CN101399899B - Color processing method and image forming apparatus - Google Patents
Color processing method and image forming apparatus Download PDFInfo
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- CN101399899B CN101399899B CN200810168848XA CN200810168848A CN101399899B CN 101399899 B CN101399899 B CN 101399899B CN 200810168848X A CN200810168848X A CN 200810168848XA CN 200810168848 A CN200810168848 A CN 200810168848A CN 101399899 B CN101399899 B CN 101399899B
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Abstract
Restriction information on a total colorant amount for a medium is obtained. Patches at grid points in a color space corresponding to a plurality of colorants at which the total colorant amount falls within a restriction represented by the restriction information, and a patch at a point surrounded by the patches are generated. Color values are obtained by measuring the colors of the patches printed on the medium. It is determined based on a color prediction value between the grid points whether the measured color values are appropriate, and if so, a color value at a grid point at which the total colorant amount exceeds the restriction is estimated based on the measured color values. A color separation table is created based on the measured color values and the estimated value.
Description
Technical field
The present invention relates to the color processing method and the image processing system of color rendering that be used for view data is resolved into the data of a plurality of colouring agents with generating.
Background technology
Along with the raising such as the quality of formation image in the image processing system of color printer that recently manifests coloured image on print media, the user is also rising to the required standard of medium.In order to satisfy these standards, a printer need be handled various types of media, and on arbitrary medium the outputting high quality image.
Usually, the color printing system of use color printer etc. is carried out color separation processing, the color image data that will form is decomposed into the amount separately of colouring agent (printing ink or toner) in this color printer.Carry out described color separation processing based on the color rendering that generates in advance.Yet optimal color separation processing changes with the type of medium.Therefore, preferably be ready to a plurality of color renderings so that each media type is realized optimal color separation processing.
According to conventional art, color rendering is manually to generate, and therefore can prolong the design cycle greatly to various types of medium designs color renderings.In order to generate color rendering fast, need a kind of technology that is used for generating automatically the color rendering relevant with the medium of any type at all kinds of media.
Usually, in the color rendering every has the balance relation: if widen colour gamut, then rely on the tone of the colouring agent that will use will be impaired.Therefore, the user need correspondingly adjust the color rendering of automatic generation.
In the color rendering that generates, when light source changed, colour gamut will change or tone can be impaired.Therefore, need generate color rendering at each light source.Hope manifests the user interface of the color rendering in the Lab space by use, allows the user to adjust color rendering corresponding to light source.
As mentioned above, when automatic generation during, need carry out optimal treatment to this color rendering according to light source corresponding to the color rendering of medium.In other words, instrument (user interface) must allow the user to adjust the color rendering of generation arbitrarily.The generation of this user interface needs a kind of noting be used in to print color lump on the medium or measure this color and can simulate the color Predicting Technique of mixed color development properties.
The color Predicting Technique of simulation color development properties need become grid with the colouring agent space segmentation during according to mixed colorant, prints total-grid point (hereinafter being called primary colors), and measures this color.Yet, because to the total colouring agent quantitative limitation on the medium, so can not print some primary colors.To the described primary colors that can not print, proposed a kind of by the linear technology (for example, referring to TOHKEMY 2003-334934 communique) that makes primary colors strictly observe total painted dosage restriction of revising simply.Yet, linear when revising primary colors when coming according to total painted dosage restriction, lost the linear relationship with on every side primary colors, reduced the predictability of this color.In addition, if the quantity of the colouring agent that uses increases, then the quantity of primary colors and print load also increase.
Described color prediction processing is used the color reprodubility reference table of definition for the spectral value of each primary colors of the medium that uses.Color reprodubility table with reference to Figure 14 and 15 explanation references in the color prediction processing.
Figure 14 illustrates traditional color reprodubility table to generate the flow chart of handling.
Input parameter in step S1401.This parameter is the data of the quantity and spacing of total painted dosage restricted information, the grid in the printing ink space such as medium, in step S1402, after generating whole primary colors, because total painted dosage falls into total painted dosage restriction thereby the primary colors that can print is generated as color lump.In step S1403, on medium, be printed on the described color lump that generates among the step S1402 to measure this color.In step S1404, input colour examining result.
In step S1405, need to use described measured color value to estimate the measured color value of the primary colors that can not print because total painted dosage surpasses total painted dosage restriction.By these steps, can obtain described measured color value, i.e. the spectral value of whole primary colors.
The color reprodubility table that generates can carry out the color prediction in the arbitrfary point in comprising the color space of primary colors.More particularly, when input during as the signal value of the point of forecasting object, predict by carry out the color that uses known cellular Neugebauer (local knob Jie fort) to handle based on the measured color value of this primary colors on every side in the color reprodubility table, can export the spectral value of this point.
Figure 15 is the figure that the example of the primary colors that can print He can not print when using cyan (C) and two kinds of printing ink of carmetta (M) is shown.In Figure 15, quantity (being three in this example) the divided frame line with grid between four some W, C, M and C+M obtains primary colors.In this example, 0,85,170 and 255 places are divided into three parts with each frame line at point.In Figure 15, symbol ● expression falls into the primary colors that can print of the total painted dosage restriction that is illustrated by the broken lines, and forms each primary colors that can print as color prediction color lump (colorpatch) thus.Symbol zero expression surpasses the primary colors that can not print of total painted dosage restriction.By the color prediction processing of using above-mentioned color prediction color lump to carry out, the primary colors that can not print obtains suitable spectral value.
Yet the color reprodubility table generates the problem of handling below existing.The calculating that is used to estimate primary colors is to be prerequisite suitably to have printed the color lump that generates.If there is not suitably to print the color lump of the primary colors that can print for a certain reason, then the estimation result's of the primary colors that can not print reliability will variation.In the case, the precision of the color reprodubility table that generates based on the primary colors of estimating reduces.Predict that by the color of reference color reprodubility table the precision of the color rendering that generates also reduces.
Summary of the invention
The present invention is intended to address the above problem, and its purpose is to provide color processing method and the image processing system with following feature.That is,, obtaining suitable measured color value corresponding to the whole grid point place in the color space of a plurality of colouring agents by judging whether suitably to print the color lump of the color reprodubility information that is used to generate medium.From these measured color values,, suitably generate color reprodubility information to generate suitable color rendering by using the color prediction of color reprodubility information.
According to an aspect of the present invention, it provides a kind of measured color value that is used to use the color lump of printing on medium to generate the color processing method of color rendering, this color rendering is used for view data is decomposed into the data of a plurality of colouring agents, and described color processing method may further comprise the steps: obtain about the total colouring agent quantitative limitation information at medium; Generate total painted dosage and fall into the represented restriction of described restricted information and be positioned at by cutting apart the color lump at the grid point place that the color space corresponding with a plurality of colouring agents obtain, and generate by described grid point around the color lump at some place; Obtain measured color value by the color of measuring the described color lump of printing on the described medium; Based on the color predicted value between the grid point, judge whether the described measured color value that obtains at described obtaining step is suitable; When in described determining step, judging that described measured color value is suitable,, estimate that total painted dosage surpasses the measured color value at the grid point place of the represented restriction of described restricted information based on described measured color value; And, generate color rendering based on described measured color value that in described obtaining step, obtains and the described measured color value in estimation steps, estimated.
