JP5512449B2 - Page description data processing apparatus, method and program, and printed matter production method - Google Patents

Description

  The present invention performs a specific process on page description data having a predetermined attribute among page description data described in a page description language (PDL), and provides more robust page description data ( In this specification, the present invention relates to a page description data processing apparatus, method and program for converting into robust page description data) and a printed matter production method.

  Recently, in the field of printing plate making, DTP processing that incorporates characters and images created by an operator using a computer into an electronic page using the computer with DTP (DeskTop Publishing) application software installed has become widespread. doing.

  In the above DTP application software, page description data representing an image for each page is created based on elements such as characters and images edited by an operator.

  The page description data is vector data that does not depend on the resolution or the like of an output device such as a printer or a plate setter, and cannot be output from the output device as it is. Thus, the page description data is rasterized (sampled) by RIP (Raster Image Processor) to convert the elements such as characters and images constituting the page into raster image data representing a set of pixels (dots).

  When the raster image data is supplied to an output device such as a printer or a plate setter, the output device outputs a hard copy or a printing plate on which an image based on the raster image data is formed (see Patent Document 1).

  By the way, PDF (Portable Document File) version 1.3, which is a type of page description data, is equipped with a “shading pattern” (operator or dictionary) that controls a smooth color change covering the area to be painted. For this shading pattern, not only the type in which the color changes along the axis and the circle but also the type in which the color changes on a function basis can be applied.

JP-A-2005-70957 ([0003])

PDF Reference 2nd Edition, Adobe Portable Document Format Version 1.3, November 20, 2008, first edition, 5th edition, author; Adobe Systems, Publisher; Pearson Education, ISBN 4-89471-338-1, 106- See page 109, pages 185-212, etc.

  However, there are cases where an unexpected problem may occur when rasterization processing is performed by RIP after generating various shading patterns using the above-mentioned specifications of PDF.

  For example, the drawing area 3 of the drawing object 2 shown in FIG. 9A is provided with a background portion 4 uniformly filled with a predetermined color (background color) and a circular shading pattern 6.

  In the shading pattern 6, the center coordinate O of a circle for starting shading (hereinafter referred to as a start circle) is (0, 0), and its radius is 50. On the other hand, the center coordinate of a circle for finishing shading (hereinafter referred to as an end circle) is (−35, −35), and its radius is 10.

  The description method of the drawing object 2 may differ depending on the type and version of the page description data creation software. As a first example, it is described that a circular second drawing object (shading pattern 6) independent of the first drawing object is superimposed on a rectangular first drawing object (drawing object 2). it can. As a second example, it is described that the entire drawing area 3 of one drawing object 2 is uniformly filled with the background color, overwritten thereon, and a predetermined circular area is again filled as the shading pattern 6. Can do. Also, in the second example, the application range to be overwritten by shading can be limited to the circle area (a clipping path is set), or can be extended to the entire drawing area 3. Good.

  When rasterizing the page description data having the same drawing contents but different description methods, processing results different from the intended one may be obtained depending on the RIP calculation algorithm and software version. According to the experiment results of the present inventor, as shown in the example of FIG. 9B, instead of the shading pattern 6 (see FIG. 9A), there is a case where the shading pattern 8 whose lower left portion protrudes in a crescent shape is drawn. .

  As described above, when a specific shading pattern is generated, there is a case where shading paint different from the prospective is executed depending on the combination of the description method and the RIP. Therefore, when the rasterizing process is performed on page description data including a specific shading pattern, it may be a cause of an unexpected printing defect that makes it difficult to identify the cause of occurrence. For example, when page description data in which a “Background” attribute (an entry for designating a background color) is added to a shading dictionary is rasterized, there is a tendency to become particularly apparent.

  The present invention has been made to solve the above-described problem, and a page description data processing apparatus, method, and method that can prevent printing problems that may occur when rasterizing processing is performed on page description data including a specific shading pattern. It is an object to provide a program and a printed matter production method.

