CN101279531A - Method for confirming ink-supplying amount of printing machine - Google Patents

Abstract

The invention relates to a method for determining ink feeding amount of a printing machine, which can effectively solve the problem of the ink feeding amount of the printing machine. The method comprises the steps that a paste-up software is used for pasting up images, graphs and files onto one layout to create a file in the format of PDF and the PDF file is subject to a gridding processing through the Phtoshop software to generate a color TLFF image; the mathematical modeling is performed by utilizing the parameter of the printing machine and combining the image color information provided by the color TLFF picture; the parameter and information are calculated to obtain the ink bond open value of each ink area on each color plate and the angle value of the distributer so as to build the computation model of ink area and ink amount; the computer programming is hired to obtain the ink amount generation program and the ink amount generation program is executed by the computer to obtain the atlas of ink area and ink amount; the printing machine is set to carry out the printing according to the atlas of ink area and ink amount. In the whole process, the production of datamation and standardization with convenient operation and good quality of the printing product is realized, thus saving the material and providing huge economic and social benefits.

Description

A kind of method of definite ink-supplying amount of printing machine

One, technical field

The present invention relates to printing process, particularly a kind of method of definite ink-supplying amount of printing machine.

Two, background technology

Recent years, the digitlization of the printing machine of producing both at home and abroad, automaticity all is significantly improved, wherein the ink-supplying amount of most of printing machine can be provided with by numerical value, adjust ink-supplying amount by the size of ink-covered area China ink key opening value and distributor rollers corner to galley, but under the prior art condition, in the print production process numerical value setting of China ink amount is still relied on the working experience of leader, and for the leader of lacking experience, the China ink amount of being provided with is the bottleneck in the printing link, Chang Yin adjusts ink-supplying amount repeatedly and has elongated the production cycle, has also reduced productive profit because of increasing of consumptive materials such as paper printing ink simultaneously.Though some high-end printing equipments have been furnished with the automatic setting that the CIP3/CIP4 interface is realized the China ink amount at present, but must adopt direct platemaking machine plate-making simultaneously, but most printing equipment environment does not possess the condition that is equipped with this interface, direct platemaking machine is not purchased in considerable printing house yet, the China ink amount is set to the bottleneck of printing process, therefore, how to determine that the problem of ink-supplying amount of printing machine is concerned about by people, its improvement is imperative.

Three, summary of the invention

At above-mentioned situation, the present invention's purpose just provides a kind of method of definite ink-supplying amount of printing machine, can effectively solve the problem of ink-supplying amount of printing machine, the technical scheme of its solution is, in the printed matter production process, at first by the distribution requirement of printing surface with layout software as Singnastation, softwares such as PageMaker, with image, figure, file is stitched on the space of a whole page (promptly pieces together big version), generate the PDF file, and then by Phtoshop software it is carried out rasterizing and handle, generate colored tiff image, utilize the ink transfer performance parameter of printing machine, transfer parameters and the printshop humiture parameter used of printing ink on paper, the color of image information that provides in conjunction with colored tiff image, carry out mathematical modeling, above parameter and information are gone up the black key opening value of each ink-covered area and the corner value of distributor rollers by calculating version of all kinds, set up ink-covered area China ink amount computation model, use computer programming, get black amount generator, carry out this program by computer, get ink-covered area China ink spirogram spectrum, by printer prints China ink amount collection of illustrative plates or computer and network system are set and show that the China ink amount is provided with the arbitrary approach of collection of illustrative plates and by the China ink amount collection of illustrative plates is set printing machine is set, print, draw printed matter, whole process has realized datumization, standardization is produced, the inventive method is simple, easy to operate, improved the quality and the competitiveness of print product greatly, save and produce consumptive material, create more Peak output, be that one on the press is created greatly, have broad application prospects that economic and social benefit is huge.

Four, description of drawings

Accompanying drawing is a process chart of the present invention.

Five, specific implementation method

Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.

