CN1224881A - System and method of printer image warping - Google Patents

Abstract

Method and apparatus facilitate alignment of a print image to a desired position. The print image includes a set of original linear groupings of pixels. A distortion of the print image is determined as compared to the desired position. Based on the determined distortion, a set of original linear groupings of pixels to warp is identified. A set of warped linear groupings of pixels is then generated, which correspond to the set of original groupings of pixels. A placement location in the print image for the warped linear groupings of pixels so generated is identified, and the print image is printed with the set of warped linear groupings of pixels.

Description

The system and method that is used for printer image warping

The present invention relates to the hybrid printer of two image prints on a piece of paper, specifically, the present invention can solve owing to the bad print quality problem that causes of the coincidence of second print image on first print image.

Hybrid printer is printed two images on a piece of paper.The hybrid printer of common pattern has merged laser and color ink jet printed on a piece of paper.On this printer, laser printer is printed the image of black on paper, then paper is transported to color printer, as ink-jet printer, prints colour (CMY) part of image here.The print quality problem of the maximum that this process causes is because the black of image and the correct alignment of chrominance section shortage cause.No matter when with the black plane of image in the horizontal direction or vertical direction expansion or compression, it is bad that the color plane of Da Yining always demonstrates coincidence subsequently.

The distortion of black plane picture is that some print procedure is intrinsic, and does not change with the different printers of model of the same race.The distortion that these printers are recorded remained unchanged in the whole life-span of printer.Many factors in the laser printing process for example optical characteristics of velocity variations, humidity and the laser system of heat, paper have caused the distortion on black plane.Distortion may be in level and vertical direction, also may be linear or nonlinear, also may be in two processes.If distortion is identified and measures, just can be predicted and may put and cover or hide.

The mankind's eyes are to detect less than being present in distortion in the laser process when only printing black white image.But, undistorted or have an image of different distortions when another, coloured image for example, when being printed on black white image top, the distortion of black white image has just become obviously.Therefore, can not on hardware, take effective method to revise the distortion of laser printer.The present invention has satisfied without hardware also can cover or hide the needs of the distortion of black and white plane picture.

The present invention relates to a kind of apparatus and method that are used for image calibration that printer is printed to ideal position.

A method of the present invention comprises step: the distortion of definite print image of comparing with ideal position; According to determined distortion, identify one group of initial linear pixel group so that distortion; Produce the linear pixel group of one group of distortion corresponding to the initial linear pixel group of this group; The placement location of the linear pixel group of the distortion that identification is produced on print image; And the linear pixel group that is out of shape with this group prints print image.

Other method of the present invention is to be used for making second print image of many linear pixel groups and to have first print image of corresponding many linear pixel groups to aim at, and wherein first printer produces first print image and second printer produces second print image.This method comprises step: the distortion of determining first print image is discerned one group of linear pixel group so that distortion according to determined distortion from second print image; This each linear pixel group of organizing linear pixel group is produced the linear pixel group of a distortion; For the linear pixel group of the distortion that each produced identifies placement location in second print image; And the linear pixel group that prints second each distortion of print image is aimed at each corresponding linear pixel group of first print image.

Preferred imaging device of the present invention comprises: first printer of printing first print image on a piece of paper; On a piece of paper, print second printer of second print image; With the image processor that covers the first print image distortion.This image processor comprises the device of the distortion of determining first print image; Discern the device of one group of initial linear pixel group of second print image with distortion according to the distortion of first print image; Generation is corresponding to the device of the pixel group of the distortion of each initial linear pixel group of the initial linear pixel group of this group; The device of the placement location of the linear pixel group of each distortion that identification is produced; Place the device of the linear pixel of each distortion in corresponding position.

Other features and advantages of the present invention can be below the present invention figure and describe in detail obtain.Fig. 1 is a block scheme of carrying out system of the present invention.Fig. 2 is the process flow diagram of the algorithm when not increasing or delete linear pixel group (for example a slice).Fig. 3 is a process flow diagram of having deleted the algorithm of a linear pixel group (for example a slice).Fig. 4 is the process flow diagram that has increased the algorithm of a linear pixel group (for example a slice).

The invention provides a kind of system and method that print image is simulated another printed drawings distortion of informed image that is out of shape. This can make print image present appropriate aligning.

