CN102088540B - Trapping method and device - Google Patents
Trapping method and device Download PDFInfo
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- CN102088540B CN102088540B CN 200910242016 CN200910242016A CN102088540B CN 102088540 B CN102088540 B CN 102088540B CN 200910242016 CN200910242016 CN 200910242016 CN 200910242016 A CN200910242016 A CN 200910242016A CN 102088540 B CN102088540 B CN 102088540B
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Abstract
The invention discloses a trapping method and device, which belong to the technical field of package printing. The method comprises the following steps of: firstly, determining trapping directions of public boundaries which meet a trapping processing condition; secondly, sequentially judging each non-trapped public boundary, and determining that a public boundary e is trapped in the same trapping direction as a boundary e1 if oil ink of a color lump P1 on one side of the public boundary e comprises oil ink of a color lump P2 on the other side of the public boundary e and oil ink of an adjacent color lump P3 on the other side of the adjacent boundary e1 on the P2 on the public boundary e is oil ink obtained by subtracting the lump P2 from the color lump P1; and lastly, performing trapping processing in the updated trapping direction. By applying the method and the device, the problem of breaches on trapping regions of adjacent color lumps comprising the same type of oil ink during trapping can be solved, and the appearances of the trapping regions are enhanced.
Description
Technical field
The present invention relates to technical field of packaging and printing, relate in particular to a kind of trapping method and device.
Background technology
Trapping, in printing industry also custom to be called mending-leakage white, be called again scalablely, mainly be to cause two leakages between the adjacent different colours white in order to remedy because of the printing register trouble.When people when the printed matter, always sensation is dark close to human eye, therefore light color, carrying out trapping when processing to original copy away from human eye, always manage not allow the light color under dark expose, and top dark color remains unchanged.Even the skew of little bit occurs like this, the printing ink of double exposure can be covered the mistake of register trouble, and does not cause the shape of object to be distorted, thereby guarantees not affect visual effect.
Therefore the double exposure object does not need to carry out trapping owing to not existing register trouble to leak white situation.When making before the reality seal, personnel can be arranged to double exposure with less literal and other less object before the seal, and perhaps less literal and other less object contain the printing ink of its adjacent color lump.When using automatic trapping software to carry out trapping for above-mentioned situation, can there be a large amount of breach in area of trap, and is inconsistent with the original manual trapping effect of user, and the aesthetic property of impact design original text.Yet because the trap width setting is wider, the aesthetic property of area of trap is even more important for the gravure user.
Summary of the invention
For existing problem in the prior art, the purpose of this invention is to provide a kind of trapping method and device, the method and device can solve to comprise with the adjacent color lump of color ink and produce the problem of breach at the area of trap that carries out causing when trapping is processed, generate level and smooth area of trap, improve the aesthetic property of area of trap.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is that a kind of trapping method may further comprise the steps:
(1) the trapping object is converted into simple color lump, by scanning all color lumps, obtains the public boundary of adjacent color lump;
(2) judge that successively whether each public boundary satisfies the condition that trapping is processed of carrying out, and then determines the trapping direction if satisfy;
(3) search the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary;
(4) according to the trapping direction after upgrading, carry out trapping and process.
Further, in the step (1), the trapping object is converted into simple color lump, concrete step comprises:
A. the trapping object is processed and obtained the simple object that plain net, gradual change and image form;
Dither pattern and the transparence information that b. will act on the simple object convert the double exposure effect to;
C. the result among the step b is merged and cut apart computing, obtain simple color lump.
Further, in the step (2), the determining of described trapping direction, specifically comprise: by extracting the brightness of two the adjacent color lumps in trapping border, determine that the high color lump of brightness carries out trapping to the low color lump of brightness, i.e. the high color lump of brightness is for entering color lump, and the low color lump of brightness is for being entered color lump.
Further, in the step (3), the described adjacent color lump that comprises with color ink of searching, the trapping direction of renewal public boundary specifically comprises:
Judge that successively public boundary of trapping does not occur for each, if the printing ink of public boundary e one side color lump P1 comprises the printing ink of opposite side color lump P2, and the printing ink of the adjacent color lump P3 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink that the printing ink of color lump P1 deducts color lump P2, determine that then trapping occurs public boundary e, the trapping direction is the trapping direction of border e1, and it is that the printing ink that trapping is filled occurs border e1 that area of trap is filled printing ink;
If in the public boundary that trapping does not occur that determine to upgrade, exist two public boundaries to contain two same endpoints, then only upgrade in two public boundaries the trapping direction than minor face circle.
