CN108958674A - A kind of ink-jet printer chases after color method, system, storage medium and chases after color equipment - Google Patents
A kind of ink-jet printer chases after color method, system, storage medium and chases after color equipment Download PDFInfo
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- CN108958674A CN108958674A CN201810783535.9A CN201810783535A CN108958674A CN 108958674 A CN108958674 A CN 108958674A CN 201810783535 A CN201810783535 A CN 201810783535A CN 108958674 A CN108958674 A CN 108958674A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1204—Improving or facilitating administration, e.g. print management resulting in reduced user or operator actions, e.g. presetting, automatic actions, using hardware token storing data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1208—Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1242—Image or content composition onto a page
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Abstract
Color method, system, storage medium are chased after the present invention relates to a kind of ink-jet printer and chases after color equipment, and method includes the spectroscopic data for obtaining target printer respectively and chasing after color printer printing reset condition, and is pre-processed to spectroscopic data；Generated according to pretreated spectroscopic data chase after color printer chase after color look-up table；Color printer printing Target Photo is chased after according to the control of color look-up table is chased after.Ink-jet printer of the invention chases after color method, by obtaining target printer and chasing after the spectroscopic data of color printer reset condition and pre-processed, then established according to the spectroscopic data of pretreated reset condition chase after color printer chase after color look-up table, and Target Photo is printed according to the color look-up table that chases after for chasing after color printer, it realizes the automatical and efficient of ink-jet printer and chases after color, without relying on senior toning personnel, it is easy to operate, cost is saved, and chases after that color color difference is small, it is good to the reduction effect of grayscale image.
Description
Technical field
The present invention relates to printing technique field more particularly to a kind of ink-jet printer chase after color method, system, storage medium and
Chase after color equipment.
Background technique
Ink-jet printer outdoors lead by advertisement, label printing, textile printing, ceramic printing, printed electronic, home decoration etc.
Domain has a wide range of applications.When being industrially mass produced, usually require that plurality of printers can print solid colour
Specimen page, and require the color that prints in use for some time and predetermined printing specimen page solid colour.Generally beat
The state of print machine is simultaneously unstable, it will usually be influenced by factors such as environment temperature, humidity, spray head agings, and replace ink
Also the color for printing specimen page can be made different degrees of variation occur with paper.How to guarantee that plurality of printers can be in different time sections
Consistent color is inside printed, is the critical issue for needing urgently to solve in current industrial production.It is common to chase after color for realization at present
There are following several methods:
(1) color correction personnel according to print result make repeated attempts it is different ink amount proportion, need through test toning personnel spend
Plenty of time and energy remove the ink amount curve of adjustment printer；
(2) pixel value in picture being adjusted according to practical print result, this method is only suitable for the small situation of output, if
Need to print a large amount of pictures, staff needs to handle for each each picture of printer, and workload is huge；
(3) link properties file is generated using the characteristic file of printer, although operating method is simple, there are certain journeys
The colour cast problem of degree, it is undesirable to the reduction effect of gray scale, it is difficult to promote and apply in actual production.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide a kind of ink-jet printers to chase after
Color method, system, storage medium and color equipment is chased after, according to the spectroscopic data of the Target Photo of measurement printer to every printer
Foundation chases after color look-up table, realizes that ink-jet printer is automatical and efficient to chase after color.
The technical scheme to solve the above technical problems is that a kind of ink-jet printer chases after color method,
Step 1: obtaining target printer respectively and chase after the reset condition spectroscopic data of color printer printing, and to the light
Modal data is pre-processed；
Step 2: generated according to the pretreated spectroscopic data chase after color printer chase after color look-up table；
Step 3: according to it is described chase after color look-up table control chase after color printer printing Target Photo.
The beneficial effects of the present invention are: by obtaining target printer and chasing after the spectroscopic data of color printer reset condition simultaneously
Pre-processed, then established according to the spectroscopic data of pretreated reset condition chase after color printer chase after color look-up table, and
According to chase after color printer chase after color look-up table printing Target Photo, realize the automatical and efficient of ink-jet printer and chase after color, without according to
Rely senior toning personnel, it is easy to operate, cost is saved, and the color difference for chasing after color is small, it is good to the reduction effect of grayscale image.
Based on the above technical solution, the present invention can also be improved as follows:
Further, the step 1 specifically includes:
Step 11: target printer being measured using luminosity protractor respectively and chases after the original of the Target Photo of color printer printing
The spectroscopic data of beginning color lump figure；
Step 12: the spectroscopic data being converted into the corresponding Lab value of Lab space, generates the corresponding Lab of target printer
Spatial data Lab space data corresponding with color printer is chased after；
Step 13: respectively by the corresponding Lab space data of target printer Lab space data corresponding with color printer is chased after
It is smoothed.
The beneficial effect of above-mentioned further scheme is: can accurately measure target printer by the luminosity protractor
With the spectroscopic data for the original color lump figure for chasing after the printing of color printer, then the spectroscopic data is transformed into Lab space, generates target
The corresponding Lab space data of printer Lab space data corresponding with color printer is chased after, then after being smoothed, can obtain
To corresponding more accurate Lab space data, corresponding first color lookup is generated according to Lab space data convenient for subsequent
Table.
Further, the step 2 specifically includes:
Step 21: corresponding with color printer is chased after according to the corresponding Lab space data of target printer after smoothing processing
Lab space data generate the first color lookup table of target printer respectively and chase after the first color lookup table of color printer；
Step 22: color gamut conversion processing being carried out to the first color lookup table of target printer, generates target printer
Second color lookup table；
Step 23: the constant processing of gray scale being carried out to second color lookup table of target printer, obtains target print
The third color lookup table of machine；
Step 24: color is chased after according to the third color lookup table of target printer and the first look-up table generation for chasing after color printer
Printer chases after color look-up table.
