CN102404491B - Trapping method and trapping system including gradient blocks - Google Patents
Trapping method and trapping system including gradient blocks Download PDFInfo
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- CN102404491B CN102404491B CN201010276630.3A CN201010276630A CN102404491B CN 102404491 B CN102404491 B CN 102404491B CN 201010276630 A CN201010276630 A CN 201010276630A CN 102404491 B CN102404491 B CN 102404491B
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Abstract
The invention discloses a trapping method and a trapping system including gradient blocks, which belong to the technical field of trapping in package printing. An existing trapping method can easily cause gaps between gradient trapping areas and between the gradient trapping areas and non-gradient trapping areas. The trapping method and the trapping system comprise the following procedures: firstly obtaining the shared borders of all the adjacent gradient blocks of an object to be trapped; judging whether each public border is a trapping border; judging the trapping directions of the trapping borders, and if the trapping borders are gradient trapping borders, judging the trapping directions of endpoints of the trapping borders; connecting the adjacent trapping borders according to the trapping directions of the trapping borders and the endpoints of the gradient trapping borders; generating the trapping areas; dividing the trapping areas; and finally filling colors in the divided trapping areas. The trapping method and the trapping system can effectively avoid the gaps and improve printing quality.
Description
Technical field
The present invention relates to a kind of trapping method and system, especially relate to a kind of trapping method that comprises gradual change color lump and system, belong to the trapping technical field in packages printing.
Background technology
In printing process, when multicolor overprint, usually there will be the situation of register trouble.Chromatography refers to the printing of carrying out the in the situation that of front version respective regions hollow out of the same colour (Knockout), so easily there is the situation of register trouble.Due to register trouble, just there will be some tiny leakages white at two adjacent color lump boundaries, very not attractive in appearance.For fear of leaking white generation, need between different target edges, generate some tiny double exposure regions, i.e. area of trap, discovers less than these human eye and leaks in vain.Above-mentioned processing mode is called trapping.
It is white that trapping is called traditionally mending-leakage in printing industry, be called again scalable, be mainly for make up because of the leakage between two adjacent different colours pieces causing of printing register trouble white.In the time that people face printed matter, always sensation is dark close to human eye, and light color is away from human eye.Therefore, trapping object being carried out to trapping while processing, manage not allow the light color under dark expose, and dark color above remain unchanged.Even if there is like this skew of little bit, the ink of double exposure can be covered the mistake of register trouble, and does not cause the shape of object to be distorted, thereby ensures not affect visual effect.
In trapping processing procedure, between area of trap, may there is breach phenomenon, cause trapping result not attractive in appearance.Chinese patent application (publication number: 101610343A, open day: the method and system that 2009.12.23) disclose a kind of automatic trapping, the mode that the method and system connect by trapping border, the breach producing between non-gradual change area of trap can be filled, but between gradual change area of trap, the breach that produces between gradual change area of trap and non-gradual change area of trap is helpless.As shown in Figure 1, arrow indication region is the breach between gradual change area of trap 12 and non-gradual change area of trap 11 and 13.Because gradual change area of trap is all likely different in the trapping direction at the every bit place on trapping border and trap width, therefore it is easy to occur and be not easy repairing also there is no at present good solution with the breach between other non-gradual change area of traps.
Summary of the invention
For the defect existing in prior art, technical problem to be solved by this invention is to provide a kind of trapping method that comprises gradual change color lump and system, the method and system can effectively solve in trapping process between gradual change area of trap, the gap problem that produces between gradual change area of trap and non-gradual change area of trap.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A trapping method that comprises gradual change color lump, comprises the following steps:
(1) scanning treat all color lumps in trapping object, obtain the public boundary of all adjacent color lumps, described in treat that trapping object comprises gradual change color lump;
(2) judge whether each public boundary is trapping border;
(3) judge the trapping direction on trapping border, if trapping border is gradual change trapping border, judge the trapping direction of gradual change trapping boundary end point;
(4) according to the trapping direction of the trapping direction on trapping border and gradual change trapping boundary end point, adjacent trapping border is connected;
(5) generate area of trap; Wherein, for the trapping border having connected, set it as entirety and generate area of trap;
(6) area of trap is cut apart;
(7) area of trap after cutting apart is colored in.
