CN101465945A - Print control apparatus, print system and print control program - Google Patents
Print control apparatus, print system and print control program Download PDFInfo
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Abstract
The invention provides a printing control device capable of ensuring optical spectrum reproducibility and vision reproducibility, a printing system and a printing control program. A color difference delta E between a taget color value and a predetermined color value is calculated aiming at each light source, wherein the target color is a color value displayed by a color measurement data MD which is obtained by measuring color to a target TG under a plurality of light sources, the predetermined color value is a color value when a printer prints based on an ink quantity setting phi. When the color difference is calculated for each light source, each color difference is combined to calculate an estimation value E(phi), then the ink quantity setting phi is calculated as an optimal solution of the estimation value E(phi) minimum.
Description
Technical field
The present invention relates to print system and print control program, particularly relate to the print system and the print control program that are used to make the target reproduction.
Background technology
Proposed to be conceived to the printing process (referring to Patent Document 1) of spectrum reproducibility.In this patent documentation 1, in order to carry out printing all consistent on spectrum and colourity, use printing model with target image, and the combination of optimization printing color (CMYKOG), so that print according to the spectral reflectivity (target optical spectrum) of target.So, by printing based on this printing color (CMYKOG), can reproduce the target image of spectrum, its result also can obtain the print result of high chroma reproducibility.
Patent documentation 1: the special table of Japanese documentation 2005-508125 communique.
Summary of the invention
But the kind that can be used on the ink isochrome material in the printing equipments such as printer is limited, thereby is difficult to that the spectral reflectivity to target carries out correct reproduction in all visible wavelength territories.Therefore, the match of spectral reflectivity does not sometimes reach sufficient degree, thereby exists the reproducibility of color to stay in the problem of inadequate state.Particularly, because also will be to almost the inoperative wavelength domain of people's vision being carried out the match of spectral reflectivity, the playback accuracy of the spectral reflectivity in the wavelength domain that the vision to the people cuts much ice is descended, so the problem of playback accuracy difference can be visually felt in existence.
In view of the above problems, the invention provides a kind of print system and print control program of not only having guaranteed the spectrum reproducibility but also having guaranteed visual rendition.
In order to address the above problem, the object color component value obtains the unit and obtain the object color component value that each color-values of being illustrated by target constitutes under a plurality of light source.Printing control unit is with reference to the look-up table of having stipulated the corresponding relation between the setting of described object color component value and described look material amount.Obtain the described look material amount setting corresponding thus, and this look material amount setting is assigned to described printing equipment and makes it carry out printing with described object color component value.In described look-up table, reproduced on the described recording medium when having stipulated described look material amount setting and having carried out printing in that this look material amount setting is assigned to described printing equipment, and each light source under the high described object color component value of each color-values approximation between corresponding relation.Be provided with according to described look material amount, can obtain the good print result of visual rendition under each light source.In addition, by based on not only with single light source but can realize that the described look material amount of approximation is provided with the described object color component value under a plurality of light sources and print, can realize the also similar printing of reproducibility of spectral reflectivity.
Described object color component value obtains the unit and both can shine described a plurality of light source handle to described target by reality and carry out colour examining and obtain described object color component value, also can wait from user be received in that the color-values as target is used as described object color component value under a plurality of light sources.In addition, also can measure the spectral reflectivity of described target, and by calculating the color-values that obtains when this spectral reflectivity shines each light source.In addition, described printing equipment is so long as can get final product the device that a plurality of described look materials are attached on the described recording medium at least, and the present invention can be applied to various printing equipments such as ink-jet printer, laser printer and distillation formula printer.
In addition, preferred example as described evaluation of estimate, can use based on described object color component amount and prediction color-values under each light source aberration and the value calculated, this prediction color-values is predicted to be dismissible by described printing equipment and is reproduced in color-values on the described recording medium based on described look material amount.In addition, as a preferred example, can with to described object color component value and described prediction color-values the aberration under each light source carry out linear combination and value as described evaluation of estimate.So, can overall merit with respect to the approximation of the described desired value under a plurality of light sources.In addition, when described evaluation of estimate was calculated in the aberration linear combination under each light source, preferred way was to make the weight of each light source adjustable.Can strengthen or weaken attention degree thus to the described object color component value under the specific light source.
In addition, when the described prediction color-values of prediction, can dope the spectral reflectivity that described printing equipment reproduces on described recording medium based on described look material amount setting in advance, as the prediction spectral reflectivity, calculate the color-values when this prediction spectral reflectivity shines each light source then, as described prediction color-values.So, can easily calculate color-values under a plurality of light sources.In addition, as optimal way, except that described object color component value, can also obtain the unit by the target optical spectrum reflectivity and obtain the spectral reflectivity of described target and be used as the target optical spectrum reflectivity, and towards making with the approximate isochrome function of described target optical spectrum reflectivity to the contribution of prediction color-values greater than the described prediction color-values of the direction calculating of other isochrome functions.So, can improve the reproducibility that described target optical spectrum reflectivity is got the spectral reflectivity in the wavelength domain of higher value.
In addition, technological thought of the present invention not only realizes that by concrete print control also the method for can be used as realizes.That is, the present invention also can be defined as a kind of method, this method comprise undertaken by above-mentioned print control with the corresponding step in each unit.Certainly, when realizing above-mentioned each unit by the above-mentioned print control fetch program, can certainly carry out the functional programs corresponding or record realization technological thought of the present invention in the various recording mediums of this program with this each unit.In addition, print control of the present invention is not only single device, also can disperse to exist by multiple arrangement.For example, each unit that print control had can disperse to be present in the middle of the two of printer driver of carrying out on the personal computer and printer.In addition, also each unit pack in the print control of the present invention can be contained in the printing equipments such as printer.
Description of drawings
Fig. 1 is the block diagram that the hardware configuration of print control is shown;
Fig. 2 is the block diagram that the software configuration of print control is shown;
Fig. 3 illustrates the flow chart that printed data generates the flow process of handling;
Fig. 4 is the figure that an example of UI picture is shown;
Fig. 5 is the figure that has constituted the object color component value;
Fig. 6 is the figure that explanation is used for calculating based on spectral reflectivity the calculating of color-values;
Fig. 7 is the figure that printed data is shown;
Fig. 8 is the figure that concordance list is shown;
Fig. 9 is the flow chart that the overall procedure of printing control and treatment is shown;
Figure 10 illustrates the flow chart that 1D-LUT generates the flow process of handling;
Figure 11 is the schematic diagram that the flow process of the processing that the optimization quantity of ink is provided with is shown;
Figure 12 is the schematic diagram that the situation that the quantity of ink setting is optimised is shown;
Figure 13 is the figure that 1D-LUT is shown;
Figure 14 illustrates the flow chart that the printing control data generates the flow process of handling;
Figure 15 is the figure that 3D-LUT is shown;
Figure 16 is the schematic diagram that the mode of printing of printer is shown;
Figure 17 is the figure that the spectral reflectance data storehouse is shown;
Figure 18 is the figure that spectrum knob Jie fort model is shown;
Figure 19 illustrates the figure that You Er-Nelson's spectrum knob Jie fort model is cut apart in the unit;
Figure 20 is the schematic diagram of the prediction color-values that relates to of explanation variation;
Figure 21 is the schematic diagram that the weighting function that variation relates to is shown;
Figure 22 is the figure of the evaluation of estimate that relates to of explanation variation;
Figure 23 is the figure that the software configuration of the print system that variation relates to is shown;
Figure 24 is the figure that the software configuration of the print system that variation relates to is shown;
Figure 25 is the figure that the UI picture that variation relates to is shown;
Figure 26 is the figure that the HSV space is shown;
Figure 27 is the figure that the UI picture that variation relates to is shown.
Embodiment
Below, according to following order embodiments of the present invention are described.
1. the structure of print control:
2. printed data generates and handles:
3. printing control and treatment:
3-1.1D-LUT generates processing:
3-2. printing control datas generate to be handled:
4. spectrum printing model:
5. variation:
5-1. variation 1:
5-2. variation 2:
5-3. variation 3:
5-4. variation 4:
5-5. variation 5:
5-6. variation 6:
5-7. variation 7:
1. the structure of print control:
Fig. 1 shows the hardware configuration of the print control of one embodiment of the present invention.In this Fig. 1, print control mainly is made of computer 10, and computer 10 comprises CPU 11, RAM12, ROM 13, hard disk drive (HDD) 14, general-purpose interface (GIF) 15, video interface (VIF) 16, input interface (IIF) 17 and bus 18.Bus 18 is used to realize to constitute the data communication between each member 11～17 of computer 10, and communication is not controlled by there being illustrated chipset to wait.Store the routine data 14a that is used for carrying out the various programs comprise operating system (OS) in HDD14, CPU 11 launches under the situation of this routine data execution according to the computing of this routine data 14a in RAM 12.It is the interface of benchmark that GIF 15 for example is used to provide with the USB specification, is connected on the computer 10 with printer 20 and colour examining device 30 with the outside.VIF 16 is provided for being connected to computer 10 on the outside display and the interface of display image on display 40.IIF17 is provided for that computer 10 is connected to outside keyboard 50a and mouse 50b goes up and obtain interface from the input signal of keyboard 50a and mouse 50b by computer 10.