The beneficial effect of above-mentioned further scheme is: passing through the corresponding Lab space number of target printer after smoothing processing
It is looked into according to the first color that Lab space data corresponding with color printer is chased after can correspond to obtain target printer and chase after color printer
Table is looked for, it can be by spectroscopic data from a color space conversion to another color space, convenient for passing through different color spaces
Conversion chases after color to realize, restores the color of Target Photo.
Further, the specific implementation of the step 21 are as follows:
Lab space data corresponding with color printer is chased after to the corresponding Lab space data of pretreated target printer
Interpolation processing is carried out respectively, obtains the first color lookup table of the target printer and chases after the first color lookup of color printer
Table；
Wherein, the first color lookup table of the target printer includes to the corresponding Lab space data of target printer
The forward lookup table that positive interpolation processing and reverse interpolation are handled is carried out respectivelyAnd reverse lookup tablesIt is described
The first color lookup table for chasing after color printer includes being carried out at positive interpolation respectively to chasing after the corresponding Lab space data of color printer
The forward lookup table that reason and reverse interpolation are handledAnd reverse lookup tables
The beneficial effect of above-mentioned further scheme is: by the corresponding Lab space data of target printer and chasing after color and beating
The corresponding Lab space data of print machine carry out interpolation processing, the first color lookup table of the available target printer respectively
With the first color lookup table for chasing after color printer；To realize the Lab space value of spectroscopic data and target printer or chase after color
Mutual mapping between the black magnitude of printer, is easy to implement different color space conversions.
Further, the step 22 specifically includes:
Step 221: to the reverse lookup tables of target printerIt is sampled, and obtains the Target Photo in Lab
The black magnitude of the corresponding target printer output of the Lab value in space；
Step 222: using the black magnitude of target printer output as input to the forward lookup table of the target printerInterpolation is carried out, the Lab value of target printer output is obtained；
Step 223: being exported according to each pixel of the Target Photo in the Lab value and target printer of Lab space
Corresponding Lab value generates the second color lookup table Lut of target printer1。
The beneficial effect of above-mentioned further scheme is: by the reverse lookup tables to the target printerIt is adopted
Sample processing, and using the result of sampling as input to the forward lookup table of the target printerInterpolation is carried out, according to institute
The each pixel for stating Target Photo generates target printer in the correspondence Lab value that the Lab value and target printer of Lab space export
The second color lookup table Lut1, convert, realize from Target Photo colour gamut to target printer color by color twice in this way
The conversion in domain.
Further, the specific implementation of the step 23 are as follows:
Step 231: according to the second color lookup table Lut1Calculate its saturation degree color difference for inputting Lab value and gray color
ΔE′ab；
Step 232: as the second color lookup table Lut1Input Lab value and gray color saturation degree color difference Δ E 'ab
When meeting setting condition, according to the following formula to the second color lookup table Lut1Output Lab value carry out the constant place of gray scale
Reason, obtains the third color lookup table Lut of target printer2；
a2=a1
b2=b1
The setting condition are as follows:
ΔE′ab≤α
Wherein, in Lab space, l indicates brightness, and a and b indicate coloration；The second color lookup table Lut1Input Lab
Value and output Lab value are respectively (l1,a1,b1) and (l2,a2,b2), lmaxAnd lminRespectively indicate the second color lookup table Lut1's
Input the maximum value and minimum value of brightness in Lab value, l 'maxWith l 'minRespectively indicate the second color lookup table Lut1Output Lab
The maximum value and minimum value of brightness in value, α indicate the second color lookup table Lut1Input Lab value and gray color saturation
Spend color difference threshold.
The beneficial effect of above-mentioned further scheme is: by calculating the second color lookup table Lut1Input Lab value and gray scale
The saturation degree color difference Δ E ' of colorab, and when meeting preset condition, to the second color lookup table Lut1Output Lab value into
The constant processing of row gray scale obtains the third color lookup table Lut of target printer2, the accurate gray scale rendition for realizing Target Photo,
Realize that the efficient of Target Photo chases after color convenient for subsequent.
Further, the specific implementation of the step 24 are as follows:
Step 241: the third color being inquired according to the Lab value of the corresponding spectroscopic data of target printer and is looked into
Look for table Lut2, obtain the corresponding output Lab value of target printer；
Step 242: the reverse lookup tables of color printer are chased after according to the inquiry of the output Lab value of target printer
The corresponding black magnitude for chasing after color printer output is obtained, the Lab value including each pixel in the Target Photo is generated and chases after color and beat
The corresponding black magnitude of print machine output chases after color look-up table.
The beneficial effect of above-mentioned further scheme is: passing through the Lab of the corresponding spectroscopic data of target printer
Value inquires the third color lookup table Lut2, the corresponding output Lab value of target printer can be accurately obtained, in this way, root
The reverse lookup tables of color printer are chased after described in output Lab value inquiry according to target printerIt can obtain and chase after color printer
The corresponding black magnitude of output, chases after color look-up table to generate, and chases after color will pass through the Lab value lookup of each pixel in Target Photo
The corresponding black magnitude of printer output, completion chase after color printing.
Further, the step 3 specifically includes:
Color look-up table is chased after according to the inquiry of the Lab value of each pixel in the Target Photo, obtains the target figure
The black magnitude of correspondence for chasing after color printer output of each pixel in piece, and chase after color printer described in control and complete the Target Photo
Printing.
The beneficial effect of above-mentioned further scheme is: can accurately inquire the target figure by the color look-up table that chases after
The corresponding black magnitude for chasing after color printer output of the Lab value of each pixel in piece, chases after color printer according to the ink of output in this way
Magnitude chases after color printing to realize, realizes and efficiently chases after color.