According to a further aspect of the invention, it provides a kind of measured color value that is used to use the color lump of printing on medium to generate the color processing apparatus of color rendering, this color rendering is used for view data is decomposed into the data of a plurality of colouring agents, and described color processing apparatus comprises: obtain the unit at total colouring agent quantitative limitation information of medium; Generate total painted dosage and fall into the represented restriction of described restricted information and be positioned at by cutting apart the color lump at the grid point place that the color space corresponding with a plurality of colouring agents obtain, and generate by described grid point around the unit of color lump at some place; Obtain the unit of measured color value by the color of measuring the described color lump of printing on the described medium; Based on the color predicted value between the grid point, judge the unit that the described measured color value that obtains at described obtaining step is whether suitable; When judging that in described determining step described measured color value is suitable,, estimate that total painted dosage surpasses the unit of measured color value at the grid point place of the represented restriction of described restricted information based on described measured color value; And, generate the unit of color rendering based on described measured color value that in described obtaining step, obtains and the described measured color value in estimation steps, estimated.
The further characteristic of the present invention will obtain clear and definite in the description below with reference to the exemplary embodiment of accompanying drawing.
Description of drawings
Fig. 1 is the block diagram that the image output in the color printer according to an embodiment of the invention is shown.
Fig. 2 is the figure that the system configuration of embodiment is shown.
Fig. 3 is the figure that the structure of the printing ink color rendering among the embodiment is shown.
Fig. 4 be illustrate among the embodiment as the cubical figure in the RGB color space of color rendering.
Fig. 5 illustrates the flow chart that color rendering among the embodiment generates processing automatically.
Fig. 6 illustrates the flow chart of processing of frame line that automatic generation among the embodiment strictly observes the color rendering of maximum printing ink application quantity.
Fig. 7 is the flow chart that the color rendering optimal treatment is carried out in the color prediction that passes through that illustrates among the embodiment.
Fig. 8 is the flow chart that the color separation bezel, cluster line optimal treatment among the embodiment is shown.
Fig. 9 is the figure that the example of the color rendering adjustment user interface (UI) among the embodiment is shown.
Figure 10 is that the color reprodubility table that illustrates among the embodiment generates the flow chart of handling.
Figure 11 is that the primary colors color lump that illustrates among the embodiment generates the flow chart of handling.
Figure 12 is the figure that the primary colors color lump among the embodiment is shown and checks the example of color lump.
Figure 13 illustrates the flow chart that the primary colors color lump self check among the embodiment is handled.
Figure 14 illustrates traditional color reprodubility table to generate the flow chart of handling.
Figure 15 is the figure that the example of traditional primary colors color lump is shown.
Figure 16 is the figure that the example of the color rendering adjustment UI among the embodiment is shown.
Figure 17 is the figure that the example of the color rendering adjustment UI among the embodiment is shown.
Figure 18 is the figure that the example of the primary colors color lump among the embodiment is shown.
Figure 19 is that the color reprodubility table that illustrates among the embodiment generates the flow chart of handling.
Figure 20 is that the color profile (profile) that illustrates among the embodiment generates the flow chart of handling.
Figure 21 A illustrates the figure that carries out the example of match colors by traditional tetragonal body interpolation.
Figure 21 B is the figure that the example of the match colors among the embodiment is shown.
Figure 22 is the figure that the example of traditional primary colors color lump is shown.
Figure 23 illustrates traditional color prediction color lump data to generate the flow chart of handling.
Embodiment
Describe various exemplary embodiment of the present invention, characteristic and some aspects below with reference to accompanying drawings in detail.
＜the first embodiment 〉
(output is handled)
Fig. 1 is the block diagram that illustrates according to the image output in the color printer of first embodiment.In Fig. 1, match colors unit 101 mates R, the G of input and the reproducibility and the printer color of B data.Printing ink divide color element 102 will be from the match colors unit multistage R ', the G ' of 101 outputs and B ' data be converted to C ', M ', Y ' and K ' data as the color of printer colouring agent.Halftone cell 103 will divide multistage C ', M ', Y ' and the K ' data of color element 102 outputs to be converted to the expressible tone of printer from printing ink, and output C, M, Y and K data.Printing ink color rendering unit 105 be provided at by printing ink divide in the interpolation processing that color element 102 carries out will reference the printing ink color rendering.Printing ink color rendering generation unit 104 generates the printing ink color rendering that will keep in printing ink color rendering unit 105.This printing ink color rendering also will be called " color rendering " for short.
Fig. 2 is the figure that the system configuration among first embodiment is shown.In Fig. 2, computer 202 keeps the view data of input, and has the input unit (not shown) such as mouse or keyboard that is used to import user's indication.Monitor 201 shows the view data that is kept in the computer 202.The view data that keeps in color printer 203 printing computers 202.In above-mentioned processing configuration shown in Figure 1, printing ink color rendering generation unit 104 is comprised in the computer 202, and remaining unit is comprised in the printer 203.Whole unit can also be included in the computer 202, and C, M, Y and the K data that will come from halftone cell 103 are input to printer 203.
With reference to Fig. 1 and 2 print processing among first embodiment is described.The view data that will remain in the computer 202 via cable, network (not shown) etc. in printing is sent to printer 203.
In printer 203, match colors unit 101 couples of R that send, G and B view data are carried out match colors, so that their color reprodubilities with the monitor 201 of user's use are complementary.By the interpolation processing based on the color rendering that remains on the generation in the printing ink color rendering unit 105, it is C, M, Y and K ink color in the printer 203 that printing ink divides R ', G ' that color element 102 will live through match colors and B ' data decomposition.C ', M ', Y ' and the K ' multi-stage data that halftone cell 103 will live through the printing ink color separation is converted to C, M, Y and the K data corresponding to printer 203 reproducible tones.Then, C, M, Y and K data are printed on the predefined medium.
In Fig. 2, medium 204 (being that five class medium A are to E in this example) is that printer 203 can be printed.First embodiment prepares and the corresponding printing ink color rendering of all kinds of energy print media.Because the color rendering that printer 203 keeps corresponding to media type, so execution is to the printing ink color separation of the best of media type.The printing ink color rendering is generated in advance by printing ink color rendering generation unit 104, and this generation method will be described in the back.
Label 205 expression colorimeters.When generating the printing ink color rendering in first embodiment, reference is at the pre-prepd color reprodubility table of each medium.In order to generate the color reprodubility table, colorimeter 205 is measured the color of the color lump of having printed primary colors, and the colour examining result is input to computer 202.Colorimeter 205 also can be connected with computer via network, also can carry out colour examining via network in other place.
(printing ink color rendering)
Fig. 3 is the figure that the structure that remains on the color rendering in the printing ink color rendering unit 105 is shown.Described color rendering will with R ', the G ' of input and B ' data be corresponding, be the table data corresponding to the storage of the grid point in the cube in the three-dimensional rgb space.When the R ', the G ' that do not have input on the grid at color rendering and B ' data, then printing ink divides color element 102 to use adjacent gridden data to carry out interpolation processing.As interpolation method, proposed to comprise the whole bag of tricks of tetrahedron interpolation method and cube interpolation method, and can adopt any interpolation method.
