• 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 color correction technique is disclosed in which standardized color correction signals are stored in an addressable memory which emits a plurality of digitalized trichromatic picture scanning values as input values in a corresponding plurality of corrected picture recording signals as output values. An assignment of memory input to memory output is fed into the memory as standardized color correction data before reproduction. For a location to be specially corrected, the color signals thereof are measured and compared with predetermined values and a difference formation is provided between the memory output signals and the predetermined values, the difference values being stored and utilized, in connection with distance calculations of neighboring points, to input re-corrected color correction values into the addressable memory.
    公开号:SU993837A3
    申请号:SU792838859
    申请日:1979-11-06
    公开日:1983-01-30
    发明作者:Веллендорф Клаус
    申请人:Др.Инж.Рудольф Хелль,Гмбх (Фирма)；
    IPC主号:
    专利说明:

    correction of any area of the original. This goal is achieved by the fact that the additional correction of the selected image area is carried out according to the coordinates of the points lying inside the specified area, and the additional correction values are calculated for each point of the specified area, continuously decreasing from the central point to its border, and they replace the values of the standard values corrections in the storage unit; in this case, before reproducing the image, the corrected values of the output signals of the storage unit are measured and converted according to E values of additional correction, departing from which is defined as the difference values between the setpoint correction and further the measured values of output signals Adj bath and stored. Additional correction is carried out on the coordinates of the points according to the Gauss function. Additional image correction is not carried out in cylindrical coordinates. The display and comparison blocks, three additional memory blocks, an adder, a logic circuit, an address memory block, address increment and evaluation circuits, a counter, a clock generator, a second key and a distance calculator are entered into the device. at that, the outputs of the storage unit are connected to the inputs of the display unit, the outputs of the display unit are connected via a second key to the inputs of the first additional storage unit, one output of which is is connected to the input of the adder, and the second output is connected via a third key to one of the inputs of the comparison unit, the second input of the comparison unit is connected to the output of the second additional storage unit connected to the input of the specified additional correction values, the output of the comparison unit is connected to the input of the third additional storage a block whose output is connected to an input of a logic circuit connected by an output to an input of an adder, an output of an adder is connected via a fourth key to an input of a storage unit, and the output is analog-digital reobrazovatel th through the first key and the fifth key, the kinematic joint with a second key associated with vhoom address storage unit, whose output is connected dynes vhoom skhemy.uvelicheni with addresses, and the other. The output of the address increase is connected to the output of the counter, whose input is connected to the output of the clock generator, the output of the circuit. The increase of the address is connected to the inputs of the storage unit and the distance calculator, the output of which is connected to the input of the distance estimation circuit, the output of which is connected to the input of the circuit evaluation, and the output of the evaluation circuit is associated with one of the inputs of the logic circuit. In FIG. 1 shows the principle of the device; in fig. 2 color space, cut; in fig. 3 some numerical values for the course of correction in the color space; in fig. k - examples of weight correction function. From the reading unit 1, the image reading data is shown) in the form of trichromatic primary measured chroma signals R, G, B {R - red, G - yellow, B - blue) through a logarithmic converter 2, analog converter) -digit (not shown), which converts the R, G, B signals or the converted R, G, B signals into the X, Y, Z address signals, and through the key 3 is entered into the input register of the memory device 5 of the color correction. Before the reproduction, color correction data is entered into this memory 5, for example, on a floppy disk 6 (floppy disk) / and the address counter 7 counts for the increase and the data is recorded in the memory 5. If you want to work with a standard correction, then in the course of operation, the storage device 5 converts the input signals R, 6, V via addresses X, Y, Z into corrected output signals mg or su, or ye, or 3W. At the same time, the corrected output signals go through the 8 g output register to the playback unit (not shown) for the images in individual colors {simultaneously, or one by one. To make a local correction of the standard correction, before reproducing the operator sends optics (not is shown) of a reading device in place of ori gia crille, subjected to the desired partial correction. If the key 3 is closed, then the R, G, 8 color read information, having passed through the logarithmic converter 2 after being converted from analog to digital, gets, as X, Y and Z