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Image processing apparatus and its method

An image processing device and technology combined with the device are applied in the directions of image communication, electrical digital data processing, permanent visual display devices, etc., which can solve problems such as image quality degradation and achieve the effect of preventing image quality degradation.

Inactive Publication Date: 2006-02-08
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] When trapping subdivided data when converting from application data to PDL data or converting from PDL data to intermediate data, trapping is performed on all subdivided objects. As a result, like Figure 4 As shown, the trapping process leads to the degradation of image quality

Method used

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  • Image processing apparatus and its method
  • Image processing apparatus and its method

Examples

Experimental program
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Embodiment approach 1

[0041] In order to solve the problem of subdividing the above-mentioned objects, for example, in the state of intermediate data, compare the colors of adjacent objects, if the colors are the same, you can consider adding this kind of processing of combining objects (refer to Figure 24 ). Through this processing, it is possible to avoid deterioration of image quality when trapping is performed on each subdivided object. In this case, since it is necessary to determine the colors of all objects and adjacent objects, the processing time increases. In addition, because the object data is stored in the drawing order in the intermediate data, the color judgment is also in this order, and they are not originally the same object, but even for overlapping objects with the same color, there is a combination process.

[0042] Therefore, it is conceivable to consider a solution in which the metadata indicating the combination of objects is generated in a different way, and the processin...

Embodiment approach 2

[0090] Next, image processing related to Embodiment 2 of the present invention will be described. In addition, in Embodiment 2, the same symbols are attached to the same configuration as in Embodiment 1, and detailed description thereof will be omitted.

[0091] FIG. 14 is a block diagram showing a printing system of Embodiment 2. FIG.

[0092] The cluster server 112 has an interpreter 121 for analyzing PDL data and an intermediate data generation unit 122 for generating intermediate data based on the analysis result. A plurality of print servers 113a, 113b, 113c, . . . , 113n are connected to printers 114a, 114b, 114c, . . . , 114n, respectively. The cluster server 112 distributes the print job to a plurality of print servers 113 and performs print processing using a plurality of printers 114 in consideration of distributing the load of the print job.

[0093] Figure 15 is a diagram showing the flow of print processing including trapping processing. What is important her...

Embodiment approach 3

[0107] The image processing of Embodiment 3 of the present invention will be described below. In addition, in Embodiment 3, the same symbols are assigned to the same configuration as in Embodiments 1 and 2, and detailed description thereof will be omitted.

[0108] FIG. 23 is a flowchart showing the processing of the cluster server 112 of the third embodiment. In Figure 23, for the Figure 21 The same process is given the same symbol, and its detailed description will be omitted.

[0109] In the trapping setting 123 of step S2402, a distributed trapping process can be instructed. That is to say, if the print server 113 can be expected to perform sufficiently high-speed processing, the entire trapping process can also be performed by the print server 113, and if it is possible to set whether to distribute the trapping process in the trap setting 123, it can Provides degrees of freedom to the printing system.

[0110] Therefore, the cluster server 112 determines whether dist...

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Abstract

When a trapping process is applied to data which are subdivided upon conversion from application data into PDL data or conversion from PDL data into intermediate data, the trapping process is applied to all subdivided objects. As a result, the trapping process brings about image quality drop. Hence, a clustering server receives PDL data, analyzes the PDL data to generate intermediate data and meta data, executes an object combining process with reference to the meta data, executes a trapping former half process, and transmits only the intermediate data to a printing server. A printing server applies a trapping latter half process to the received intermediate data.

Description

technical field [0001] The present invention relates to an image processing device and its method, and in particular to a plate offset correction method for correcting the printing position offset of a color plate. Background technique [0002] In the version offset correction (hereinafter referred to as "trapping") of the color printer's C, M, Y, and K color plates for correcting the offset of the printing position, there is a PS (PostScript)  ), PDF (Portable Document Format), EPS (Encapsulated PostScript  ) and other forms of print description language data (hereinafter referred to as "PDL data") prepared in advance by operators. In addition, there is intermediate data used in the printing system that processes and rewrites the PDL data itself based on information written in the PDL data, or converts the analyzed PDL data into Each object is held as the PathData of the outline) and rewritten to rewrite the bitmap data generated in the output device. [0003] The PDL ...

Claims

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Application Information

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IPC IPC(8): G06K15/02
CPCH04N1/58G06F3/1248G06K15/02G06F3/1204G06K2215/0094G06F3/1288G06K15/1826
Inventor 天野博之
Owner CANON KK
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