The basic printing ink color separation table generating method of printing ink color rendering generation unit 104 will be described now.
Fig. 4 illustrates the cubical figure that being used among first embodiment illustrates the RGB color space of printing ink color separation table generating method.W, C, M, Y, R, G, B and Bk represent cubical eight summits.Heavy line represents to connect whole 19 lines of W-Bk, W-C, W-M, W-Y, W-R, W-G, W-B, Bk-C, Bk-M, Bk-Y, Bk-R, Bk-G, Bk-B, M-R, R-Y, Y-G, G-C, C-B and B-M.When printing ink divides the figure place of the input data in the color element 102 to be 8, then give summit W, C, M, Y, R, G, B and Bk following coordinate:
W=(255,255,255): expression is white, i.e. the color of medium itself.
C=(0,255,255): expression cyan primary colors.
M=(255,0,255): expression fuchsin primary colors.
Y=(255,255,0): expression xanthan look.
R=(255,0,0): expression red primaries.
G=(0,255,0): expression green primary color.
B=(0,0,255): expression blue primary.
Bk=(0,0,0): expression is black, i.e. the stain of printer.
At first, printing ink color rendering generation unit 104 generates the table data of the line of connection W-C, the W-B, W-M, W-Y, W-R, W-G, B-Bk, M-R, R-Y, Y-G, G-C, C-B, B-M, Bk-C, Bk-M, Bk-Y, Bk-R, Bk-G and the W-Bk that are represented by the heavy line among Fig. 4.Then, at the ink color corresponding to the in-house network lattice point, printing ink color rendering generation unit 104 carries out inner interpolation processing to generate whole table data.
Although the printer 203 among first embodiment can be handled polytype () medium for example, five classes will illustrate the example that uses two class media for convenience of description as mentioned above.More particularly, printer 203 can use as the medium A of first kind medium with as the medium B of the second class medium, and prepares the color rendering at each medium.
For each medium is prepared different color renderings, can manually generate a plurality of tables at the All Media type.That is, manually import the table data of the represented line of heavy line among Fig. 4.Yet this method can not easily generate the color rendering at multiple media type.Therefore, the processing of first embodiment manually generates color rendering at the representational media type that is given, then based on the automatic color rendering that generates at other media type of the color rendering of described manual generation.That is, the processing of first embodiment manually generates the color rendering at medium A, generates the color rendering of medium B then automatically based on the color rendering of medium A.
(color rendering generates processing automatically)
The color rendering that to describe the printing ink color rendering generation unit 104 among first embodiment now generates processing automatically.
Fig. 5 illustrates by the flow chart of printing ink color rendering generation unit 104 automatic generations at the processing of the color rendering of medium B.
In step S501, printing ink color rendering generation unit 104 obtains the color rendering of medium A.The color rendering of supposing medium A is manually generated and is maintained in the printing ink color rendering unit 105.In step S502, printing ink color rendering generation unit 104 obtains the total painted dosage restricted information of medium B.The total painted dosage restricted information of medium B can also be imported via the input unit (not shown) by the user, or obtains in the table that keeps in advance from computer 202.Described total painted dosage restricted information is defined in the total painted dosage that does not produce stain etc. on the medium B.
In step S503, printing ink color rendering generation unit 104 generates the frame line of the color rendering of medium B automatically according to the total painted dosage restricted information of medium B, so that observe total painted dosage restriction.The details of the automatic generation processing of frame line will be described in the back.In step S504, printing ink color rendering generation unit 104 carries out optimization by the color prediction to described frame line.The details of the optimal treatment of color prediction will be described in the back.In step S505, printing ink color rendering generation unit 104 carries out inner interpolation, with the data of the total-grid point in the frame of the color rendering that generates medium B.Thereby, finish the color rendering of final medium B.
The total painted dosage restriction of stipulating in step S502 also can be a value that produces stain etc. a little, and is not limited to not produce the value of any stain.
(color separation bezel, cluster line generates processing (in detail) automatically)
Fig. 6 is illustrated in the flow chart of processing of frame line that automatic generation among the step S503 of Fig. 5 strictly observes the color rendering of the total painted dosage on the medium B.This processing generates the frame line of the color rendering of medium B automatically based on the color rendering of the medium A of manual generation.
In step S603, printing ink color rendering generation unit 104 obtains such as to the priority of the assessment item of the image that forms be used for the various parameters of the non-linear correction factor of non-linear interpolation.In step S604, printing ink color rendering generation unit 104 will be classified by available ink color in printer 203.In this example, ink color is divided into three types: main look, light color and adjacent look.More particularly, C, M, Y and K printing ink are classified as main look, nattierblue (Lc), light fuchsin (Lm), dark-grey (Lk1) and light ash (Lk2) printing ink and are classified as light color.R, G and B printing ink are classified as adjacent look.
In step S605, printing ink color rendering generation unit 104 is set the frame line of the color rendering of medium B based on the color rendering of medium A.The frame line is for connecting 19 lines altogether of W-Bk, W-C, W-M, W-Y, W-R, W-G, W-B, Bk-C, Bk-M, Bk-Y, Bk-R, Bk-G, Bk-B, M-R, R-Y, Y-G, G-C, C-B and B-M.More particularly, from the color rendering of medium A obtain each frame line about the information of the switching point between Bk and the remaining color the undercolour removal (UCR) with about the information of the decomposition ratio of each colouring agent color.
Article 19, each in the frame line experiences following processing successively.As processing sequence, at first handle tie point W and Bk line to color point C, M, Y, R, G and B, handle the line that connects color point then.
In the case, some C, M, Y, R, G, B, Bk and the W in the color space is defined as primary color points.
In step S606, printing ink color rendering generation unit 104 calculates the branch colour that is located at the described primary color points on the frame line in step S605, so that observe the total painted dosage restricted information of medium B.At step S607, the branch colour to the frame line in the printing ink color rendering generation unit 104 is carried out interpolation.For the primary color points C in the color rendering of medium B, suppose that total painted dosage is 180% in the color rendering of medium A, the total painted dosage that in step S606 medium B is calculated is 200%.In the case, will increase by 20% at the total painted dosage of the color rendering mid point C of medium A to reach 200%.In company with it together, whole C value of the frame line of setting in step S605 (in the case, being among Bk-C, W-C, C-B and the C-G) is linear to increase by 20%, sets the value of this end value as the frame line in the color rendering of medium B then.
In step S608, printing ink color rendering generation unit 104 is determined the non-linear correction factor intensity of each color according to the priority of each assessment item of setting in step S603.Described non-linear correction factor intensity is to be used for value that each ink color (being main look (C, M, Y and K), light color (Lc, Lm, Lk1 and Lk2) and adjacent look (R, G and B)) is carried out non-linear correction, and represents with E1, E2 and E3.For example, when setting as assessment item,, then non-linear correction factor intensity is set at E1=1, E2=3, E3=1 for the efficient light color printing ink that uses with " graininess is preferential ".For example, when being set as assessment item,, non-linear correction factor intensity is set at E1=3, E2=1, E3=2 for the main color ink of efficient use with " colour gamut is preferential ".