The trapping method that comprises gradual change color lump as above, judges described in step (2) whether public boundary is that adopt with the following method on trapping border:
Judge whether two color lumps under public boundary meet trapping condition, if meet trapping condition, this public boundary is trapping border; If have one to be gradual change color lump in two color lumps under trapping border, this trapping border is gradual change trapping border.
The trapping method that comprises gradual change color lump as above, the trapping direction of gradual change trapping boundary end point described in step (3) obtains by the ink percentage and the brightness that judge end points both sides.
The trapping method that comprises gradual change color lump as above, the process described in step (4), adjacent trapping border being connected is as follows:
If adjacent trapping border is non-gradual change trapping border, and trapping direction is identical, connect this two trapping borders;
If have one in adjacent trapping border for gradual change trapping border, and the trapping direction on non-gradual change trapping border is identical with the trapping direction of end points adjacent with described non-gradual change trapping border in gradual change trapping border, connects this two trapping borders;
If adjacent trapping border is gradual change trapping border, and the trapping direction of two trapping borderline phase neighboring terminal points is identical, connects this two trapping borders.
The trapping method that comprises gradual change color lump as above, in step (6), enters many trapping borders for one and connects the rear area of trap generating, and utilizes the border that is entered color lump to cut apart area of trap.
The trapping method that comprises gradual change color lump as above, wherein, the area of trap generating after connecting for the trapping border of entering one, utilizes the angular bisector of the some place angle that is entered the connection of color lump generation trapping border to cut apart area of trap more.
The trapping method that comprises gradual change color lump as above, wherein, for entering the area of trap generating after one trapping border connects, connects a roundlet of strokes and dots more on trapping border, this roundlet enters two zonules of color lump formation with two, and area is respectively S1, S2; Location cut-off rule is divided into a, two angles of b by the angle at this tie point place, trapping border according to S1/S2=a/b; Utilize this cut-off rule to cut apart area of trap.
A trapping system that comprises gradual change color lump, comprise for scanning treat all color lumps of trapping object, obtain the acquisition device of all adjacent color lump public boundaries, described in treat that trapping object comprises gradual change color lump;
For judging whether each public boundary is the judgment means I on trapping border;
Be used for the judgment means II of the trapping direction that judges trapping border, if trapping border is gradual change trapping border, judgment means II is for judging the trapping direction of gradual change trapping boundary end point;
Be used for according to the trapping direction of the trapping direction on trapping border and gradual change trapping boundary end point, the jockey that adjacent trapping border is connected;
For generating the generating apparatus of area of trap; Wherein, for the trapping border having connected, set it as entirety and generate area of trap;
For the segmenting device that area of trap is cut apart;
And the device that colors in for the area of trap after cutting apart is colored in.
The method of the invention and system, according to the relation between the trapping direction of adjacent gradual change trapping boundary end point, or relation between the trapping direction of gradual change trapping boundary end point and the trapping direction on the non-gradual change trapping border that is adjacent, trapping border is connected, trapping border after connecting is generated to area of trap as a whole, effectively avoid between gradual change area of trap, produce breach between gradual change area of trap and non-gradual change area of trap, thereby greatly improved the quality of printing.
Brief description of the drawings
Fig. 1 is the breach schematic diagram producing between non-gradual change area of trap and gradual change area of trap described in background technology;
Fig. 2 is the trapping system architecture diagram that comprises gradual change color lump described in embodiment;
Fig. 3 is the method flow diagram that adopts system shown in Figure 2 trapping to comprise gradual change color lump;
Fig. 4 is the schematic diagram that example described in embodiment is treated trapping object;
Fig. 5 is the area of trap schematic diagram that example described in embodiment generates;
Fig. 6 is that example described in embodiment is cut apart the schematic diagram after area of trap.
Embodiment
Describe the present invention below in conjunction with embodiment and accompanying drawing.
Fig. 2 shows the trapping system configuration that comprises gradual change color lump described in present embodiment.As shown in Figure 2, this system comprise acquisition device 21, the judgment means I22 being connected with acquisition device 21, the judgment means II23 being connected with judgment means I22, the jockey 24 being connected with judgment means II23, the generating apparatus 25 being connected with jockey 24, the segmenting device 26 being connected with generating apparatus 25 and the device 27 that colors in that is connected with segmenting device 26.
Acquisition device 21, for scanning all color lumps for the treatment of trapping object, obtains the public boundary of all adjacent color lumps.Wherein, treat that trapping object comprises gradual change color lump, the color block that color gradually changes.