Provided by accompanying drawing, the present invention is realized by following steps:

1, at first by the distribution requirement of printing surface with layout software as softwares such as Singnastation, PageMaker, image, figure, file be stitched on the space of a whole page (promptly piece together big version), big version file generated the PDF image;

2, by Phtoshop software the PDF image of above-mentioned generation is carried out rasterizing and handle, generate colored tiff image;

3, the color of image information that colored tiff image is provided, carry out mathematical modeling, method is, at first utilize the ink transfer performance parameter of printing machine, transfer parameters and the printshop humiture parameter used and the colored tiff image color of image information that provides of printing ink on paper, upward the black key opening value and the distributor rollers of each ink-covered area (are promptly given ink roller by calculating version of all kinds, as follows) the corner value, set up ink-covered area China ink amount computation model, use computer programming, draw China ink amount generator, carry out this program by computer, get ink-covered area China ink spirogram spectrum, collection of illustrative plates is set or collection of illustrative plates is set by printer prints China ink amount then, by the China ink amount collection of illustrative plates is set by the printing machine operating personnel printing machine is set by computer and network system demonstration China ink amount, print, can obtain high-quality printed matter;

The method for building up of said ink-covered area China ink amount computation model is:

(1) pixel value by tiff image obtains ink-covered area dot area coverage rate, the ink-supplying amount of printing process is to realize by the ink knife opening value (black key opening value) of controlling printing machine, the size of opening is to be determined by the shared dot area percentage of each color in the original image data, therefore, obtain the numerical value of ink-supplying amount, at first will calculate the dot area percentage that is distributed in each ink-covered area in the original image, the calculating dot area percentage can be realized with the 1-bit tiff file behind PDF, the EPS, TIFF or the process RIP that piece together after big edition;

Known conditions: printing machine forme width W (unit be centimetre), the resolution ratio r of original image (unit be pixel/centimetre), the width of original image and pixel count a and the b on the height, the ink-covered area quantity t that printing machine has;

1), calculate the shared ink-covered area of original copy picture and text quantity, determine the picture and text position

By above known conditions, can obtain the pixel count that distributes on ink-covered area width of corresponding original image, represent with p, calculate by formula (1):

P=Wr/t ... formula (1) (annotate: the P round off rounds)

If the shared ink-covered area of original image number is num, its value can be calculated by the pixel count p that distributes on the width a of image and each ink-covered area width, and its relational expression is provided by formula (2);

Image is by requirement printing down between two parties, and ink-covered area, picture and text center is positioned at the center of printing machine ink-covered area;

2), grey scale pixel value is converted to the ink-covered area dot area coverage

Known conditions: the bit depth of image is n, and (i, j) individual pixel corresponding gray is G to black version ink-covered area tiff image _k(i, j);

The dot area percentage S of this pixel then _k(i, j) (i=1,2 ... b; J=1,2 ... p), provide by formula (3);

S _k(i, j)=G _k(i, j)/(2 ⁿ-1) ... formula (3)

The area occupation ratio summation S of this site, ink-covered area _kGive calculating by formula (4), in like manner calculate green grass or young crops, product, yellow version ink-covered area dot area percentage summation S _c, S _m, S _y, provide by formula (5) (6) (7) respectively;

$S_k=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_k(i,j)$ Formula (4)

$S_c=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_c(i,j)$ Formula (5)

$S_m=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_m(i,j)$ Formula (6)

$S_y=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_y(i,j)$ Formula (7)

By ink-covered area dot area percentage summation S _k, S _c, S _m, S _yDivided by the ink-covered area sum of all pixels, can get the yellow four look dot area coverage rates of black blue or green product in the ink outlet zone, represent with K, C, M, Y respectively, provide by formula (8):

$\left\{\begin{array}{c}K=S_k/(p\·b)\\ C=S_c/(p\·b)\\ M=S_m/(p\·b)\\ Y=S_y/(p\·b)\end{array}\right.$ Formula (8)

S wherein _k, S _c, S _m, S _yThe dot area sum of representing all sites of corresponding color in each ink-covered area;

(2) ink-covered area dot area coverage value is converted to printing machine ink-covered area China ink amount setting value