Further, the ink-jet printer chases after color method, after step 3 further include:
Step 4: obtain chase after color printer printing the Target Photo the spectroscopic data for chasing after color color lump figure, and by its with
The spectroscopic data of the original color lump figure of the Target Photo of target printer printing is compared, if the difference of the two is beyond default
Error range then chases after color printer according to the spectroscopic data update for chasing after color color lump figure for the Target Photo for chasing after the printing of color printer
The reverse lookup tablesAnd return step 22, it so recycles, until the difference of the two in the default error, terminates
Chase after color process.
The beneficial effect of above-mentioned further scheme is: by the way that the Target Photo for chasing after the printing of color printer is chased after color color
The spectroscopic data of block figure is compared with the spectroscopic data of the original color lump figure of target printer printing Target Photo, it can be determined that
Within the set range whether the difference of the two, and carry out circulation when the difference of the two is more than setting range and chase after color, until the two
Difference in the default error, reach satisfied and chase after color effect.
Further, the spectroscopic data update for chasing after color color lump figure that the basis chases after the Target Photo of color printer printing chases after color
The reverse lookup tables of printerSpecific implementation are as follows:
The spectroscopic data for chasing after color color lump figure for chasing after the Target Photo of color printer printing is converted into Lab space, generation pair
The Lab space data answered generate the forward lookup table for chasing after color printer using the method for such as described step 21With reversely look into
Look for tableAnd the reverse lookup tables that color printer will be chased afterAnd reverse lookup tablesIt is chased after after merging as updated
The reverse lookup tables of color printer
The beneficial effect of above-mentioned further scheme is: by chasing after color color lump figure according to chasing after color printer and print Target Photo
Spectroscopic data generate and chase after the reverse lookup tables of color printerAnd reverse lookup tablesAnd conduct after merging the two
The updated reverse lookup tables for chasing after color printerCan more accurate realization chase after color so that chase after color printing
The printing effect of machine is more nearly the printing effect of target printer, and it is as small as possible to chase after color color difference, and it is good to chase after color effect.
The present invention also provides a kind of ink-jet printers to chase after colour system system, including obtains module, chases after color module and control module；
The acquisition module, for obtaining target printer respectively and chasing after the spectrum number of color printer printing reset condition
According to, and the spectroscopic data is pre-processed；
Described to chase after color module, the color that chases after for chasing after color printer according to the pretreated spectroscopic data generation is searched
Table；
The control module chases after color printer printing Target Photo for chasing after the control of color look-up table according to.
Ink-jet printer of the invention chases after colour system system, and by obtaining, module obtains target printer and to chase after color printer original
The spectroscopic data of state, and pre-processed, color module, which is chased after, according to the foundation of the spectroscopic data of pretreated reset condition chases after color
Printer chases after color look-up table, and control module prints Target Photo according to the color look-up table that chases after for chasing after color printer, realizes ink-jet
The automatical and efficient of printer chases after color, easy to operate without relying on senior toning personnel, saves cost, and the color difference for chasing after color is small,
It is good to the reduction effect of grayscale image.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, the computer
When program is executed by processor, realize that the ink-jet printer chases after color method.
The present invention also provides a kind of ink-jet printers to chase after color equipment, which is characterized in that including memory, processor and
The computer program that can be run in the memory and on the processor is stored, the processor executes the computer
The step of ink-jet printer chases after color method is realized when program.
Detailed description of the invention
Fig. 1 is that ink-jet printer of the invention chases after color method flow diagram；
Fig. 2 is that ink-jet printer of the invention chases after color system structure diagram.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
It should be noted that the ink-jet printer in the present invention can be common four colors printer, channel color includes
Magenta, cyan, yellow and black, are also possible to surpass four color printers, and channel color includes magenta, cyan, yellow, black, red
Color, blue, green, orange etc..In the embodiment of the present invention, including printer A and printer B, printer A are target prints
Machine, printer B are to chase after color printer, and printer A is also possible to the printer B approved before a period of time by chasing after color.
As shown in Figure 1, a kind of ink-jet printer chases after color method, include the following steps:
Step 1: obtaining target printer respectively and chase after the spectroscopic data of the reset condition of color printer printing, and to described
Spectroscopic data is pre-processed；
Step 2: generated according to the pretreated spectroscopic data chase after color printer chase after color look-up table；
Step 3: according to it is described chase after color look-up table control chase after color printer printing Target Photo.
Ink-jet printer provided in an embodiment of the present invention chases after color method, former by obtaining target printer and chasing after color printer
The spectroscopic data of beginning state is simultaneously pre-processed, and then chases after color printing according to the foundation of the spectroscopic data of pretreated reset condition
Machine chases after color look-up table, and prints Target Photo according to the color look-up table that chases after for chasing after color printer, realizes ink-jet printer oneself
It is dynamic efficiently to chase after color, it is easy to operate without relying on senior toning personnel, cost is saved, and the color difference for chasing after color is small, to grayscale image
Reduction effect is good.
In the embodiment of the present invention, the step 1 is specifically included:
Step 11: target printer being measured using luminosity protractor respectively and chases after the original of the Target Photo of color printer printing
The spectroscopic data of beginning color lump figure；
Step 12: the spectroscopic data being converted into the corresponding Lab value of Lab space and generates the corresponding Lab of target printer
Spatial data Lab space data corresponding with color printer is chased after；
Step 13: respectively by the corresponding Lab space data of target printer Lab space data corresponding with color printer is chased after
It is smoothed.