In step S609, printing ink color rendering generation unit 104 uses the non-linear correction factor intensity E1 of main look to carry out and revises.In step S610, printing ink color rendering generation unit 104 uses the non-linear correction factor intensity E2 of light color to carry out and revises.At step S611, printing ink color rendering generation unit 104 uses the non-linear correction factor intensity E3 of adjacent look to carry out and revises.The correction of using non-linear correction factor intensity E1, E2 and E3 that the ink color data are carried out in first embodiment can be suitable for the known modification method that employing can be carried out the parameter of non-linear correction.
In step S612, whether the summation of the quantity of ink of the grid point on the frame line in printing ink color rendering generation unit 104 judgment processing reaches the represented value of total painted dosage restricted information.The whole bag of tricks that can expect all can be used as determination methods.For example, consider the intensity update method (will describe in the back) in step S613, be enough to judge that whether as the summation of the quantity of ink of current correction result be maximum less than the represented value of total painted dosage restricted information.
If the summation of the value of described frame line does not reach the represented value of total painted dosage restricted information, promptly, have the space that is used to revise, then printing ink color rendering generation unit 104 upgrades non-linear correction factor intensity E1, E2 and E3 in step S613, so that they are increased.Then, printing ink color rendering generation unit 104 is revised in step S609 to S611 once more.As the non-linear correction factor intensity update method among the step S613, for example, each coefficient intensity is upgraded to add 1 mode.Yet, the invention is not restricted to this example.By the circulation of the judgement in step S612, the whole value on the controller chassis line is positioned as close to total painted dosage restricted information.As a result, can generate the maximum of the color rendering of medium B with total painted dosage of realization setting.
In step S614, printing ink color rendering generation unit 104 judges whether the whole 19 frame lines in the color rendering of treatment media B.If still there is not processed frame line, then printing ink color rendering generation unit 104 turns back to step S605 to handle described next frame line.
(optimization of the frame line of color rendering)
Describe the color rendering optimal treatment of using color to predict among the step S504 of Fig. 5 in detail with reference to the flow chart of Fig. 7.
Color rendering before the optimization that generates in step S503 strictly observes the total painted dosage of medium B, but the color and luster of the ink combination practical manifestation of having considered to revise.If directly use this color rendering to print, it is inaccurate or intend like profile to produce color.Inaccurate or intend like profile in order to suppress to produce color, first embodiment carries out following optimal treatment.
In step S703, printing ink color rendering generation unit 104 calculates the Lab value of medium A by the color prediction processing such as cellular Neugebauer, and this Lab value is set at target.More particularly, printing ink color rendering generation unit 104 obtains C, M, Y and the K value of the maximum gamut of medium A), and convert them to L, a and b value.This processing is based on L, a of the primary colors that maintains medium A and the color reprodubility table of b value carries out.
In step S704,104 predictions of printing ink color rendering generation unit are about the colour gamut of medium B, and more particularly, printing ink color rendering generation unit 104 obtains C, M, Y and the K value of the maximum gamut of medium B, and converts them to L, a and b value.This processing is based on L, a of the primary colors that maintains medium B and the color reprodubility table of b value carries out.
The processing sequence of attention step S703 and S704 also can be put upside down.
In first embodiment, reference is corresponding to the color reprodubility table of each medium in above-mentioned steps S703 and S704.The back will be described the generation that suitably generates the color reprodubility table and handle.
In step S705, printing ink color rendering generation unit 104 will be in step S704 the Lab value of Lab value and the target that in step S703, has been calculated of the maximum gamut of predicted medium B compare.Printing ink color rendering generation unit 104 reflection comparative results are to carry out optimal treatment to the frame line in the color rendering.The details of optimal method will be described in the back.The Lab value carries out because optimization is based on, so use known searching method to obtain C, M, Y and K value corresponding to optimized results.
In step S706, in order further to improve tone, the frame line of printing ink color rendering generation unit 104 level and smooth color renderings.More particularly, the gray tone on the maintenance Bk-W gray line.For remaining colour coloring agent, get rid of distinguished point, tone variations is smoothly served as reasons, and dullness increases and the dull shape that reduces formation mountain shape.This smoothing processing connects described frame line smoothly.
(color separation bezel, cluster optimal treatment)
Describe the color separation bezel, cluster line optimal treatment among the step S705 of Fig. 7 in detail with reference to the flow chart of Fig. 8.
In step S801, printing ink color rendering generation unit 104 obtains the initial value of the color rendering of wanting optimized medium B and the target Lab value of medium A.In step S802, printing ink color rendering generation unit 104 obtains the printing ink branch colour that has near the primary colors of the Lab value of target Lab value from the color reprodubility table of medium B.
In step S803, printing ink color rendering generation unit 104 is revised the printing ink branch colour in the color rendering of medium B based on the branch colour of obtaining in step S802.More particularly, the value of the grid point in the color rendering that will be corresponding with the printing ink branch colour of the described primary colors that obtains is changed into the printing ink branch colour of described primary colors, so that the frame line with this grid point is carried out interpolation.
In step S804, printing ink color rendering generation unit 104 will be converted to the Lab value based on the printing ink branch colour of the color prediction that comes from each grid point at the color rendering that changes in step S803.
In step S805, Lab value that printing ink color rendering generation unit 104 will obtain in step S804 and target Lab value compare.If this difference delta E is more than or equal to predetermined value Min, then printing ink color rendering generation unit 104 turns back to step S802 to repeat to obtain the search of printing ink branch colour.In this way, repeat the search and the correction of printing ink branch colour, till Δ E becomes less than Min, thereby optimization is corresponding to the gridden data of the color rendering of target.
Handle by target complete Lab value is carried out this, the color rendering of medium B is able to optimization.
(color rendering is adjusted UI)
Usually, when generating the color rendering corresponding, can widen colour gamut, but tone can be impaired by the combination of for example printing ink with multicoloured colored ink.Color rendering has the balance relation between the project of estimating (colour gamut and tone in the case).Which assessment item the user preferably determines preferentially to give to generate color rendering.
As mentioned above, in the color rendering that generates automatically, when the light source that the image that forms is shone changed, can not efficiently export colour gamut or tone can be impaired.Therefore, preferably generate color rendering respectively at each light source.
For this reason, first embodiment allows the user to adjust the color rendering at medium B that generates automatically in the above described manner arbitrarily via user interface (UI).And then, come the described color rendering of optimization according to the variation of light source.
Fig. 9 is the figure that the example of the color rendering adjustment user interface (UI) among first embodiment is shown.In Fig. 9, square frame 900 is used for selecting light source.Square frame 901 is used for the color rendering of input media A.Square frame 902 is used for the total painted dosage restricted information of input media B.Square frame 903 is used for importing the ink characteristics of the medium B that will adjust.This ink characteristics is the color reprodubility table of medium B, this color reprodubility table be based on single color the tone color lump measured color value and all the measured color value of the secondary colour color lump of color printing ink generate.
3D shows that 912 show in the 3DLab space by pressing the button the color rendering data of the 904 and 905 medium B that generate.
The a-b plane shows that 913 extract from 3D demonstration 912.Use bar (bar) 915 to set L values, the a-b plane shows 913 represent it is the a-b plane in the cross section cut open at L value place.Show on 913 that on the a-b plane solid line is represented as by pressing the button 904 generate and desired color gamut that colour gamut that considered light source predicts the outcome.Dotted line is represented based on by pressing the button the actual colour gamut of 905 color renderings that generate.