1), determines maximum and minimum ink-supplying amount value according to paper parameter and ink in printing press transmission performance

Minimum ink-supplying amount value is m_Papermin, and maximum ink-supplying amount value is m_PaperMax, and its numerical value is listed in table 1;

Ink-supplying amount minimum of a value and maximum under the table 1 different paper parameter condition

	Ink-supplying amount minimum of a value (m_Papermin)	Ink-supplying amount maximum (m_PaperMax)
			Art paper	1	16
Offset paper	2	17
			Map paper	3	20

2), determine ink-covered area ink-supplying amount setting value

If the ink-covered area ink-supplying amount is k, c, m, y, its value is calculated by maximum ink-supplying amount value, minimum ink-supplying amount value and ink-covered area dot area coverage rate three, can calculate the black print ink-covered area by formula (9) and give the China ink value;

In like manner, China ink value c, m, y are given in the ink-covered area that can calculate green grass or young crops, product, yellow three look versions;

The value that following formula calculates need convert primary area China ink amount H and fine setting district China ink amount L two parts to, and black, green grass or young crops, product, yellow edition owner of all kinds district China ink are measured respectively with H _k, H _c, H _m, H _yExpression, fine setting district China ink amount is respectively with L _k, L _c, L _m, L _yExpression is obtained by formula (10);

$\left\{\begin{array}{c}{H}_k=\left[k\right]\\ L_k=(k-[k\left]\right)\·20\\ H_c=\left[c\right]\\ L_c=(c-[c\left]\right)\·20\\ H_m=\left[m\right]\\ L_m=(m-[m\left]\right)\·20\\ H_y=\left[y\right]\\ L_y=(y-[y\left]\right)\·20\end{array}\right.$ Formula (10)

(3) give ink roller corner value

The present invention has provided the setting value of giving the ink roller corner, and establishing to ink roller corner value is β, and each ink-covered area China ink amount of certain look version (with the black version is example, and other look version computational methods are identical) is H _k(i), wherein _KRepresent the black version, i=1,2,3,4 ..., t (t is the ink-covered area quantity of printing machine), when the look version is product, Huang, cyan with formula in H _kReplace to H respectively _m, H _y, H _c, then corner β is provided by formula (11):

(4) printing temperature and humidity conditions

The humiture parameter that said printshop is used is: 20 ℃-25 ℃, and humidity 60%, 20 ℃ of winter temperatures preferably wherein, humidity 60%, 22-25 ℃ of other seasonal temperature, humidity 60%.

Embodiment:

1. printing condition

Printing machine: Heidelberg CD102; Paper: golden eastern board (157 gram) art paper; Printing ink: day lion board; Temperature: 25 ℃; Humidity: 60%;

2, prepare to calculate the original copy of usefulness

The file conversion that at first will piece together the back generation of big version becomes PDF, utilizes Photoshop software to be converted into the image of tiff format again, and resolution ratio is 81.28DPI, with this master copy data that calculates as the China ink amount;

3, calculate ink-covered area China ink value

Start ink-covered area China ink amount software for calculation, at first the primary condition image resolution ratio 81.28dpi that ink-covered area China ink amount is calculated is set according to physical condition, space of a whole page maximum 1030mm, printing environment: paper art paper, printing ink are day lion boards, 25 ℃ of temperature, humidity 60%, utilize China ink amount computation model to read in original copy then, adopt computation model can generate China ink amount data, performed computer step and the calculated value that obtains are as follows:

A, the shared ink-covered area of calculating original copy picture and text quantity are determined the picture and text position

Formula (1) in this step by specification is calculated:

P=Wr/t ... formula (1)

Because Heidelberg CD102 printing machine has 32 ink-covered areas, t=32; Galley width 1030mm, W=1030 is converted into an inch unit, W=1030/25.4; Graphics resolution r=81.28, substitution (1) formula can get the pixel count p that distributes on ink-covered area width of original image,

p＝1030/25.4×81.28/32＝103

If the shared ink-covered area of original image number is num, its value can be calculated by the pixel count p that distributes on the width a of image and each ink-covered area width, and its relational expression is provided by formula (2):