In above-described embodiment, it can accurately measure target printer by the luminosity protractor and chase after color printer and beat
The spectroscopic data of the original color lump figure of print, then the spectroscopic data is transformed into Lab space, it is corresponding to generate target printer
Lab space data Lab space data corresponding with color printer is chased after, then after being smoothed, can be obtained it is corresponding more
Accurate Lab space data generate corresponding first color lookup table according to Lab space data convenient for subsequent.
Here, in step 11, it is assumed that the Color Channel number of printer is n, and each channel ink magnitude range is 0 to 100, to each
L is divided between the uniform sampling of channel, then color lump combination total number is ln, target printer and chase after color printer and print target figure respectively
The color lump figure of piece, then with the spectroscopic data of spectrophotometer measurement printing color lump.
Used in the step 12 Convex Hull Method establish respectively target printer gamut map and chase after color printer gamut map for
The prior art, which is not described herein again.
In an embodiment of the present invention, the step 2 specifically includes:
Step 21: corresponding with color printer is chased after according to the corresponding Lab space data of target printer after smoothing processing
Lab space data generate the first color lookup table of target printer respectively and chase after the first color lookup table of color printer；
Step 22: color gamut conversion processing being carried out to the first color lookup table of target printer, generates target printer
Second color lookup table；
Step 23: the constant processing of gray scale being carried out to second color lookup table of target printer, obtains target print
The third color lookup table of machine；
Step 24: color is chased after according to the third color lookup table of target printer and the first look-up table generation for chasing after color printer
Printer chases after color look-up table.
Pass through the corresponding Lab space data of the target printer Lab space corresponding with color printer is chased after after smoothing processing
Data can correspond to obtain target printer and chase after the first color lookup table of color printer, can be by spectroscopic data from a face
Color space transformation chases after color to another color space, convenient for realizing by different color space conversions, restores Target Photo
Color.
Here, what color lookup table saved is color-conversion table of the color space to another color space, can be with
Color value by inputting one group of color space obtains the output valve of another group of color space.Target printer chases after color printer
Corresponding color lookup table includes the forward lookup table and reverse lookup tables of corresponding printer.The input of printer forward lookup table
It is the black magnitude in each channel, output is corresponding Lab value, and the input of reverse lookup tables is Lab value, and output is each channel ink amount
Value.
Specifically, on the basis of the above embodiments, the specific implementation of the step 21 are as follows:
Lab space data corresponding with color printer is chased after to the corresponding Lab space data of pretreated target printer
Interpolation processing is carried out respectively, obtains the first color lookup table of the target printer and chases after the first color lookup of color printer
Table；
Wherein, the first color lookup table of the target printer includes to the corresponding Lab space data of target printer
The forward lookup table that positive interpolation processing and reverse interpolation are handled is carried out respectivelyAnd reverse lookup tablesIt is described
The first color lookup table for chasing after color printer includes being carried out at positive interpolation respectively to chasing after the corresponding Lab space data of color printer
The forward lookup table that reason and reverse interpolation are handledAnd reverse lookup tables
By to the corresponding Lab space data of target printer Lab space data corresponding with color printer is chased after respectively into
Row interpolation processing, the first color lookup table of the available target printer and the first color lookup for chasing after color printer
Table；To realize the Lab space value of spectroscopic data and target printer or chase after mutually reflecting between the black magnitude of color printer
It penetrates, is easy to implement different color space conversions.
Specifically, on the basis of the above embodiments, the step 22 specifically includes
Step 221: to the reverse lookup tables of target printerIt is sampled, and obtains the Target Photo in Lab
The black magnitude of the corresponding target printer output of the Lab value in space；
Step 222: using the black magnitude of target printer output as input to the forward lookup table of the target printerInterpolation is carried out, the Lab value of target printer output is obtained；
Step 223: being exported according to each pixel of the Target Photo in the Lab value and target printer of Lab space
Corresponding Lab value generates the second color lookup table Lut of target printer1。
Pass through the reverse lookup tables to the target printerSampling processing is carried out, and using the result of sampling as defeated
Enter the forward lookup table to the target printerInterpolation is carried out, according to each pixel of the Target Photo in Lab sky
Between Lab value and target printer output correspondence Lab value generate target printer the second color lookup table Lut1, pass through in this way
It is converted after color twice, realizes the conversion from Target Photo colour gamut to target printer colour gamut.
Specifically, on the basis of the above embodiments, the specific implementation of the step 23 are as follows:
Step 231: according to the second color lookup table Lut1Calculate its saturation degree color difference for inputting Lab value and gray color
ΔE′ab；
Step 232: as the second color lookup table Lut1Input Lab value and gray color saturation degree color difference Δ E 'ab
When meeting setting condition, according to the following formula to the second color lookup table Lut1Output Lab value carry out the constant place of gray scale
Reason, obtains the third color lookup table Lut of target printer2；
a2=a1
b2=b1
The setting condition are as follows:
ΔE′ab≤α
Wherein, in Lab space, l indicates brightness, and a and b indicate coloration；The second color lookup table Lut1Input Lab
Value and output Lab value are respectively (l1,a1,b1) and (l2,a2,b2), lmaxAnd lminRespectively indicate the second color lookup table Lut1's
Input the maximum value and minimum value of brightness in Lab value, l 'maxWith l 'minRespectively indicate the second color lookup table Lut1Output Lab
The maximum value and minimum value of brightness in value, α indicate the second color lookup table Lut1Input Lab value and gray color saturation
Spend color difference threshold.
By calculating the second color lookup table Lut1Input the saturation degree color difference Δ E ' of Lab value and gray colorab, and meeting
When preset condition, to the second color lookup table Lut1Output Lab value carry out the constant processing of gray scale, obtain target printer
Third color lookup table Lut2, the accurate gray scale rendition for realizing Target Photo, convenient for efficiently chasing after for subsequent realization Target Photo
Color.