Further, described according to the trapping direction after upgrading in the step (4), carry out trapping and process, the printing ink that its area of trap is filled is the printing ink that enters color lump.
Further, in the step (4), according to the trapping direction after upgrading, carry out trapping and process, specifically comprise:
A. judge that area of trap is entered color lump with quilt and whether contains certain identical printing ink, and whether the printing ink dot percentage of area of trap is less than the printing ink dot percentage that is entered the zone;
If b. above-mentioned judged result is and is among a, the identical printing ink of this kind of area of trap is namely removed in the processing of then losing lustre.
Further, in the step (2), determine the trapping direction after, the public boundary that satisfies the trapping treatment conditions is carried out first trapping processes; In the step (4), again carry out trapping according to the trapping direction after upgrading and process.
For realizing said method, the invention provides a kind of trapping device, it comprises with lower module:
Trapping object conversion module: be used for the trapping object is converted into simple color lump, and by all color lumps of scanning, obtain the public boundary of adjacent color lump;
The border trapping is processed judge module: be used for judging whether each public boundary satisfies the condition that trapping is processed of carrying out, and then determines the trapping direction if satisfy;
Trapping direction update module: be used for searching the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary;
Trapping processing module: be used for carrying out trapping and processing according to the trapping direction after upgrading.
Further, the workflow of described trapping direction update module is: judge that successively public boundary of trapping does not occur for each, if the printing ink of public boundary e one side color lump P1 comprises the printing ink of opposite side color lump P2, and the printing ink of the adjacent color lump P3 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink that the printing ink of color lump P1 deducts color lump P2, determine that then trapping occurs public boundary e, the trapping direction is the trapping direction of border e1, and it is that the printing ink that trapping is filled occurs border e1 that area of trap is filled printing ink; If in the public boundary that trapping does not occur that determine to upgrade, exist two public boundaries to contain two same endpoints, then only upgrade in two public boundaries the trapping direction than minor face circle.
Further, also be provided with the processing submodule of losing lustre in the described trapping processing module, be used for judging that area of trap is entered color lump with quilt and whether contains identical printing ink, and whether the printing ink dot percentage of area of trap is less than the printing ink dot percentage that is entered the zone, if above-mentioned judged result is be, then to the area of trap processing of losing lustre, namely remove the identical printing ink of this kind of area of trap.
Effect of the present invention is: the inventive method and device can solve the adjacent color lump that comprises printing ink of the same race, cause the problem of area of trap generation breach when carrying out trapping, improve the aesthetics of area of trap.
Description of drawings
Fig. 1 is the method flow diagram of a kind of trapping method of the embodiment of the invention;
Fig. 2 is the color lump schematic diagram for the treatment of in the embodiment of the invention that trapping is processed;
Fig. 3 utilizes prior art that color lump shown in Figure 2 is carried out schematic diagram after trapping is processed;
Fig. 4 carries out schematic diagram after trapping is processed to color lump shown in Figure 2 in the embodiment of the invention;
Fig. 5 is the system construction drawing of a kind of trapping device in the embodiment of the invention.
Embodiment
Below in conjunction with Figure of description and embodiment, the present invention is further described in detail.
As shown in Figure 5, a kind of trapping device comprises with lower module:
Trapping object conversion module 51: be used for the trapping object is converted into simple color lump, and by all color lumps of scanning, obtain the public boundary of adjacent color lump;
The border trapping is processed judge module 52: be used for judging whether each public boundary satisfies the condition that trapping is processed of carrying out, and then determines the trapping direction if satisfy;
Trapping direction update module 53: be used for searching the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary;
Trapping processing module 54: be used for carrying out trapping and processing according to the trapping direction after upgrading.
In the present embodiment, described trapping direction renewal mould certainly 53 workflow is: judge that successively public boundary of trapping does not occur for each, if the printing ink of public boundary e one side color lump P1 comprises the printing ink of opposite side color lump P2, and the printing ink of the adjacent color lump P3 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink that the printing ink of color lump P1 deducts color lump P2, determine that then trapping occurs public boundary e, the trapping direction is the trapping direction of border e1, and it is that the printing ink that trapping is filled occurs border e1 that area of trap is filled printing ink.