In this example, the width a=2719 of image with p value substitution (2) formula, obtains

num＝28

Image is by requirement printing down between two parties, and ink-covered area, picture and text center is positioned at the center of printing machine ink-covered area, accounts for the position of 28 ink-covered areas in 32 ink-covered areas;

B, grey scale pixel value is converted to the ink-covered area dot area coverage

Formula (3) (4) (5) (6) (7) (8) substep in this step by specification calculates, can obtain the dot area coverage value of green grass or young crops (C), product (M), yellow (Y), 32 ink-covered areas of black (K) version of all kinds, concrete numerical value is between the 0-1, as shown in table 2, there is not image-text area in 0 presentation video, promptly the dot area coverage rate of this ink-covered area is that the dot area coverage rate of image-text area in 0,1 presentation video is absolutely:

S _k(i, j)=G _k(i, j)/(2 ⁿ-1) ... formula (3)

$S_k=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_k(i,j)$ Formula (4)

$S_c=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_c(i,j)$ Formula (5)

$S_m=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_m(i,j)$ Formula (6)

$S_y=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=2}{\overset{p}{\mathrm{\Σ}}}{S}_y(i,j)$ Formula (7)

$\left\{\begin{array}{c}K=S_k/(p\·b)\\ C=S_c/(p\·b)\\ M=S_m/(p\·b)\\ Y=S_y/(p\·b)\end{array}\right.$ Formula (8)

Of all kinds edition ink-covered area of table 2 dot area coverage rate

The ink-covered area	C version ink-covered area dot area coverage rate	M version ink-covered area dot area coverage rate	Y version ink-covered area dot area coverage rate	Each ink-covered area dot area coverage rate of K
					1	0.000000000000000	0.000000000000000	0.000000000000000	0.000000000000000
2	0.000000000000000	0.000000000000000	0.000000000000000	0.000000000000000
					3	0.000053034276120	0.003249015135808	0.016354213673859	0.000000000000000
4	0.047027946156692	0.572726925312941	0.947974411825688	0.054544462197070
					5	0.068358031166022	0.522986079772983	0.845086960763986	0.060804742796974
6	0.060190224130291	0.403157968557525	0.767008777386136	0.041306444203226
					7	0.049507791505572	0.409432193777366	0.807993153720124	0.036093290727031
8	0.083032609270123	0.408118228423445	0.788982672894993	0.049291202692979
					9	0.063861988917483	0.430182926581373	0.782055713431962	0.048322580120582
10	0.067298504307383	0.423127355441451	0.696326466726023	0.052338305423766
					11	0.116745984315352	0.410280701540413	0.745902517756014	0.054915783439646
12	0.114858622694361	0.537965569391763	0.836794302626711	0.071855508531424
					13	0.130185691112439	0.540362478808650	0.842939895842227	0.078344635386811
14	0.068116764848174	0.553306765376688	0.824943936936168	0.068875405024129
					15	0.058712887186805	0.660472429900843	0.908098815723677	0.076412126534213
16	0.053183459160152	0.599698442511983	0.933591999934952	0.066568037955385
					17	0.044265671435483	0.551015904184606	0.946306281583751	0.051342545726564
18	0.066779158688149	0.530750122980978	0.852508832270209	0.060528574274412
					19	0.062147715399658	0.407414167408618	0.766394441666362	0.043097006582023
20	0.049230159407740	0.409039366109288	0.807765893004517	0.036133823631049
					21	0.082598476255524	0.407679094860005	0.788580880828384	0.048857821793449
22	0.064476853150549	0.431022246344111	0.786674716330654	0.048452431770967
					23	0.066645627772154	0.424578287047765	0.699608005756729	0.052471165534429
24	0.113389335414863	0.405995292166213	0.736306708459872	0.053632959715091
					25	0.114158627166396	0.533906627963232	0.836921897931887	0.070845336683295
26	0.133079504661081	0.539551007630919	0.842896659389445	0.078879775422506
					27	0.069807275595289	0.552344362999191	0.824762758514146	0.069188549149703
28	0.058196163806597	0.652622198371366	0.903457737231322	0.075516581088168
					29	0.056290995353149	0.626090038337541	0.935491618998833	0.070736523927423
30	0.000110438950617	0.012257239615730	0.059138909555114	0.000000000000000
					31	0.000000000000000	0.000000000000000	0.000000000000000	0.000000000000000
32	0.000000000000000	0.000000000000000	0.000000000000000	0.000000000000000