Fig. 2 shows the software configuration of the program of being carried out by computer 10 and the summary of data flows to.In this Fig. 2, the main OS of execution P1, sample printing application program (APL) P2,1D-LUT generate application program (LUG) P3a, printed driver (DDV) P3b, colour examining device driver (MDV) P4 and display driver (DDV) P5 in computer 10.OS P1 provides a kind of vision facilities interface (GDI) P1a and spool management device (spooler) P1b among the API that can use as each program, and the request according to APL P2 accesses GDI P1a, and accesses PDV P3b or DDV P5 according to the request of GDI P1a.GDIP1a is provided for the universal architecture of the image output in the image output devices such as computer 10 control printers 20, display 40, and PDV P3b or DDV P5 then provide the distinctive processing of machine of printer 20 or display 40 etc.In addition, spool management device P1b between API P2, PDV P3b and printer 20, the management of executing the task etc.APL P2 is the application program that is used for printing specimen figure SC.APL P2 generates the printed data PD of RGB bitmap format, and exports this printed data PD to GDI P1a.In addition, when generating printed data PD, obtain the colour examining data M D of target from MDV P4.Colour examining device 30 is controlled in the request of MDV P4 response APL P2, and will export to APL P2 by the colour examining data M D that this control obtains.
The printed data PD that APL P2 generates is exported to PDV P3b via GDI P1a and spool management device P1b, and PDV P3b carries out based on printed data PD and is used to generate exportable processing of giving the printing control data CD of printer 20.The printing control data CD that PDV P3b generates is exported to printer 20 via the spool management device P1b that OS P1 is provided, and printer 20 moves based on this printing control data CD, thus sample figure SC is printed on the printing paper.Below understand the flow process of entire process in brief, below, use flow chart to explain the processing of carrying out by program P1～P4.
2. printed data generates and handles
Fig. 3 shows the printed data of being carried out by APL P2 and generates the flow process of handling.As shown in Figure 2, APL P2 comprises the P2a of UI portion (UIM), measures control part (MCM) P2b, printed data generating unit (PDG) P2c, carries out each step shown in Figure 3 by above-mentioned each module P2a, P2b, P2c.In step S100, UIM P2a shows the UI picture that is used for accepting representing the printing indication of printing specimen figure SC via GDI P1a and DDV P5.In described UI picture, be provided with the demonstration of the model that sample figure SC is shown.
Fig. 4 shows an example of described UI picture.In this Fig. 4, show described model TP, in this model TP, be provided with 12 frame FL1～FL12 that are used to dispose colour code (colour patch).Can be by clicking each frame FL1～FL12 that selects in the described UI picture with mouse 50b, when having clicked frame FL1～FL12, will show the selection window W that is used to indicate whether to begin colour examining.In addition, in described UI picture, also be provided with the button B that is used to indicate whether carry out the printing of sample figure SC.In step S110, detect the click of mouse 50b by UIM P2a to each frame FL1～FL12, when detecting click, show the selection window W that is used to indicate whether to begin colour examining by step S120.In step S130, detect the click of mouse 50b in selecting window W, when having clicked cancellation, return step S110.On the other hand, when having clicked the execution colour examining, in step S135, be used to guide the demonstration of colour examining by UIM P2A.In the present embodiment, owing to need under 5 kinds of D50 light source, D55 light source, D65 light source, the A light source of incandescent lamp system and the F11 light source of fluorescent lamp system of spectrum (the standard day) light sources, carry out colour examining to a target TG, thereby the guiding user, make it change light source and carry out colour examining successively.
In the present embodiment, the target TG of colour examining refers to the body surface as the target of reproducing at spectrum, for example is printing equipment and the artificial body surface that forms such as application device and the surface of natural thing etc. by other.In step S140, certain target TG is shone five kinds of light sources successively and carries out colour examining.At this moment, MCM P2b obtains the colour examining data M D that comprises five kinds of measured color values (target measured color value) from MDV P4 at single target.Each object color component value preferably obtains in absolute color space, in the present embodiment, obtains the L in the CIELAB color space
*a
*b
*Value is with as the object color component value that comprises colour examining data M D.In addition, use predetermined RGB characteristic file (profile) to convert rgb value to, obtain this rgb value as demonstration RGB as the object color component value under the D65 light source of the light source of standard.The RGB characteristic file is a characteristic file of having stipulated the isochrome relation between the rgb color space of CIELAB color space and present embodiment, for example can use the ICC characteristic file.
In step S145, in model TP, clicked frame FL1～FL12 is updated to described demonstration and is coated with full demonstration with rgb value.Thus, can come at the color of sensuously grasping as the target TG under the D65 light source of standard sources by the UI picture.After step S145 finishes, in step S150, generate distinctive index, and the colour examining data M D corresponding stored that this index, described demonstration are formed with the positional information of rgb value and frame FL1～FL12 of clicking and by 5 object color component values is in RAM 12 in step S110.After finishing, step S150 turns back to step S110, repeated execution of steps S120～S150.Thus, can select other frame FL1～FL12, and other frame FL1～FL12 is carried out the colour examining of other targets TG.In the present embodiment, suppose 12 kinds of target TG1～TG12 that prepared to differ from one another, and at each target TG～TG12, obtain five kinds of object color component values under the light source with as colour examining data M D.Therefore, in step S150,, in RAM, store the data that will be mapped with rgb value successively by colour examining data M D, distinctive index and the demonstration that 5 object color component values are formed at each frame FL1～FL12.In addition, index both can generate by increment as long as being made as distinctive mode with general's value separately generates, and also can generate by unduplicated random number.
Fig. 5 shows the situation that marks about the resulting object color component value of certain target TG in the CIELAB color space.As shown in Figure 5, even when single target TG is carried out colour examining, the light source in the time of also can be according to colour examining is obtained different object color component values.So, the phenomenon that the object color component value is different under a plurality of light sources is called as metamerism, and each target TG all has different metamerism characteristics.This metamerism depends on the spectral reflectivity R (λ) that each target has, even under certain light source, obtained two targets of same target color-values, as long as spectral reflectivity R (λ) difference will demonstrate different object color component values under other light source.
Fig. 6 has illustrated the situation that obtains the measured color value under a plurality of light sources from the target TG with certain spectral reflectivity.For example, as shown in Figure 6, certain target TG has uneven target optical spectrum reflectivity R in whole visible wavelength territory
t(λ) distribute.On the other hand, each light source has different separately spectral energy P (λ) and distributes, and the catoptrical spectral energy of each wavelength when target TG irradiation D65 light source is with target optical spectrum reflectivity R at each wavelength
t(λ) value that multiplies each other with spectral energy P (λ).In addition, use and people's the corresponding isochrome function of spectral sensitivity characteristic x (λ), y (λ), z (λ) carry out convolution integral to the spectrum of catoptrical spectral energy respectively, carry out normalization by coefficient k, can access tristimulus values X, Y, Z thus.When being formulated as shown in the formula shown in (1).
[formula 1]
X＝k∫P(λ)R
t(λ)x(λ)dλ
Y＝k∫P(λ)R
t(λ)y(λ)dλ …(1)
Z＝k∫P(λ)R
t(λ)z(λ)dλ
By using predetermined change type conversion tristimulus values X, Y, Z, can access L as color-values
*a
*b
*Value.As mentioned above, at the time point of the spectrum of catoptrical spectral energy, can produce different spectrum according to each light source, therefore, the object color component value that finally obtains is also as shown in Figure 5 according to light source and difference.
In step S110, when not detecting each frame FL1～FL12 when clicked, detect the click of button B that the printing of sample figure SC is carried out in expression by step S160, return step S110 when clicking when not detecting.On the other hand, when detecting expression and carry out the click of button B of printing of sample figure SC, in step S170, PDG P2c generates printed data PD.
Fig. 7 shows the structure of printed data PD.Among this figure, printed data PD is made of a large amount of pixels that are arranged in a formation, and each pixel all has the information of 4 bytes (8 bits * 4).Printed data PD represents the image identical with model TP shown in Figure 4, and the pixel outside the zone corresponding with each frame FL1～FL12 of model TP has the rgb value with the corresponding color of model TP.The tone value of each passage of RGB shows by 8 bytes (256 grades) respectively, and 3 bytes in 4 above-mentioned bytes are used to store rgb value.For example, color beyond each frame FL1～FL12 of model TP is with (R, G, B)=(128,128, when 128) so the same middle gray is expressed, pixel beyond the zone corresponding among the printed data PD with each frame FL1～FL12 just have (R, G, B)=(128,128,128) color information.In addition, Sheng Xia 1 byte is not used.
On the other hand, the pixel corresponding with each frame FL1～FL12 of model TP also has 4 bytes, uses 3 bytes of storage rgb value to store index usually.This index is the distinctive information that is generated according to each frame FL1～FL12 by step S150, and PDG P2c obtains index from RAM 12, and preserves and corresponding to the corresponding index of pixel of each frame FL1～FL1.For with as above-mentioned replacement rgb value and the corresponding pixel of each frame FL1～FL1 of having stored index uses remaining 1 byte that the mark that index has been preserved in expression is set.Thus, can differentiate each pixel has stored rgb value or has stored index.In the present embodiment, owing to can use 3 bytes to store index, therefore, needing to generate in step S150 in advance can be with the index of 3 amount of information performances below the byte.If as the above-mentioned printed data PD that can generate bitmap format, in step S180, PDG P2c will generate concordance list IDB.