In the Lch space, the L-c plane shows 914 corresponding to the hue angle h that sets by bar 916.Show that to the a-b plane 913 is similar, solid line is represented desired color gamut, and dotted line is represented the actual colour gamut based on color rendering.In first embodiment, when reference 3D demonstration 912, demonstration 913 of a-b plane and L-c plane show at 914 o'clock, and the user can adjust the colour gamut of the color rendering in the L-c plane demonstration 914 by using the input unit (not shown).This adjustment result reflected rapidly and be presented at the a-b plane show 913 and the Lab space in 3D show on 912.Notice that Fig. 9 shows the user and adjusts to widen the example of colour gamut.Along with this is adjusted, the colour gamut of the color rendering in a-b plane demonstration 913 also becomes and approaches desired color gamut.
In first embodiment,, show such as image formation characteristics corresponding to the desired color gamut of light source based on the color rendering of the medium B of automatic generation.If this user who has checked such as the display characteristic of desired color gamut imports indication, then can indicate the described color rendering of any adjustment according to the user.
(the color reprodubility table generates and handles)
With reference to the processing of the generation among flowchart text first embodiment of Figure 10 to the color reprodubility table of each medium maintenance.Color reprodubility table among first embodiment comprises the measured color value of the tone color lump of the tone of representing the single ink color on the medium, with the measured color value of the secondary colour color lump of representing whole color printing ink, and described color reprodubility table keeps the information about reproducible colour gamut.
In step S1001, input parameter.This parameter is the data of quantity and spacing of the grid in total painted dosage restricted information, ink color space such as medium B.In step S1002, after whole primary colors generated, only the primary colors that can print because total painted dosage falls into total painted dosage restriction it generated color lump.The back will be described color lump and generate the details of handling.In step S1003, be printed on the described color lump that generates among the step S1002 to measure this color.
In step S1004, whether the primary colors color lump that self check is printed is suitable.
In step S1005, the self-detection result of determining step S1004.That is, be unsuitable if be judged as the primary colors color lump, show in step S1006 that then error message is with the message informing user with this result.Then, handle and to turn back to step S1001 with input parameter once more.
If be judged as test effect in step S1005 is " OK (good) ", that is, the primary colors color lump is suitable, then handles entering into step S1007 comes from step S1003 with input colour examining result.In step S1008, use the measured color value estimation because the spectral value of the primary colors that total painted dosage can not be printed above total painted dosage restriction.As a result, can obtain measured color value (being the spectral value of whole primary colors or grid point), finish the color reprodubility table.
In first embodiment, the color reprodubility table of generation can carry out the color prediction at place, the arbitrfary point in comprising the color space of primary colors.More particularly, when importing the signal value of the point that will predict,, carry out the color prediction, can export the spectral value of this point by using for example known cellularNeugebauer to handle based on the measured color value of this primary colors on every side in the color reprodubility table.
(color lump generates and handles)
Flowchart text primary colors color lump in step S1002 with reference to Figure 11 generates the details of handling.
In step S1101, the parameter based on such as the quantity of the quantity of the colouring agent of importing in step S1001 and grid generates whole primary colors and cuts apart the colouring agent color space equably.In step S1102, judge whether the color lump generation processing at whole primary colors finishes.Finish if color lump generates not handle, then handle entering into step S1103.In step S1103, judge whether primary colors to be processed falls into total painted dosage restriction.If primary colors falls into total painted dosage restriction, then in step S1104, generate the color lump data, handle then and enter into step S1105.If primary colors does not fall into total painted dosage restriction, then handle and directly enter into step S1105.
In step S1105, counter adds one, handles then to turn back to step S1102 next primary colors is carried out color lump generation processing.
If be judged as whole primary colors treated in step S1102, then processing finishes.As a result, only those primary colors that fall into total painted dosage restriction in whole primary colors are generated the color lump data.The color lump data that generate will be called as the primary colors color lump.
(check color lump)
Whether in order to check the primary colors color lump that generates with said method correctly to be printed, the first embodiment service test color lump carries out self check.Check color lump among first embodiment will be described now.
Figure 12 is the figure that illustrates with reference to the example of primary colors color lump under the situation of using cyan and carmine secondary colour and check color lump.In Figure 12, cut apart 4 frame lines between W, C, M and the C+M to obtain primary colors according to the quantity of grid.In this example, each frame line is divided into three parts equably at point 0,85,170 and 255 places.In Figure 12, note four primary colors 124,125,126 and 127.Primary colors 124,125 and 127 falls into the total painted dosage restriction shown in the dotted line, and primary colors 126 drops on outside total painted dosage restriction.That is symbol in Figure 12, ● expression falls into the primary colors that can print of total painted dosage restriction, and print each primary colors that can print and measure this color as the primary colors color lump.Symbol zero expression surpasses the primary colors that can not print of total painted dosage restriction.In first embodiment, based on symbol ● the primary colors color lump that falls into total painted dosage restriction of expression, by the color prediction processing, to the suitable spectral value of primary colors estimation that can not print.
The color predictive equation formula of the spectral reflectance factor R of the arbitrfary point of calculating in four primary colors 124,125,126 and 127 zones of being defined is as follows.Notice that F represents the development properties data of each colouring agent, and P represents the area ratio of each colouring agent.
R＝F×P
When obtaining the development properties of some primary colors, this color predictive equation formula is rewritten as:
F＝R×P
-1
Based on this equation, first embodiment use between the grid point in the color space the zone promptly, in Figure 12 with symbol ● the represented zone that primary colors defined (Examination region) that can print, as checking color lump.In Figure 12, an example of symbol △ representative check color lump.In first embodiment, predict the outcome based on the color of checking color lump, whether proving ring is suitably printed around four primary colors color lumps of described check color lump.The prerequisite of the check color lump among first embodiment is: print around whole four primary colors color lumps in total painted dosage restriction so that handle in (hereinafter will describe) in self check, based on four around the primary colors color lump, carry out color and predict.In the example of Figure 12,, actual use three zones as the check color lumps, each in described three zones whole four around primary colors (being called as peripheral primary colors hereinafter) by symbol ● represented.
(primary colors color lump self check processing)
Figure 13 is the flow chart that is illustrated in the details that the self check among the step S1004 of Figure 10 handles.As mentioned above, the self check among first embodiment is handled and is judged whether the primary colors color lump is suitably printed.For this purpose, the service test color lump is handled in self check.
In step S1301, will represent that its assay is initialized as 0 for the params-count of the quantity of the check color lump of " OK ".Then, setting can be set at the total quantity (total quantity of color lump) in the zone of check color lump.For example, in Figure 12, all can set color lump is nine zones that primary colors defines, and does not consider whether each primary colors can be printed.Each check color lump is carried out the following processing of step S1302 in the S1308.Counting processing to each check color lump is not described.
In step S1302, judge based on the total quantity of color lump whether whole check color lumps is all processed.If treated check color lump is all then handled and is entered into step S1310.If the check color lump is not all handled, then handle entering into step S1303.
