CN1673887A

CN1673887A - Printing method for economizing carbon powder

Info

Publication number: CN1673887A
Application number: CN 200410029578
Authority: CN
Inventors: 周兴平
Original assignee: Destiny Technology Corp
Current assignee: Primax Electronics Ltd
Priority date: 2004-03-24
Filing date: 2004-03-24
Publication date: 2005-09-28
Anticipated expiration: 2024-03-24
Also published as: CN100354767C

Abstract

The carbon powder economizing printing method may print based on the pixel attribute. The carbon powder economizing printing method includes creating print page and recording the attributes of all the pixels in the page, extracting the pixel attribute of each pixel and regulating the carbon powder economizing mode based on the extracted pixel attribute, and printing based on the regulate result. The present invention can save carbon powder while emphasizing the edges of text and graph to ensure the overall print quality.

Description

Save the Method of printing of carbon dust

Technical field

The present invention relates to a kind of Method of printing, particularly relate to a kind of Method of printing of saving carbon dust.

Background technology

Printer is more and more accepted by numerous domestic consumers as a kind of extremely useful output device, and popularity rate also day by day improves.For black and white or color printer, it is very useful correctly printing specimen page and saving carbon dust as far as possible.And general print What comprises figure, literal, and three parts of image, from the angle of specimen page or rough draft, the print result of literal and figure only needs location aware and shape, and image is then relatively paid attention to content wherein.

The Method of printing of known saving carbon dust is that the raster image to whole page or leaf carries out bulk treatment a bit, comprise and change grating carbon dust data signal voltage, the point of continuous tone is Gamma (gamma) to be adjusted brightness and the image of shadow tone is made bitmap Mask (mask, shielding) etc., these methods all are with the image in the raster image, figure, literal is desalinated simultaneously, apparent in view to the treatment of picture effect, shortcoming is edge and the inside that can not treat literal and figure with a certain discrimination, because the print result of literal and figure only needs location aware and shape just passable, the user more is concerned about contour edge, profile inside can not want or lighter.

Also have the pixel of pair raster image to carry out boundary estimation in the known process method, method that it adopts boundary profile to detect can strengthen the edge of literal and figure effectively.Though this method can reach the effect of hollow literal and figure, poor for tone continuous images treatment effect, often make the distortion of continuous-tone image effect.This is because the part of image is enhanced, and another part is weakened, rather than whole thin out.

Summary of the invention

Technical matters to be solved by this invention provides a kind of Method of printing of saving carbon dust, solves the existing technology of carbon dust of saving for the poor problem of tone continuous images treatment effect.

For achieving the above object, the invention provides a kind of Method of printing of saving carbon dust, its characteristics are, distinguish printing according to pixel property, comprise the steps: to create printer page, write down the attribute of each pixel in this page simultaneously; Extract the attribute of this pixel; According to the attribute of this pixel, regulate carbon powder economizing mode; The result prints according to this adjusting.

The Method of printing of above-mentioned saving carbon dust, its characteristics are that described attribute comprises image, figure and literal.

The Method of printing of above-mentioned saving carbon dust, its characteristics are, described attribute according to this pixel, and the step of regulating carbon powder economizing mode further comprises: if the attribute of this pixel is an image, then reduces carbon dust and transmit pulse width; If the attribute of this pixel is a figure, then carries out edge contour and extract processing; If the attribute of this pixel is a literal, then carries out edge contour and extract processing.

The Method of printing of above-mentioned saving carbon dust, its characteristics are that described attribute as if this pixel is an image, then also comprises the step that variegates balance mode.

The Method of printing of above-mentioned saving carbon dust, its characteristics are that described edge contour extracts handles the consecutive point that comprise the steps: to extract this pixel; The attribute of the attribute of this pixel and these consecutive point relatively; According to this comparative result, with this pixel desalination.

The Method of printing of above-mentioned saving carbon dust, its characteristics are, also comprise the step of buffer memory pixel attribute.

