CN111459423B - Method for determining optimal borrowing position of printing plate combination by using pixel collision method - Google Patents
Method for determining optimal borrowing position of printing plate combination by using pixel collision method Download PDFInfo
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Classifications
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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
Abstract
The invention discloses a method for determining an optimal borrowing position of a printing plate combining by using a pixel collision method, which is characterized in that in the printing plate combining process, the optimal borrowing position is found by using the pixel collision method from the shape and the size of a plate combining file of each element to typeset, and the method has the following beneficial effects: 1. the method for determining the optimal borrowing position of the printing plate combining by using the pixel collision method is designed, in the whole plate combining optimization process, the digital technology and the programming technology are utilized, before the pixel collision plate combining, the maximum borrowing (four-direction searching) of each row of plate combining files is determined, and the file plate combining occupation domain value is estimated in advance; 2. and respectively colliding the four directions of each file according to a certain angle rotation, such as 90-degree rotation angle, by utilizing a pixel collision process, and respectively dislocating the second typesetting file in the horizontal direction and the vertical direction until the optimal dislocating position of the combined version of the two files is found and ensured.
Description
Technical Field
The invention belongs to the technical field of printing typesetting processes, and particularly relates to a method for determining an optimal borrowing position of a printing plate by using a pixel collision method.
Background
As a more emerging print job mode, a plate combining factory can stand up throughout the world and rise rapidly, and in the internet age, plate combining printing has been given new meaning. The Internet innovation is taken as an access point to achieve great results, so that the Internet innovation becomes a target innovation point for Internet application in the printing industry. For example, the high efficiency, the improvement of the software technology and the internet technology of the combined printing and the improvement of the technology bring about the high efficiency which is difficult to compare and the cost advantage brought by the efficiency leap, so that the combined printing is naturally provided with the characteristics which are more suitable for the internet, and is rapidly developed, the combined printing probably looks not beautiful, the problems are presented, along with various disputes such as low price competition, poor quality, unreasonable typesetting and the like, the existing typesetting mode is more to realize the occupation area of each typesetting file from the inside, then the combined printing is sequentially arranged, and the shape of each combined printing file is not considered at all, so that a lot of space waste is generated in the typesetting process, the typesetting effect is not good, and the optimal borrowing position method for printing is designed by using a pixel collision method.
Disclosure of Invention
In view of the above problems, the present invention is directed to a method for determining an optimal borrowing position of a printing plate by using a pixel collision method.
The technical scheme adopted for solving the technical problems is as follows: in the printing plate combining process, starting from the shape and the size of the combined plate file of each element, finding out the optimal borrowing position by using a pixel collision method for typesetting, and determining the optimal borrowing position of the printing plate combining by using the pixel collision method as follows:
step one, digitizing a file matrix: newly creating a canvas, converting a PDF format combined file into a PNG format file according to a ratio of 1:1 to take the value of a Matrix of pixels, digitizing the file, defining a pixel Matrix as an m multiplied by n Matrix, wherein Matrix (i, j) represents the ith row of the taken Matrix a, data of the jth column, matrix (j) represents the jth column of data, and Matrix (i,) represents the ith row of data;
step two, binarizing the file image: performing image binarization on the PNG format file, namely, representing by 0 and 1, representing by 0 in a blank area, namely, representing by 0 in a value area, representing by 1 in a content area, namely, representing by 1 in a value area, and obtaining the file outline; (assuming that the pixel color value is β, the pixel color threshold α is 0, if β - α=0, the pixel is determined as a blank area, the pixel is represented by 0, if β - α > 0, the pixel is determined as a content area, and the pixel is represented by 1);
judging the maximum borrowing position of the file: taking values from four directions of the file according to an image binarization matrix respectively, if the values are 0, taking the values until the values are 1, storing each row of values as a borrow Array-a, calculating the number m of each Array value, taking the maximum borrow J-max in the direction as the borrow corresponding to the maximum m value, taking the maximum borrow J-max in other directions by the same method, and comparing and determining the maximum borrow J-max of the file; each edition combining file determines the maximum borrowing position by the method;