In step S1303, search for check color lump to be processed peripheral primary colors on every side.In step S1304, whether the color lump of judging peripheral primary colors is by Print All.Even a color lump of peripheral primary colors is not printed, then current check color lump can not be used to check.Therefore, in step S1309, set next check color lump, and processing turns back to step S1302.
If the color lump that is judged as the peripheral primary colors of checking color lump in step S1304 by Print All, then checks color lump can be used to check, processing enters into step S1305 and makes counting increase by 1 then.In step S1306,, obtain color predicted value, the Lab value of promptly corresponding described check color lump (actual measurement Lab value) by known cellularNeugebauer processing based on the actual measured value of peripheral primary colors color lump
In step S1307, calculate testing accuracy Δ E, as the actual measurement Lab value of the check color lump of having predicted among the step S1306 and the difference between its corresponding theory Lab value.Based on the theoretical value of primary colors color lump on every side, can calculate the theoretical L ab value of the check color lump of reference in accuracy computation.The theoretical L ab value of check color lump can also precompute and be held when for example generate whole primary colors.
In step S1308, Δ E and predetermined threshold value (for example, 5.0) are compared.If Δ E, thinks then that the testing accuracy of check color lump is enough high less than predetermined threshold value.Then, processing enters into step S1309 to handle next check color lump.If Δ E more than or equal to predetermined threshold value, then checks the theoretical L ab value of color lump and actual measurement Lab value to keep off each other, that is, think that testing accuracy is lower.In step S1311, set " NG (bad) " as assay, and set error message at this result.Then, processing finishes.
In step S1310, judge whether counting is 0, that is, whether there is at least one check color lump to be checked fully.If counting is 0, then be judged as the check failure of check color lump.Processing enters into step S1312 setting NG as assay, and sets error message at this result.Then, this processing finishes.
If counting is not 0 in step S1310, then checks successfully and finish.Described processing enters into step S1313 setting OK as assay, and finishes.
As mentioned above, according to the color processing method of first embodiment, when generating the color reprodubility table at each medium, the primary colors that the measured color value of the primary colors color lump that self check can be printed can not be printed with estimation.Therefore, can obtain the optimum measured color value of the whole primary colors in the color reprodubility table.By using the color reprodubility table to carry out the color prediction, can generate optimum color rendering.
For example, when generating optimum second color rendering of second medium automatically by the first existing color rendering that uses first medium, according to the first color reprodubility information and the second color reprodubility information (color reprodubility table), use the color prediction can make the second color rendering optimization.
＜the second embodiment 〉
Above-mentioned color prediction processing is with reference to the medium that uses has been defined the color reprodubility table of the spectral value of each primary colors.Described color reprodubility table with reference to Figure 22 and 23 explanation references in the color prediction processing.
Figure 22 is the figure that the example of the primary colors that can print He can not print when using two kinds of printing ink cyans (C) and carmetta (M) is shown.In Figure 22, the frame line of cutting apart between 4 W (in vain), C, M and the C+M according to the quantity (being three in this example) of grid obtains primary colors.At the top of Figure 22, symbol ● expression falls into the primary colors that can print of the total painted dosage restriction that dotted line represents, respectively the primary colors that can print is formed as colouring agent and predicts color lump.Symbol zero expression surpasses (promptly immeasurable) primary colors that can not print of total painted dosage restriction.When putting 1501 during,, carry out the calculating (color prediction) of the spectroscopic data corresponding with the painted dosage of use based on the primary colors 1502,1503,1504 and 1505 of four nearest points around the point 1501 as the color target of prediction.In the top of Figure 22, the primary colors 1502,1504 and 1505 in these four points falls within total painted dosage restriction, and primary colors 1503 drops on outside total painted dosage restriction.
According to conventional method, shown in Figure 22 Lower Half, the primary colors 1503 that drops on outside total painted dosage restriction is carried out linearity correction, make it fall into total painted dosage restriction.By using the primary colors of revising, form color prediction color lump to generate the color reprodubility table.
Figure 23 illustrates traditional color prediction color lump data to generate the flow chart of handling.In step S1601, the quantity of input colouring agent and the quantity of grid.In step S1602, the colouring agent space is cut apart equably to generate color prediction primary colors and their color lump data.In step S1603, the color lump data of color prediction primary colors are revised so that it falls into total painted dosage restriction.In step S1604, print and measure the whole color prediction color lump data that comprise revised color lump data.
Yet the color reprodubility table generates to handle and has following problem.When coming linearity to revise primary colors according to total painted dosage restriction, lose with the linear relationship of peripheral primary colors, reduced the predictability of color.In addition, if the quantity of the colouring agent that uses increases, then the quantity of primary colors and print load also increase.
For fear of this point, in a second embodiment, when predicting the color reprodubility of simulating mixed colorant,, also can realize suppressing to predict the high accuracy color prediction of color lump print load even the quantity of the colouring agent that uses increases by color.
Similar to first embodiment, second embodiment allows the user via UI the color rendering of the automatic medium B that generates in aforesaid way to be adjusted arbitrarily.Can also make described color rendering optimization according to the variation of light source.
Figure 16 is the figure that the example of color rendering adjustment UI among second embodiment is shown.In Figure 16, square frame 1200 is used for selecting light source, and square frame 1201 is used for the color rendering of input media A, and square frame 1202 is used for the printing ink application quantity restricted information of input media B.Square frame 1203 is used for the ink characteristics of color prediction of input media B.In the case, the performance data of printing ink and medium is the tone color lump of single color and the secondary colour color lump of whole color printing ink.
3D shows that 1212 show the color rendering data that passing through in the 3DLab space presses the button the 1204 and 1205 medium B that generate.
Show that from 3D 1212 extract a-b plane demonstration 1213.Use bar 1215 to set the L value, the a-b plane shows its a-b plane at the profile of L value incision of 1213 expressions.Show on 1213 that on the a-b plane solid line is illustrated in by pressing the button the desired color gamut that 1204 colour gamuts that generate and that considered light source predict the outcome.Dotted line is represented based on the actual colour gamut that presses the button 1205 color renderings that generate.
The L-c plane show 1214 with the Lch space in corresponding by the hue angle h that adjusts bar 1216 settings.Show that to the a-b plane 1213 is similar, solid line is represented desired color gamut, and dotted line is represented the actual colour gamut based on color rendering.In a second embodiment, show 1212 at reference 3D, when demonstration 1213 of a-b plane and L-c plane showed 1214, the user can adjust the colour gamut that the L-c plane shows the color rendering on 1214 by using the input unit (not shown).Described adjustment result reflected rapidly and be presented at the a-b plane show 1213 and the Lab space in 3D show on 1212.
Figure 17 shows the user adjusts the demonstration after the colour gamut that the L-c plane shows the color rendering on 1214 in UI shown in Figure 16 example.In Figure 17, be adjusted at actual colour gamut that the L-c plane shows the color rendering that dotted line on 1214 is represented with near the represented desired color gamut of solid line.In company with it together, the a-b plane shows that the colour gamut of the color rendering on 1213 is also near desired color gamut.In other words, the user adjusts to widen colour gamut.
In a second embodiment, according to the color rendering of the medium B of automatic generation, show and the corresponding image formation characteristics of light source such as desired color gamut.If (for example, desired color gamut) user imports indication to the inspected characteristics showed, then can adjust color rendering arbitrarily according to this user's indication.