Technique effect of the present invention is: the Method of printing of saving carbon dust of the present invention, for printer a solution is proposed, can accurately distinguish the attribute of each point, adopt different saving carbon dusts to handle to image, literal, figure, can emphasize literal, the edge of figure can keep the good result of overall image quality again.

Further describe specific embodiments of the invention below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the overview flow chart that the present invention saves the Method of printing of carbon dust;

Fig. 2 is the process flow diagram of first embodiment of the invention;

Fig. 3 is the process flow diagram that the present invention extracts figure and literal boundary profile;

The printing effect that Fig. 4 a～Fig. 4 c handles without the carbon of celebrating a festival for tradition; And

Fig. 5 a～Fig. 5 c handles printing effect afterwards for save carbon through the present invention.

Wherein, description of reference numerals is as follows:

Step 110 is created printer page, writes down the attribute of each pixel in this page simultaneously

Step 120 is extracted the attribute of this pixel

Step 130 is regulated carbon powder economizing mode according to the attribute of this pixel

Step 140 prints according to this adjusting

Step 210 is created grating attribute page cache

Step 220 is extracted the attribute of each point of attribute page cache

Which kind of attribute is step 230 judged as?

Step 240 attribute is figure or literal

Step 250 is extracted boundary profile

Step 260 attribute is an image

Step 270 is dwindled transmission carbon dust pulse width

Step 310 is extracted the consecutive point of current pixel point

The step 320 relatively attribute of this current vegetarian refreshments is adjacent a little attribute

Is step 330 attribute identical?

Step 340 is with this pixel desalination

Step 350 is normally printed

Embodiment

The present invention is a kind of Method of printing of saving carbon dust, and the attribute that can accurately distinguish each point is also realized the method for different saving carbon dusts on this basis to different impact points.At first by explanation system of the present invention among Fig. 1, this figure is the overview flow chart that the present invention saves the carbon dust Method of printing, is described as follows: step 110 at first, create printer page, write down the attribute of each pixel in this page simultaneously, wherein attribute comprises image, figure, literal etc.Step 120 is then extracted the attribute of this pixel; Step 130 according to the attribute of this pixel, is regulated carbon powder economizing mode again; Final step 140, the result prints according to this adjusting.

The present invention is described in detail to print to example with one-wavelength laser below.

See also Fig. 2, this figure is the process flow diagram of the embodiment of the invention.Raster image is preserved by page cache usually, and gray level image is preserved (each point can be 1,2,4,8) by the single-page buffer memory, and coloured image is preserved (four color separations of printing of four pages of CMYK by four page caches; Cyan green grass or young crops, the Magenta magenta, the Yellow Huang, black is black), each point can be 1,2,4,8.Usually each point all is made up of figure, literal, image in the raster image, owing to may cover mutually between figure, literal, the image, so can't know in the raster image certain point finally is which partly forms by figure, literal, image, therefore need in the plane record raster image every attribute (figure, literal or image), so could in final the processing, could handle accordingly according to the attribute of each point.

Step 210 at first, create grating attribute page cache, in the grating attribute page cache, can every every attribute in the expression grating page cache, if figure or word attribute, the attribute page cache fills 1, if image or other attribute, the attribute page cache fills 0, so just can do respectively literal, figure, image and handle.Can certainly be per every attribute in 2 expression grating page caches, 00 expression other, 01 expression literal, 10 presentation graphics, 11 presentation videos.Print module realizes saving carbon dust according to grating attribute page cache.During printing, step 220 is checked the attribute of each point of attribute page cache, is judged as which kind of attribute by step 230 then, if step 240 attribute is figure or literal, then execution in step 250 is carried out boundary profile detection processing, to reach the effect of hollow literal.Boundary profile detects and handles is exactly whether the four direction up and down of judging current point has with the attribute point, if four direction all has with the attribute point, then current point is the internal point of literal or figure, can omit or desalinate.If have at least on the four direction different attribute point is arranged on the direction, this point is the border of figure or literal, and the border is normally printed.If step 260 attribute is an image, then the gray-scale value of this point of execution in step 270 usefulness indexes and obtains corresponding PWPM signal print driving in Lookup Table (searching tabulation), transmit the carbon dust pulse width and dwindle processing, this moment, carbon dust absorption reduced, and the concentration of corresponding print image will be evenly thin out.