Whether judgment means I22 is trapping border for each public boundary that judges all public boundaries that acquisition device 21 obtains.
Judgment means II23 is used for judging the trapping direction on trapping border, if trapping border is gradual change trapping border, and the border that this trapping border is gradual change color lump, judgment means II23 is for judging the trapping direction of gradual change trapping boundary end point.
Jockey 24, for according to the trapping direction of the trapping direction on trapping border and gradual change trapping boundary end point, connects adjacent trapping border.
Generating apparatus 25 is for generating area of trap; Wherein, for the trapping border having connected, set it as entirety and generate area of trap.Area of trap refers to the part that trapping border is extended out or inside contracted.
Segmenting device 26, for area of trap is cut apart, is divided into the area of trap under each trapping border by overall area of trap.
Color in device 27 for the area of trap after cutting apart is colored in.
Fig. 3 shows the method flow that adopts system shown in Figure 2 trapping to comprise gradual change color lump.As shown in Figure 3, the method comprises the following steps:
(1) acquisition device 21 obtains the public boundary of all adjacent color lumps.
The all color lumps in trapping object are treated in scanning, obtain the public boundary of all adjacent color lumps.Wherein, treat to comprise in trapping object gradual change color lump.
To treat shown in Fig. 4 that trapping object is as example.This trapping object comprises a gradual change color lump A and 3 non-gradual change color lump B, C, D.Public boundary between gradual change color lump A and color lump B is border 41, public boundary between color lump B and color lump C is border 42, public boundary between color lump C and color lump D is border 43, public boundary between color lump D and gradual change color lump A is border 44, and the public boundary between color lump C and gradual change color lump A is border 45.
(2) judgment means I22 judges whether each public boundary is trapping border.
Judge whether two color lumps under public boundary meet trapping condition, if meet trapping condition, this public boundary is trapping border.If have one to be gradual change color lump in two color lumps under trapping border, this trapping border is gradual change trapping border.
In present embodiment, whether the color lump that judges public boundary both sides meets trapping condition adopts the method based on ink dot percentage and brightness, the specific implementation process of the method can be referring to Chinese patent application (publication number: 101610343A, open day: the record 2009.12.23), no longer describe in detail herein.
In above-mentioned example, known through judging: trapping border is border 42,43 and 45.Wherein, trapping border 45 is gradual change trapping border.
(3) judgment means II23 judges the trapping direction on trapping border, if trapping border is gradual change trapping border, judges the trapping direction of gradual change trapping boundary end point.
The determination methods of trapping direction also can, referring to the above-mentioned Patent Application Publication of quoting as proof, no longer describe in detail herein.For the trapping direction of gradual change trapping boundary end point, can obtain by the ink percentage and the brightness that judge end points both sides.
In above-mentioned example, the trapping direction on trapping border 42 is to carry out trapping by color lump B to color lump C, the trapping direction on trapping border 43 is to carry out trapping by color lump C to color lump D, the trapping direction of trapping border 45 left end points 46 is to carry out trapping by gradual change color lump A to color lump C, the trapping direction of right endpoint 47 is to carry out trapping by color lump C to gradual change color lump A, as the arrow direction in Fig. 4.
(4) jockey 24, according to the trapping direction of the trapping direction on trapping border and gradual change trapping boundary end point, connects adjacent trapping border.
If adjacent trapping border is non-gradual change trapping border, and trapping direction is identical, connect this two trapping borders.
If have one in adjacent trapping border for gradual change trapping border, and the trapping direction on non-gradual change trapping border is identical with the trapping direction of end points adjacent with non-gradual change trapping border in gradual change trapping border, connects this two trapping borders.
If adjacent trapping border is gradual change trapping border, and the trapping direction of two trapping borderline phase neighboring terminal points is identical, connects this two trapping borders.
In above-mentioned example, because the left end point 46 on the trapping border 42 between color lump B and color lump C and gradual change trapping border 45 is adjacent and trapping direction is identical, therefore trapping border 42 is connected with gradual change trapping border 45.Because the right endpoint 47 on the trapping border 43 between color lump D and color lump C and gradual change trapping border 45 is adjacent and trapping direction is identical, therefore trapping border 43 is connected with gradual change trapping border 45.Finally obtain the trapping border being formed by trapping border 42,43,45 after connecting.