The present invention also provides a kind of two system and methods that print processing is aligned that can make the pixel misalignment. But, be laser printing process and the second print procedure is ink jet printing process for the ease of the first print procedure of understanding this application indication. In addition, the present invention has also described and has been out of shape the distortion that the second print procedure comes emulation the first print procedure. Notice that two all print procedures can be out of shape to simulate all distortions that record.

One laser printer can be used at the black plane picture of a piece of paper formation one detection usefulness. This black plan view image can scan to measure the position of picture point on the paper or with manually measuring. Distortion or picture point are measured by the degree of incorrect placement on printing paper. From the distortion that records, form the intrinsic linear or nonlinear errors table of an expression print procedure.

Form errors table to quantize any black plan view image in the horizontal direction and/or the distortion of vertical direction. Afterwards, before these images were sent to color image forming apparatus, these errors tables were used for the color plane (CMY) of coloured image similarly is out of shape.

The distortion of coloured image is by formation synthesizing linear pixel group, or pixel is carried out.Such linear group can be the form of a single pixel column (for example one scan row) or a vertical pixel column (for example a slice).Pixel is the abbreviation of normal image element.Pixel is used for forming a single point of image on a piece of paper page or leaf.For example, if print the image that 600 picture points are arranged on the per inch, a picture point in pixel image be one inch 1/600.Typical print image is that the pixel region by one or more rectangles forms.In general print system, this graphical representation is in the storer of printer, so that each pixel is expressed as one of storer.Therefore, each pixel has two states: Kai Heguan.

There are two kinds of situations to facilitate and form the synthesizing linear pixel group.The first, for example, errors table can indicate between sheet n and sheet n+1 must increase by a new sheet.New sheet can be synthetic by adjacent sheet, for example sheet n and sheet n+1.The second, for example, errors table can indicate must deletion sheet n.Substitute the sheet n that deletion fully may produce artefact, produce a new sheet to replace sheet n and sheet n+1.The sheet that should substitute is the synthetic of sheet n and sheet n+1.

Synthetic linear pixel group (sheet or scan line) n and n+1 can by to linear pixel group n and linear pixel group n+1 actuating logic " or " or logical produce.Logical "or" or logical keep the image information from two row that will synthesize.But, follow many look dither techniques, this may produce on page and should be uniform colour and look unfavorable that the visual artefact of bright or dark striped is arranged.

Performance of the present invention can strengthen by the process of " noise ordered dithering " by name.Use noise arrangement vibrotechnique when in the printer image processor, producing image at first, therefore when forming the synthesizing linear pixel group, artefact has been reduced to minimum.Vibration is to produce colored method by arranging pixel group.Technology has geometric configuration and rule usually very much in order, so any interruption in the pattern (for example because the result of synthesizing linear pixel group) is all very obvious.When using " noise arrangement " vibrotechnique, beginning to produce the geometric scheme that does not have rule in the colored process, therefore, the synthesizing linear pixel group becomes not obvious to human eye.In case by utilizing the synthesizing linear pixel group that the color plane image is out of shape, this image just is sent to color image forming apparatus.

To be described in detail below a preferred embodiment of the present invention.Referring to accompanying drawing, be shown in components identical and/or step in the whole view with same label list.

The generation of the table of measured distortion

In Fig. 1, printer system 10 comprises image processor 14 and two print procedures that are designated as processing 1 and processing 2 18, and image processor obtains data and converts thereof into the binary picture of delivering to print processing 16 and 18 from user application.The raster image processor (RIP controller) that image processor may be Lexmark.Handle one 16 and to handle 2 18 may be the print engine for example laser print engine and the ink jet print engine of any kind.In the present embodiment, the passage of processing 1 with the paper of processing 2 18 can be connected.Just, in case handle 1 on paper print image, handle 2 18 delivering to a piece of paper.If do not connect the passage of the paper of two print processing 16 and 18, the user can manually fail paper to one printer will be defeated by another printer with a piece of paper then.