Also be provided with the processing submodule of losing lustre in the described trapping processing module 54, be used for judging that area of trap is entered color lump with quilt and whether contains identical printing ink, and whether the printing ink dot percentage of area of trap is less than the printing ink dot percentage that is entered the zone, if above-mentioned judged result is be, then to the area of trap processing of losing lustre, namely remove the identical printing ink of this kind of area of trap.
The present invention adopts following embodiment to be illustrated, its flow chart as shown in Figure 1, a kind of method of trapping method specifically may further comprise the steps:
Step S11: the trapping object is converted into simple color lump, by scanning all color lumps, obtains the public boundary of adjacent color lump;
The trapping object is converted into simple color lump, specifically comprises:
A. the trapping parameter that arranges according to the user, plain net, gradual change, image, pattern, grid, literal, symbol, transparent effect, shearing are covered plate, opaque illiteracy plate, multilayer object, individual layer object, blending objects, special-effect process etc. and to obtain simple object, be i.e. the simple object that forms of plain net, gradual change and image;
These processing all belong to known technology, comprise that retouching the limit separates with filling, and the separation pattern is simple object, embeds external object, and literal is broken up and is simple path etc.;
Dither pattern and the transparence information that b. will act on the simple object convert the double exposure effect to;
C. the result with step b merges and cuts apart computing, obtains simple color lump.
Pass through above-mentioned steps, the simple color lump that obtains is adjacent, non-conterminous position relationship, as shown in Figure 2, form the adjacent form of simple color lump behind color lump, wherein color lump P1 comprises printing ink carmetta M and cyan C, color lump P2 comprise printing ink carmetta M and color lump P3 comprises printing ink cyan C.
Need in the present embodiment color lump P1, P2 and P3 are carried out the trapping processing, scan all color lumps, obtain public boundary e, color lump P2 and the public boundary e1 of color lump P3 and the public boundary e3 of e2 and color lump P1 and color lump P3 of color lump P1 and color lump P2.
Step S12: judge successively whether each public boundary satisfies the condition that trapping is processed of carrying out, and then determines the trapping direction if satisfy, entering color lump and being entered color lump of trapping namely occurs;
The definite of trapping direction specifically comprises in the embodiment of the invention: described trapping occurrence condition is decided by the printing ink dot percentage; Its trapping direction is by the printing ink brightness decision.If two color lumps of public boundary both sides do not contain identical printing ink, trapping then occurs; If determine trapping occurs, then ink composition is transformed into the LAB space and obtains its brightness value, the color lump that brightness value is large carries out trapping to the little color lump of brightness value, and what wherein brightness value was large is to enter color lump, and what brightness value was little is entered color lump.
In the embodiment of the invention, through judging the public boundary e1 and the e2 that determine between color lump P2 and the color lump P3 trapping occurs, the trapping direction is that color lump P3 carries out trapping to color lump P2; Public boundary e is because the color lump P1 of boundaries on either side contains identical printing ink M with P2, and public boundary e3 is because the color lump P1 of boundaries on either side contains identical printing ink C with P3, so trapping does not all occur for public boundary e and e3.
Step S13: search the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary:
In the present embodiment, judge that successively public boundary of trapping does not occur for each, the printing ink M that comprises opposite side color lump P2 for the printing ink of public boundary e one side color lump P1, and the printing ink of the adjacent color lump P3 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink C that the printing ink of color lump P1 deducts color lump P2, determines that tentatively trapping occurs public boundary e;
Equally, the printing ink C that comprises opposite side color lump P3 for the printing ink of public boundary e3 one side color lump P1, and the printing ink of the adjacent color lump P2 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink M that the printing ink of color lump P1 deducts color lump P2, determines that tentatively trapping occurs public boundary e3;
In determining the public boundary that trapping does not occur that upgrades, exist two public boundary e and e3 to contain two same endpoints, then only upgrade in two public boundaries the trapping direction than minor face circle e, therefore upgrading public boundary e trapping direction is the trapping direction of border e1, it is that the printing ink that trapping is filled occurs border e1 that area of trap is filled printing ink, be that color lump P1 carries out trapping to color lump P2, the printing ink that area of trap is filled is printing ink C, and trapping does not occur public boundary e3.