Fig. 8 shows the example of concordance list IDB.In the figure, at each distinctive index of corresponding generation with each frame FL1～FL12, the object color component value of each light source that obtains by colour examining and the demonstration rgb value corresponding have been preserved with the object color component value under the D65 light source.After the generation of concordance list IDB finished, printed data PD was exported to PDV P3b via P1a, spool management device P1a etc.Therefore printed data PD also can handle with common print job in GDI P1a, the spool management device P1b etc. that OS P1 provided in the same manner owing to as broad as long with common RGB bitmap format in shape.On the other hand, concordance list IDB is directly exported to PDV P3b.In the present embodiment, regenerated concordance list IDB, still, also can be in existing concordance list IDB additional record index, object color component value and show new corresponding relation with rgb value.In addition, above printed data generation processing and printing control and treatment described later do not need one to fix on execution continuously in the same device, for example can the generation of independent execution printed data handle and the printing control and treatment on a plurality of computers that connect by communication lines such as LAN, internets yet.
3. printing control and treatment
Fig. 9 shows the overall procedure of the printing control and treatment of being carried out by LUG P3a and PDV P3b.LUG P3a is responsible for 1D-LUT and generates processing (step S200), and PDV P3b is responsible for printing control data and generates processing (step S300).1D-LUT generates and handles promptly and can generate processing execution prior to the printing control data, also can generate to handle simultaneously with printed data and carry out.
3-1.1D-LUT generates processing
Figure 10 shows 1D-LUT and generates the flow process of handling.As shown in Figure 2, LUG P3a comprises that quantity of ink is provided with computing module (ICM) P3a, spectral reflectivity prediction module (RPM) P3a2, color computing module (CCM) P3a3, evaluation of estimate computing module (ECM) P3a4 and LUT output module (LOM) P3a5.In step S210, ICM P3a1 obtains concordance list IDB.In step S220, from concordance list IDB, select an index, and obtain and the corresponding colour examining data M of this index D.In step S230, ICM P3a1 calculates the processing that quantity of ink is provided with, and this quantity of ink setting can be reproduced the object color component value identical color represented with described colour examining data M D.At this moment, use above-mentioned RPM P3a, CCM P3a3 and ECM P3a4.
Figure 11 schematically shows the flow process that calculating can be reproduced the processing that the quantity of ink of the color identical with the represented object color component value of described colour examining data M D is provided with.RPM P3a2 is provided with the input of φ in response to the quantity of ink from ICMP3a1, and the spectral reflectivity R (λ) when prediction is provided with φ sprays ink on predetermined printing paper based on this quantity of ink by printer 20 is as prediction spectral reflectivity R
s(λ), and should predict spectral reflectivity R
s(λ) export to CCM P3a3.The printer 20 of present embodiment is an ink-jet printer, and it prints to the ink that printing paper sprays C (cyan), M (magenta), Y (yellow), K (black), 1c (light cyan), 1m (shallow magenta).Quantity of ink is provided with every kind of quantity of ink d that φ is meant the CMYKlclm ink of injection
C, d
M, d
Y, d
K, d
Lc, d
LmCombination.As long as specify quantity of ink that φ is set, just can predict the formation state of each ink dot on the printing paper, therefore, RPM P3a1 can calculate prediction spectral reflectivity R uniquely
s(λ).About the applied forecast model of RPM P3a2 (spectrum printing model), will be described in detail by the 4th joint.
Obtaining predicting spectral reflectivity R
s(λ), CCM P3a3 calculates to having this prediction spectral reflectivity R
sPrediction color-values during above-mentioned 5 light sources of object illumination (λ).Here, calculate the L of CIELAB color space
*a
*b
*Value is used as predicting color-values.Calculate shown in the flow process of prediction color-values and Fig. 6 and the above-mentioned formula (1) (with target optical spectrum reflectivity R
t(λ) be replaced as prediction spectral reflectivity R
s(λ) use) identical.That is, to prediction spectral reflectivity R
s(λ) multiply by the spectrum of the spectral energy of each light source, utilize the isochrome function to carry out convolution integral, and by tristimulus values is converted to L
*a
*b
*Value can calculate the L as the prediction color-values thus
*a
*b
*Value.Color-values is predicted in each calculating at 5 light sources, and this color output valve is exported to ECMP3a4.
ECM P3a4 calculates represented object color component value of described colour examining data M D and the aberration Δ E of prediction between the color-values at each light source.In the present embodiment, the colour difference formula according to CIE DE2000 calculates aberration Δ E (Δ E
2000).And the aberration of each light source is designated as Δ E
D50, Δ E
D55, Δ E
D65, Δ E
A, and Δ E
F11When the aberration of calculating each light source, be Δ E
D50, Δ E
D55, Δ E
D65, Δ E
A, and Δ E
F11The time, calculate evaluation of estimate E (φ) by following formula (2).
[formula 2]
E(φ)＝w
1ΔE
D50+w2ΔE
D55+w3ΔE
D65+w
4ΔE
A+w
5ΔE
F11…(2)
In above-mentioned formula (2), w
1～w
5Be the weight coefficient that is used to set the weight of each light source, in the present embodiment, by setting w
1=w
2=w
3=w
4=w
5Make the weight equalization.Evaluation of estimate E (φ) is along with the aberration Δ E in each light source
D50, Δ E
D55, Δ E
D65, Δ E
A, Δ E
F11The value that diminishes and diminish, and the measured color value with target and prediction color-values in each light source generally near its value with regard to more little character.The evaluation of estimate E that calculates (φ) is returned to ICM P3a1.Promptly constituted and exported arbitrarily by ICM P3a1 to RPM P3a2, CCM P3a3 and ECM P3a4 that quantity of ink is provided with φ, and finally returned the structure of evaluation of estimate E (φ) to ICM P3a1.ICMP3a1 is provided with the operation that φ obtains evaluation of estimate (φ) accordingly by repeating with quantity of ink arbitrarily, calculates the optimal solution that makes as the minimum quantity of ink φ of the evaluation of estimate E (φ) of purpose function.As the method for calculating this optimal solution, for example can use the non-linear best practice that is called gradient method.
Figure 12 schematically shows the situation that is optimised at the water yield φ of step S230 China and Mexico.Object color component value under shown each light source of target TG and the variation of the prediction color-values under each light source in the process that quantity of ink φ is optimised in the CIELAB color space shown in this figure.According to above-mentioned formula (2), because can be with the aberration Δ E under all light sources
D50, Δ E
D55, Δ E
D65, Δ E
A, Δ E
F11Diminish generally as optimized condition, so quantity of ink is provided with φ towards the aberration Δ E that makes under each light source
D50, Δ E
D55, Δ E
D65, Δ E
A, Δ E
F11The direction that diminishes gradually is optimised.Thus, can calculate the quantity of ink that can reveal again under what light source in office all with target TG similar in appearance φ is set by printer 20.In addition, optimized end condition both can be that quantity of ink is provided with the number of repetition that φ is updated, and also can be the threshold value of evaluation of estimate E (φ).
As mentioned above, in step S230, calculate after the quantity of ink that can reproduce the color identical with the shown object color component value of described colour examining data M D is provided with φ by ICM P3a1, in step S240, judge whether all selected mistake in step S220 of all index be recorded among the concordance list IDB, when all selected not out-of-date, return step S220, and select next index.Thus, can calculate the quantity of ink that can reproduce the color identical φ is set at all index with described object color component value.That is, can calculate the quantity of ink that can reproduce the color identical φ is set at generating all target TG1～TG12 that carried out colour examining among the step S140 that handles (Fig. 2) at printed data with the shown object color component value of described colour examining data M D.Calculated optimum quantity of ink when φ is set when judging in step S240 at all index, in step S250, LOM P3a5 generates 1D-LUT, and this 1D-LUT is exported to PDV P3b.
Figure 13 shows the example of 1D-LUT.In the figure, with each index corresponding stored optimum quantity of ink φ is set.That is, can prepare 1D-LUT, in this 1D-LUT,, put down in writing the quantity of ink that can reproduce with each target TG1～TG12 similar in appearance φ is set by printer 20 at each target TG1～TG12.After 1D-LUT was exported to PDV P3b, 1D-LUT generated to handle immediately and finishes, and generates processing (step S300) thereby carry out ensuing printing control data.
3-2. printing control datas generate to be handled:
Figure 14 shows the printing control data and generates the flow process of handling.As shown in Figure 2, PDV P3b comprises pattern discrimination module (MIM) P3b1, index translation module (ISM) P3b2, RGB modular converter (CSM) P3b3, semi-tone (half-tone) module (HTM) P3b4 and rasterizer module (RTM) P3b5.In step S310, pattern discrimination module (MIM) P3b1 obtains printed data PD.In step S320, MIM P3b1 selects a pixel from printed data PD.In step S330, MIM P3b1 judges whether be provided with the mark that index has been stored in expression in selected pixel.When judging when this mark is not set, in step S340, CSMP3b3 carries out the color conversion (color separation) of relevant this pixel with reference to 3D-LUT.
