CN1731423A - A method for quick recognition of color page based on preview picture - Google Patents
A method for quick recognition of color page based on preview picture Download PDFInfo
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- CN1731423A CN1731423A CN 200510090213 CN200510090213A CN1731423A CN 1731423 A CN1731423 A CN 1731423A CN 200510090213 CN200510090213 CN 200510090213 CN 200510090213 A CN200510090213 A CN 200510090213A CN 1731423 A CN1731423 A CN 1731423A
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Abstract
The invention relates to a color page fast identifying method based on a forecast key diagram in the field of computer image processing. The method produces the forecast key diagram of the push-down file when the chart system standardization describes the file; the network processor quotes weather the page is color page according to the forecast key diagram of the page push-down file before the grating the page push-down file so as to choose the justified network color processing mode.
Description
Technical field
The invention belongs to the Computer Image Processing field, be specifically related to a kind of method of the color page quick identification based on preview graph.
Background technology
At present, the positive develop rapidly of the demand of digital printing, the application of digital printing system is also more and more general.The quick equipment that digital printing system connects is also more and more, and wherein significant proportion is the high-speed color printer.When using color printer output page description file, general scheme is that advanced line raster processing sends to the colour print machine equipment behind the generation dot matrix.When grating-based processor is handled a page description file, color mode has bigger influence to processing, selecting " blue or green product are yellow black " color mode is the color mode processing page, with selecting " gray scale " color mode is that the white-black pattern processing page is compared, data volume has bigger increase, and processing speed has bigger reduction; On the other hand, grating-based processor is when the processing page description document, because grating-based processor can not predict whether this page comprises color content, so to all pages, all must use color mode to explain page description file, generate the colour dot lattice data, this disposal route, when page description file only comprises the black and white content, increased the dot array data amount, reduced rasterization process speed.And, to the such equipment of color laser printer, because there is very big difference in the speed of its print black white page face and the printing color page, so, greatly reduced print speed if the black and white page is handled as color page.Handle for official document, if use is color printing apparatus, this problem is just very outstanding, government's working environment particularly, most print file are black and white documents, have only the document of fraction need carry out colour print (for example official document), under this environment, the deficiencies in the prior art are more obvious, obviously, if the black and white page is handled as color page, not only rasterization process speed is lower, and also reduction greatly of print speed, work efficiency is low.
Summary of the invention
At the defective that exists in the prior art, the method that the purpose of this invention is to provide a kind of color page quick identification based on preview graph, this method can be before grating-based processor carries out page rasterization process, can predict whether it comprises color content according to the preview graph of the page, then according to the color attributes of the page, rational rasterisation color tupe is set, thereby improve rasterization process speed, reduce data volume, improve the printout speed of printing device.
For reaching above purpose, the technical solution used in the present invention is: a kind of method of the color page quick identification based on preview graph may further comprise the steps:
(1) in the prepress workflow system, page description file is at first carried out standardization processing, being about to page description file, to be converted into the Portable Document format file be pdf document, generate the dot matrix of the low resolution of page description file simultaneously, this dot matrix is as the preview graph of the page, and described low resolution is meant that the resolution of dot matrix is lower than the output resolution ratio of page description file;
(2) grating-based processor judges according to its preview graph whether this page comprises color content earlier before the rasterisation page description file;
(21) if this page comprises color content, when then the page carries out rasterization process, establish
The color tupe of putting grating-based processor is a color mode, generates the color page dot matrix;
(22) if it is that the page only contains the black and white content that this page does not comprise color content, then the page or leaf
When face carried out rasterization process, the color tupe that grating-based processor is set was the black and white mould
Formula generates black and white page dot matrix;
(3) page is outputed to printing device, the dot matrix that step (21) or step (22) are generated outputs on the printing device and prints.
Further, the resolution of the preview graph of the page description file described in step (1) and the step (2) is 72 points of per inch, and the file layout of the preview graph of page description file is that Joint Photographic Experts Group is that jpeg file form or " tag tmage file " are the Tiff file layout.