Step S14: according to the trapping direction after upgrading, carry out trapping and process.
According to the trapping direction after upgrading, carry out trapping and process in the embodiment of the invention, the printing ink that its area of trap is filled is the printing ink that enters color lump.If area of trap with contained certain identical printing ink by being entered color lump, and the printing ink dot percentage of area of trap need to lose lustre less than the printing ink dot percentage that is entered the zone, namely removes the identical printing ink of this kind of area of trap.
Fig. 3 utilizes prior art to carry out the schematic diagram that obtains after trapping is processed, and then area of trap will produce breach at public boundary e place, affect the area of trap aesthetics.As shown in Figure 4, adopt the method for the invention can solve the adjacent color lump that comprises printing ink of the same race, when carrying out trapping, cause area of trap to produce the problem of breach, generate level and smooth area of trap, improve the aesthetic property of area of trap.
In the present embodiment, can also set-up procedure S12 and step S14, namely in step S12, determine the trapping direction after, the public boundary that satisfies the trapping treatment conditions is carried out first trapping processes; Search again the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary; Then in step S14, carry out the secondary trapping according to the trapping direction after upgrading and process.Printing technology personnel's later stage can utilize said method to carry out the area of trap correction, improves the quality of printed matter.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (5)
1. a trapping method comprises the steps:
(1) the trapping object is converted into simple color lump, by scanning all color lumps, obtains the public boundary of adjacent color lump;
(2) judge that successively whether each public boundary satisfies the condition that trapping is processed of carrying out, and then determines the trapping direction if satisfy; The trapping occurrence condition is decided by the printing ink dot percentage, and two color lumps of public boundary both sides do not contain identical printing ink, and trapping then occurs; If determine trapping occurs, then ink composition is transformed into the LAB space and obtains its brightness value, the color lump that brightness value is large carries out trapping to the little color lump of brightness value;
(3) search the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary; Concrete mode is:
The public boundary of piece P1 and color lump P2 of filling in colors on a sketch is public boundary e, and the public boundary of color lump P2 and color lump P3 is public boundary e1, and the public boundary of color lump P1 and color lump P3 is public boundary e3;
The printing ink M that comprises opposite side color lump P2 for the printing ink of public boundary e one side color lump P1, and the printing ink of the adjacent color lump P3 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink C that the printing ink of color lump P1 deducts color lump P2, determines that tentatively trapping occurs public boundary e;
In determining the public boundary that trapping does not occur that upgrades, exist two public boundary e and e3 to contain two identical end points, then only upgrade in two public boundaries the trapping direction than minor face circle e, upgrading public boundary e trapping direction is the trapping direction of border e1, it is that the printing ink that trapping is filled occurs border e1 that area of trap is filled printing ink, be that color lump P1 carries out trapping to color lump P2, the printing ink that area of trap is filled is printing ink C, and trapping does not occur public boundary e3;
(4) according to the trapping direction after upgrading, carry out trapping and process; Concrete mode is: the printing ink that area of trap is filled is the printing ink that enters color lump, if being entered color lump with quilt, area of trap contains certain identical printing ink, and the printing ink dot percentage of area of trap is less than the printing ink dot percentage that is entered the zone, need to lose lustre, namely remove this identical printing ink of area of trap.
2. a kind of trapping method as claimed in claim 1, it is characterized in that: in the step (1), the step that the trapping object is converted into simple color lump specifically comprises:
A. the trapping object is processed and obtained the simple object that plain net, gradual change and image form;
Dither pattern and the transparence information that b. will act on the simple object convert the double exposure effect to;
C. the result who obtains among the step b is merged and cut apart computing, obtain simple color lump.
3. a kind of trapping method as claimed in claim 1 is characterized in that: in the step (2), determining of described trapping direction specifically comprises:
By extracting the brightness of two the adjacent color lumps in trapping border, determine that the high color lump of brightness carries out trapping to the low color lump of brightness, i.e. the high color lump of brightness is for entering color lump, and the low color lump of brightness is entered color lump for quilt.
4. a kind of trapping method as claimed in claim 1 is characterized in that: in the step (2), determine the trapping direction after, the public boundary that satisfies the trapping treatment conditions is carried out first trapping processes; In the step (4), again carry out trapping according to the trapping direction after upgrading and process.