It is assumed that the second color lookup table Lut1Input Lab value and output Lab value be respectively (l1,a1,b1) and (l2,
a2,b2), saturation degree color difference can be expressed as follows:
Since a, b value of gray color are all 0, then with the saturation degree color difference of input value and gray scale are as follows:
The second color lookup table Lut is calculated first1The maximum value l of input value brightness lmaxWith minimum value lmin, calculate defeated
It is worth the maximum value l ' of brightness l ' outmaxWith minimum value l 'min, (usual second color that imposes a condition then is met to input value
Look-up table Lut1Input Lab value and gray color saturation degree color difference threshold α take output valve 3) carry out the constant processing of gray scale, it is right
Second color lookup table Lut1All output valves carry out the constant processing of gray scale after obtain third color lookup table Lut2。
Specifically, on the basis of the above embodiments, the specific implementation of the step 24 are as follows:
Step 241: the third color being inquired according to the Lab value of the corresponding spectroscopic data of target printer and is looked into
Look for table Lut2, obtain the corresponding output Lab value of target printer；
Step 242: the reverse lookup tables of color printer are chased after according to the inquiry of the output Lab value of target printer
The corresponding black magnitude for chasing after color printer output is obtained, the Lab value including each pixel in the Target Photo is generated and chases after color and beat
The corresponding black magnitude of print machine output chases after color look-up table.
The third color lookup table is inquired by the Lab value of the corresponding spectroscopic data of target printer
Lut2, the corresponding output Lab value of target printer can be accurately obtained, in this way, the output Lab value according to target printer is looked into
The reverse lookup tables of color printer are chased after described in inquiryThe corresponding black magnitude for chasing after color printer output can be obtained, to generate
Color look-up table is chased after, it is complete will pass through the corresponding black magnitude that the Lab value lookup of each pixel in Target Photo chases after color printer output
It is printed at color is chased after.
In an embodiment of the present invention, the step 3 specifically includes:
Color look-up table is chased after according to the inquiry of the Lab value of each pixel in the Target Photo, obtains the target figure
The black magnitude of correspondence for chasing after color printer output of each pixel in piece, and chase after color printer described in control and complete the Target Photo
Printing.
It is corresponding by the Lab value for chasing after each pixel that color look-up table can be inquired accurately in the Target Photo
The black magnitude for chasing after color printer output chases after color printer in this way and realizes that chasing after color prints, and realizes efficient according to the black magnitude of output
Chase after color.
Preferably, in the embodiment of the present invention, the ink-jet printer chases after color method, after step 3 further include:
Step 4: obtain chase after color printer printing the Target Photo the spectroscopic data for chasing after color color lump figure, and by its with
The spectroscopic data of the original color lump figure of the Target Photo of target printer printing is compared, if the difference of the two is beyond default
Error range then chases after color printer according to the spectroscopic data update for chasing after color color lump figure for the Target Photo for chasing after the printing of color printer
The reverse lookup tablesAnd (circulation executes step 22, step 23, step 24, step 3 for return step 22, so circulation
With step 4), up to the difference of the two is in the default error, end chases after color process.
By the way that the spectroscopic data and target printer for chasing after color color lump figure of the Target Photo of color printer printing will be chased after
The spectroscopic data for printing the original color lump figure of Target Photo is compared, it can be determined that whether the difference of the two is in setting range
It is interior, and carry out circulation when the difference of the two is more than setting range and chase after color, until the difference of the two is in the default error, reach
Color effect is chased after to satisfied.
Specifically, in the above-described embodiments, what the basis chased after the Target Photo of color printer printing chases after color color lump figure
Spectroscopic data updates the reverse lookup tables for chasing after color printerSpecific implementation are as follows:
The spectroscopic data for chasing after color color lump figure for chasing after the Target Photo of color printer printing is converted into Lab space, generation pair
The Lab space data answered generate the forward lookup table for chasing after color printer using the method for such as described step 21With reversely look into
Look for tableAnd the reverse lookup tables that color printer will be chased afterAnd reverse lookup tablesIt is chased after after merging as updated
The reverse lookup tables of color printer
By chasing after color printer according to the spectroscopic data generation for chasing after color color lump figure for chasing after color printer printing Target Photo
Reverse lookup tablesAnd reverse lookup tablesAnd the described anti-of color printer is chased after as updated after merging the two
To look-up tableCan more accurate realization chase after color beaten so that the printing effect for chasing after color printer is more nearly target
The printing effect of print machine, it is as small as possible to chase after color color difference, and it is good to chase after color effect.
Here, the reverse lookup tables of color printer will be chased afterAnd reverse lookup tablesMerge specifically: will be described anti-
To look-up tableIn data be incorporated into reverse lookup tablesIn (or reverse lookup tablesIn data merge
To the reverse lookup tablesIn), identical data are removed, and different data retain, and seek union similar to two manifolds
Process, the updated reverse lookup tables for chasing after color printer can be made in this wayComprising more Lab values with it is defeated
The corresponding relationship between black magnitude out, so that the printing effect for chasing after color printer is more nearly the printing effect of target printer
Fruit is realized and more accurate chases after color.
As shown in Fig. 2, the present invention also provides a kind of ink-jet printers to chase after colour system system, including obtains module, chases after color module
And control module；
The acquisition module, for obtaining target printer respectively and chasing after the spectrum number for the reset condition that color printer prints
According to, and the spectroscopic data is pre-processed；
Described to chase after color module, the color that chases after for chasing after color printer according to the pretreated spectroscopic data generation is searched
Table；
The control module chases after color printer printing Target Photo for chasing after the control of color look-up table according to.