Further, in the step (2), when judging according to the preview graph of page description file whether this page comprises color content, the concrete method of judging is, (Microsoft's Graphics Device Interface adds to adopt GDI+, Microsoft Graphics Device Interface Plus), reading in preview graph is a bitmap, and pointwise judges whether this figure is artwork master; If colored point represents that so preview graph is a coloured picture, judge and finish; If the color of each point of preview graph all is a black and white, represent that so preview graph is an artwork master, judge that then page description file does not comprise colour.
Effect of the present invention is: before grating-based processor carries out rasterization process to page description file, judge according to the low resolution preview graph of page description file whether the page is color page, then according to the colored character of the page, rational rasterisation color tupe is set, thereby improve the rasterization process speed of black and white page description file, reduce data volume,, greatly improved the print speed of black and white page description file simultaneously color printing apparatus.
Description of drawings
Fig. 1 is based on the method flow diagram of the color page quick identification of preview graph;
Fig. 2 is that the prompt flow system of upright seal uses process flow diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1 and Figure 2, a kind of method of the color page quick identification based on preview graph, to the north of the prompt flow system of seal of company of big Founder Electronic be example, when connecting this color printing apparatus of Xerox C835 and carry out file printout, may further comprise the steps:
(1) page description file enters the prompt flow system of upright seal;
(2) standardization page description file generates Portable Document format file (PDF, Adobe
Portable Document Format) and the preview graph of page description file, pre-
The form of figure look at is JPEG (JPEG (joint photographic experts group), a kind of compression standard), this
Among the embodiment, the resolution of preview graph is 72 points of per inch;
When (3) the output page description file is to the C835 color printer, to carry out the rasterisation place earlier
Reason.Grating-based processor adopts as Fig. 1 institute before the rasterisation page description file
The step of showing judges whether the page comprises color content; Specifically the method for judging is,
(Microsoft's Graphics Device Interface adds, Microsoft Graphics Device to adopt GDI+
Interface Plus), reading in preview graph is a bitmap, and this figure is judged in pointwise
Whether be artwork master, if colored point represents that so preview graph is a coloured silk
Figure judges and finishes; If the color of each point of preview graph all is a black and white, that
The expression preview graph is an artwork master; If preview graph is an artwork master, judge the page so
Description document does not comprise colour;
(4), rational rasterization process color is set handles according to the judged result of step (3)
Pattern is carried out rasterization process; If color page then is provided with the rasterisation place
The color tupe of reason device is a color mode, generates the color page dot matrix; If
Be the black and white page, the color tupe that grating-based processor then is set is the black and white mould
Formula generates black and white page dot matrix;
(5) dot matrix after the rasterization process being outputed to printing device prints.
Method of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to technological innovation scope of the present invention equally.
Claims (4)
1. method based on the color page quick identification of preview graph may further comprise the steps:
(1) in the prepress workflow system, page description file is at first carried out standardization processing, being about to page description file, to be converted into the Portable Document format file be pdf document, generate the dot matrix of the low resolution of page description file simultaneously, this dot matrix is as the preview graph of the page, and described low resolution is meant that the resolution of dot matrix is lower than the output resolution ratio of page description file;
(2) grating-based processor judges according to its preview graph whether this page comprises color content earlier before the rasterisation page description file;
(21) if this page comprises color content, when then the page carried out rasterization process, the color tupe that grating-based processor is set was a color mode, generated the color page dot matrix;
(22) if it is that the page only contains the black and white content that this page does not comprise color content, when then the page carried out rasterization process, the color tupe that grating-based processor is set was a white-black pattern, generated black and white page dot matrix;
(3) page is outputed to printing device, the dot matrix that step (21) or step (22) are generated outputs on the printing device and prints.
2. the method for a kind of color page quick identification based on preview graph as claimed in claim 1, it is characterized in that: the resolution of the preview graph of the page description file described in step (1) and the step (2) is 72 points of per inch.