5. trapping device, it comprises with lower module:
Trapping object conversion module: be used for the trapping object is converted into simple color lump, and by all color lumps of scanning, obtain the public boundary of adjacent color lump;
The border trapping is processed judge module: be used for judging whether each public boundary satisfies the condition that trapping is processed of carrying out, and then determines the trapping direction if satisfy; The trapping occurrence condition is decided by the printing ink dot percentage, and two color lumps of public boundary both sides do not contain identical printing ink, and trapping then occurs; If determine trapping occurs, then ink composition is transformed into the LAB space and obtains its brightness value, the color lump that brightness value is large carries out trapping to the little color lump of brightness value;
Trapping direction update module: be used for searching the adjacent color lump that comprises with color ink, upgrade the trapping direction of public boundary; The workflow of trapping direction update module is:
The public boundary of piece P1 and color lump P2 of filling in colors on a sketch is public boundary e, and the public boundary of color lump P2 and color lump P3 is public boundary e1, and the public boundary of color lump P1 and color lump P3 is public boundary e3;
The printing ink M that comprises opposite side color lump P2 for the printing ink of public boundary e one side color lump P1, and the printing ink of the adjacent color lump P3 of opposite side of public boundary e adjacent boundary e1 on color lump P2 is the printing ink C that the printing ink of color lump P1 deducts color lump P2, determines that tentatively trapping occurs public boundary e;
In determining the public boundary that trapping does not occur that upgrades, exist two public boundary e and e3 to contain two identical end points, then only upgrade in two public boundaries the trapping direction than minor face circle e, upgrading public boundary e trapping direction is the trapping direction of border e1, it is that the printing ink that trapping is filled occurs border e1 that area of trap is filled printing ink, be that color lump P1 carries out trapping to color lump P2, the printing ink that area of trap is filled is printing ink C, and trapping does not occur public boundary e3; The trapping processing module: be used for carrying out trapping and processing according to the trapping direction after upgrading, the printing ink that area of trap is filled is the printing ink that enters color lump; Also be provided with the processing submodule of losing lustre in the trapping processing module, be used for judging that area of trap is entered color lump with quilt and whether contains identical printing ink, and whether the printing ink dot percentage of area of trap is less than the printing ink dot percentage that is entered the zone, if above-mentioned judged result is be, then to the area of trap processing of losing lustre, namely remove this identical printing ink of area of trap.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910242016 CN102088540B (en) | 2009-12-02 | 2009-12-02 | Trapping method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910242016 CN102088540B (en) | 2009-12-02 | 2009-12-02 | Trapping method and device |
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| CN102088540A CN102088540A (en) | 2011-06-08 |
| CN102088540B true CN102088540B (en) | 2013-03-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102285264B (en) * | 2011-07-14 | 2013-10-23 | 广东金玉兰包装机械有限公司 | Process for forming local laser patterns by accurately positioning |
| CN102547060B (en) * | 2011-12-21 | 2014-11-05 | 方正国际软件有限公司 | Image trapping method and system |
| CN103051828B (en) * | 2012-12-26 | 2015-04-29 | 方正国际软件有限公司 | Method and system for quickly modifying trapping direction |
| CN111277723B (en) * | 2020-01-09 | 2022-03-15 | 方正株式(武汉)科技开发有限公司 | Optimized processing method and device for trapping area |
| CN112967250B (en) * | 2021-03-03 | 2023-02-28 | 方正株式(武汉)科技开发有限公司 | Trapping area optimization method and device based on non-adjacent color blocks |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1624415A2 (en) * | 2004-08-06 | 2006-02-08 | Canon Kabushiki Kaisha | Image processing apparatus and its method |
| CN101383891A (en) * | 2008-10-17 | 2009-03-11 | 北大方正集团有限公司 | Trapping generating method and device for printed document |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1624415A2 (en) * | 2004-08-06 | 2006-02-08 | Canon Kabushiki Kaisha | Image processing apparatus and its method |
| CN101383891A (en) * | 2008-10-17 | 2009-03-11 | 北大方正集团有限公司 | Trapping generating method and device for printed document |
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Assignee: Founder International Co., Ltd. Assignor: Peking University | Founder International Software (Beijing) Co., Ltd Contract record no.: 2010110000047 Denomination of invention: Trapping method and device License type: Common License Open date: 20110608 Record date: 20100506 |
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