Ink-jet printer of the invention chases after colour system system, and by obtaining, module obtains target printer and to chase after color printer original
The spectroscopic data of state, and pre-processed, color module, which is chased after, according to the foundation of the spectroscopic data of pretreated reset condition chases after color
Printer chases after color look-up table, and control module prints Target Photo according to the color look-up table that chases after for chasing after color printer, realizes ink-jet
The automatical and efficient of printer chases after color, easy to operate without relying on senior toning personnel, saves cost, and the color difference for chasing after color is small,
It is good to the reduction effect of grayscale image.
In an embodiment of the present invention, the acquisition module is specifically used for:
Target printer is measured using luminosity protractor respectively and chases after the original color lump of the Target Photo of color printer printing
The spectroscopic data of figure；
The spectroscopic data is converted into the corresponding Lab value of Lab space, generates the corresponding Lab space number of target printer
According to Lab space data corresponding with color printer is chased after；
The corresponding Lab space data of target printer Lab space data corresponding with color printer is chased after are carried out respectively flat
Sliding processing.
Target printer can be accurately measured by the luminosity protractor and chases after the original color lump of color printer printing
The spectroscopic data of figure, then the spectroscopic data is transformed into Lab space, generate the corresponding Lab space data of target printer and
The corresponding Lab space data of color printer are chased after, then after being smoothed, corresponding more accurate Lab space can be obtained
Data generate corresponding first color lookup table according to Lab space data convenient for subsequent.
In embodiment provided by the invention, the color module that chases after includes:
First submodule according to the corresponding Lab space data of target printer after smoothing processing and chases after color printer pair
The Lab space data answered generate the first color lookup table of target printer respectively and chase after the first color lookup of color printer
Table；
Second submodule carries out color gamut conversion processing to the first color lookup table of target printer, generates target print
Second color lookup table of machine；
Third submodule carries out the constant processing of gray scale to second color lookup table of target printer, obtains target
The third color lookup table of printer；
4th submodule is generated according to the third color lookup table of target printer and the first look-up table for chasing after color printer
Chase after color printer chases after color look-up table.
Pass through the corresponding Lab space data of the target printer Lab space corresponding with color printer is chased after after smoothing processing
Data can correspond to obtain target printer and chase after the first color lookup table of color printer, can be by spectroscopic data from a face
Color space transformation chases after color to another color space, convenient for realizing by different color space conversions, restores Target Photo
Color.
In the embodiment of the present invention, first submodule is specifically used for:
Lab space data corresponding with color printer is chased after to the corresponding Lab space data of pretreated target printer
Interpolation processing is carried out respectively, obtains the first color lookup table of the target printer and chases after the first color lookup of color printer
Table；
Wherein, the first color lookup table of the target printer includes to the corresponding Lab space data of target printer
The forward lookup table that positive interpolation processing and reverse interpolation are handled is carried out respectivelyAnd reverse lookup tablesIt is described
The first color lookup table for chasing after color printer includes being carried out at positive interpolation respectively to chasing after the corresponding Lab space data of color printer
The forward lookup table that reason and reverse interpolation are handledAnd reverse lookup tables
By to the corresponding Lab space data of target printer Lab space data corresponding with color printer is chased after respectively into
Row interpolation processing, the first color lookup table of the available target printer and the first color lookup for chasing after color printer
Table；To realize the Lab space value of spectroscopic data and target printer or chase after mutually reflecting between the black magnitude of color printer
It penetrates, is easy to implement different color space conversions.
In the embodiment of the present invention, the second submodule is specifically used for:
To the reverse lookup tables of target printerIt is sampled, and obtains the Target Photo in the Lab of Lab space
It is worth the black magnitude of corresponding target printer output；
Using the black magnitude of target printer output as input to the forward lookup table of the target printerIt carries out
Interpolation obtains the Lab value of target printer output；
The correspondence Lab value exported according to each pixel of the Target Photo in the Lab value and target printer of Lab space
Generate the second color lookup table Lut of target printer1。
Pass through the reverse lookup tables to the target printerSampling processing is carried out, and using the result of sampling as defeated
Enter the forward lookup table to the target printerInterpolation is carried out, according to each pixel of the Target Photo in Lab sky
Between Lab value and target printer output correspondence Lab value generate target printer the second color lookup table Lut1, pass through in this way
It is converted after color twice, realizes the conversion from Target Photo colour gamut to target printer colour gamut.
In an embodiment of the present invention, the third submodule is specifically used for:
According to the second color lookup table Lut1Calculate its saturation degree color difference Δ E ' for inputting Lab value and gray colorab；
As the second color lookup table Lut1Input Lab value and gray color saturation degree color difference Δ E 'abMeet setting
When condition, according to the following formula to the second color lookup table Lut1Output Lab value carry out the constant processing of gray scale, obtain mesh
Mark the third color lookup table Lut of printer2；
a2=a1
b2=b1
The setting condition are as follows:
ΔE′ab≤α
Wherein, in Lab space, l indicates brightness, and a and b indicate coloration；The second color lookup table Lut1Input Lab
Value and output Lab value are respectively (l1,a1,b1) and (l2,a2,b2), lmaxAnd lminRespectively indicate the second color lookup table Lut1's
Input the maximum value and minimum value of brightness in Lab value, l 'maxWith l 'minRespectively indicate the second color lookup table Lut1Output Lab
The maximum value and minimum value of brightness in value, α indicate the second color lookup table Lut1Input Lab value and gray color saturation
Spend color difference threshold.
By calculating the second color lookup table Lut1Input the saturation degree color difference Δ E ' of Lab value and gray colorab, and meeting
When preset condition, to the second color lookup table Lut1Output Lab value carry out the constant processing of gray scale, obtain target printer
Third color lookup table Lut2, the accurate gray scale rendition for realizing Target Photo, convenient for efficiently chasing after for subsequent realization Target Photo
Color.