Figure 15 shows the example of 3D-LUT.Among this figure, 3D-LUT has described rgb value and quantity of ink is provided with φ (d on a plurality of standard coordinates of color space
C, d
M, d
Y, d
K, d
Lc, d
Lm) between the table of corresponding relation, CSM P3b3 obtains the corresponding quantity of ink of rgb value that is had with this pixel with reference to 3D-LUT φ is set.At this moment, about the rgb value that in 3D-LUT, does not have directly to describe, obtain corresponding quantity of ink φ is set by carrying out interpolation arithmetic.In addition, the generation method of 3D-LUT can adopt the Japanese documentation spy to open middle disclosed methods such as 2006-82460 communique.According to this communique disclosed method, the light source that can generate the reproducibility of the color under the specific light source, the contrast of reproducing look, graininess, reproduction look is all good generally 3D-LUT of dependence, colour gamut and ink duty ratio (ink duty) not.
On the other hand, be provided with expression in the selected pixel when having stored the mark of index when judging in step S330, in step S350, ISM P3b2 carries out color conversion (color separation) about this pixel with reference to 1D-LUT.That is, stored the pixel of mark of index and obtained index, and in 1D-LUT, obtained with the corresponding quantity of ink of index φ is set from being provided with expression.When in arbitrary step of step S340 or step S350, having obtained the ink amount of the setting φ of relevant this pixel, judge whether that in step S360 all pixels have been obtained quantity of ink is provided with φ.Here, have when not obtaining quantity of ink the pixel of φ being set, return step S320, select next pixel when also surplus.
By repeating above processing, can obtain quantity of ink to all pixels φ is set.When all pixels having been obtained quantity of ink φ is set, show to convert the printed data PD that all pixels is provided with the φ performance with quantity of ink to.As mentioned above, by being judged, each pixel uses among 1D-LUT and the 3D-LUT which, for with the corresponding pixel of frame F1～F12 of having preserved index, can obtain the quantity of ink that can be reproduced under each light source φ is set near the color of each target TG1～TG12, and for the pixel of having stored rgb value, the quantity of ink that can obtain the color rendering of the generating criteria (for example, paying attention to graininess etc.) that can realize based on 3D-LUT is provided with φ.
In step S370, HTM P3b4 obtains and with quantity of ink printed data PD that φ shows each pixel is set and carries out semi-tone and handle.HTM P3b4 carries out can using known color method or the error-diffusion method etc. passed when semi-tone is handled.Each pixel has the injection signal whether expression sprays each ink in the printed data PD that finishes the semi-tone processing.In step S380, RTM P3b5 obtains and finishes the printed data PD that semi-tone is handled, and carries out the processing that each scanning pattern and each nozzle to the print head that printer 20 is had distribute the injection signal among this printed data PD.As mentioned above, can generate the exportable printing control data CD that gives printer 20, and the printing control data CD that has added the required signal of control printer 20 is exported to spool management device P1b and printer 20.Thus, printer 20 sprays ink on printing paper, to form sample figure SC.
As the above-mentioned zone corresponding that is formed on the sample figure SC on the printing paper with frame FL1～FL12 in, can reproduce the color of each target TG1～TG12.Therefore in addition, the zone corresponding with frame FL1～FL12 is with the quantity of ink according to the object color component value of target TG1～TG12 under a plurality of light sources φ to be set to print, and can be reproduced under each light source the color near target TG1～TG12.Promptly, indoor when watching sample figure SC the zone corresponding with each frame FL1～FL12 color rendering at indoor color when watching target TG1～TG12, and outdoor when watching sample figure SC the color in the zone corresponding with each frame FL1～FL12 also can be reproduced in outdoor color when watching target TG1～TG12.That is, can make the sample figure SC that does not choose the observation light source.
In addition, as long as the last sample figure SC that has with the identical spectral reflectivity R of target TG1～TG12 (λ) that reproduces just can be reproduced in color identical with target TG1～TG12 in any light source.But,, therefore, in fact can not obtain the quantity of ink that can reproduce φ is set with the identical spectral reflectivity R of target TG1～TG12 (λ) because printer 20 spendable inks (look assortment class) are restricted to CMYKlclm.In addition, even about not having influence on the wavelength domain of sensation look, also obtain the quantity of ink that can reproduce with target TG1～TG12 identical spectra reflectivity R (λ) φ is set, it is of no use also not have for the playback accuracy that realizes vision.
On the other hand, in the zone corresponding of the sample figure SC on being formed on printing paper, according to quantity of ink φ is set and prints based on above-mentioned 3D-LUT with frame FL1～FL12.Therefore, this zone will have the printing effect (performance) based on 3D-LUT.As mentioned above, in the present embodiment, the same image of region representation middle gray beyond frame FL1～F12, in this zone, 3D-LUT can make it satisfy the printing effect of target.That is, can realize reproducing contrast, the graininess of look, not dependence, colour gamut and all good generally printing of ink duty ratio (inkduty) of light source of reproducing colors.
4. spectrum printing model
Figure 16 has schematically shown the mode of printing of the printer 20 of present embodiment.In the figure, printer 20 comprises that each ink at CMYKlclm has a plurality of nozzle 21a, 21a ... print head 21, and make nozzle 21a, 21a based on printing control data CD ... the quantity of ink of each ink of the CMYKlclm that is sprayed reaches with above-mentioned quantity of ink φ (d is set
C, d
M, d
Y, d
K, d
Lc, d
Lm) control of the amount that is as the criterion.Each nozzle 21a, 21a ... the ink droplet that sprays forms small ink dot on printing paper, and is formed on the printing paper and quantity of ink is provided with φ (d by being integrated into of a large amount of ink dots
C, d
M, d
Y, d
K, d
Lc, d
Lm) the printing image of corresponding ink coverage rate.
The employed forecast model of RPM P3a2 (spectrum printer model) is to be used for the printer 20 spendable quantity of ink arbitrarily with present embodiment are provided with φ (d
C, d
M, d
Y, d
K, d
Lc, d
Lm) spectral reflectivity R (λ) when printing is as prediction spectral reflectivity R
sThe forecast model of (λ) predicting.In the spectrum printer model, prepare spectral reflectance data storehouse DB, this spectral reflectance data storehouse DB obtains by measuring about a plurality of representative point actual print colour codes in the quantity of ink space and with spectroreflectometer.Then, cut apart You Er-Nelson's spectrum knob Jie fort model (cellular yule-nielsen Spectral Neugebauer Model) by the unit and use this spectral reflectance data storehouse DB to predict, correct thus prediction is provided with φ (d with quantity of ink arbitrarily
C, d
M, d
Y, d
K, d
Lc, d
Lm) prediction spectral reflectivity R when printing
s(λ).
Figure 17 shows spectral reflectance data storehouse DB.As shown in figure 17, spectral reflectance data storehouse DB is the look-up table that records spectral reflectivity, wherein spectral reflectivity be by about the quantity of ink space (be in the present embodiment 6 the dimension, but for simplicity of illustration, only show the CM plane) in a plurality of lattice points on quantity of ink setting (d
C, d
M, d
Y, d
K, d
Lc, d
Lm) actual print and/or measure obtain.For example, produce the lattice point of 5 lattice cutting apart each quantity of ink axle.Here can produce 513 lattice points, need carry out the printing and/or the mensuration of the colour code of huge quantity, but, in fact because the ink number that can install simultaneously of printer 20 and ink duty ratio capable of simultaneous injection are limited, thus print and/or the quantity of the lattice point measured also restricted.
In addition, also can be only the lattice point of a part be printed and/or measures, and predict the spectral reflectivity R (λ) of other lattice points according to the spectral reflectivity R (λ) of the actual lattice point that prints and/or measure, reduce the number of the actual colour code that prints and/or measure thus.Spectral reflectance data storehouse DB need prepare according to printer 20 printable each printing paper.Strictly speaking, spectral reflectivity R (λ) is by the reflectivity decision of spectral-transmission favtor that is formed at the ink film (point) on the printing paper and printing paper, and this is the cause because of the very big influence of surface physical property (shape of point depends on this surface physical property) that is subjected to printing paper and reflectivity.Then, describe cut apart the prediction that You Er-Nelson's spectrum knob Jie fort model use spectral reflectance data storehouse DB carries out by the unit.
RPM P2a2 carries out the prediction of cutting apart You Er-Nelson's spectrum knob Jie fort model based on the unit that has used spectral reflectance data storehouse DB according to the request of ICM P2a1.When carrying out this prediction, obtain predicted condition from ICM P3a1, and set this predicted condition.Specifically, printing paper, quantity of ink are provided with φ etc. and are set at printing condition.For example, when glossy paper is predicted as printing paper, set the spectral reflectance data storehouse DB that generates by printing colour code on glossy paper.
After the setting of finishing spectral reflectance data storehouse DB, will φ (d be set from the quantity of ink of ICM P3a1 input
C, d
M, d
Y, d
K, d
Lc, d
Lm) be applied in the spectrum printing model.The unit is cut apart You Er-Nelson's spectrum knob Jie fort model and is based on the model of known spectrum knob Jie fort model and You Er-Nilsson model.In the following description, for the model of simplifying when using three kinds of inks of CMY describes, but will identical model extension comprise that the model of the setting of ink arbitrarily of the CMYKlclm of present embodiment is easily to use.In addition, cut apart You Er-Nelson's spectrum knob Jie fort model about the unit, please refer to Color Res Appl 25,4-19,2000 and RBalasubramanian, Optimization of the spectral Neugebauer model for printercharacterization, J.Electronic Imaging 8 (2), 156-166 (1999).
Figure 18 is the figure that spectrum knob Jie fort model is shown.In spectrum knob Jie fort model, with (the d of quantity of ink setting arbitrarily
c, d
m, d
y) the prediction spectral reflectivity Rs (λ) of printed article when printing provides by following formula (3).