C, ink-covered area dot area coverage value is converted to printing machine ink-covered area China ink amount setting value

1), transmit performance according to paper parameter and ink in printing press and determine maximum and minimum ink-supplying amount value, as table 3:

Ink-supplying amount minimum of a value and maximum under the table 3 different paper parameter condition

	Ink-supplying amount minimum of a value (m_Papermin)	Ink-supplying amount maximum (m_PaperMax)
			Art paper	1	16
Offset paper	2	17
			Map paper	3	20

2), determine ink-covered area ink-supplying amount setting value

Can calculate black version ink-covered area by formula (9) and give the China ink value, in like manner, China ink value c is given in the ink-covered area that can calculate green grass or young crops, product, yellow three look versions, m, and y:

Calculate each primary area, ink-covered area according to formula (10) then and do not transfer the concrete China ink amount setting value in district,

$\left\{\begin{array}{c}{H}_k=\left[k\right]\\ L_k=(k-[k\left]\right)\·20\\ H_c=\left[c\right]\\ L_c=(c-[c\left]\right)\·20\\ H_m=\left[m\right]\\ L_m=(m-[m\left]\right)\·20\\ H_y=\left[y\right]\\ L_y=(y-[y\left]\right)\·20\end{array}\right.$ Formula (10)

Concrete each ink-covered area China ink amount set-point data is as shown in table 4:

Each ink-covered area China ink amount setting value of table 4

The ink-covered area number	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32
																																	Blue or green (primary area)	0	0	1	1	2	1	1	2	1	2	2	2	2	2	1	1	1	1	1	1	2	1	1	2	2	3	2	1	1	1	0	0
Blue or green (fine setting)	0	0	0	14	0	17	15	5	18	0	14	14	19	0	17	15	13	19	18	15	4	19	19	13	14	0	0	17	16	0	0	0
																																	Product (primary area)	0	1	1	9	8	7	7	7	7	7	7	9	9	9	10	10	9	8	7	7	7	7	7	7	9	9	9	10	10	1	1	0
Product (fine setting)	0	0	0	11	16	0	2	2	9	6	2	1	2	5	17	0	5	19	1	2	1	9	7	1	0	2	5	15	7	3	0	0
																																	Yellow (primary area)	0	1	1	15	13	12	13	12	12	11	12	13	13	13	14	15	15	13	12	13	12	12	11	12	13	13	13	14	15	1	1	0
Yellow (fine setting)	0	0	4	4	13	9	2	16	14	9	4	11	13	7	12	0	4	15	9	1	16	16	10	1	11	13	7	10	0	17	0	0
																																	Black (primary area)	0	0	1	1	1	1	1	1	1	1	1	2	2	2	2	1	1	1	1	1	1	1	1	1	2	2	2	2	2	1	0	0
Black (fine setting)	0	0	0	15	17	12	11	15	14	15	16	1	3	0	2	19	15	17	13	11	15	15	15	15	1	3	0	2	1	0	0	0

4, give ink roller corner value

With the China ink amount set-point data substitution formula (11) of the ink-covered area in the table 4, can obtain the setting value of version corner of all kinds,

The concrete result of calculation of corner value is as follows:

$\left\{\begin{array}{c}{\mathrm{\β}}_c=20\\ {\mathrm{\β}}_m=45\\ {\mathrm{\β}}_y=66\\ {\mathrm{\β}}_k=19\end{array}\right.$

β wherein _c, β _m, β _y, β _kThe corner value of the blue or green product yellow black of expression version after computer is carried out, generates ink-covered area ink-supplying amount collection of illustrative plates by the data in the table 4 respectively;

5, print ink-covered area China ink spirogram spectrum, by the black spirogram spectrum in printer prints ink-covered area, hand over the printing process leader, as the foundation of ink-covered area China ink amount setting;

6, printing machine is set, printing then according to the ink-supplying amount of map setting printing machine, by the normal condition printing, obtains high-quality printed matter.