The page description data processing apparatus according to the present invention includes a specific drawing object that fills a part of a drawing area with shading and uniformly paints a remaining area with a predetermined background color from input page description data. A specific drawing object identifying unit for identifying presence / absence, and an operator group describing the specific drawing object when the specific drawing object is identified by the specific drawing object identifying unit; a first operator unit describing uniformly fill the first drawing object in color, and the operator replacing unit for replacing a portion of the drawing area and a second operator group describing the second drawing object fill in the shading have a, the operator replacement unit, upstream and downstream of the operations by replicating the operator group The first operator group in which the shading drawing process is excluded from the preceding operator group, and the second operator group in which the background color drawing process is excluded from the subsequent operator group. Replace with.

  Further, the specific drawing object identification unit identifies that there is a region definition operator that defines the drawing region in the operator group, and there is a shading operator in which the background color of the drawing region is specified. When it is determined, it is preferable that the specific drawing object is identified.

  Furthermore, it is preferable that the operator replacement unit performs replacement so that the second operator group is executed immediately after the first operator group.

In the page description data processing method according to the present invention, a specific drawing object that fills a part of a drawing area with shading and uniformly fills a remaining area with a predetermined background color from input page description data. A step of identifying presence / absence, and a group of operators that describe the specific drawing object when the specific drawing object is identified, and a first drawing object that uniformly fills the entire drawing area with the background color describe a first operator group, the part of the drawing area to perform the step of replacing the second operator unit describing a second drawing object fill in the shading to the computer, in the replacing step, the operator After duplicating the group to coexist with the preceding and succeeding operator groups, the preceding operator group Said first operator group excluding the drawing process of al the shading, replacing from the subsequent operator groups and the second operator group excluding the drawing processing of the background color.

The program according to the present invention enables the computer to detect whether or not there is a specific drawing object that fills a part of the drawing area with shading and uniformly fills the remaining area with a predetermined background color from the input page description data. A specific drawing object identifying unit for identifying the first drawing for uniformly filling the entire drawing area with the background color when an operator group describing the specific drawing object is identified. a first operator unit describing the object, is the functional part of the drawing area as an operator replacing unit that replaces the second operator unit describing a second drawing object fill in the shading, the operator replacing unit, After duplicating the operator group to coexist with the operator group at the former stage and the latter stage, Replacing of the first operator group from the operator group excluding the drawing process of the shading, the said second operator group from the operator group excluding the drawing processing of the background color of the subsequent stage.

  In the identification step, when it is determined that there is a region definition operator that defines the drawing region in the operator group, and it is determined that there is a shading operator in which the background color of the drawing region is specified It is preferable to identify that the specific drawing object is present.

  Furthermore, in the replacement step, it is preferable that replacement is performed so that the second operator group is executed immediately after the first operator group.

  The printed matter production method according to the present invention includes a proofreading step for outputting a proof image based on page description data to be printed, and any one of the above-described page description data processing methods. And processing steps for processing the page description data.

  According to the page description data processing apparatus, method and program, and printed matter production method according to the present invention, there is provided a specific drawing object that fills a part of a drawing area with shading and uniformly paints a remaining area with a predetermined background color. When it is identified that there is an operator group that describes the specific drawing object, a first operator group that describes a first drawing object that uniformly fills the entire drawing area with the background color, Since the second operator group describing the second drawing object that partially paints with shading is replaced, the process of uniformly filling the entire drawing area with the background color in the process of rasterizing by RIP, The process of filling a part of the drawing area with shading is reliably executed without being influenced by each other. That is, it is possible to prevent a phenomenon in which the drawing result of the shading pattern is indefinite. As a result, it is possible to prevent printing problems that may occur when rasterizing the page description data including a specific shading pattern.

It is a schematic block diagram of the publishing system which enforces the page description data processing method concerning this Embodiment. It is a functional block diagram of the page description data processing apparatus shown in FIG. It is a flowchart with which operation | movement description of the page description data processing apparatus concerning this Embodiment is provided. It is explanatory drawing which shows an example of the input page description data (PDF file). It is a flowchart explaining the separation / replacement method of the shading operator. 6A to 6D are schematic views for explaining the separation / replacement process of the shading operator. 7A and 7B are schematic explanatory diagrams showing the replacement progress of the page description data shown in FIG. FIG. 5 is an explanatory diagram showing an example of page description data obtained by using the page description data processing method according to the present embodiment for the page description data shown in FIG. 4. FIG. 9A is a schematic explanatory diagram illustrating appropriate drawing contents of a drawing object. FIG. 9B is a schematic explanatory diagram illustrating an inappropriate drawing example of a drawing object.