Present embodiment described below is the view data sheet of sheet orientation.But those skilled in the art will appreciate that the present invention also is applied to the view data of scan line orientation.In the present embodiment, any sampled distance along the horizontal direction size of an image can utilize for example 0.25 inch sampled distance.In order to measure level distortion, vertical plate prints on selected sampled distance with handling 1.Print each vertical plate with the density of single pixel, and expectation is just in time printed sheet at a distance of 0.25 inch.In case printed the vertical plate pattern, then can measure the distance between the vertical plate of adjacent printing.One optical scanner is used for measuring the distance between adjacent printing vertical plate.Desired locations and the difference between actual measurement location with each sheet is put in the table as shown in table 1 afterwards, and the name of this table is called: the sample table of measured distortion on the horizontal direction size.Table 1 is the print procedure that is used to print image that 600 picture points are arranged on each inch.Note, if the measuring vertical distortion, stamping ink horizontal line and carry out same measurement then, and also the position of measuring is placed on the sample table of representing the measured distortion of vertical direction.To each print processing 16 or 18, can produce a lateral error table and/or a vertical error table.

Horizontal level (inch)	Lateral error (600 dpi pixel)
		????0.25	????0
????0.5	????-4.15
		????0.75	????-4.92
????1.0	????-4.99
		????1.25	????-4.47
????1.5	????-3.85
		????1.75	????-3.19
????2.0	????-2.64
		????2.25	????-2.33
????2.5	????-2.10
		????2.75	????-2.11
????3.0	????-2.25
		????3.25	????-2.58
????3.5	????-3.09
		????3.75	????-3.88
????4.0	????-4.81
		????4.25	????-5.81
????4.5	????-6.76
		????4.75	????-7.43
????5.0	????-7.92
		????5.25	????-8.15
????5.5	????-8.15
		????5.75	????-7.90
????6.0	????-7.51
		????6.25	????-6.84
????6.5	????-5.90
		????6.75	????-4.71
????7.0	????-3.40
		????7.25	????-2.01
????7.5	????-0.88
		????7.75	????-0.06
????8.0	????-0.28

Table 1: the sample table of measured in the horizontal direction distortion

In above table 1, first row are represented the distance on the left side of page, print each vertical plate in this distance, and this distance has represented that also the vertical plate in the printer page table shows is represented the position before being sent to actual printer.For example, should be at actual 4.15 the pixel places, left side, 0.5 inch position of distance that are printed on of the vertical plate of the 0.5 inch printing in the left side of distance paper.Because error is a unit with the pixel, on the position of 0.5 inch-4.15/600 inch of the vertical plate that in fact is printed or 0.49308 inch on the left side of distance paper.Because the discrete expression of image can be printed machine control, so the margin of error is represented with pixel.

In order to produce errors table, for example be called the table 2 of example errors table, error measuring value from each vertical plate is input in the table, first row contain the location of pixels of image in the table, secondary series contains the measured margin of error (described in table 1) and the 3rd classifies the linear interpolation of the rounding of the margin of error as, for the generation of the described errors table of easy to understand table 2, suppose that printing is that 40 picture points (dpi) are arranged on the per inch.The example of errors table is as follows:

Horizontal pixel location in the image	By the measured error of table 1	The linear interpolation of the rounding of each pixel place error measuring value
			????0	????0	????0
????1	????0	????0
			????2	????0	????0
????3	????0	????0
			????4	????0	????0
????5	????0	????0
			????6	????0	????0
????7	????0	????0
			????8	????0	????0
????9????1/4inch	????0	????0
			????10	????0	????0(-0.415)
????11	????0	????-1(-0.83)
			????12	????0	????-1(-1.245)
????13	????0	????-2(-1.66)
			????14	????0	????-2(-2.075)
????15	????0	????-2(-2.49)
			????16	????0	????-3(-2.905)

Horizontal pixel location in the image	By the measured error of table 1	The linear interpolation of the rounding of each pixel place error measuring value
			????17	????0	????-3(-3.32)
????18	????0	????-4(-3.735)
			????19?1/2inch	????-4.15	????-4
????20	????0	????-4
			????21	????0	????-4
????22	????0	????-4
			????23	????0	????-4
????24	????0	????-5
			????25	????0	????-5
????26	????0	????-5
			????27	????0	????-5
????28	????0	????-5
			????29?3/4inch	????-4.92	????-5
????30	????0	????-5
			????31	????0	????-5
????32	????0	????-5
			????33	????0	????-5
????34	????0	????-5
			????35	????0	????-5
????36	????0	????-5
			????37	????0	????-5
????38	????0	????-5
			????39?1?inch	????-4.99	????-5