(5) generating apparatus 25 generates area of trap; Wherein, for the trapping border having connected, set it as entirety and generate area of trap.
In above-mentioned example, as shown in Figure 5, by the trapping border after connecting as a whole, obtain area of trap 51 according to the trapping Directional Extension on each trapping border simultaneously.The generation method of area of trap can, referring to the above-mentioned Patent Application Publication of quoting as proof, no longer describe in detail herein.
(6) segmenting device 26 is cut apart area of trap.
Enter many trapping borders for one and connect the rear area of trap generating, utilize the border that is entered color lump to cut apart area of trap.Described one enter many trapping borders connect refer to same color lump to its around multiple different color lumps do trapping, these trapping borders are coupled together, be called into multi-link.
In above-mentioned example, color lump C carries out trapping to gradual change color lump A and color lump D, utilizes the border 44 that is entered color lump to cut apart area of trap, as shown in Figure 6.
The area of trap generating after connecting for the trapping border of entering one, has following two kinds of modes to cut apart area of trap more.Described enter one trapping border connect and refer to that multiple different color lumps do trapping to same color lump, these trapping borders are coupled together, be called and enter a connection more.
1) angular bisectrix method: utilize the angular bisector of the some place angle that is entered the connection of color lump generation trapping border to cut apart area of trap.
In above-mentioned example, color lump B and gradual change color lump A all carry out trapping to color lump C, utilize the angular bisector of the intersection point 46 place angles on trapping border 42 and 45 to cut apart area of trap, as shown in Figure 6.
2) Area Ratio Method: connect a roundlet of strokes and dots on trapping border, this roundlet enters two zonules of color lump formation with two, and area is respectively S1, S2; Location cut-off rule is divided into a, two angles of b by the angle at this tie point place, trapping border according to S1/S2=a/b; Utilize this cut-off rule to cut apart area of trap.
Fig. 6 shows three area of traps cutting apart rear generation in above-mentioned example, is respectively area of trap 61, area of trap 62, area of trap 63 and area of trap 64.As seen from Figure 6, between area of trap 61 and area of trap 62, all there is not gap problem between area of trap 63 and area of trap 64.
(7) device 27 that colors in colors in to the area of trap after cutting apart, and the concrete method of coloring in can, referring to the above-mentioned Patent Application Publication of quoting as proof, no longer describe in detail herein.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technology thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (7)
1. a trapping method that comprises gradual change color lump, comprises the following steps:
(1) all color lumps in trapping object are treated in scanning, obtain the public boundary of all adjacent color lumps, described in treat to comprise in trapping object gradual change color lump;
(2) judge whether each public boundary is trapping border;
(3) judge the trapping direction on trapping border, if trapping border is gradual change trapping border, judge the trapping direction of gradual change trapping boundary end point;
(4) according to the trapping direction of the trapping direction on trapping border and gradual change trapping boundary end point, adjacent trapping border is connected; The process that adjacent trapping border is connected is as follows:
If adjacent trapping border is non-gradual change trapping border, and trapping direction is identical, connect this two trapping borders;
If have one in adjacent trapping border for gradual change trapping border, and the trapping direction on non-gradual change trapping border is identical with the trapping direction of end points, connect this two trapping borders, described end points is the gradual change trapping border end points adjacent with described non-gradual change trapping border;
If adjacent trapping border is gradual change trapping border, and the trapping direction of two trapping borderline phase neighboring terminal points is identical, connects this two trapping borders;
(5) generate area of trap; Wherein, for the trapping border having connected, set it as entirety and generate area of trap;
(6) area of trap is cut apart;
(7) area of trap after cutting apart is colored in.
2. the trapping method that comprises gradual change color lump as claimed in claim 1, is characterized in that: described in step (2), judge whether public boundary is that adopt with the following method on trapping border:
Judge whether two color lumps under public boundary meet trapping condition, if meet trapping condition, this public boundary is trapping border; If have one to be gradual change color lump in two color lumps under trapping border, this trapping border is gradual change trapping border.
3. the trapping method that comprises gradual change color lump as claimed in claim 1, is characterized in that: the trapping direction of gradual change trapping boundary end point described in step (3) obtains by the ink percentage and the brightness that judge end points both sides.
4. the trapping method that comprises gradual change color lump as described in one of claims 1 to 3, is characterized in that: in step (6), enter many trapping borders connect the rear area of trap generating for one, utilize the border that is entered color lump to cut apart area of trap.