In a word, learn by above, the present invention is mainly used in ink-supplying amount and sets by the China ink amount of the printing machine of setting value, no longer need printing equipment to have the CIP3/CIP4 interface, convenient and swift, under low cost, operate, eliminated the ink-supplying amount on the printing machine and set the situation of operating by the experience of leader, have general applicability, reached the datumization that printing enterprise produces, standardization production degree, improve printing product quality and competitiveness, save and produce consumptive material, create more Peak output, have broad application prospects, economic and social benefit is huge.

Claims (6)

1, a kind of method of definite ink-supplying amount of printing machine is characterized in that, is realized by following steps: at first the distribution requirement by printing surface is stitched to image, figure, file on the space of a whole page with layout software, and big version file is generated the PDF image; By Phtoshop software the PDF image of above-mentioned generation is carried out rasterizing and handle, generate colored tiff image; The color of image information that colored tiff image is provided, carry out mathematical modeling, method is, at first utilize the ink transfer performance parameter of printing machine, transfer parameters and the printshop humiture parameter used and the colored tiff image color of image information that provides of printing ink on paper, go up the black key opening value of each ink-covered area and the corner value of distributor rollers by calculating version of all kinds, set up ink-covered area China ink amount computation model, use computer programming, draw China ink amount generator, carry out this program by computer, get ink-covered area China ink spirogram spectrum, collection of illustrative plates is set or shows that by computer and network system the China ink amount is provided with collection of illustrative plates by printer prints China ink amount then, by the China ink amount collection of illustrative plates is set by printing machine printing machine is set, print;

The method for building up of said ink-covered area China ink amount computation model is:

(1) pixel value by tiff image obtains ink-covered area dot area coverage rate, be to determine by the shared dot area percentage of each color in the original image data, with calculating the dot area percentage that is distributed in each ink-covered area in the original image, the calculating dot area percentage is realized with piecing together the big edition 1-bit tiff file behind PDF, EPS, TIFF or the process RIP afterwards: calculate the shared ink-covered area of original copy picture and text quantity, determine the picture and text position, image is by requirement printing down between two parties, and ink-covered area, picture and text center is positioned at the center of printing machine ink-covered area; Grey scale pixel value is converted to the ink-covered area dot area coverage, divided by the ink-covered area sum of all pixels, can gets the yellow black four look dot area coverage rates of blue or green product in the ink outlet zone by ink-covered area dot area percentage summation;

(2) ink-covered area dot area coverage value is converted to printing machine ink-covered area China ink amount setting value, promptly determines maximum and minimum ink-supplying amount value according to paper parameter and ink in printing press transmission performance; Determine ink-covered area ink-supplying amount setting value, its value is calculated by maximum ink-supplying amount value, minimum ink-supplying amount value and ink-covered area dot area coverage rate three;

(3) give ink roller corner value, its value is provided by following formula:

Wherein β is to ink roller corner value, H _k(i) be each ink-covered area China ink amount of certain look version, wherein _KRepresent the black version, i=1,2,3,4 ..., t; T is the ink-covered area quantity of printing machine, when the look version is product, Huang, cyan with formula in H _kReplace to H respectively _m, H _y, H _c

2, the method for a kind of definite ink-supplying amount of printing machine according to claim 1 is characterized in that, said pixel value by tiff image obtains ink-covered area dot area coverage rate, is to be given by the following formula:

P=Wr/t ... formula (1)

Wherein W is the printing machine forme width, and r is the resolution ratio of original image, and a and b are respectively the width of original image and the pixel count on the height, and t is the ink-covered area quantity that printing machine has, and p is the pixel count that distributes on ink-covered area width of corresponding original image;