  Hereinafter, embodiments of a page description data processing apparatus, method, and program according to the present invention will be described with reference to the accompanying drawings, taking as an example a publishing system that implements the same.

  FIG. 1 is a schematic configuration diagram of a publishing system 10 that implements the page description data processing method according to the present embodiment.

  The publishing system 10 includes a prepress process, a printing process, and a bookbinding process (not shown).

  The prepress process includes a DTP computer 12, a page description data processing device 14 including a personal computer, a RIP 16, a printer 20, and a platesetter 22.

  The DTP computer 12 creates page description data Dp described in a page description language that expresses an image for each page based on elements such as characters and images edited by an operator.

  The page description data processing device 14 examines the contents (attributes) of the page description data Dp output from the DTP computer 12, and performs specific processing on the page description data Dp having a predetermined attribute according to the investigation result. Then, the processed robust page description data Dp ′ is generated, or the page description data Dp having no predetermined attribute is output as it is. Note that the processing function of the page description data processing device 14 can be integrated into the DTP computer 12 and the page description data processing device 14 can be omitted.

  The RIP 16 converts the page description data Dp or the robust page description data Dp ′ output from the page description data processing device 14 into, for example, raster image data Dr for each of CMYK4 versions.

  The printer 20 outputs a proof 18 (proof image) that is a hard copy based on the raster image data Dr.

  When the operator determines that the proof 18 printed by the printer 20 is OK, the plate setter 22 prints each of the CMYK 4 plates from the raster image data Dr as the output of the RIP 16 after the operator operates the start switch. Create and output a version PP.

  A printing machine 24 is provided in the printing process. A CMYK 4-plate printing plate PP is mounted on the printing machine 24, and CMYK ink carried on the printing plate PP is transferred onto the main paper to perform multi-color (four-color) printing, thereby completing the printed matter 26. .

  FIG. 2 shows a block diagram of functions realized by the CPU of the page description data processing device 14 executing a program recorded in the ROM.

  The page description data processing device 14 creates the robust page description data Dp ′ obtained by analyzing or processing the page description data Dp input through the input I / F (interface) 32, or the original page description data Dp. Is output through an output I / F (interface) 34.

  In addition to the input I / F 32 and the output I / F 34 described above, the page description data processing device 14 includes a drawing object identification unit 36 (specific drawing object identification unit) that identifies the presence or absence of a specific drawing object (specific drawing object), And an operator replacement unit that replaces an operator group describing the drawing object when it is identified that there is a specific drawing object.

  The “drawing object” in this specification means each component of two-dimensional graphics (or three-dimensional graphics), and is a concept narrower than the “object” used in the technical field of software engineering. The “operator group” includes not only a set of a plurality of operators but also a single operator.

  The drawing object identification unit 36 includes a structure analysis unit 40 that analyzes the structure of the page description data Dp, an area definition operator identification unit 42 that identifies the presence / absence of an area definition operator, and a shading operator that specifies the background color of the drawing area. A shading operator determining unit 44 for determining presence or absence.

  Note that “area definition operators” in this specification is an operator group used to describe a path object that defines a drawing area (closed area). The “path object” is an arbitrary shape composed of a straight line, a rectangle, and a curve (for example, a cubic Bezier curve).

  In addition, the “shading operator” in this specification refers to an operator that controls a smooth color change covering the paint target area. The shading operator includes not only an operator format but also a dictionary format.

  The shading operator determination unit 44 includes an operator presence / absence confirmation unit 46 that confirms the presence / absence of a shading operator, and a background color designation presence / absence confirmation unit 48 that confirms whether or not a background color is designated in the shading operator.

  Basically, the operation of the page description data processing device 14 of the publishing system 10 configured as described above will be described with reference to the flowchart of FIG.