5. the trapping method that comprises gradual change color lump as claimed in claim 4, it is characterized in that: the area of trap generating after connecting for the trapping border of entering one, utilizes the angular bisector of the some place angle that is entered the connection of color lump generation trapping border to cut apart area of trap more.
6. the trapping method that comprises gradual change color lump as claimed in claim 4, it is characterized in that: the area of trap generating after connecting for the trapping border of entering one more, connect a roundlet of strokes and dots on trapping border, this roundlet enters two zonules of color lump formation with two, and area is respectively S1, S2; Location cut-off rule is divided into a, two angles of b by the angle at this tie point place, trapping border according to S1/S2=a/b; Utilize this cut-off rule to cut apart area of trap.
7. comprise a trapping system for gradual change color lump, comprise for scanning treat all color lumps of trapping object, obtain the acquisition device (11) of all adjacent color lump public boundaries, described in treat that trapping object comprises gradual change color lump;
For judging whether each public boundary is the judgment means I(12 on trapping border);
Be used for the judgment means II(13 of the trapping direction that judges trapping border), if trapping border is gradual change trapping border, judgment means II(13) for judging the trapping direction of gradual change trapping boundary end point;
Be used for according to the trapping direction of the trapping direction on trapping border and gradual change trapping boundary end point the jockey (14) that adjacent trapping border is connected; The process that jockey (14) connects adjacent trapping border is as follows:
If adjacent trapping border is non-gradual change trapping border, and trapping direction is identical, connect this two trapping borders;
If have one in adjacent trapping border for gradual change trapping border, and the trapping direction on non-gradual change trapping border is identical with the trapping direction of end points, connect this two trapping borders, described end points is the gradual change trapping border end points adjacent with described non-gradual change trapping border;
If adjacent trapping border is gradual change trapping border, and the trapping direction of two trapping borderline phase neighboring terminal points is identical, connects this two trapping borders;
For generating the generating apparatus (15) of area of trap; Wherein, for the trapping border having connected, set it as entirety and generate area of trap;
For the segmenting device (16) that area of trap is cut apart;
And the device that colors in (17) for the area of trap after cutting apart is colored in.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010276630.3A CN102404491B (en) | 2010-09-08 | 2010-09-08 | Trapping method and trapping system including gradient blocks |
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| CN201010276630.3A CN102404491B (en) | 2010-09-08 | 2010-09-08 | Trapping method and trapping system including gradient blocks |
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| CN102404491B true CN102404491B (en) | 2014-08-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801898A (en) * | 2012-06-13 | 2012-11-28 | 方正国际软件有限公司 | Interactive trapping method |
| US10456661B2 (en) * | 2016-07-19 | 2019-10-29 | Hydragraphix Llc | Enhanced security and printability of instant ticket scratch-off-coatings via stochastic overprints |
| CN109816635B (en) * | 2018-12-31 | 2023-08-22 | 方正株式(武汉)科技开发有限公司 | Trap area optimization method and device and storage medium |
| 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 |
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| US5802970A (en) * | 1995-03-01 | 1998-09-08 | Tani Electronics Industry Co., Ltd | Screen printing apparatus |
| CN101610343A (en) * | 2008-06-16 | 2009-12-23 | 北京大学 | A kind of method and system of automatic trapping |
| CN101686309A (en) * | 2008-09-28 | 2010-03-31 | 北大方正集团有限公司 | Method and device of generating trapping by image path |
| CN101729744A (en) * | 2008-10-24 | 2010-06-09 | 方正国际软件(北京)有限公司 | Method and system of gradual changing color fading and trapping |
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2010
- 2010-09-08 CN CN201010276630.3A patent/CN102404491B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5802970A (en) * | 1995-03-01 | 1998-09-08 | Tani Electronics Industry Co., Ltd | Screen printing apparatus |
| CN101610343A (en) * | 2008-06-16 | 2009-12-23 | 北京大学 | A kind of method and system of automatic trapping |
| CN101686309A (en) * | 2008-09-28 | 2010-03-31 | 北大方正集团有限公司 | Method and device of generating trapping by image path |
| CN101729744A (en) * | 2008-10-24 | 2010-06-09 | 方正国际软件(北京)有限公司 | Method and system of gradual changing color fading and trapping |
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