step four, calculating the maximum borrowing value: the borrow value Jvi =the number mi of the corresponding borrow array, and the maximum borrow value Jv-max is the number of the corresponding maximum borrow array;
step five, pixel collision:
1) Newly creating a canvas, placing files with the largest expansion area, if the expansion areas of a plurality of files are the same, randomly selecting one of the files as the file with the largest area, placing the largest borrow in a horizontal direction or a downward vertical direction, then placing a second combined file in the horizontal direction of the first typesetting file, and aligning the top end of the second typesetting file in the horizontal direction with the top end of the first typesetting file; the Matrix value of the rightmost row of the maximum borrow of the first typesetting file is Matrix-a (n,), n=the width of the first typesetting file, the Matrix value of the leftmost row of the maximum borrow of the second typesetting file is Matrix-b (i,), the second typesetting file is horizontally shifted to the left by 1 pixel, namely, the shift value m=1, then the Matrix-b (i-m,) and the Matrix-a (n,) of the shift i are taken, the bitwise AND computation is carried out, if the Matrix-b (i-m,) & Matrix-a (n,) =1, pixel collision occurs, and the optimal borrow of the two files in the current direction is found; if not, continuing to horizontally shift according to the shift value m+1, then taking a Matrix value Matrix-b (i- (m+1)) of the shift value m+1' from the opposite direction of the shift value m+1, performing bit-wise AND calculation on Matrix-a (n) and Matrix-b (i- (m+1)), and counting the calculation result, if the result is 1, generating pixel collision; then, respectively colliding the other three directions of the second typesetting file according to the method;
2) Then, the horizontal direction of the second typesetting file is downwards moved by one pixel j-1 compared with the top end of the first typesetting file, circular collision is carried out according to the collision process, the optimal dislocation position of the second typesetting file in four directions of downwards moved 1 pixel is determined until the bottommost end of the second typesetting file matrix is aligned with the bottom end of one file matrix, and the circular operation is finished;
step six, determining the optimal dislocation position: comparing the offset values of the second typesetting file after collision in four directions each time, and determining the maximum collision offset value Jv-max, wherein the maximum borrowing position of the direction of the maximum collision offset value is the optimal dislocation position;
step seven, determining the optimal file optimal borrowing position: if a plurality of files are available, processing is sequentially carried out according to the collision methods from the first step to the sixth step, collision results of optimal borrowing of the plurality of files are compared, and optimal borrowing of the optimal files is determined.
In the original edition combining process, the first typesetting file and the second typesetting file are integrated through an original typesetting mode, wherein the original typesetting mode is to integrate each whole typesetting file into a fixed occupation area, and the fixed occupation areas are connected and combined to form a larger original typesetting occupation area; in the new method plate combining process, the digital technology and the programming technology are utilized, before pixel collision, the maximum borrowing value (four-direction searching) of each row of plate combining files is determined, the reasonable occupied area of each file is ensured, in the pixel collision plate combining process, four directions of every two plate combining files are respectively collided according to a certain angle rotation, the pixel collision plate combining is carried out, such as 90-degree rotation angle, the optimal dislocation position of the plate combining is ensured, a new typesetting occupied area is formed through the pixel typesetting collision points of each direction, and compared with the original typesetting occupied area in the original typesetting mode, the new typesetting occupied area has a certain size, and the occupied area is saved.
The beneficial effects of the invention are as follows:
1. the method for determining the optimal borrowing position of the printing plate combining by using the pixel collision method is designed, in the whole plate combining optimization process, the digital technology and the programming technology are utilized, before the pixel collision plate combining, the maximum borrowing (four-direction searching) of each row of plate combining files is determined, and the file plate combining occupation domain value is estimated in advance, namely the maximum borrowing value.
2. And respectively colliding the four directions of each file according to a certain angle rotation, such as 90-degree rotation angle, by utilizing a pixel collision process, and respectively dislocating the second typesetting file in the horizontal direction and the vertical direction until the optimal dislocating position of the combined version of the two files is found and ensured.
Drawings
FIG. 1 is a schematic diagram showing the comparison of the optimization of a method for determining the optimal borrowing position of a printing plate by using a pixel collision method.
FIG. 2 is a schematic diagram of a method for determining an optimal borrowing position of a printing plate by using a pixel collision method.