  In step S1, the page description data processing device 14 takes in the page description data Dp output from the DTP computer 12 for each page.

  FIG. 4 is an explanatory diagram showing an example of input page description data Dp (PDF file). The page description data Dp includes a tenth object (lines L1001 to L1003), an eleventh object (lines L1101 to L1109), a twelfth object (lines L1201 to L1208), and a twentieth object (lines L2001 to L2001). L2051).

  Hereinafter, of the operators in the page description data Dp (PDF file), only the operators necessary for clarifying the technical features of the present invention will be described. For details, refer to the above-mentioned non-patent document (PDF Reference 2nd Edition).

  The dictionary 94 in the tenth object defines the shading dictionary described by the eleventh object as “Sh1”.

  A dictionary 96 in the eleventh object defines the details of circular shading. The center coordinates of the start circle of shading are (−0.7, −0.7), and the radius is 0.1. On the other hand, the center coordinate of the end circle of shading is (0, 0), and its radius is 1.

  A dictionary 98 in the twelfth object defines a function form referenced by the eleventh object. Specifically, in the device CMYK space, a functional form of C = 0.3t, M = 0.4t, Y = 0.5t, K = 0.6t is represented. Here, 0 ≦ C, M, Y, K, and t ≦ 1.

  The operator group 100 in the 20th object draws the drawing object 2 (see FIG. 9A) in a predetermined page area while referring to the dictionaries 94, 96, and 98.

  In step S2, the structure analysis unit 40 analyzes the structure of the page description data Dp and extracts objects included in the page. Thereafter, the region definition operator identification unit 42 identifies whether or not the object acquired from the structure analysis unit 40 includes a region definition operator. If the area definition operator is not included, the page description data Dp is output through the output I / F 34 without being changed (step S6).

  For example, the region definition operator identifying unit 42 identifies the presence / absence of the region definition operator by considering the presence / absence of the path construction operator, the operator arrangement order, and the like. The path construction operator includes “m” for moving the current point, “l” for adding a straight line to the current path, “c”, “v”, “y” for adding a curve to the current path, and the like. In the example of FIG. 4, the area definition operator identification unit 42 identifies that an area definition operator that describes a rectangular drawing area is included from the descriptions of the lines L2011 to L2015. In this case, the region definition operator identification unit 42 supplies the page description data Dp to the shading operator determination unit 44.

  In step S3, the operator presence / absence confirmation unit 46 confirms whether there is a shading operator to which shading is applied in the drawing area described by the area definition operator identified in step S2. If there is no shading operator, the page description data Dp is output as it is through the output I / F 34 without being changed (step S6).

  For example, the operator presence / absence confirmation unit 46 determines whether or not there is a shading operator “sh” between the operator “m” serving as the starting point of the target range and the operator “m” for forming the next current path. Check. In the example of FIG. 4, it is determined that there is a shading operator from the descriptions of the lines L2011, L2019, and L2021. In this case, the operator presence / absence confirmation unit 46 supplies the page description data Dp to the background color designation presence / absence confirmation unit 48.

  In step S4, the background color designation presence / absence confirmation unit 48 confirms whether the background color is designated for the shading object confirmed in step S3. If the background color is not designated, the page description data Dp is output through the output I / F 34 without being changed (step S6).

  For example, the background color designation presence / absence confirmation unit 48 refers to the resource name of the dictionary corresponding to the shading operator, and confirms whether or not the “Background” attribute is given to the dictionary. In “Background”, a single color value can be specified, and whether or not to include this attribute in the shading dictionary (operator) is arbitrary.

  In the example of FIG. 4, the background color designation presence / absence confirmation unit 48 determines that a background color is designated for the shading operator “Sh1” from the descriptions of the lines L1002, L1102 to L1107 (particularly, the line L1104) and L2019. In this case, the background color designation presence / absence confirmation unit 48 supplies the page description data Dp to the operator replacement unit 38.

  In step S5, the operator replacement unit 38 replaces the shading operators (operator group 100 in FIG. 4) confirmed and discriminated in steps S3 and S4 with a first operator group 106 and a second operator group 110 (see FIG. 8) described later. Separated and replaced.