If the shared ink-covered area of original image number is num, its value can be calculated by the pixel count p that distributes on the width a of image and each ink-covered area width, and its relational expression is:

3, the method for a kind of definite ink-supplying amount of printing machine according to claim 1 is characterized in that, said grey scale pixel value is converted to the ink-covered area dot area coverage, and its ink-covered area dot area coverage is provided by following formula:

S _k(i, j)=G _k(i, j)/(2 ⁿ-1) ... formula (3)

Wherein n is the bit depth of image, G _k(i j) is black version ink-covered area tiff image (i, j) individual pixel corresponding gray, S _k(i, j) (i=1,2 ... b; J=1,2 ... p) be the dot area percentage of this pixel;

The area occupation ratio summation S of this site, ink-covered area _kGive calculating by formula (4), in like manner calculate green grass or young crops, product, yellow version ink-covered area dot area percentage summation S _c, S _m, S _y, provide by formula (5) (6) (7) respectively,

$S_k=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_k(i,j)$ Formula (4)

$S_c=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_c(i,j)$ Formula (5)

$S_m=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_m(i,j)$ Formula (6)

$S_y=\underset{j=1}{\overset{b}{\mathrm{\Σ}}}\underset{i=1}{\overset{p}{\mathrm{\Σ}}}{S}_y(i,j)$ Formula (7)

By ink-covered area dot area percentage summation S _k, S _c, S _m, S _yDivided by the ink-covered area sum of all pixels, get the yellow four look dot area coverage rates of black blue or green product in the ink outlet zone, represent with K, C, M, Y respectively, provide by formula (8):

$\left\{\begin{array}{c}K=S_k/(p\·b)\\ C=S_c/(p\·b)\\ M=S_m/(p\·b)\\ Y=S_y/(p\·b)\end{array}\right.$ Formula (8)

S wherein _k, S _c, S _m, S _yThe dot area sum of representing all sites of corresponding color in each ink-covered area.

4, the method for a kind of definite ink-supplying amount of printing machine according to claim 1 is characterized in that, said maximum and minimum ink-supplying amount value, if minimum ink-supplying amount value is m_Papermin, maximum ink-supplying amount value is m_PaperMax, and the ink-supplying amount minimum of a value of art paper is 1, and the ink-supplying amount maximum is 16; The ink-supplying amount minimum of a value of offset paper is 2, and the ink-supplying amount maximum is 17; The ink-supplying amount minimum of a value of map paper is 3, and the ink-supplying amount maximum is 20.

5, the method for a kind of definite ink-supplying amount of printing machine according to claim 1, it is characterized in that, said definite ink-covered area ink-supplying amount setting value, if the ink-covered area ink-supplying amount is k, c, m, y, its value is calculated by maximum ink-supplying amount value, minimum ink-supplying amount value and ink-covered area dot area coverage rate three, and calculates the black print ink-covered area by following formula and give the China ink value

In like manner, China ink value c is given in the ink-covered area that can calculate green grass or young crops, product, yellow three look versions, m, and y, the value that following formula calculates need convert primary area China ink amount H and fine setting district China ink amount L two parts to, and black, green grass or young crops, product, yellow edition owner of all kinds district is black measures respectively with H _k, H _c, H _m, H _yExpression, fine setting district China ink amount is respectively with L _k, L _c, L _m, L _yExpression is obtained by following formula:

$\left\{\begin{array}{c}{H}_k=\left[k\right]\\ L_k=(k-[k\left]\right)\·20\\ H_c=\left[c\right]\\ L_c=(c-[c\left]\right)\·20\\ H_m=\left[m\right]\\ L_m=(m-[m\left]\right)\·20\\ H_y=\left[y\right]\\ L_y=(y-[y\left]\right)\·20\end{array}\right.$ Formula (10)

。

6, the method for a kind of definite ink-supplying amount of printing machine according to claim 1 is characterized in that, the humiture parameter that said printshop is used: 20 ℃-25 ℃ of temperature, humidity 60%.

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