(the color reprodubility table generates and handles (by the primary colors estimation of color prediction))
Be generated as the processing of the color reprodubility table of each medium maintenance in a second embodiment with reference to Figure 18 and 19 explanations.
Figure 18 illustrates when using two color printing ink C and M, is used for the figure of example that the color reprodubility table generates the color lump data (primary colors) of the color prediction of handling in a second embodiment.In Figure 18, cut apart 4 frame lines between W, C, M and the C+M to obtain primary colors according to the quantity (then is three at present embodiment) of grid.In Figure 18, symbol ● expression falls into the primary colors that can print of the total painted dosage restriction of dotted line indication, and form each primary colors that can print and predict color lump as color.Symbol ◆ expression surpasses the primary colors of total painted dosage restriction, thereby estimated in a second embodiment.When will putting 1101 during as the color target of prediction, the primary colors 1102,1103,1104 and 1105 based on four nearest points around 1101 carries out the calculating (color prediction) of the spectroscopic data corresponding with the painted dosage of use.In Figure 18, the primary colors 1102,1104 and 1105 in these 4 has fallen into total painted dosage restriction, so the actual color lump of printing is to measure this color.Though primary colors 1103 drops on outside total painted dosage restriction, the measured value that is based on remaining three points has been estimated suitable spectroscopic data.Therefore, second embodiment can not carry out linear the correction so that the primary colors that drops on outside total painted dosage restriction falls into wherein, and is based on the measured value of estimated value and other primary colors, puts 1101 color prediction by non-linear conversion.
In a second embodiment, based on the measured value of the primary colors color lump that falls into the restriction of colouring agent use total amount, make estimation with the following method owing to drop on the spectroscopic data of the primary colors that can not print outside total painted dosage restriction.Allow F as the development properties data of each colouring agent, P is given in the some color predictive equation formula of the spectral reflectivity R at 1101 places as the area ratio of each colouring agent:
R＝F×P
When the development properties of obtaining some primary colors (spectroscopic data), this color predictive equation formula is rewritten as
F＝R×P
-1
For example, obtain spectral reflectivity R, and be the above-mentioned equation of base application with spectral reflectivity R at point 1101 places based on three points (falling into the primary colors 1102,1104 and 1105 of total painted dosage restriction) of point around 1101.
Figure 19 illustrates the flow chart that the generation of color reprodubility table is handled among second embodiment.When generating the color reprodubility table, second embodiment predicts based on above-mentioned color and carries out the primary colors estimation.Color reprodubility table among second embodiment comprises measured color value and whole measured color values of the secondary colour color lump of color printing ink of the tone color lump of the single ink color on the medium, and this color reprodubility table keeps the information about reproducible colour gamut.
In step S1201, the quantity of input colouring agent and the quantity of grid.Step S1202 is that color lump generates step, and wherein the colouring agent space is cut apart equably to generate color prediction primary colors and color lump data thereof.In step S1203, judge whether color prediction color lump data fall into total painted dosage restriction.If color prediction color lump data fall into total painted dosage restriction, then handle and transfer to step S1204.Only print fall into total painted dosage restriction color prediction color lump data to measure this color, obtain the color rendering value.Drop on outside total painted dosage restriction if in step S1203, be judged as color prediction color lump data, then handle and transfer to step S1205.Use falls into the measured color value of the color prediction color lump data of restriction, drops on the measured color value of the color prediction color lump data outside the restriction with said method estimation.Therefore, can obtain measured color value (that is, the spectral value of the primary colors of total-grid point), finish the color reprodubility table.
As mentioned above, when calculating the development properties (color reprodubility table) of colouring agent, the primary colors that second embodiment can not print by color prediction estimation based on the primary colors that can print.In the minimized while of the quantity of the primary colors that makes printing,, make the primary colors that to print fall into total painted dosage restriction by forbidding linear the correction to increase the color predictability.As a result, can generate better color reprodubility table.When using existing first color rendering at first medium to generate second color rendering at the optimum of second medium automatically, can make based on the color of the first color reprodubility information and the second color reprodubility information (color reprodubility table) and predict optimization.And, can realize easily that being used for operating automatically color rendering generates the interface of handling.
＜the three embodiment 〉
Now a third embodiment in accordance with the invention will be described.The 3rd embodiment refers to the processing that generates the configuration file (profile) that is suitable for medium B by the color rendering that uses the medium B that generates according to second embodiment.
Figure 20 illustrates the flow chart that the configuration file generation is handled among the 3rd embodiment.In step S2001, obtain based on the performance data of medium B and predict the color reprodubility table that generates by the color of describing in a second embodiment, that is, and the performance data of medium and colouring agent.The performance data of medium and colouring agent is the secondary colour color lump of the tone color lump of single color printing ink and all printing ink of using.
In step S2002, be used as the maximum gamut of the medium B of print paper based on the color rendering prediction of medium B.In step S2003, obtain object color component and reproduce data (Lab value).In step S2004, based target color rendering data generate the match colors configuration file of the value of definition from rgb space to the conversion of Lab value.In step S2005, generate printing ink color separation configuration file based on the match colors tag file.
To the advantage of the configuration file that generates be described in the 3rd embodiment.According to traditional configuration file generation method, after generating color rendering, the measured color value of color rendering is replaced as the match colors input, and carries out coupling by using near 4 tetrahedron interpolation of desired value.Figure 21 A is the figure that the example that mates by traditional tetragonal body interpolation is shown.In this example, on the a-b plane, draw colour of skin target 1405 is arranged.Use the tetrahedron interpolation to calculate and target 1405 corresponding points.More particularly, use four points 1400,1401,1402 and 1403 to carry out the tetrahedron interpolation, acquisition point 1406 is as interpolation result.Yet point 1406 and target 1405 have big aberration Δ E (for example, because tetrahedron interpolation precision, so Δ E〉3).Because the match colors result has only considered the aberration with target, therefore revise aberration and can make the smoothness of printing ink value variation impaired.This can generate intends like profile.
According to the configuration file generation method of describing in the 3rd embodiment, the color rendering that the color prediction suitably generates that passes through based on describing among second embodiment can directly calculate the printing ink decomposition value from desired value.Therefore, can reduce aberration Δ E (for example, Δ E≤1) with target.Figure 21 B shows the example according to the coupling of the 3rd embodiment.Aberration between target 1405 and the point 1406 that calculates is less, and matching precision is higher than the precision in the traditional coupling shown in Figure 21 A.
As mentioned above, by using the color rendering of describing among second embodiment by the generation of color forecasting institute, the 3rd embodiment can generate more high-precision color profile.
In first to the 3rd embodiment, adopt the Lab space as the color space.Yet also can use other space.
The 202 color prediction processing that are accompanied by the generation of color rendering that use a computer are carried out this processing but also can use such as the hardware of color prediction engine.
＜other embodiment 〉
Notice that the present invention can be applied to device that comprises single equipment or the system that comprises a plurality of equipment.
And then the present invention can realize in the following manner: directly or indirectly provide the software program of the function that has realized the foregoing description to system or device, and read and carry out the program code that is provided by the computer of described system or equipment.In the case, as long as this system or equipment has the function of this program, then execution mode needn't rely on program.