In an embodiment of the present invention, the 4th submodule is specifically used for:
The third color lookup table is inquired according to the Lab value of the corresponding spectroscopic data of target printer
Lut2, obtain the corresponding output Lab value of target printer；
The reverse lookup tables of color printer are chased after according to the inquiry of the output Lab value of target printerAcquisition chases after color
The corresponding black magnitude of printer output, generates the Lab value including each pixel in the Target Photo and chases after color printer output
Corresponding black magnitude chase after color look-up table.
The third color lookup table is inquired by the Lab value of the corresponding spectroscopic data of target printer
Lut2, the corresponding output Lab value of target printer can be accurately obtained, in this way, the output Lab value according to target printer is looked into
The reverse lookup tables of color printer are chased after described in inquiryThe corresponding black magnitude for chasing after color printer output can be obtained, to generate
Color look-up table is chased after, it is complete will pass through the corresponding black magnitude that the Lab value lookup of each pixel in Target Photo chases after color printer output
It is printed at color is chased after.
In an embodiment of the present invention, the control module is specifically used for:
Color look-up table is chased after according to the inquiry of the Lab value of each pixel in the Target Photo, obtains the target figure
The black magnitude of correspondence for chasing after color printer output of each pixel in piece, and chase after color printer described in control and complete the Target Photo
Printing.
It is corresponding by the Lab value for chasing after each pixel that color look-up table can be inquired accurately in the Target Photo
The black magnitude for chasing after color printer output chases after color printer in this way and realizes that chasing after color prints, and realizes efficient according to the black magnitude of output
Chase after color.
Preferably, on the basis of the above embodiments, the ink-jet printer chases after color system control module and is also used to:
The spectroscopic data for chasing after color color lump figure for chasing after the Target Photo of color printer printing is obtained, and it is beaten with target
The spectroscopic data of the original color lump figure of print machine printing Target Photo is compared, if the difference of the two exceeds default error model
It encloses, is then updated according to the spectroscopic data for chasing after color color lump figure for the Target Photo for chasing after the printing of color printer and chase after the described anti-of color printer
To look-up tableAnd repeat above-mentioned generation chase after color look-up table, printing Target Photo chase after color color lump figure and circulation chases after color mistake
Journey, until the difference of the two, in the default error, end chases after color process.
By the way that the spectroscopic data and target printer for chasing after color color lump figure of the Target Photo of color printer printing will be chased after
The spectroscopic data for printing the original color lump figure of Target Photo is compared, it can be determined that whether the difference of the two is in setting range
It is interior, and carry out circulation when the difference of the two is more than setting range and chase after color, until the difference of the two is in the default error, reach
Color effect is chased after to satisfied.
Specifically, in the above-described embodiments, what the basis chased after the Target Photo of color printer printing chases after color color lump figure
Spectroscopic data updates the reverse lookup tables for chasing after color printerSpecific implementation are as follows:
Above-mentioned first color lookup is used according to the spectroscopic data for chasing after color color lump figure for chasing after color printer printing Target Photo
The generation method of table generates the reverse lookup tables for chasing after color printerAnd reverse lookup tablesAnd color printer will be chased after
Forward lookup tableAnd reverse lookup tablesAs the updated reverse lookup tables for chasing after color printer after merging
By chasing after color printer according to the spectroscopic data generation for chasing after color color lump figure for chasing after color printer printing Target Photo
Reverse lookup tablesAnd reverse lookup tablesAnd the described anti-of color printer is chased after as updated after merging the two
To look-up tableCan more accurate realization chase after color beaten so that the printing effect for chasing after color printer is more nearly target
The printing effect of print machine, it is as small as possible to chase after color color difference, and it is good to chase after color effect.
The present invention also provides a kind of computer storage mediums, are stored thereon with computer program, the computer program
When being executed by processor, realize that the ink-jet printer chases after color method.
The present invention also provides a kind of ink-jet printers to chase after color equipment, which is characterized in that including memory, processor and
The computer program that can be run in the memory and on the processor is stored, the processor executes the computer
The step of ink-jet printer chases after color method is realized when program.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of ink-jet printer chases after color method, which comprises the steps of:
Step 1: obtaining target printer respectively and chase after the spectroscopic data of color printer printing reset condition, and to the spectrum number
According to being pre-processed；
Step 2: generated according to the pretreated spectroscopic data chase after color printer chase after color look-up table；
Step 3: according to it is described chase after color look-up table control chase after color printer printing Target Photo.
2. ink-jet printer according to claim 1 chases after color method, which is characterized in that the step 1 specifically includes:
Step 11: target printer being measured using luminosity protractor respectively and chases after the original color of the Target Photo of color printer printing
The spectroscopic data of block figure；
Step 12: the spectroscopic data being converted into the corresponding Lab value of Lab space and generates the corresponding Lab space of target printer
Data Lab space data corresponding with color printer is chased after；
Step 13: respectively carrying out the corresponding Lab space data of target printer Lab space data corresponding with color printer is chased after
Smoothing processing.
3. ink-jet printer according to claim 2 chases after color method, which is characterized in that the step 2 specifically includes:
Step 21: empty according to the corresponding Lab space data of the target printer Lab corresponding with color printer is chased after after smoothing processing
Between data generate the first color lookup table of target printer and chase after the first color lookup table of color printer respectively；
Step 22: color gamut conversion processing being carried out to the first color lookup table of target printer, generates the second of target printer
Color lookup table；
Step 23: the constant processing of gray scale being carried out to second color lookup table of target printer, obtains target printer
Third color lookup table；
Step 24: color printing is chased after according to the third color lookup table of target printer and the first look-up table generation for chasing after color printer
Machine chases after color look-up table.