See also Fig. 3, this figure is the process flow diagram that the present invention extracts literal and graphic limit profile.At first step 310 is extracted the consecutive point of this pixel, consecutive point can be four pixels up and down, also can be eight pixels on every side, the attribute of this pixel of step 320 comparison and the attribute of these consecutive point if attribute is identical, illustrate that this pixel is the point of figure or literal inside then, therefore step 330 needs this pixel to be ignored or desalinated, if attribute is inequality, then step 350 is left intact, and normally prints.

When carrying out color laser printing, because the chromatic grating page cache has four planes of CMYK to produce point of per four bit representations in the page, wherein each page needs an attribute page cache, if every 1, represent that this point for figure or literal generation, is 0 and is image or other generation.Even four planes of CMYK generate simultaneously, also only need an attribute page caching record attribute information.Inspection is from every some attribute in the attribute page cache, if figure or word attribute, the attribute page cache fills 1, if image or other attribute, the attribute page cache fills 0.During printing, at first check the attribute of each point in the attribute page cache, if figure or word attribute, then carry out boundary profile and detect processing, to reach the effect of outline letters, if image attributes, then transmit the carbon dust pulse width and dwindle processing, variegate balance mode simultaneously, carbon dust absorption has reduced, and print image concentration will be evenly thin out.

Seeing also Fig. 4 a～Fig. 4 c is the printing effect of tradition without the carbon processing of celebrating a festival, and Fig. 5 a～Fig. 5 c handles printing effect afterwards for save carbon through the present invention.Wherein the pixel property of Fig. 4 a is an image, handles the back printing effect shown in Fig. 5 a through the present invention, and gradation of drop-out colour is evenly thin out as can be seen from Figure; The pixel property of Fig. 4 b and Fig. 4 c is respectively figure and literal, and shown in Fig. 5 b and Fig. 5 c, figure and literal all become hollow state to printing effect respectively after handling through the present invention.

The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Every according to equivalence variation and modification that the present invention did, all contained by claim of the present invention.

Claims

1, a kind of Method of printing of saving carbon dust is characterized in that, distinguishes printing according to pixel property, comprises the steps:

Create printer page, write down the attribute of each pixel in this page simultaneously;

Extract the attribute of this pixel;

According to the attribute of this pixel, regulate carbon powder economizing mode; And

The result prints according to this adjusting.

2, the Method of printing of saving carbon dust according to claim 1 is characterized in that, described attribute comprises image, figure and literal.

3, the Method of printing of saving carbon dust according to claim 1 is characterized in that, described attribute according to this pixel, and the step of regulating carbon powder economizing mode further comprises:

If the attribute of this pixel is an image, then reduces carbon dust and transmit pulse width;

If the attribute of this pixel is a figure, then carries out edge contour and extract processing; And

If the attribute of this pixel is a literal, then carries out edge contour and extract processing.

4, according to the Method of printing of claim 1,2 or 3 described saving carbon dusts, it is characterized in that, described if the attribute of this pixel is an image, then also comprise the step that variegates balance mode.

5, the Method of printing of saving carbon dust according to claim 3 is characterized in that, described edge contour extracts to handle and comprises the steps:

Extract the consecutive point of this pixel;

The attribute of the attribute of this pixel and these consecutive point relatively;

According to this comparative result, with this pixel desalination.

6, according to the Method of printing of claim 1,2 or 3 described saving carbon dusts, it is characterized in that, also comprise the step of buffer memory pixel attribute.