[formula 3]
R
s(λ)＝a
wR
w(λ)+a
cR
c(λ)+a
mR
m(λ)+a
yR
y(λ)
+a
rR
r(λ)+a
gR
g(λ)+a
bR
b(λ)+a
kR
k(λ) …(3)
a
w＝(1-f
c)(1-f
m)(1-f
y)
a
c＝f
c(1-f
m)(1-f
y)
a
m＝(1-f
c)f
m(1-f
y)
a
y＝(1-f
c)(1-f
m)f
y
a
r＝(1-f
c)f
mf
y
a
g＝f
c(1-f
m)f
y
a
b＝f
cf
m(1-f
y)
a
k＝f
cf
mf
y
Here, a
iBe the area occupation ratio in i zone, R
i(λ) be the spectral reflectivity in i zone.The zone (k) that subscript i represents not have ink regions (w) respectively, only sprays the zone (c) of cyan, only sprays the zone (m) of magenta ink, only sprays the zone (y) of yellow ink, the zone (r) of spraying magenta ink and yellow ink, the zone (g) of spraying yellow ink and cyan, the zone (b) of spraying cyan and magenta ink, three kinds of inks of injection CMY.In addition, f
c, f
m, f
yThe ratio (being called ink coverage rate (Ink area coverage)) of the area that is covered by this ink when being a kind of in only spraying each ink of CMY.
Ink coverage rate f
c, f
m, f
yProvide by the agate thunder Davis model shown in Figure 18 (B).In agate thunder Davis model, for example, the ink coverage rate f of cyan
cBe cyan ink water yield d
cNonlinear function, for example can be by the one dimension look-up table with quantity of ink d
cBe scaled ink coverage rate f
cInk coverage rate f
c, f
m, f
yBe quantity of ink d
c, d
m, d
yThe reason of nonlinear function as follows: ink fully launches when spraying a spot of ink on unit are, but can be increased hardly by the area that ink covers because ink is overlapping when spraying a large amount of ink.The MY ink of other kinds too.
When using the You Er relevant with spectral reflectivity-Nilsson model, described formula (3) is rewritten into following formula (4a) or formula (4b).
[formula 4]
R
s(λ)
1/n＝a
wR
w(λ)
1/n+a
cR
c(λ)
1/n+a
mR
m(λ)
1/n+a
yR
y(λ)
1/n
+a
rR
r(λ)
1/n+a
gR
g(λ)
1/n+a
bR
b(λ)
1/n+a
kR
k(λ)
1/n …(4a)
R
s(λ)＝{a
wR
w(λ)
1/n+a
cR
c(λ)
1/n+a
mR
m(λ)
1/n+a
yR
y(λ)
1/n
+a
rR
r(λ)
1/n+a
gR
g(λ)
1/n+a
bR
b(λ)
1/n+a
kR
k(λ)
1/n}
n …(4a)
Here, n is the pre-determined factor more than 1, for example can set n=10 for.Formula (4a) and formula (4b) are the formulas of expression You Er-Nelson's spectrum knob Jie fort model (Yule-Nielsen SpectralNeugebauer Model).
To cut apart You Er-Nelson's spectrum knob Jie fort model (cellularyule-nielsen Spectral Neugebauer Model) be that quantity of ink space segmentation with above-mentioned You Er-Nelson's spectrum knob Jie fort model becomes the model of a plurality of unit in the unit of Cai Yonging in the present embodiment.
Figure 19 (A) shows the unit and cuts apart the example that the unit in You Er-Nelson's spectrum knob Jie fort model is cut apart.Here, for the purpose of simplifying the description, the quantity of ink d that comprises the CM ink has been described
c, d
mThe two-dimentional quantity of ink space of two axles in the unit cut apart.In addition, ink coverage rate f
c, f
mIn described agate thunder Davis model with quantity of ink d
c, d
mBetween have unique relation, therefore, also can think to represent ink coverage rate f
c, f
mAxle.Open circles is the grid point (being called " lattice point ") that the unit is cut apart, and two-dimentional quantity of ink (overlay capacity) space is divided into nine unit C1～C9.Quantity of ink setting (the d corresponding with each lattice point
c, d
m) as the quantity of ink setting corresponding of in the DB of spectral reflectance data storehouse, stipulating with lattice point.That is,, can access the spectral reflectivity R (λ) of each lattice point by with reference to above-mentioned spectral reflectance data storehouse DB.Therefore, the spectral reflectivity R (λ) of each lattice point
00, R (λ)
10, R (λ)
20R (λ)
33Can from the DB of spectral reflectance data storehouse, obtain.
In fact, in the present embodiment, the unit is cut apart also and is carried out in the sextuple quantity of ink space of CMYKlclm, and the coordinate of each lattice point also is provided with φ (d by the quantity of ink of 6 DOF
C, d
M, d
Y, d
K, d
Lc, d
Lm) represent.And, with the quantity of ink of each lattice point φ (d is set
C, d
M, d
Y, d
K, d
Lc, d
Lm) the spectral reflectivity R (λ) of corresponding lattice point obtains from spectral reflectance data storehouse DB (for example spectral reflectance data storehouse DB of glossy paper).
Figure 19 (B) shows the ink coverage rate f that uses in the unit parted pattern
cWith quantity of ink d
cBetween relation.Here, a kind of scope 0～d of quantity of ink of ink
CmaxAlso be divided into three intervals, the imaginary ink coverage rate f that uses has been obtained by from 0 to the 1 dull non-alignment curve that increases in each interval the unit parted pattern
cObtain the ink coverage rate f of other inks similarly
m, f
y
Figure 19 (C) shows with the setting of the quantity of ink arbitrarily (d in the central location C5 that is in Figure 19 (A)
c, d
m) prediction spectral reflectivity R when printing
sComputational methods (λ).With quantity of ink setting (d
c, d
m) prediction spectral reflectivity R when printing
s(λ) provide by following formula (5).
[formula 5]
R
s(λ)＝(∑a
iR
i(λ)
1/n)
n
＝(a
11R
11(λ)
1/n+a
12R
12(λ)
1/n+a
21R
21(λ)
1/n+a
22R
22(λ)
1/n)
n …(5)
a
11＝(1-f
c)(1-f
m)
a
12＝(1-f
c)f
m
a
21＝f
c(1-f
m)
a
22＝f
cf
m
Here, the ink coverage rate f in the formula (5)
c, f
mIt is the value that the curve by Figure 19 (B) provides.In addition, with the corresponding spectral reflectivity R (λ) of 4 lattice points that surrounds unit C5
11, R (λ)
12, R (λ)
21, R (λ)
22Can from reference spectra reflectivity data storehouse DB, obtain.Thus, can determine all values on make-up formula (5) the right,, can calculate with quantity of ink arbitrarily φ (d is set as its result of calculation
c, d
m) prediction spectrum inverse rate R when printing
s(λ).By in the visible light wave zone, changing wavelength X successively, can access the prediction spectral reflectivity R in the visible light wave zone
s(λ).When the quantity of ink space segmentation is a plurality of unit, compare with ameristic situation, can calculate prediction spectral reflectivity R more accurately
s(λ).When the request of RPMP3a2 response IC M P3a1 and as above-mentioned to prediction spectral reflectivity R
sWhen (λ) having carried out prediction, CCM P3a3 can use the spectral reflectivity R (λ) of this prediction then to carry out the prediction of prediction color-values.
5. variation
5-1. variation 1
In above-mentioned formula (2), with the weight coefficient w of each light source
1～w
5Be set at average value, still, also can be with this weight coefficient w
1～w
5Be set at uneven value.If with weight coefficient w
1～w
5Value set greatlyyer, just can improve the aberration Δ E in the pairing light source
D50, Δ E
D55, Δ E
D65, Δ E
A, Δ E
F11The increase of evaluation of estimate E (φ) ratio of making contributions.Therefore, if will make evaluation of estimate E (φ) minimization, just need be with weight coefficient w
1～w
5The value aberration Δ E that sets greatlyyer light source
D50, Δ E
D55, Δ E
D65, Δ E
A, Δ E
F11Get especially little value, φ is set, can realize having reduced and weight coefficient w by carrying out optimized quantity of ink based on this evaluation of estimate E (φ)
1～w
5Value be set greatlyyer the relevant aberration Δ E of light source
D50, Δ E
D55, Δ E
D65, Δ E
A, Δ E
F11Printing.
For example, weight coefficient w
1～w
5Can be set by the user.The user also can come specified weight coefficient w respectively according to the significance level of D50 light source, D55 light source, D65 light source, A light source, F11 light source
1～w
5For example, when the user wants to pay attention to outdoor color rendering precision, need only weight coefficient w with A light source, F11 light source
4, w
5Set less getting final product.Certainly, also can wait and set prior preset weight coefficient w indirectly by environment that select to observe printed article
1～w
5Combination.Thus, even do not have the user under the situation of light source relevant knowledge, also can set suitable weight coefficient w
1～w
5
5-2. variation 2
In the above-described embodiment, the object color component value by colour examining device 30 is specified the target TG under a plurality of light sources still, also can wait direct intended target color-values by keyboard 50a by the user.For example when having had the data of the color-values of carrying out colour examining at target TG when, can come the intended target color-values by importing these data.In addition, since the object color component value under a plurality of light sources can based target TG spectral reflectivity R (λ) calculate uniquely, therefore, replace the colour examining of the colour examining device 30 among the step S140, also can measure the spectral reflectivity R (λ) of target TG by spectroreflectometer.