  Hereinafter, the shading operator separation / replacement process will be described in detail with reference to the flowchart of FIG.

  In step S51, the operator replacement unit 38 determines a target range of this process. The operator replacement unit 38 may include all the page description data Dp acquired from the drawing object identification unit 36 at once in the target range. Alternatively, the operator replacement unit 38 may determine the target range after acquiring the target range determined by the drawing object identification unit 36. In the example of FIG. 4, it is assumed that the operator replacement unit 38 has determined the operator group 100 among the stream objects (20th object) as the target range of this processing.

  As illustrated in FIG. 6A, the drawing object 200 is drawn in a predetermined page area based on the description of the operator group 100. A drawing area 201 of the drawing object 200 shows a circular shading pattern 202 and a background portion 204 that is uniformly painted with a predetermined background color. For convenience of description, coloring of the shading pattern 202 is omitted in FIG. 6A and FIGS. 6B to 6D described later.

  In step S52, the operator replacement unit 38 copies the target data. That is, data having the same content as the operator group 100 (lines L2011 to L2020) in FIG. 4 is duplicated and inserted between the lines L2020 and L2021.

  Then, as shown in FIG. 7A, the original operator group 100a is described in the lines L2011 to L2020, and the duplicate operator group 100b is described in the lines L2021 to L2030.

  As shown in FIG. 6B, the original drawing object 200a (the drawing area 201, the shading pattern 202a, and the background portion 204a) is drawn in a predetermined page area by the description of the original operator group 100a. Further, the duplicate drawing object 200b (the drawing area 201, the shading pattern 202b, and the background portion 204b) is drawn by the description of the duplicate operator group 100b.

  Actually, the drawing area 201 of the original drawing object 200a matches the drawing area 201 of the duplicate drawing object 200b. For convenience of explanation, the position of the duplicate drawing object 200b is slightly shifted in the upper left direction.

  Note that the original operator group 100a is described in a line preceding the duplicate operator group 100b. Therefore, the drawing process in the original operator group 100a is executed before the drawing process in the duplicate operator group 100b. That is, the original drawing object 200a is arranged on the back side of the duplicate drawing object 200b.

  In step S53, the operator replacement unit 38 generates the first operator group 106 by rewriting part of the first half data (original operator group 100a). The first operator group 106 is obtained by excluding the drawing operator of the shading pattern 202a (see FIG. 6B) from the original operator group 100a.

  First, the operator replacement unit 38 acquires a color space definition (device CMYK space in the example of FIG. 4) based on the description of the line L1103 in FIG. Then, the operator replacement unit 38 acquires the color value of the background color (C = 10%, M = 20%, Y = 30%, K = 40% in the example of FIG. 4) based on the description of the line L1104.

  7A and 7B, the operator replacement unit 38 rewrites the description of the line L2018 to the operator 102 and rewrites the description of the line L2019 to the operator 104. The operator 102 sets the color value of the device CMYK space (C = 10%, M = 20%, Y = 30%, K = 40% in the example of FIG. 7B) as the current color (graphics state variable). It is. In addition, the operator 104 appoints the closed region generated by the current path (in the example of FIG. 7, coordinates (100, 100), (-100, 100), (-100, -100), and (100, -100)). Is a square-shaped area}.

  As shown in FIG. 6C, the first drawing object 206 is drawn in place of the original object 200a (see FIG. 6B) in a predetermined page area based on the generated description of the first operator group 106. The first drawing object 206 has a background portion 204 in which the drawing area 201 is uniformly painted with a background color.

  In this manner, the operator replacement unit 38 temporarily replaces the page description data Dp shown in FIG. 7A with the page description data Dp ′ shown in FIG. 7B. At this time, the newly generated first operator group 106 corresponds to an operator group that describes the first drawing object 206 that uniformly fills the entire drawing area 201 with the background color.

  Finally, in step S54, the operator replacement unit 38 generates the second operator group 110 by rewriting a part of the latter half data (replicated operator group 100b). The second operator group 110 is obtained by excluding the drawing of the background portion 204b (see FIG. 6C) from the duplicate operator group 100b.

