding to the scale of the image is equal to the magnitude.
    A device that implements the method of forming a correction signal during the reproduction of the original image
    50
    55
    The rotating drum 1 for reading the image from the original and rotating the drum 2 for reproducing the image move respectively from the first feed unit 3 relative to the reading optical-electronic unit 5 and the second feed block 4 relative to the playback unit 6. piecewise, the distance of the second lens 22 with a variable focal distance is varied by means of an execution unit 20, which projects the apron in various sizes (Fig. 1). The image signal (PC) (Fig. 3) from the first EIA 16 and the background signal (U) of the second EIA 17 arrive at the corresponding inputs of the correction unit 7, where the correction signal U is generated (Fig. 2, a-b). At the same time, the duration of time or the width of the addition depends on the size of the background area, which varies under the action of the control signal (the width of the action of the correction signal I can be controlled). About
    (Fig. 3), contains rotational drum 1 for reading the image from the original, rotating drum 2 for reproducing the image, first 3 and second 4 feed units, combining optical-electronic block 5, block 6 for reproducing, block 7 for signal correction, analog digital converter (A / D converter) 8,: memory block 9, digital-to-analog converter (DAL) 10, output amplifier 11, control block 12, first 13 and second 14 frequency dividers.
    An optoelectronic unit 5 with an image carrier contains a translucent mirror 15, a first optoelectronic converter (OEP) 16, a second optoelectronic converter 17, a first 18 and a second 19 aperture, an execution unit 20, a first 21 and a second 22 lenses with ne belt focal distance.
    The device works as follows.
    From the rotating drum 1 for reading the image from the original, the optical light beam is projected onto the reading optical-electronic unit 5, i.e. to the first and second OED 16 and 17 through the first lens 21, the translucent mirror 15 and the second lens 22 with a variable focal distance and the first lens respectively

    0
    five
    The rotating drum 1 for reading the image from the original and the rotating drum 2 for reproducing the image are moved respectively from the first feed unit 3 relative to the reading opto-electronic unit 5 and the second feed block 4 relative to the playback unit 6. The focal length, the distance of the second objective lens 22 with a variable focal length, is varied by means of an executive unit 20, which projects the aperture in various sizes (Fig. 1). The image signal (PC) (Fig. 3) from the first EIA 16 and the background signal (U) from the second EIA 17 arrive at the corresponding inputs of the correction unit 7, where the correction signal U is generated (Fig. 2, a-b). At the same time, the duration of time or width of the addition depends on the size of the background area, which varies under the action of the control signal (the width of the action of the correction signal I can be controlled). The outbreak
    The rendered image signal U (Fig. 2d) is converted into ADC 8 in digital form. From the output of ADC 8, a digital signal is fed to memory block 9. The shaded signals from memory block 9 are linked to a clock frequency sequence controlled respectively from the first and second frequency dividers 13 and 14. The output signal from memory block 9 is fed to playback unit 6 via serially connected D / A converters 10 and output amplifier 11. Playback unit 6 reproduces the original point-by-point and line-by-line according to the VII with the selected scale, increasing or decreasing the image on the recording media, for example, on film, located on the drum 2 to reproduce the image. The first and second blocks 3 and 4 of the filing, the first and second dividers 13 and 14 frequency up. are from control block 12.
    In this way, by varying the width of the action on the side of the match, they get independent of the actual scale of reproduction of the correction area of different width,
    ъ
    Formula of Invention
    权利要求:
    Claims (5)
    [1]
    1. A method of forming a correction signal during the reproduction of an original image, including; optoelectronic point-to-point readout of an original image by a light beam, image signal formation, formation of a background signal surrounding the point to be compared, formation of a correction signal by subtracting the background signal from the image signal and correcting signal image0
    50
    five
    ABOUT
    by summing the image signal and the correction signal at the time of intersection of the image contour with light when combining the original image, characterized in that, in order to increase the accuracy of forming the correction signal, after forming the correction signal, the duration of the correction signal is changed by changing the background value is proportional to the duration of the correction signal, and change the range of the duration of the corrected image signal by compressing it (stretching) in accordance with the scale om, reprodutsi Rui images.