Therefore, because function of the present invention can be by computer realization, so the program code of installing has on computers also been realized the present invention.In other words, claim of the present invention also contains to realize that function of the present invention is the computer program of purpose.
In the case,, then can realize this program in any form as long as described system or device have the described function of described program, for example, program that object code, decipher machine are carried out or the script data that offers operating system.
The example that can be used to provide the recording medium of described program is: floppy disk, hard disk, CD, magneto optical disk, CD-ROM, CD-R, CD-RW, tape, non-volatile type storage card, ROM and DVD (DVD-ROM and DVD-R).
For the method that described program is provided, can be connected to the website on the internet by the browser that uses client computer, and the compressed file that can install automatically of computer program of the present invention or this program can be downloaded on the storage medium such as hard disk.In addition, described program of the present invention can also provide in the following manner: the program code that will constitute described program is divided into a plurality of files, and downloads these files from different websites.In other words, claim of the present invention also contains: realize the world wide web (www) server of functional programs file of the present invention for a plurality of user's download.
Can also and store on the recording medium such as CD-ROM program encryption of the present invention, then this recording medium is issued a plurality of users, the user who allows to satisfy certain requirement by the Internet from the website, download decryption key information, and allow these users encrypted program to be deciphered, thereby this program is installed on the subscriber computer by using this key information.
Realize the above-mentioned functions according to described embodiment except carry out the program read by computer, the operating system of moving on this computer etc. also can be carried out the some or all of of actual treatment, makes it possible to realize by this processing the function of the foregoing description.
In addition, after the program that will read from storage medium writes the expansion board of inserting computer or is arranged on memory the functional expansion unit that is connected to computer, be installed in CPU in this expansion board or the functional expansion unit etc. and carry out the some or all of of actual treatment, make and handle the function that realizes the foregoing description by this.
Though invention has been described with reference to exemplary embodiment, should be understood that the present invention is not limited to disclosed exemplary embodiment.Should give the most wide in range explanation to the scope of claim, to comprise all variants, equivalent structure and function.
Claims (5)
1. a measured color value that is used to use the color lump of printing on medium generates the color processing method of color rendering, and this color rendering is used for view data is decomposed into the data of a plurality of colouring agents, and described color processing method may further comprise the steps:
Obtain total colouring agent quantitative limitation information at medium;
Generate total painted dosage and fall into the represented restriction of described restricted information and be positioned at by cutting apart the color lump at the grid point place that the color space corresponding with a plurality of colouring agents obtain, and generate by described grid point around the color lump at some place;
Obtain measured color value by the color of measuring the described color lump of printing on the described medium;
Based on the color predicted value between the grid point, judge whether the described measured color value that obtains at described obtaining step is suitable;
When in described determining step, judging that described measured color value is suitable,, estimate that total painted dosage surpasses the measured color value at the grid point place of the represented restriction of described restricted information based on described measured color value; And
Based on described measured color value that in described obtaining step, obtains and the described measured color value in estimation steps, estimated, generate color rendering.
2. method according to claim 1, wherein determining step comprises:
When the whole described color lump printed around the described grid point place of Examination region, measured color value based on the described color lump at described grid point place, described Examination region between the described grid point is carried out color prediction, described Examination region comprise by described grid point around point;
The color that calculates described Examination region predict the outcome and obtained by described grid point around the measured color value of described color lump at described some place between difference as testing accuracy, and
Described testing accuracy and predetermined threshold are compared,
Be lower than under the situation of described threshold value at testing accuracy described in the described comparison step, judgement is suitable around the measured color value at the described grid point place of described Examination region, and
Be not less than under the situation of described threshold value at testing accuracy described in the described comparison step, judgement is unsuitable around the measured color value at the described grid point place of described Examination region.
3. method according to claim 2 wherein, in described Examination region color prediction steps, calculates the color predicted value by cellular Neugebauer processing.
4. method according to claim 1 also comprises the step that information is provided: judge that in described determining step described measured color value is under the unsuitable situation, it is improper information that described measured color value is provided.
5. a measured color value that is used to use the color lump of printing on medium generates the color processing apparatus of color rendering, and this color rendering is used for view data is decomposed into the data of a plurality of colouring agents, and described color processing apparatus comprises:
Obtain unit at total colouring agent quantitative limitation information of medium;
Generate total painted dosage and fall into the represented restriction of described restricted information and be positioned at by cutting apart the color lump at the grid point place that the color space corresponding with a plurality of colouring agents obtain, and generate by described grid point around the unit of color lump at some place;
Obtain the unit of measured color value by the color of measuring the described color lump of printing on the described medium;
Based on the color predicted value between the grid point, judge the unit that the described measured color value that obtains at described obtaining step is whether suitable;
When judging that in described determining step described measured color value is suitable,, estimate that total painted dosage surpasses the unit of measured color value at the grid point place of the represented restriction of described restricted information based on described measured color value; And
Based on described measured color value that in described obtaining step, obtains and the described measured color value in estimation steps, estimated, generate the unit of color rendering.
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| JP2007256008A JP2009089010A (en) | 2007-09-28 | 2007-09-28 | Color processing method and image forming apparatus |
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| JP2007306305A JP2009130842A (en) | 2007-11-27 | 2007-11-27 | Color processing method and image forming apparatus |
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| CN103426393B (en) * | 2013-06-21 | 2015-12-09 | 上海理工大学 | Display device color correcting method |
| CN103347142A (en) * | 2013-07-01 | 2013-10-09 | 上海理工大学 | Optimized color chart realization method based on color generation adaptation representation of digital equipment |
| JP6120184B2 (en) * | 2015-03-03 | 2017-04-26 | コニカミノルタ株式会社 | Chart creation control program, control device, and chart creation method |
| US9986106B2 (en) * | 2015-09-17 | 2018-05-29 | Fuji Xerox Co., Ltd. | Color patch generation apparatus and image forming apparatus, and non-transitory computer readable medium |
| CN113524919B (en) * | 2021-07-21 | 2022-05-03 | 深圳圣德京粤科技有限公司 | Ink-jet printing color management system, ink-jet printing method and equipment for starch food |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095212A1 (en) * | 2002-05-10 | 2003-11-20 | Canon Kabushiki Kaisha | Reproduction color prediction apparatus and method |
| EP1392050A2 (en) * | 2002-07-31 | 2004-02-25 | Canon Kabushiki Kaisha | Image processing method and image processing apparatus |
| EP1524844A2 (en) * | 2003-10-16 | 2005-04-20 | Agfa Corporation | Total ink amount control method for color rendering in printing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095212A1 (en) * | 2002-05-10 | 2003-11-20 | Canon Kabushiki Kaisha | Reproduction color prediction apparatus and method |
| EP1392050A2 (en) * | 2002-07-31 | 2004-02-25 | Canon Kabushiki Kaisha | Image processing method and image processing apparatus |
| EP1524844A2 (en) * | 2003-10-16 | 2005-04-20 | Agfa Corporation | Total ink amount control method for color rendering in printing system |
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| JP2009089010A (en) | 2009-04-23 |
| CN101399899A (en) | 2009-04-01 |
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