4. ink-jet printer according to claim 3 chases after color method, which is characterized in that the specific implementation of the step 21
Are as follows:
The corresponding Lab space data of pretreated target printer Lab space data corresponding with color printer is chased after are distinguished
Interpolation processing is carried out, the first color lookup table of the target printer is obtained and chases after the first color lookup table of color printer；
Wherein, the first color lookup table of the target printer includes distinguishing the corresponding Lab space data of target printer
Carry out the forward lookup table that positive interpolation processing and reverse interpolation are handledAnd reverse lookup tablesIt is described to chase after color
First color lookup table of printer include to chase after the corresponding Lab space data of color printer carry out respectively positive interpolation processing and
The forward lookup table that reverse interpolation is handledAnd reverse lookup tables
5. ink-jet printer according to claim 4 chases after color method, which is characterized in that the step 22 specifically includes:
Step 221: to the reverse lookup tables of target printerIt is sampled, and obtains the Target Photo in Lab space
The corresponding target printer output of Lab value black magnitude；
Step 222: using the black magnitude of target printer output as input to the forward lookup table of the target printer
Interpolation is carried out, the Lab value of target printer output is obtained；
Step 223: the correspondence exported according to each pixel of the Target Photo in the Lab value and target printer of Lab space
Second color lookup table Lut of Lab value generation target printer1。
6. ink-jet printer according to claim 3 chases after color method, which is characterized in that the specific implementation of the step 23
Are as follows:
Step 231: according to the second color lookup table Lut1Calculate its saturation degree color difference Δ for inputting Lab value and gray color
E′ab；
Step 232: as the second color lookup table Lut1Input Lab value and gray color saturation degree color difference Δ E 'abMeet
When setting condition, according to the following formula to the second color lookup table Lut1Output Lab value carry out the constant processing of gray scale, obtain
To the third color lookup table Lut of target printer2；
a2=a1
b2=b1
The setting condition are as follows:
ΔE′ab≤α
Wherein, in Lab space, l indicates brightness, and a and b indicate coloration；The second color lookup table Lut1Input Lab value and
Exporting Lab value is respectively (l1,a1,b1) and (l2,a2,b2), lmaxAnd lminRespectively indicate the second color lookup table Lut1Input
The maximum value and minimum value of brightness, l ' in Lab valuemaxWith l 'minRespectively indicate the second color lookup table Lut1Output Lab value in
The maximum value and minimum value of brightness, α indicate the second color lookup table Lut1Input Lab value and gray color saturation degree color
Poor threshold value.
7. ink-jet printer according to claim 4 chases after color method, which is characterized in that the specific implementation of the step 24
Are as follows:
Step 241: the third color lookup table is inquired according to the Lab value of the corresponding spectroscopic data of target printer
Lut2, obtain the corresponding output Lab value of target printer；
Step 242: the reverse lookup tables of color printer are chased after according to the inquiry of the output Lab value of target printerIt obtains
The corresponding black magnitude for chasing after color printer output, generates the Lab value including each pixel in the Target Photo and chases after color printer
The corresponding black magnitude of output chases after color look-up table.
8. ink-jet printer according to claim 7 chases after color method, which is characterized in that the step 3 specifically includes:
Color look-up table is chased after according to the inquiry of the Lab value of each pixel in the Target Photo, is obtained in the Target Photo
Each pixel chases after the corresponding black magnitude of color printer output, and chases after the color printer completion Target Photo described in control and beat
Print.
9. ink-jet printer according to claim 4 chases after color method, which is characterized in that after step 3 further include:
Step 4: obtaining the spectroscopic data for chasing after color color lump figure for chasing after the Target Photo of color printer printing, and by itself and target
The spectroscopic data of the original color lump figure of the Target Photo of printer printing is compared, if the difference of the two exceeds default error
Range then chases after the described of color printer according to the spectroscopic data update for chasing after color color lump figure for the Target Photo for chasing after the printing of color printer
Reverse lookup tablesAnd return step 22, it so recycles, until the difference of the two, in the default error, end chases after color
Process.
10. ink-jet printer according to claim 9 chases after color method, which is characterized in that the basis chases after color printer and beats
The spectroscopic data for chasing after color color lump figure of the Target Photo of print updates the reverse lookup tables for chasing after color printerSpecific reality
It is existing are as follows:
The spectroscopic data for chasing after color color lump figure for chasing after the Target Photo of color printer printing is converted into Lab space, is generated corresponding
Lab space data generate the forward lookup table for chasing after color printer using the method for such as described step 21And reverse lookup tablesAnd the reverse lookup tables that color printer will be chased afterAnd reverse lookup tablesIt is beaten after merging as the updated color that chases after
The reverse lookup tables of print machine
11. a kind of ink-jet printer chases after colour system system, which is characterized in that including obtaining module, chasing after color module and control module；
The acquisition module, for obtaining target printer respectively and chasing after the spectroscopic data of color printer printing reset condition, and
The spectroscopic data is pre-processed；
It is described to chase after color module, for generated according to the pretreated spectroscopic data chase after color printer chase after color look-up table；
The control module chases after color printer printing Target Photo for chasing after the control of color look-up table according to.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
When being executed by processor, realize that the described in any item ink-jet printers of claim 1-10 chase after color method.
13. a kind of ink-jet printer chases after color equipment, which is characterized in that including memory, processor and be stored in the storage
In device and the computer program that can run on the processor, the processor are realized when executing the computer program as weighed
The step of benefit requires any one of 1 to 10 ink-jet printer to chase after color method.
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