  First, the operator replacement unit 38 acquires a resource name (“Sh1” in the example of FIG. 4) to be referred to based on the description of the line L2019 in FIG. Then, the operator replacement unit 38 acquires a resource name to be further referred to based on the description of the line L1002 (the 11th object in the example in FIG. 4).

  Then, as shown in FIGS. 7B and 8, the operator replacement unit 38 deletes L1104 corresponding to the background color designation entry in the eleventh object (dictionary 96).

  As shown in FIG. 6D, the second drawing object 208 is drawn in place of the original object 200b (see FIG. 6B) in a predetermined page area based on the generated description of the second operator group. The second drawing object 208 has a shading pattern 202 and a blank portion 210 that is the remaining area of the drawing area 201.

  As described above, the operator replacement unit 38 replaces the page description data Dp ′ shown in FIG. 7B with the page description data Dp ′ shown in FIG. 8. At this time, the newly generated second operator group 108 corresponds to an operator group that describes the second drawing object 208 that fills a part of the drawing area 201 with the shading pattern 202. Although the new second operator group 108 matches the duplicate operator group 100b, the contents of the referenced dictionaries 98 and 110 are different, and therefore different reference numerals are given.

  In this way, the operator replacement unit 38 executes the shading operator separation / replacement process (step S5). Note that the operator separation / replacement method is not limited to the above-described method, and various methods for obtaining an equivalent calculation result can be adopted. Alternatively, the second operator group 110 may be replaced immediately after the first operator group 106.

  Returning to FIG. 3, in step S <b> 6, the page description data Dp ′ separated and replaced by the first operator group 106 and the second operator group 108 by the operator replacement unit 38 is output through the output I / F 34.

  In this way, as shown in FIG. 1, the page description data Dp input to the page description data processing device 14 is supplied to the RIP 16 side as it is (Dp) or after being subjected to operator replacement processing (Dp ′). Is done.

  As a result, by superimposing the second drawing object 208 generated in step S54 on the first drawing object 206 generated in step S53, an output equivalent to the drawing object 200 (see FIG. 6A) is obtained. Even page description data Dp including a specific shading pattern can be output stably.

  In this way, a drawing object that fills part of the drawing area 201 with the shading pattern 202 from the input page description data Dp and uniformly fills the background portion 204 (residual area) with a predetermined background color. When the existence of the drawing object 200 is identified, the operator group 100 describing the drawing object 200 is described, and the first drawing object 206 that fills the entire drawing area 201 with the background color is described. Since the first operator group 106 and the second operator group 110 describing the second drawing object 208 that fills a part of the drawing area 201 (the area of the shading pattern 202) with shading are replaced, the rasterization by the RIP 16 is performed. In this process, the entire drawing area 201 is uniformly coated with the background color. A process of crushing, and partially fill with shading process of the drawing area 201 is performed reliably without being influenced by the other.

  That is, it is possible to prevent a phenomenon in which the drawing result of the shading pattern 202 is indefinite. Thereby, it is possible to prevent a printing defect that may occur when the rasterization process is performed on the page description data Dp including a specific shading pattern.

  In addition, the page description data processing method according to the present embodiment may be used before a proof image (proof 18 or the like) is output by the printer 20 or a display device based on the page description data Dp to be printed. . As a result, the drawing result of the shading pattern by the RIP process at the time of calibration substantially matches the drawing result of the shading pattern by the RIP process at the time of output (press plate or printing). That is, it is possible to prevent printing defects that may occur when performing rasterization processing on page description data including a specific shading pattern. In particular, when a plurality of RIP processing steps are performed in the process of producing the printed matter 26, it is preferable to use the page description data processing method according to the present embodiment in the upstream steps as much as possible.

  In addition, this invention is not limited to embodiment mentioned above, Of course, it can change freely in the range which does not deviate from the main point of this invention.

  In the present embodiment, the description has been made centering on PDF, but the page description language is not limited to this. For example, the present invention can be applied to PostScript (registered trademark) of Adobe Systems, XPS (XML Paper Specification), and the like.