addresses, to the input of the 5B storage device of the output register 8 of the storage device 5, the corrected chrominance signals of the standard color correction belonging to the input addresses, which correspond to the image points on which the device is pointing, are located: These signals are indicated by instruments 9-12 calibrated in a color map ratio or percentage of raster point. The operator sees whether the values correspond to the desired density values or not. IF there is a deviation, the operator presses the button that triggers keys 3 AND 3, -. And 3. and the input addresses y .. Y, Z, as well as the output values mg, su, ye, in memory. A memory device 13 is provided for the input SW of the addresses, and a memory device rt for the output values. Then, using the keyboard 15, given values of mg, su, ye, SW are entered into a memory device 16 of predetermined values. With the aid of the comparison device 17, the difference between the specified values and the actual output values stored in the storage device 14, which is stored in the storage device 18, is determined. Since the correction should preferably take place not at one point, but also in the preassigned area the color space, the correction information for the neighboring points at the point chosen by the operator, the correction values for which should be changed, is also changed, i.e. corrected. Neighboring points should preferably not be
    the same amount of correction as the selected point, and the correction in advance, the specified area of impact around 9
    to the values stored in the storage device 1. The result will be the values corresponding to the desired operator-selected point that has a complete correction should decrease when removed (by Gauss function, linearly or a similar dependence. If color signals are to be output in cylindrical coordinates, the area the exposure may also be an asymmetric chromaticity subspace. In a separate operation, the distance of the adjacent points of the chromaticity space is calculated relative to and all points of the color space that are outside the predetermined distance from it, which is the area of effect of the correction, are not taken into account. To cover the neighboring points, there is a clock generator 19i that forces address counter 20 to be increased, and for each address clock of the address stored the selected image points X, Y, Z in the increment 21 of the addresses increase by 1, and in the 22 calculator of the distances the distances of the neighboring points X-, Y, -, Z are calculated relative to the selected point, and the beginning of the calculation This should be at the point (x -6), since otherwise it will only cover a quarter of the ball. This calculator 22 must calculate the distances using the formula (XX.). (YV, fH (2-2.) 2) The result is output to the computational level 23, in which the value of the function to be assessed is stored, i.e. the area at the selected point. At the same time, the maximum distance is entered into this area beyond which no correction should be made. The result of the distance calculation is given to multiplying stage 2, which is connected to the storage device 18, and the difference with respect to the specified correction value is multiplied by Feature distances. Thus obtained so-called actual value delta correction for adjacent dots, which is added in adder 25 to the actual
    my correction. With these corrected values, the corresponding standard correction values in the memory are rewritten. The whole process separately pro-5
    is driven for each neighboring point that falls within the distance range by continuing the counting of the address counter 20 or the step 21 of the increment of addresses. In order to carry out point-by-point processing of information, a clock generator 19 is provided which, after receiving input values X, Y Z. and output values mg, su, ye, sw in memory 13 and inputting the set values via the keyboard 15 and entering the action area, runs to work. The time between two tacos is chosen so that it has time to go through the calculation of the distance in the calculator 22, the calculation of the delta values from the specified values in the device 17, as well. multiplying the distances estimated in step 23 by delta values in step 2k and adding them to a record of correction values. Between devices H and 17, a key 26 is provided, which is closed only to calculate the delta values, and in other cases it is a whip. ttezhdy adder 25 and the storage device 5 provides another key, 27, which closes obtained in step 28 by delay time tact for the time of recording correction values .., .-, ... After the correction value is memorized, the next clock generator 19 through address counter 20 in step 21 increases by 1 the value of the previous address. The next point in the color space is selected through wire 29 and. the input register k of the memory device 5, and the corresponding output values of the standard correction appear in the output register b. At the same time, in the distance calculator 22, the address is also increased by 1. It becomes possible to calculate the distance for the new neighboring point. Subsequent operations are performed, as for the previous point of the image, until all points in the area of action E have been processed. Accounting for changes in the correction for the exposure area can be done in various ways. The function, the PS of which is evaluated in step 23, can be chosen so that for all values exceeding 6. no values will be given out.