3. the method for a kind of color page quick identification based on preview graph as claimed in claim 1 or 2 is characterized in that: the file layout of the preview graph of the page description file described in step (1) and the step (2) is that Joint Photographic Experts Group is a jpeg file form or " tag tmage file is the Tiff file layout.
4. as the sharp method that requires 1 described a kind of color page quick identification based on preview graph, it is characterized in that: in step (2), when judging according to the preview graph of page description file whether this page comprises color content, the concrete method of judging is, adopting GDI+ is that Microsoft's Graphics Device Interface adds, reading in preview graph is a bitmap, and pointwise judges whether this preview graph is artwork master; If colored point represents that so preview graph is a coloured picture; If the color of each point of preview graph all is a black and white, represent that so preview graph is an artwork master, judge that then page description file does not comprise color content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100902139A CN100363945C (en) | 2005-08-10 | 2005-08-10 | A method for quick recognition of color page based on preview picture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100902139A CN100363945C (en) | 2005-08-10 | 2005-08-10 | A method for quick recognition of color page based on preview picture |
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| Publication Number | Publication Date |
|---|---|
| CN1731423A true CN1731423A (en) | 2006-02-08 |
| CN100363945C CN100363945C (en) | 2008-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100902139A Expired - Fee Related CN100363945C (en) | 2005-08-10 | 2005-08-10 | A method for quick recognition of color page based on preview picture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100462911C (en) * | 2006-09-21 | 2009-02-18 | 北京北大方正电子有限公司 | Method for generating large plate lattice data and large plate lattice data senerating apparatus |
| CN101518982B (en) * | 2008-02-29 | 2010-08-25 | 北大方正集团有限公司 | Method and equipment for printing images |
| CN101118592B (en) * | 2007-08-22 | 2011-07-20 | 大连理工大学 | Printers evidence obtaining method based on character printing feature |
| CN101782896B (en) * | 2009-01-21 | 2011-11-30 | 汉王科技股份有限公司 | PDF character extraction method combined with OCR technology |
| CN102402497A (en) * | 2010-09-08 | 2012-04-04 | 北大方正集团有限公司 | Method and device for converting color portable document format (PDF) file into black and white PDF file |
| CN101546384B (en) * | 2008-03-25 | 2013-03-06 | 富士施乐株式会社 | Print control apparatus, printing apparatus and print control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3542428B2 (en) * | 1995-07-20 | 2004-07-14 | キヤノン株式会社 | Image forming apparatus and image display method |
| CN1256837C (en) * | 2001-06-20 | 2006-05-17 | 宇东科技股份有限公司 | Color scanning automatic judging method for scanner |
| JP4211360B2 (en) * | 2002-11-12 | 2009-01-21 | セイコーエプソン株式会社 | Print preview image generation device |
| CN2685935Y (en) * | 2004-01-15 | 2005-03-16 | 李民光 | Digital colour printing system |
-
2005
- 2005-08-10 CN CNB2005100902139A patent/CN100363945C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100462911C (en) * | 2006-09-21 | 2009-02-18 | 北京北大方正电子有限公司 | Method for generating large plate lattice data and large plate lattice data senerating apparatus |
| CN101118592B (en) * | 2007-08-22 | 2011-07-20 | 大连理工大学 | Printers evidence obtaining method based on character printing feature |
| CN101518982B (en) * | 2008-02-29 | 2010-08-25 | 北大方正集团有限公司 | Method and equipment for printing images |
| CN101546384B (en) * | 2008-03-25 | 2013-03-06 | 富士施乐株式会社 | Print control apparatus, printing apparatus and print control method |
| CN101782896B (en) * | 2009-01-21 | 2011-11-30 | 汉王科技股份有限公司 | PDF character extraction method combined with OCR technology |
| CN102402497A (en) * | 2010-09-08 | 2012-04-04 | 北大方正集团有限公司 | Method and device for converting color portable document format (PDF) file into black and white PDF file |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100363945C (en) | 2008-01-23 |
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