FIG. 3 is a functional flow chart of a method for determining an optimal borrowing position for a printing imposition using a pixel collision method
Fig. 4 is an optimal borrowing principle diagram of a method for determining an optimal borrowing position of a printing imposition by using a pixel collision method.
1. The method comprises the steps of original typesetting mode, first typesetting file, second typesetting file, original typesetting domain, pixel collision and plate combination, pixel typesetting collision point, new typesetting domain, saving domain, maximum borrowing value, value area of 10.0, value area of 11.1, file outline and optimal dislocation position.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 3, in the method for determining the optimal borrowing position of the printing plate combining by using the pixel collision method, in the printing plate combining process, starting from the shape and the size of the combined plate file of each element, the optimal borrowing position is found by using the pixel collision method to typeset, and the whole process of determining the optimal borrowing position of the printing plate combining by using the pixel collision method is as follows:
step one, digitizing a file matrix: newly creating a canvas, converting a PDF format combined file into a PNG format file according to a ratio of 1:1 to take the value of a Matrix of pixels, digitizing the file, defining a pixel Matrix as an m multiplied by n Matrix, wherein Matrix (i, j) represents the ith row of the taken Matrix a, data of the jth column, matrix (j) represents the jth column of data, and Matrix (i,) represents the ith row of data;
step two, binarizing the file image: the PNG format file is subjected to image binarization, namely 0 and 1, a blank area is represented by 0, namely a 0 value area (10), a content area is represented by 1, namely a 1 value area (11), and a file outline (12) can be obtained;
step three, judging the maximum borrowing of the file, and combining with the figure 4 to show: taking values from four directions of the file according to an image binarization matrix respectively, if the values are 0, taking the values until the values are 1, storing each row of values as a borrow array, calculating the number m of each array, wherein the maximum borrow J-max in the direction is the borrow corresponding to the maximum m value, taking out the maximum borrow in other directions in the same way, and comparing and determining the maximum borrow J-max of the file; each edition combining file determines the maximum borrowing position by the method;
step four, calculating a maximum borrowing value (9): the borrow value Jvi =the number mi of the corresponding borrow array, and the maximum borrow value Jv-max is the number of the corresponding maximum borrow array;
step five, a pixel collision plate combining (5) process is combined with the process shown in fig. 2;
1) creating a canvas, putting a file with the largest expansion area, if the expansion areas of a plurality of files are the same, randomly selecting one file as the file with the largest area, placing the largest borrow in the horizontal direction or the downward vertical direction, and then putting a second typesetting file (3) in the horizontal direction of the first typesetting file (2), wherein the top end of the second typesetting file (3) in the horizontal direction is aligned with the top end of the first typesetting file (2); the Matrix value of the rightmost line of the maximum borrow of the first typesetting file (2) is Matrix-a (n,), n=the width of the first typesetting file (2), the Matrix value of the leftmost line of the maximum borrow of the second typesetting file (3) is Matrix-b (i,), the second typesetting file (3) is horizontally offset to the left by 1 pixel, namely the offset value m=1, then one line of Matrix values Matrix-b (i-m) of the offset i and Matrix-a (n,) are taken for carrying out 'bitwise AND' calculation, if Matrix-b (i-m,) & Matrix-a (n,) =1, pixel collision occurs, and the optimal borrow of the two files in the current direction is found; if not, continuing to horizontally shift according to the shift value m+1, then taking a Matrix value Matrix-b (i- (m+1)) of the shift value m+1' from the opposite direction of the shift value m+1, performing bit-wise AND calculation on Matrix-a (n) and Matrix-b (i- (m+1)), and counting the calculation result, if the result is 1, generating pixel collision; then, collision is carried out on the other three directions of the second typesetting file (3) according to the method;
2) Then the second typesetting file (3) is downwards moved by one pixel j-1 in the horizontal direction than the top end of the first typesetting file (2), circular collision is carried out according to the collision method, the optimal dislocation position (13) of the second typesetting file (3) in four directions of every downwards moved 1 pixel is determined until the bottommost end of the matrix of the second typesetting file (3) is aligned with the bottom end of the matrix of the first typesetting file (2), and the circular is ended
Step six, determining the optimal borrowing position: comparing the offset values of the second typesetting file (3) after collision in four directions each time, wherein the maximum collision offset value Jv-max is the maximum borrowing position of the direction in which the maximum collision offset value is located;
step seven, determining an optimal dislocation position (13) of the optimal file: if a plurality of files are available, the collision method is processed according to the collision methods from the first step to the sixth step, the collision results of the optimal borrows of the plurality of files are compared, and the optimal dislocation position (13) of the optimal file is determined.