    权利要求:
    Claims (4)
    [1]
    In another case, the calculated distance is compared with value 6 and then the corresponding function value is taken from the function itself. which can be presented as a table. The advantage of this possibility lies in the tyum, that once a function has been established it can be used for a whole number of values. Another possibility is to refuse to calculate the distance, due to the fact that the course of the function E l (xX.) {VY.f. (2-Zf is taken into account in the evaluation function. Fig. 2 shows how partial correction of the point entered by the operator within the color space. The values of R, -G. At this point are the corresponding addresses X, y, Z inside the correction memory 5, and for simplicity it is assumed that the addresses X, Y, Z are distributed with the same / 1 gradation mi, i.e., that the values of R, G, B are quantized with the same gradation to 1. Network nodes in the area bounds X located at a distance (L from each other, each represents the address of a neighboring point relative to the center point on the plane X, Y. This plane represents the cross section of the color space for Z const. In Fig. 2 relative to the point M, a circle of radius is drawn C, within which the correction must act. Above the plane X, Y is an estimated or weighted function, by means of which in step 23 the correction values are weighted depending on the distance. At the central point M, the correction should be 100, and at a distance from M, i.e. on the circumference of the circle, it should be zero. FIG. 2 shows only one section in the plane. In reality, the area in which the neighboring points are located is a spherical volume with a radius of j pa, and the weight function also acts in other coordinate directions. In addition, this function for various individual colors (mg, ye, su, sw) can be chosen different. Fig. 3 shows examples of some values in the X, Y dg plane, individual color correction points inside the action area. The distance from the ordinary t / points to the other is equal to J. The values of R, G, and B are divided into 25 degrees of steps, and the center point M with coordinates, has values, and, FIG. , a - e shows some examples for the evaluation function, how they can be applied to the numerical example of FIG. 3 (from a to e cuts for five coordinate values), as parts of the correction are distributed on the standard correction values in the color space within the limits; correction width 6, here using the yellow partial color image as an example). The standard correction program is represented by vertical lines with a zero value beyond the limits of the drawing. To this is added: with the corresponding correction value. If you connect the end points of the straight sections added and the end points of the Initial Correction Values, you will get an area that represents the course of the correction within the individual cuts. FIG. 4 f shows the npi-jjjiep of the characteristic course of the Gaussian distribution curve, over which correction can be made. For the central one, the intensity of the correction is 1uU%. Further progress of the correction can be described by the formula (f) The distance is one in relative units and therefore varies from zero to one. With a value of 1, the correction should no longer work, and standard correction values should be taken. ; The device is not limited to the example described in FIG. 1. For example, the calculated correction values can be entered into a separate storage device and, during the reproduction of the 7JO, they cannot request values from there if they are needed. The proposed solution improves image quality and extends functionality by additionally correcting any area of the original. Claim 1. Method of correcting the standard color correction when printing reproducible color images, according to which the image colors of the original are read and trichromatically divided. The optical-electronic unit converts the separated image colors into a digital code and transfers their values to a storage unit in which the input combinations the values of the digital values of the color of the image are compared with the combinations of previously entered standard values of the color of the image, and transmitted to the reproducing For example, in order to improve the quality of the image and enhance the functionality of the image by additional correction of any area of the original, the additional correction of the selected image area is performed by the coordinates of the points inside the specified area, and the values additional corrections are calculated for each point of a given area, continuously decreasing from the central point to its boundary, and they replace the values of the standard correction values and in the storage unit, while before reproducing the image, the corrected values of the output signals of the storage unit are measured and converted to match the specified additional correction values, the deviations from which are determined as the difference values between the values of the zag, the data of the additional correction and the measured magnitude p- “output corrected signals, and memorize.
    [2]
    2. The method according to claim 1, which is also distinguished by the fact that the additional correction is carried out according to the coordinates of the points according to the Gauss function.