    [2]
    2, Method POP1, characterized in that the product of the duration of the correction signal by the signal corresponding to the scale of the image is a constant value,
    [3]
    3. The method according to claim 1, wherein the background signal is generated by optoelectronic matching the corresponding background of the counted points of the image in the original image,
    [4]
    4, Method 1, characterized in that the background signal is generated by averaging the values obtained by point-by-point mixing of the values of the image signals corresponding to the background signals.
    [5]
    5. The method according to 1, characterized in that the product of the duration of the background signal by
    0 signal corresponding to the scale
    image is equal to the constant value
    I
    I 1
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    editor A.Lezhnina
    Compiled by V.Lapshov Tehred A. Kravchuk
    Order 5358/59
    Circulation 660
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Proofreader M. Maksimigaints
    Subscription
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2691696A|1950-10-27|1954-10-12|Eastman Kodak Co|Electrooptical unsharp masking in color reproduction|
    DE1039842B|1957-08-14|1958-09-25|Rudol Hell Dr Ing|Process for the artificial increase of contrast on tone value cracks and contours in clichés to be produced by means of electronic cliché machines|
    GB1206681A|1967-03-22|1970-09-30|Printing Dev Inc|Electronic reproduction of continuous image by half tone dots|
    US4122496A|1977-02-23|1978-10-24|International Business Machines Corporation|Apparatus and method for digital halftone reproduction|
    JPS611742B2|1977-08-05|1986-01-20|Dainippon Screen Mfg|
    JPS6142262B2|1979-05-02|1986-09-19|Dainippon Screen Mfg|
    US4403258A|1980-11-07|1983-09-06|Ringier & Co., Ag.|Method and device for sequentially imaging an original|
    JPH0310483Y2|1980-11-21|1991-03-15|
    US4437122B1|1981-09-12|1993-03-30|Xerox Corp|US4517599A|1983-01-27|1985-05-14|Hughes Aircraft Company|Resolution enhancement and zoom by degradation estimates|
    JPS6081972A|1983-10-12|1985-05-10|Canon Inc|Picture processing system|
    DE3373764D1|1983-11-14|1987-10-22|Hell Rudolf Dr Ing Gmbh|Method and apparatus for manufacturing screened printing forms|
    US4706128A|1983-12-14|1987-11-10|Canon Kabushiki Kaisha|Image reading and converting apparatus|
    JPH0242207B2|1984-02-02|1990-09-21|
    US4851922A|1984-02-29|1989-07-25|Canon Kabushiki Kaisha|Video signal processing apparatus|
    JPH0685556B2|1984-03-30|1994-10-26|大日本スクリ−ン製造株式会社|Magnification conversion method in image scanning recording apparatus|
    US5020118A|1984-06-13|1991-05-28|Canon Kabushiki Kaisha|Image reading apparatus|
    JPS61242466A|1985-04-19|1986-10-28|Ricoh Co Ltd|Image variable power system|
    JPH0620240B2|1985-06-04|1994-03-16|大日本スクリーン製造株式会社|Image signal generator|
    FR2591367A1|1985-12-06|1987-06-12|Canon Kk|Image data processing apparatus|
    JPH055432B2|1986-12-19|1993-01-22|Dainippon Screen Mfg|
    EP0276337B1|1987-01-24|1989-11-29|Dr.-Ing. Rudolf Hell GmbH|Aperture stop arrangement for the optoelectronic scanning of documents|
    DE4107703C2|1991-03-09|1994-07-21|Hell Ag Linotype|Method and device for recording rasterized images|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP81108501A|EP0077410B1|1981-10-19|1981-10-19|Contrast enhancement method|
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