As shown in fig. 1, in the original layout process, the first layout file (2) and the second layout file (3) are integrated through the original layout mode (1) to form a larger original layout occupation area (4); in the new method plate combining process, before the pixels collide with the plate combining (5), the maximum borrowing value (9) of each row of plate combining files is determined, in the pixel collision plate combining (5) process, four directions of every two plate combining files are respectively collided according to a certain angle, after the four directions are successful, a new typesetting occupied domain (7) is formed through pixel typesetting collision points (6) of each direction, compared with the original typesetting occupied domain (4) in the original typesetting mode (1), the new typesetting occupied domain (7) obtains a saving occupied domain (8) with a certain size, and the size of the saving occupied domain (8) is determined according to the optimal dislocation position (13) generated by the pixel collision plate combining (5) between the first typesetting file (2) and the second typesetting file (3).
It should be noted that, in the process of pixel collision plate combining (5) of every two plate combining files, the collision positions are all directions of the first typesetting file (2) and the second typesetting file (3); in the process of pixel collision plate combining (5) of every two plate combining files, the rotation frequency angle for adjusting the collision direction is generally 90 degrees and multiples thereof; in the pixel collision plate combining (5) process, the first typesetting file (2) and the second typesetting file (3) are horizontally arranged and sequentially carried out, when the maximum borrowing value (9) of the file is judged, if a gap value larger than a set value is generated between the first typesetting file (2) and the second typesetting file (3), the second typesetting file (3) can be automatically folded for processing, and the optimal dislocation position (13) is the optimal solution of the omnibearing collision combination of the first typesetting file (2) and the second typesetting file (3), namely the occupied area (8) is saved.
The invention has the beneficial effects that: 1. designing a method for determining an optimal borrowing position of a printing plate combining by using a pixel collision method, and determining the maximum borrowing four-way search of each line of combined plate file before pixel collision by using a digitizing technology and a programming technology in the whole combined plate optimizing process, so as to carry out file combined plate occupation domain value pre-estimation, namely a maximum borrowing value; 2. and the pixel collision process is utilized, four directions of each file are respectively collided according to a certain angle rotation, such as 90-degree rotation angle, and the second typesetting file is respectively collided in a dislocation manner in the horizontal direction and the vertical direction until the optimal dislocation position of the two files is found and ensured, the optimization of the domain space in the plate combining process is ensured, and the plate combining cost is saved.