    [3]
    3. The method according to claim 1, in which the additional correction of the image is carried out in cylindrical coordinates.
    [4]
    4. A device for correcting the standard color correction in reproducing reproduced color images, comprising a reading opto-electronic unit connected to an analog-digital converter connected via a first key with a storage unit connected to the standard image correction and reproducing units. that the display and comparison blocks, three additional ignition blocks, an adder, a logic circuit, an address storage unit, an address increment and evaluation circuit, a counter the clock generator, the second key and the distance calculator, while the outputs of the storage unit are connected to the inputs of the display unit, the outputs of the display unit are connected to the inputs of the first additional storage unit through the second key, one output of which is and the second output through the third key is connected to one of the inputs of the comparison unit, the second input of the comparison unit is connected with the output of the second additional memory block connected to the input of the specified additional correction values, output lo9
    10 // 12 712 as comparison is connected to the input of the third additional storage block, the output of which is connected to the input of the logic circuit connected to the input of the adder, the output of the adder is connected via the fourth key to the input of the storage block, and the output of the analog-digital converter through the first the key and the fifth key, kinematically connected to the second key, is connected to the input of the address storage unit, one output of which is connected to the input of the address incrementing circuit, and the other output is connected to the distance calculator input, The second input of the address increment circuit is connected to the output of the counter, the input of which is connected to the output of the clock generator, the output of the address increment circuit is connected to the inputs of the storage unit and the distance calculator, the output of which is connected to the input of the evaluation circuit, and the output of the evaluation circuit is associated with one of the inputs of the logic circuit. Sources of information taken into account during the examination 1. US patent M 2721892, cl. 358-80, published, 1955. 2. Patent of Germany No. 1053311, class, 57 d 3/02, published. I960 (prototype 983837
    / X
    to
    at)
    x.y ,, y, Z
    x.y.i
    类似技术:
    公开号 | 公开日 | 专利标题
    SU993837A3|1983-01-30|Method and device for readjustment of standard colour correction in printing reproducible colour images
    US4060829A|1977-11-29|Method of color correction
    US4275413A|1981-06-23|Linear interpolator for color correction
    US4481532A|1984-11-06|Method of determining and storing color printing information
    US4577219A|1986-03-18|Method and an apparatus for copying retouch in electronic color picture reproduction
    US4393399A|1983-07-12|Method and apparatus for partial electronic retouching of colors
    US4959711A|1990-09-25|Method and apparatus for correcting the color of a printed image
    EP0566914B1|1998-07-01|Color tone correcting apparatus
    US4410909A|1983-10-18|Method for automatically determining reproduction picture color control conditions
    US4414635A|1983-11-08|Method and circuit for recognition of colors
    EP0793377B1|2001-10-10|Blended look-up table for printing images with both pictorial and graphical elements
    US4929978A|1990-05-29|Color correction method for color copier utilizing correction table derived from printed color samples
    US5087126A|1992-02-11|Method of estimating colors for color image correction
    EP0308858A2|1989-03-29|Method of correcting color image data for obtaining proof image
    EP0574905A2|1993-12-22|Method and apparatus for forming color images
    US5398123A|1995-03-14|Image processing method and apparatus capable of automatic color masking