The calculation procedure of the object color component value when Figure 20 has schematically shown the spectral reflectivity R (λ) that measures target TG.The spectral energy P of each light source of the 5 kinds of light sources shown in this figure D50 light source, D55 light source, D65 light source, the A light source of incandescent lamp system, the F11 light source of fluorescent lamp system of spectrum (the standard day)
D50(λ), P
D55(λ), P
D65(λ), P
A(λ), P
F11(λ).In the present embodiment, at each target TG1～TG12, measure spectral reflectivity R (λ) as target optical spectrum reflectivity R
t(λ), and with this target optical spectrum reflectivity R
t(λ) and the spectral energy P of each light source
D50(λ), P
D55(λ), P
D65(λ), P
A(λ), P
F11(λ) in the above-mentioned formula of substitution (1), calculate the object color component value thus.Can carry out the processing identical for the object color component value that obtains thus with above-mentioned execution mode.
5-3. variation 3
Figure 21 is schematically illustrated in CCM P3a3 in the variation calculates the prediction color-values based on prediction spectral reflectivity Rs (λ) situation.The target optical spectrum reflectivity R that in above-mentioned variation, obtains shown in this figure
t(λ), calculated this target optical spectrum reflectivity R by CCM P3a3 here
t(λ) and the coefficient correlation c between each isochrome function x (λ), y (λ), the z (λ)
x, c
y, c
zBecause getting the wavelength band of higher value, each isochrome function x (λ), y (λ), z (λ) have nothing in common with each other, therefore, and as the wavelength band of getting higher value and target optical spectrum reflectivity R
tCan think coefficient correlation c when (λ) similar
x, c
y, c
zBigger.Calculate the prediction color-values of this variation by following formula (6).
[formula 6]
X＝k∫P(λ)R
s(λ)
cxx(λ)dλ
Y＝k∫P(λ)R
s(λ)c
yy(λ)dλ …(6)
Z＝k∫P(λ)R
s(λ)c
zz(λ)dλ
In above-mentioned formula (6), when calculating the prediction color-values, multiply by coefficient correlation c
x, c
y, c
zBy so multiply by coefficient correlation c
x, c
y, c
z, can with coefficient correlation c
x, c
y, c
zCorresponding degree is emphasized each isochrome function x (λ), y (λ), z (λ).Therefore, can improve following isochrome function x (λ), y (λ), z (λ) to predicting the contribution of color-values, described isochrome function x (λ), y (λ), z (λ) and target optical spectrum reflectivity R
tCoefficient correlation c (λ)
x, c
y, c
zBigger, promptly it gets the wavelength band and the target optical spectrum reflectivity R of higher value
t(λ) similar.In other words, can calculate target optical spectrum reflectivity R
tThe prediction color-values that the contribution rate of the wavelength band that value (λ) is bigger is higher.By using this prediction color-values, can the special spectral reflectivity R that payes attention in the optimization of φ be set at quantity of ink
tThe wavelength band that value (λ) is bigger.
5-4. variation 4
Figure 22 has schematically shown the evaluation of estimate E (φ) of variation.Calculated in the CIELAB space object color component value with each light source in the figure with D50 → D55, D55 → D65, D65 → A, the color change vector V between the target light source that forms that is linked in sequence of A → F11
t1～V
t4, and calculated between the prediction light source color change vector V similarly at the prediction color-values
s1～V
s4.And, color change vector V between target light source
t1～V
t4 and the prediction light source between color change vector V
s1～V
sChange evaluation number S (φ) between the light source that each centering of 4 has been calculated the similitude indexing of its size, direction.And, as shown in the formula (7) definition evaluation of estimate E (φ).
[formula 7]
E(
)＝w1ΔE
D50+w
2ΔE
D55+w
3ΔE
D65+w
4ΔE
A+w
5ΔE
F11+w
6S(
)…(7)
According to the evaluation of estimate E (φ) of above-mentioned formula (7), can consider also that the quantity of ink of the approximation of the color change between light source is provided with the optimization of φ.
5-5. variation 5
For not selected frame The corresponding area in the above-described embodiment, can with frame F beyond regional identical color print.Certainly, for the corresponding zone of not selected frame F, do not need requirement spectrum reproducibility, therefore, also can with frame F beyond the regional color conversion of using 3D-LUT the samely.In addition, also can be outside the zone corresponding with the frame F of target TG appointment printed patterns, literal, mark etc.For example, can near the frame F of target TG appointment, record be used to represent that target TG is the literal of which type of target.In addition, the light source that is used for estimating is not limited to employed 5 kinds of above-mentioned execution mode, also can use the light source of other kinds.Certainly, the number of the light source that is used to estimate also is not limited to 5, for example both can set 3 kinds and seek to improve and will observe the reproducibility that light source is realized the target TG after the further reduction, also can set 8 kinds of reproducibilitys of seeking the target TG under the multiple light courcess more.
5-6. variation 6
Figure 23～Figure 24 shows the software configuration of the print system of variation of the present invention.As shown in figure 23, the component part suitable with the LUG P3a of above-mentioned execution mode also can form the internal module of PDV P3bb.In addition, as shown in figure 24, the component part suitable with the LUG P3a of above-mentioned execution mode also can be carried out in other computers 110.At this moment, computer 10 links to each other by predetermined communication interface CIF with computer 110, and the 1D-LUT that generates in the LUG of computer 110 P3a is sent to computer 10 via communication interface CIF.Also can there be network between the communication interface CIF.At this moment, computer 10 can carry out color conversion with reference to the 1D-LUT that obtains from the computer on the internet 110.Certainly, when being installed in the printer 20, the hardware of the equal processing of execution and software configuration P1～P5 also can realize the present invention.
5-7. variation 7
Figure 25 A, Figure 25 B show the UI picture (demonstration among the step S100) of this variation.In the above-described embodiment, the object color component value under a plurality of light sources of practical measurement, and generate the concordance list that this object color component value and index are mapped, still, also can be ready to register the concordance list of many index and object color component value in advance.In this variation, suppose to prepare in advance index that each coating of promising coating producer manufacturing provides with the coating surface of each coating is measured the concordance list of corresponding relation of object color component value.In this concordance list, also registered the demonstration rgb value identical with above-mentioned execution mode.Preparing in advance under the situation of concordance list, in step S100, be used for selecting to be rendered to the processing of the coating (index) of sample figure SC by APL P2.
At first, shown in Figure 25 A, the thumbnail of a plurality of sample image data and user image data is had a guide look of demonstration.The sample image data are the view data that are stored in advance among the HDD14, and user image data is the view data that obtains from image input devices such as digital cameras.In addition, also the view data of downloading from network can be used as user image data.Can click each thumbnail by mouse 50b, display box on the in the end clicked thumbnail.In the UI of Figure 25 A picture, be provided with definite key, determine the user image data corresponding or the selection of sample image data with the thumbnail that demonstrates frame by clicking definite key.
After having determined selection, move to the UI picture of Figure 25 B.Amplification thumbnail in determined user image data of this UI screen displayed or sample image data.In the UI of Figure 25 B picture, be provided with manual selector button and automatic selector button.When having clicked manual selector button, show mouse pointer amplifying on the thumbnail, and by towing and the upper left corner of the drop-down rectangle appointed area of accepting user expectation and the appointment in the lower right corner.So each pixel that APL P2 is used for belonging to specified rectangular area to DDV P5 inquiry is shown to the rgb value on the display 40.DDV P5 is used to show the rgb value of each pixel of amplifying thumbnail to display 40 output, thereby can determine to belong to the rgb value of each pixel of appointed area.Behind the rgb value of obtaining each pixel that belongs to the appointed area, APL P2 gets rgb value average of each pixel, and with this mean value as specifying rgb value.On the other hand, after having clicked automatic selector button, APL P2 obtains the rgb value of whole pixels of amplifying thumbnail from DDV P5, and wherein the most representative rgb value as specifying rgb value.For example, also can generate the histogram of the rgb value of whole pixels of amplifying thumbnail, and with the rgb value of frequency maximum as specifying rgb value.As above-mentioned obtain specifying rgb value after, retrieval is near the demonstration rgb value of this appointment rgb value in concordance list.Here retrieval specifies rgb value and each to show the index of using the Euclidean distance minimum of rgb value in rgb space.To and specify the demonstration of the value Euclidean distance minimum between RGB to be designated as the most approximate rgb value with rgb value.Then, by known change type each demonstration is converted to the HSV value with rgb value (also comprising the most approximate rgb value).
Figure 26 shows to mark in the HSV space each is shown the situation that gets the HSV value with the rgb value conversion.In the figure, some Q0 shows the HSV value that the most approximate rgb value conversion is got.In the HSV space, determine with respect to will the most approximate rgb value conversion and the hue angle (H value) ± 5 of HSV value (Q0) spend and be fan-shaped space with interior cross section.That is, determine that hue angle is similar to the space of approximate rgb value.Then, generate 2 asessory shaft SA that intersect at lightness axis (V axle) and chroma axle (S axle) with 45 degree, and definition is by first to fourth regional AR1～AR4 of this asessory shaft division.First area AR1 have hue angle H near the most approximate rgb value and lightness V greater than the characteristic of approximate rgb value.In addition, second area AR2 has approximate angle H and is slightly smaller than the characteristic of approximate rgb value near the most approximate rgb value and chroma S.The 3rd regional AR3 have hue angle H near the most approximate rgb value and with lightness V less than the characteristic of approximate rgb value.The 4th regional AR4 have hue angle H near the most approximate rgb value and chroma S greater than the characteristic of approximate rgb value.