Claims (6)
1. A method for determining an optimal borrowing position of a printing plate by using a pixel collision method mainly comprises the following operation processes of performing pixel collision plate combination (5), calculating a maximum borrowing value (9) and determining an optimal dislocation position (13):
step one, digitizing a file matrix: newly creating a canvas, converting a PDF format combined file into a PNG format file according to a ratio of 1:1 to take the value of a Matrix of pixels, digitizing the file, defining a pixel Matrix as an m multiplied by n Matrix, wherein Matrix (i, j) represents the ith row of the taken Matrix a, data of the jth column, matrix (j) represents the jth column of data, and Matrix (i,) represents the ith row of data;
step two, binarizing the file image: the PNG format file is subjected to image binarization, namely 0 and 1, a blank area is represented by 0, namely a 0 value area (10), a content area is represented by 1, namely a 1 value area (11), and a file outline (12) can be obtained;
judging the maximum borrowing position of the file: taking values from four directions of the file according to an image binarization matrix respectively, if the values are 0, taking the values until the values are 1, storing each row of values as a borrow array, calculating the number m of each array, wherein the maximum borrow J-max in the direction is the borrow corresponding to the maximum m value, taking out the maximum borrow in other directions in the same way, and comparing and determining the maximum borrow J-max of the file; each edition combining file determines the maximum borrowing position by the method;
step four, calculating a maximum borrowing value (9): the borrow value Jvi =the number mi of the corresponding borrow array, and the maximum borrow value Jv-max is the number of the corresponding maximum borrow array;
step five, pixel collision plate combining (5) process: the pixel collision process starts from the canvas edge position, and the specific operation content is as follows:
1) creating a canvas, putting a file with the largest expansion area, if the expansion areas of a plurality of files are the same, randomly selecting one file as the file with the largest area, placing the largest borrow in the horizontal direction or the downward vertical direction, and then putting a second typesetting file (3) in the horizontal direction of the first typesetting file (2), wherein the top end of the second typesetting file (3) in the horizontal direction is aligned with the top end of the first typesetting file (2); the Matrix value of the rightmost line of the maximum borrow of the first typesetting file (2) is Matrix-a (n,), n=the width of the first typesetting file (2), the Matrix value of the leftmost line of the maximum borrow of the second typesetting file (3) is Matrix-b (i,), the second typesetting file (3) is horizontally offset to the left by 1 pixel, namely the offset value m=1, then one line of Matrix values Matrix-b (i-m) of the offset i and Matrix-a (n,) are taken for carrying out 'bitwise AND' calculation, if Matrix-b (i-m,) & Matrix-a (n,) =1, pixel collision occurs, and the optimal borrow of the two files in the current direction is found; if not, continuing to horizontally shift according to the shift value m+1, then taking a Matrix value Matrix-b (i- (m+1)) of the shift value m+1' from the opposite direction of the shift value m+1, performing bit-wise AND calculation on Matrix-a (n) and Matrix-b (i- (m+1)), and counting the calculation result, if the result is 1, generating pixel collision; then, collision is carried out on the other three directions of the second typesetting file (3) according to the method;
2) Then, the horizontal direction of the second typesetting file (3) is downwards moved by one pixel j-1 compared with the top end of the first typesetting file (2), circular collision is carried out according to the collision process, and the optimal dislocation positions (13) of the second typesetting file (3) in four directions of downwards moved 1 pixel each time are determined until the bottommost end of the matrix of the second typesetting file (3) is aligned with the bottom end of the matrix of the first typesetting file (2), and the circular is ended;
step six, determining the optimal borrowing position: comparing the offset values of the second typesetting file (3) after collision in four directions each time, and determining the maximum collision offset value Jv-max, wherein the maximum borrowing position of the direction of the maximum collision offset value is the optimal borrowing position;
step seven, determining an optimal file optimal dislocation position (13): if a plurality of files are available, the collision method is processed according to the collision methods from the first step to the sixth step, the collision results of the optimal borrows of the plurality of files are compared, and the optimal dislocation position (13) of the optimal file is determined.
2. The method for determining the optimal borrowing position of the printing plate combining method by using the pixel collision method according to claim 1, wherein the collision position is all directions of the first typesetting file (2) and the second typesetting file (3) in the process of carrying out pixel collision plate combining (5) on every two plate combining files.
3. The method for determining optimal borrowing positions for printing plate combining by using pixel collision method according to claim 1, wherein the rotation frequency angle of the collision direction is adjusted to be 90 degrees and multiples thereof in the process of carrying out pixel collision plate combining (5) on every two plate combining files.
4. The method for determining an optimal borrowing position for printing by using a pixel collision method according to claim 1, wherein the first typesetting file (2) and the second typesetting file (3) are horizontally arranged and sequentially performed in the pixel collision plate combining (5) process.
5. The method for determining optimal borrowing position of printing composite plate by utilizing pixel collision method according to claim 1, wherein when judging the maximum borrowing value (9) of the file, if a gap value larger than a set value is generated between the first typesetting file (2) and the second typesetting file (3), the second typesetting file (3) is automatically folded.
6. The method for determining an optimal borrowing position of a printing imposition by using a pixel collision method according to claim 1, wherein the optimal dislocation position (13) is an optimal solution of an omnibearing collision combination of a first typesetting file (2) and a second typesetting file (3), namely, the largest saving occupied area (8) in the combination.
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