    EP0054313B1|1989-11-15|Colour image duplicating device and method
    JPH1155536A|1999-02-26|Color transformation table, color transformation, color signal generator, method for generating color transformation table, color transformation method and method for deciding color area
    US4668979A|1987-05-26|Production of color separations for single color printing in which separation hues and colors are optimally defined with respect to hue, color separation, and luminance
    US4486772A|1984-12-04|Method and circuit arrangement for partial correction of the delineation in color image reproduction
    AU5315500A|2000-12-28|Method for determining printer dye levels
    US4965664A|1990-10-23|Color image signal processing method and apparatus for recording a color image from input color image signals by converting an individual color signal component
    US4789892A|1988-12-06|Color adjusting device including matrix-masking circuitry
    JP2817839B2|1998-10-30|High performance color rendering method to avoid moiré problem
    US5519515A|1996-05-21|Method of determining color signals for input signals at vertices in input color space
    同族专利:
    公开号 | 公开日
    AU532752B2|1983-10-13|
    FR2441198B1|1987-03-27|
    FR2441198A1|1980-06-06|
    CA1154157A|1983-09-20|
    CH645997A5|1984-10-31|
    DD147427A5|1981-04-01|
    IT1124655B|1986-05-14|
    IL58611D0|1980-02-29|
    JPS5565958A|1980-05-17|
    GB2036989A|1980-07-02|
    NL7908193A|1980-05-12|
    GB2036989B|1983-04-13|
    JPS612935B2|1986-01-29|
    DE2848376A1|1980-05-29|
    SE7908969L|1980-05-09|
    IT7926800D0|1979-10-26|
    SE440704B|1985-08-12|
    NL184392B|1989-02-01|
    US4328515A|1982-05-04|
    BE879731A|1980-02-15|
    DE2848376C2|1983-12-15|
    NL184392C|1989-07-03|
    IL58611A|1983-07-31|
    AU5244779A|1980-05-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2799722A|1954-04-26|1957-07-16|Adalia Ltd|Reproduction with localized corrections|
    GB1294191A|1970-01-28|1972-10-25|Crosfield Electronics Ltd|Improvements relating to apparatus for reproducing coloured images|
    US3893166A|1972-01-05|1975-07-01|Crosfield Electronics Ltd|Colour correcting image reproducing methods and apparatus|
    GB1400806A|1972-12-04|1975-07-23|Crosfield Electronics Ltd|Image reproduction systems|
    DE2301393A1|1973-01-12|1974-07-18|Mohndruck Reinhard Mohn Ohg|METHOD AND DEVICE FOR ANALYSIS OF A DOCUMENT FOR DETERMINING SCREEN TONE VALUES FOR REPRODUCTION USING THE PRINT CHARACTERISTICS OF A PRINTING INK SCALE OR DGL|
    US3848856A|1973-10-01|1974-11-19|Hazeltine Corp|Local correction apparatus for a color previewer|
    DE2544703C3|1975-10-07|1978-04-06|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Method and circuit arrangement for recognizing the colors of a colored surface|
    DE2621008B2|1976-05-12|1978-10-26|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Process for obtaining and utilizing color correction data for color image recording|
    DE2810430C3|1978-03-10|1981-04-30|2300 Kiel Dr.-Ing. Rudolf Hell Gmbh|Method and circuit for selectively correcting the colors of an image to be reproduced|DE3003607C2|1980-02-01|1984-01-05|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Circuit arrangement for partial post-correction of color recognition spaces during color recognition|
    US4472736A|1980-03-11|1984-09-18|Dainippon Ink And Chemicals Incorporated|Lithographic reproduction original classification and color separation tone curve adjustment|
    AT10309T|1980-09-10|1984-11-15|Dr.-Ing. Rudolf Hell Gmbh|METHOD AND CIRCUIT ARRANGEMENT FOR PARTIAL ELECTRONIC RETOUCHING IN COLOR IMAGE REPRODUCTION.|
    US4458265A|1980-12-17|1984-07-03|Matsushita Research Institute Tokyo, Inc.|Color image duplicating system|
    DE3110222C2|1981-03-17|1985-06-20|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Process for partial smoothing retouching in electronic color image reproduction|