In concordance list retrieval with belong to first area AR1 and have with the corresponding demonstration of HSV value of the most close lightness V of lightness V of some Q0 with rgb value (first is similar to rgb value, is designated as a Q1 in the HSV space).Similarly, in concordance list retrieval with belong to the 3rd regional AR3 and have with the corresponding demonstration of HSV value of the most close lightness V of lightness V of some Q0 with rgb value (the 3rd is similar to rgb value, is designated as a Q3 in the HSV space).The first approximate rgb value can be described as hue angle H the most approximate the most approaching rgb value and lightness V and is a bit larger tham the rgb value of approximate rgb value.On the contrary, the 3rd approximate rgb value can be described as with the most approximate rgb value and compares the rgb value that hue angle H is close and lightness V is slightly little.Then, in concordance list retrieval with belong to second area AR2 and have with the corresponding demonstration of HSV value of the most close chroma S of chroma S of some Q0 with rgb value (second is similar to rgb value, is designated as a Q2 in the HSV space).Similarly, in concordance list retrieval with belong to the 4th regional AR4 and have with the corresponding demonstration of HSV value of the most close chroma S of chroma S of some Q0 with rgb value (nearby place is rgb value seemingly, is designated as a Q4 in the HSV space).The second approximate rgb value can be described as hue angle H the most approximate the most approaching rgb value and chroma S and is slightly smaller than the rgb value of approximate rgb value.On the contrary, the nearby place can be to compare the approximate and big slightly rgb value of chroma S of hue angle H with the most approximate rgb value like rgb value.
In addition, as shown in figure 26, in the HSV space, determine annular space, the lightness V of this annular space and chroma S with respect to will the most approximate rgb value conversion and the lightness V of HSV value (Q0) and the difference of chroma S in ± 5.That is, determine that lightness V and chroma S are similar to the space of approximate rgb value.Then, in this annular space, with hue angle H greater than will be the most approximate the rgb value conversion and the zone of HSV value be made as the 5th regional AR5, the zone that hue angle H is little is made as the 6th regional AR6.And, in concordance list retrieval with belong to the 5th regional AR5 and have with the corresponding demonstration of HSV value of the most close hue angle H of some Q0 with rgb value (the 5th is similar to rgb value, is designated as a Q5 in the HSV space).Similarly, in concordance list retrieval with belong to the 6th regional AR6 and have with the corresponding demonstration of HSV value of the most close hue angle H of some Q0 with rgb value (the 6th is similar to rgb value, is designated as a Q6 in the HSV space).The 5th approximate rgb value can be described as lightness V and chroma S and is similar to the most approximate rgb value and hue angle H and is a bit larger tham the rgb value of approximate rgb value.On the contrary, the 6th approximate rgb value can be described as lightness V and chroma S and is similar to the most approximate rgb value and hue angle H and is slightly smaller than the rgb value of approximate rgb value.As above-mentioned determine the approximate rgb value of the most approximate rgb value and first～6th after, show ensuing UI picture.
Figure 27 shows the UI picture that next shows.In this UI picture, show the HSV space partly, and show the HSV axle respectively.Shown the demonstration mark PT0 that pays close attention to that is coated with full rectangle with the most approximate rgb value at these intersection point place.On the other hand, the side that the lightness V on the V axle is big has shown that being coated with first of full rectangle with the first approximate rgb value shows mark PT1, and the side that the lightness on the V axle is little has shown that being coated with the 3rd of full rectangle with the 3rd approximate rgb value shows mark PT3.In addition, the side that the lightness S on the S axle is big has shown that being coated with the 4th of full rectangle with the nearby place like rgb value shows mark PT4, and the side that the lightness S on the S axle is little has shown that being coated with second of full rectangle with the second approximate rgb value shows mark PT2.In addition, the side that the hue angle H on the H axle is big has shown that being coated with the 5th of full rectangle with the 5th approximate rgb value shows mark PT5, and the side that the hue angle on the H axle is little has shown that being coated with the 6th of full rectangle with the 6th approximate rgb value shows mark PT6.
Pay close attention to show mark PT0 by the demonstration of in concordance list, being registered with in the rgb value with the rgb value of user's appointment nearest like rgb value show.In the index (coating) that promptly shows in concordance list to be registered with the rgb value of user's appointment recently like the color of coating.Relative therewith, first～the 6th shows in the index (coating) that mark PT1～PT6 can be described as in concordance list to be registered the color of appointment rgb value (the most approximate rgb value) with user's appointment close and form and aspect H, lightness V, chroma S and the discrepant slightly coating of the most approximate RGB.Thus, can observe color with the color of the akin coating of appointment rgb value of user's appointment and the coating close with it.
In the UI of Figure 27 picture, be provided with and adjust button and sample figure print button.When clicking the adjustment button, APL P2 monitors the operation to mouse 50b.Though omitted diagram, mouse 50b also has roller except that the some keystroke.During after click adjusting button, beginning to be operated once more to a keystroke, the moving direction of APL P2 supervision mouse 50b and the rotation of roller.And, in response to the rotation of moving direction and the roller of mouse 50b, the UI picture of following renewal Figure 27.
When mouse 50b makes progress (inboard) when having moved scheduled volume, replace the most approximate rgb value with the first current approximate rgb value.Replacing with the current first the most approximate rgb value on the basis of the most approximate rgb value, calculate first～the 6th new approximate rgb value by above-mentioned step.And, upgrade the UI picture of Figure 27 according to the approximate rgb value of new the most approximate rgb value and first～6th, so that show that demonstration mark PT0 and first～6th that pay close attention to shows mark PT1～PT6.Thus, pay close attention to and show that mark PT0 and first～6th shows that mark PT1～PT6 is to by the color offset shown in the coating of the high side of lightness.On the other hand, when mouse 50b downwards (front of oneself) when having moved scheduled volume, upgrade the UI picture of Figure 27 replacing with the current the 3rd approximate rgb value on the basis of the most approximate rgb value, show that mark PT0 and first～6th demonstration marks PT1～PT6 so that show that new institute pays close attention to.Thus, pay close attention to and show that mark PT0 and first～6th shows that mark PT1～PT6 is to by the color offset shown in the coating of the low side of lightness.
When mouse 50b has moved right scheduled volume, upgrade the UI picture of Figure 27 replacing with current the 4th approximation RGB on the basis of the most approximate rgb value, show that mark PT0 and first～6th demonstration marks PT1～PT6 so that show that new institute pays close attention to.Similarly, when mouse 50b has been moved to the left scheduled volume, on the basis of replacing optimal approximate value RGB with the second current approximate RGB, upgrade the UI picture of Figure 27, show mark PT1～PT6 so that show new demonstration mark PT0 and first～6th that pay close attention to.When the roller of mouse 50b inwards sideway swivel during scheduled volume, upgrade the UI picture of Figure 27 replacing with the 5th current approximate rgb value on the basis of the most approximate rgb value show that mark PT0 and first～6th demonstration marks PT1～PT6 so that show that new institute pays close attention to.When the roller of mouse 50b when the front direction of oneself has been rotated scheduled volume, upgrade the UI picture of Figure 27 replacing with the current the 6th approximate rgb value on the basis of the most approximate rgb value, show that mark PT0 and first～6th demonstration marks PT1～PT6 so that show that new institute pays close attention to.
Thus, can pay close attention to the color that shows mark PT0 to any change of first～the 6th demonstration mark PT1～PT6.That is, can make demonstration that the color that shows mark PT0 paid close attention to registered in concordance list with in the middle of the rgb value to the high/low side of lightness high/low a side, chroma and hue angle greatly/a little lateral deviation moves.That is, can change the color that shows mark PT0 of paying close attention to along H axle, S axle and V axle, can adjust the color that shows mark PT0 of paying close attention to sensuously by the operation of mouse 50b.Demonstration mark PT and first～6th that pay close attention to shows mark PT1～PT6 owing to show with rgb value based on the demonstration that retrieves from concordance list, so can show the color that any coating presents.When having clicked the some keystroke of mouse 50b, end is handled based on the renewal of the UI picture of Figure 27 of the operation of mouse 50b.Thus, can be in the renewal that the position that shows mark PT10 stops the UI picture of Figure 27 of paying close attention to that has shown that the user agrees.
When in the UI of Figure 27 picture, having clicked sample figure print button, transfer among the step S170 of Fig. 3, generate printed data.Here, the basic printed data that generates the UI picture that is used to print Figure 27.Be that demonstration mark PT0 and first～6th demonstration mark PT1～PT6 is paid close attention in the printshop.Here, in the pixel of printed data PD,, store rgb value about showing the pixel beyond the corresponding zone of mark PT1～PT6 with pay close attention to demonstration mark PT0 and first～6th.On the other hand, about showing the corresponding pixel of mark PT1～PT6 with pay close attention to demonstration mark PT0 and first～6th, storage shows that with being used to show demonstration mark PT0 and first～6th that pay close attention to the demonstration of mark PT1～PT6 is with the corresponding index of rgb value, with the replacement rgb value in concordance list.So, show mark PT1～PT6, the printing that execution is used to reproduce the object color component value of the coating corresponding under a plurality of light sources about pay close attention to demonstration mark PT0 and first～6th with each index.