10 ... Publishing system 12 ... DTP computer 14 ... Page description data processor 16 ... RIP
DESCRIPTION OF SYMBOLS 18 ... Proof 20 ... Printer 22 ... Plate setter 24 ... Printing machine 26 ... Printed matter 36 ... Drawing object identification part 38 ... Operator replacement part 40 ... Structure analysis part 42 ... Area definition operator discrimination | determination part 44 ... Shading operator discrimination | determination part 46 ... Operator presence / absence Confirmation unit 48 ... Background color designation presence / absence confirmation unit 100 ... Operator group 100a ... Original operator group 100b ... Duplicated operator group 106 ... First operator group 108 ... Second operator group 200 ... Drawing object 201 ... Drawing area 202 (a, b) ... shading pattern 204 (a, b) ... background part 206 ... first drawing object 208 ... second drawing object 210 ... margin part

Claims (8)

A specific drawing object identification unit for identifying the presence or absence of a specific drawing object that fills a part of the drawing area with shading from the input page description data and uniformly paints the remaining area with a predetermined background color;
When the specific drawing object is identified by the specific drawing object identification unit, an operator group that describes the specific drawing object is defined as a first drawing object that uniformly fills the entire drawing area with the background color. possess a first operator group describing, the operator replacing unit that replaces the second operator unit describing a second drawing object to fill the portion of the drawing area in the shading,
The operator replacement unit duplicates the operator group to coexist the preceding and succeeding operator groups, and then excludes the shading drawing process from the preceding operator group and the succeeding operator group. A page description data processing apparatus, characterized in that the page description data processing device is replaced with the second operator group in which the background color drawing process is excluded from the operator group . The page description data processing device according to claim 1, wherein
The specific drawing object identification unit identifies that there is an area definition operator that defines the drawing area in the operator group, and determines that there is a shading operator in which the background color of the drawing area is specified. In this case, the page description data processing apparatus is characterized in that the specific drawing object is identified. In the page description data processing device according to claim 1 or 2,
The page description data processing apparatus, wherein the operator replacement unit performs replacement so that the second operator group is executed immediately after the first operator group. An identification step for identifying the presence or absence of a specific drawing object that fills a part of the drawing area with shading and uniformly fills the remaining area with a predetermined background color from the input page description data;
A group of operators describing the specific drawing object when the specific drawing object is identified; a first group of operators describing a first drawing object that uniformly fills the entire drawing area with the background color; , to execute and replacement step of replacing the second operator unit describing a second drawing object to fill the portion of the drawing area in the shading to the computer,
In the replacing step, the first operator group in which the shading drawing process is excluded from the first operator group after the first operator group and the second operator group coexist by duplicating the operator group; and the second operator A page description data processing method characterized by replacing the group with the second operator group excluding the background color drawing process from the group . The page description data processing method according to claim 4, wherein
In the identification step, when it is determined that there is an area definition operator that defines the drawing area in the operator group, and it is determined that there is a shading operator in which the background color of the drawing area is specified, A page description data processing method, characterized by identifying that the specific drawing object is present. The page description data processing method according to claim 4 or 5,
In the replacing step, the page description data processing method is characterized in that replacement is performed so that the second operator group is executed immediately after the first operator group. Computer
A drawing object identification unit for identifying the presence or absence of a specific drawing object that fills a part of the drawing area with shading from the input page description data and uniformly paints the remaining area with a predetermined background color;
A group of operators describing the specific drawing object when the specific drawing object is identified; a first group of operators describing a first drawing object that uniformly fills the entire drawing area with the background color; , to function as an operator replacing unit that replaces the second operator unit describing a second drawing object to fill the portion of the drawing area in the shading,
The operator replacement unit duplicates the operator group to coexist the preceding and succeeding operator groups, and then excludes the shading drawing process from the preceding operator group and the succeeding operator group. A program replacing the operator group with the second operator group excluding the background color drawing process . A proofreading step for outputting a proofreading image based on the page description data to be printed;
A method for producing printed matter, comprising: using the page description data processing method according to any one of claims 4 to 6 and processing the page description data before executing the proofreading step.

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