    JPS6335150B2|1981-03-30|1988-07-13|Dainippon Screen Mfg|
    JPH0352570B2|1981-06-18|1991-08-12|Fuji Photo Film Co Ltd|
    US4500919A|1982-05-04|1985-02-19|Massachusetts Institute Of Technology|Color reproduction system|
    AT14944T|1982-05-29|1985-08-15|Hell Rudolf Dr Ing Gmbh|METHOD FOR TONE-RESISTANT COLOR RETURN IN FOUR-COLOR PRINTING.|
    JPH0444461B2|1982-09-20|1992-07-21|Sony Corp|
    US5191361A|1983-03-08|1993-03-02|Canon Kabushiki Kaisha|Image reproducing system|
    DE3408336C2|1983-03-08|1993-03-18|Canon K.K., Tokio/Tokyo, Jp|
    AU2932384A|1983-06-21|1985-01-03|Hazeltine Corp.|Automatic colour analysis based on minimum/maximum video level|
    DE3347049C2|1983-12-24|1986-07-17|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Method and circuit arrangement for simulating multicolor printing on a color monitor|
    JPS61290866A|1985-06-19|1986-12-20|Matsushita Graphic Commun Syst Inc|Color picture processing unit|
    JPS6243971A|1985-08-21|1987-02-25|Matsushita Graphic Commun Syst Inc|Color original reader|
    JPS62101178A|1985-10-29|1987-05-11|Canon Inc|Picture information processor|
    JPH0575221B2|1985-11-09|1993-10-20|Fuji Photo Film Co Ltd|
    JPS62111570A|1985-11-09|1987-05-22|Fuji Photo Film Co Ltd|Automatic setting method for output signal processing condition in image input/output system|
    US4750050A|1985-12-11|1988-06-07|Corporate Communications Consultants, Inc.|Editing system and method|
    FR2604537A1|1986-09-30|1988-04-01|Lesouef Serge|METHOD FOR OBTAINING IMPROVED PRINTS IN PRINTING|
    US5140413A|1986-11-14|1992-08-18|Canon Kabushiki Kaisha|Image processing apparatus including processing means for moving image and performing conversion|
    CA1281363C|1986-11-14|1991-03-12|Yasumichi Suzuki|Color image processing apparatus|
    DE3738014A1|1987-11-09|1989-05-18|Winrich Dipl Ing Gall|Method of generating coloured images on a carrier surface|
    JP2651482B2|1987-12-29|1997-09-10|大日本スクリーン製造株式会社|Display device in image processing device|
    EP0425253B1|1989-10-24|1997-08-13|Canon Kabushiki Kaisha|Colour image forming method|
    DE4002298C2|1990-01-26|1995-11-09|Agfa Gevaert Ag|Method and device for the automatic correction of color casts in electronic image processing|
    JPH04304073A|1991-03-30|1992-10-27|Toshiba Corp|Picture processor|
    EP0574905B1|1992-06-19|1998-09-02|Matsushita Electric Industrial Co., Ltd.|Method and apparatus for forming color images|
    DE4232704C2|1992-09-30|1995-04-20|Hell Ag Linotype|Method and circuit arrangement for the electronic retouching of images|
    JPH07170421A|1993-09-27|1995-07-04|Ricoh Co Ltd|Color conversion method|
    US5592591A|1993-10-04|1997-01-07|Xerox Corporation|Reduced storage of pre-computed difference tables used in color space conversion|
    US6301025B1|1994-06-24|2001-10-09|Mgi Software Corporation|Method for performing a color space transformation|
    US5627950A|1994-09-16|1997-05-06|Apple Computer, Inc.|Real-time three-dimensional color look-up table interactive editor system and method|
    JP2856386B2|1994-10-26|1999-02-10|松下電器産業株式会社|Color adjustment device and method|
    DE19842573A1|1998-09-17|2000-04-13|Heidelberger Druckmasch Ag|Color adaptive retouching of electronic color images using sample values to determine average color condition|
    WO2001005141A1|1999-07-12|2001-01-18|Sagawa Printing Co., Ltd.|Color correcting method and device, and recorded medium on which color correcting program is recorded|
    US7554586B1|1999-10-20|2009-06-30|Rochester Institute Of Technology|System and method for scene image acquisition and spectral estimation using a wide-band multi-channel image capture|
    US20070002180A1|2005-06-30|2007-01-04|Lexmark International, Inc.|Strength parameter-based color conversion of digital images|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19782848376|DE2848376C2|1978-11-08|1978-11-08|Device for post-correction of standard color corrections in color image recording|
    [返回顶部]