Can the printshop in the sample figure SC of as above printing pay close attention to and show that mark PT0, this institute pay close attention to and show that mark PT0 is used for reproducing and present the object color component value of coating under a plurality of light sources of having carried out close color such as the color of regional appointment etc. with the user at the amplification thumbnail.And can print first～the 6th and show mark PT1～PT6, this first～the 6th shows that mark PT1～PT6 is used to reproduce present to pay close attention to this institute and shows the object color component value of coating under a plurality of light sources of marking the close color of PT0.Even exist under the situation of some differences, also can from first～the 6th demonstration mark PT1～PT6 that presents the color close, select the coating of expecting with pay close attention to demonstration mark PT0 in the reproduction result of pay close attention to demonstration mark PT0 and the effect of user expectation.
Claims (8)
1. print control, carry out when printing when make a plurality of look materials be attached to recording medium by printing equipment, the look material amount of described printing equipment appointment as the combination of the use amount of described look material is provided with, and described print control is characterised in that, comprising:
The object color component value obtains the unit, and described object color component value obtains the unit and obtains by the target object color component value that shown each color-values constitutes under a plurality of light sources; And
Printing control unit, described printing control unit is by obtaining the described look material amount setting corresponding with described object color component value with reference to the look-up table of having stipulated the corresponding relation between described object color component value and the setting of described look material amount, and this look material amount setting is assigned to described printing equipment makes it carry out printing
Wherein, in described look-up table, stipulated described look material amount setting and and this look material amount setting is assigned to corresponding relation between the high described object color component value of each color-values approximation under each light source that is reproduced in when described printing equipment makes it carry out printing on the described recording medium.
2. print control according to claim 1 is characterized in that,
Estimate described approximation by evaluation of estimate, described evaluation of estimate is based on the value of the aberration between each light source each color-values down of constituting described object color component value and each color-values under the setting of described look material amount being assigned to each light source that is reproduced in when described printing equipment prints its execution on the described recording medium.
3. print control according to claim 2 is characterized in that,
By described evaluation of estimate is calculated in the described aberration linear combination under each light source.
4. print control according to claim 1 is characterized in that,
At each light source, the weight when adjustment is calculated described evaluation of estimate with the described aberration linear combination under each light source.
5. according to each described print control in the claim 1 to 4, it is characterized in that,
Each color-values that the setting of described look material amount is assigned under each light source that is reproduced in when described printing equipment makes it carry out printing on the described recording medium is predicted by following, that is: prediction is assigned to the spectral reflectivity that is reproduced in when described printing equipment makes it carry out printing on the described recording medium with the setting of described look material amount, and the color-values when calculating each light source of object illumination to this spectral reflectivity.
6. print control according to claim 5 is characterized in that,
Comprise that also the target optical spectrum reflectivity obtains the unit, this target optical spectrum reflectivity is obtained the spectral reflectivity that described target is obtained in the unit, as the target optical spectrum reflectivity,
During color-values when each light source of object illumination of calculating to the described spectral reflectivity of prediction, make and the contribution of the approximate isochrome function of described target optical spectrum reflectivity isochrome function greater than other.
7. print system, comprise: make a plurality of look materials be attached to printing equipment and print control that recording medium is carried out printing, described print control is specified as the look material amount setting of the combination of the use amount of described look material to described printing equipment and is made it carry out the printing that is provided with based on this look material amount, described print system is characterised in that, comprising:
The object color component value obtains the unit, and described object color component value obtains the unit and obtains by the target object color component value that shown each color-values constitutes under a plurality of light sources; And
Printing control unit, described printing control unit is by obtaining the described look material amount setting corresponding with described object color component value with reference to the look-up table of having stipulated the corresponding relation between described object color component value and the setting of described look material amount, and this look material amount setting is assigned to described printing equipment makes it carry out printing
Wherein, in described look-up table, stipulated described look material amount setting and and this look material amount setting is assigned to corresponding relation between the high described object color component value of each color-values approximation under each light source that is reproduced in when described printing equipment makes it carry out printing on the described recording medium.
8. computer-readable print control program, be used to make computer to carry out and described printing equipment bulletin colour material amount be provided with and carry out function based on the printing of this look material amount setting when carrying out printing when make a plurality of look materials be attached to recording medium by printing equipment, the setting of wherein said look material amount is the combination of the use amount of described look material, described print control program is characterised in that
Make computer carry out following function:
The object color component value obtains function, obtains by the target object color component value that shown each color-values constitutes under a plurality of light sources; And
The printing controlled function, by obtaining the described look material amount setting corresponding with described object color component value with reference to the look-up table of having stipulated the corresponding relation between described object color component value and the setting of described look material amount, and this look material amount setting is assigned to described printing equipment makes it carry out printing
Wherein, in described look-up table, stipulated described look material amount setting and and this look material amount setting is assigned to corresponding relation between the high described object color component value of each color-values approximation under each light source that is reproduced in when described printing equipment makes it carry out printing on the described recording medium.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2007330784 | 2007-12-21 | ||
| JP2007330784 | 2007-12-21 | ||
| JP2008306356 | 2008-12-01 |
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| CN101465945A true CN101465945A (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101878817A Pending CN101465945A (en) | 2007-12-21 | 2008-12-22 | Print control apparatus, print system and print control program |
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| JP (1) | JP2009171556A (en) |
| CN (1) | CN101465945A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102034037A (en) * | 2009-09-24 | 2011-04-27 | 精工爱普生株式会社 | Authentication system, printing terminal and authenticating terminal |
| CN103234636A (en) * | 2013-04-18 | 2013-08-07 | 陕西科技大学 | Color difference evaluation method of transfer printing product based on polynomial fitting |
| CN103538385A (en) * | 2012-11-14 | 2014-01-29 | 王荣强 | Method for predicting excessive ink-limited multi-ink sample spectrum based on cellular unit type Neugebauer spectrum model |
| CN103540187A (en) * | 2013-03-29 | 2014-01-29 | 王荣强 | Method for improving formula of printer ink |
| CN107000457A (en) * | 2014-11-28 | 2017-08-01 | 富士胶片株式会社 | Ink image thing generation method |
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| JP5693192B2 (en) * | 2010-12-13 | 2015-04-01 | キヤノン株式会社 | Color processing apparatus, color processing method, program, and storage medium |
| JP5909887B2 (en) | 2011-06-14 | 2016-04-27 | セイコーエプソン株式会社 | Image processing apparatus, printing apparatus, image processing method, and lookup table generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3968565B2 (en) * | 2002-03-20 | 2007-08-29 | セイコーエプソン株式会社 | PRINT CONTROL DEVICE, PRINT CONTROL METHOD, PRINT CONTROL PROGRAM, MEDIUM CONTAINING PRINT CONTROL PROGRAM, COLOR CONVERSION DEVICE, COLOR CONVERSION METHOD, COLOR CONVERSION TABLE CREATION METHOD, AND COLOR CONVERSION TABLE |
| JP2006159709A (en) * | 2004-12-08 | 2006-06-22 | Ricoh Co Ltd | Image outputting device/method and recording medium |
| JP4590424B2 (en) * | 2006-05-12 | 2010-12-01 | キヤノン株式会社 | Color processing apparatus and method |
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2008
- 2008-12-01 JP JP2008306356A patent/JP2009171556A/en not_active Withdrawn
- 2008-12-22 CN CNA2008101878817A patent/CN101465945A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102034037A (en) * | 2009-09-24 | 2011-04-27 | 精工爱普生株式会社 | Authentication system, printing terminal and authenticating terminal |
| CN103538385A (en) * | 2012-11-14 | 2014-01-29 | 王荣强 | Method for predicting excessive ink-limited multi-ink sample spectrum based on cellular unit type Neugebauer spectrum model |
| CN103538385B (en) * | 2012-11-14 | 2015-12-23 | 慈溪市宝日电器有限公司 | Based on the method for the how black sample spectrum of the super black amount restriction of cell element formula Neugebauer spectral model prediction |
| CN103540187A (en) * | 2013-03-29 | 2014-01-29 | 王荣强 | Method for improving formula of printer ink |
| CN103234636A (en) * | 2013-04-18 | 2013-08-07 | 陕西科技大学 | Color difference evaluation method of transfer printing product based on polynomial fitting |
| CN103234636B (en) * | 2013-04-18 | 2014-12-17 | 陕西科技大学 | Color difference evaluation method of transfer printing product based on polynomial fitting |
| CN107000457A (en) * | 2014-11-28 | 2017-08-01 | 富士胶片株式会社 | Ink image thing generation method |
| CN107000457B (en) * | 2014-11-28 | 2018-05-25 | 富士胶片株式会社 | Ink image object generation method |
| CN110027338A (en) * | 2017-12-08 | 2019-07-19 | 株式会社理光 | Printed article, the manufacturing method of printed article, image forming apparatus and recording medium |
| CN110027338B (en) * | 2017-12-08 | 2021-04-09 | 株式会社理光 | Printed matter, method for manufacturing printed matter, image forming apparatus, and storage medium |
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| JP2009171556A (en) | 2009-07-30 |
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