Table 2: sampling error table

As shown in table 2, the picture point of the 40dpi that horizontal direction is adjacent on the page in the 1st row of table 2 is numbered 0 to 39.The margin of error of representing with pixel of the 2nd row is from the error magnitude of the measured pixel of the 2nd row of table 1.The 3rd row of table 2 contain the error linear interpolation on each measurement range, and this value has been passed through rounding.For example, referring to the 3rd row of table 2, be 0 and be-4.15 in the error of the 19th pixel at 0.5 inch place in the error of the 9th pixel at 0.25 inch place.Error 4.15 is to expand to pixel 19 with 0.415 increment from pixel 9.What table 2 showed in bracket is the actual margin of error, and on the left of the parenthesis is the rounding value.

In a preferred embodiment, errors table dynamically produces as required data.In other embodiments, errors table in case produce just be kept in the storer supply and demand will the time choose.

Produce the answer print of coloured image according to the total data of errors table as shown in table 2.Basically have three kinds of possible situations to occur: (1) does not need the data of answer print and this sheet in statu quo to duplicate; (2) must between sheet n and n+1, increase new sheet; And (3) must deletion sheet n.Every kind of situation that may occur is below described.

The distortion of color image

Table 3 is by name: the anamorphose example that the expression sheet is eliminated comprises that the 1st of table 2 is listed as and the horizontal pixel location of the 2nd row and error project, the initial data of the 3rd row, the view data of the distortion (distortion) in the 4th row and the understandable note in the 5th row.Initial picture data are any part of image, the text that will print or white space.In example, in each initial picture data, deposit special data, so that the end position of observed data in the distortion picture.Notice that when location of pixels contains " 1 ", ink powder or ink will be placed on the relevant position of page.If locations of pixels contains " 0 ", on page, just there are not ink powder and ink.

Horizontal pixel location	The errors table project	Initial sheet pictorial data byte 0 byte 1	Distortion sheet pictorial data byte 0 byte 1	Deformation data is explained
					????0	????0	?00000000?00000000	?00000000?00000000	Initial data 0
????1	????0	?00000000?00000001	?00000000?00000001	Initial data 1
					????2	????0	?00000000?00000010	?00000000?00000010	Initial data 2
????3	????0	?00000000?00000011	?00000000?00000011	Initial data 3
					????4	????0	?00000000?00000100	?00000000?00000100	Initial data 4
????5	????0	?00000000?00000101	?00000000?00000101	Initial data 5
					????6	????0	?00000000?00000110	?00000000?00000110	Initial data 6
????7	????0	?00000000?00000111	?00000000?00000111	Initial data 7
					????8	????0	?00000000?00001000	?00000000?00001000	Initial data 8
????9	????0	?00000000?00001001	?00000000?00001001	Initial data 9
					????10	????0	?00000000?00000000	?01010101?10101010	Synthetic 10 and 11
????11	????-1	?11111111?11111111	?01010101?10101010	Synthetic 12 and 13
					????12	????-1	?00000000?00000000	?00000000?00001110	Initial data 14
????13	????-2	?11111111?11111111	?01010101?10101010	Synthetic 15 and 16
					????14	????-2	?00000000?00001110	?01010101?10101010	Synthetic 17 and 18
????15	????2	?00000000?00000000	?00000000?00010011	Initial data 19
					????16	????-3	?11111111?11111111	?00000000?00010100	Initial data 20
????17	????-3	?00000000?00000000	?00000000?00010101	Initial data 21
					????18	????-4	?11111111?11111111	?00000000?00010110	Initial data 22
????19	????-4	?00000000?00010011	?01010101?10101010	Synthetic 23 and 24
					????20	????-4	?00000000?00010100	?00000000?00011001	Initial data 25
????21	????-4	?00000000?00010101	?00000000?00011010	Initial data 26
					????22	????-4	?00000000?00010110	?00000000?00011011	Initial data 27
????23	????-4	?00000000?00000000	?00000000?00011100	Initial data 28
					????24	????-5	?11111111?11111111	?00000000?00011101	Initial data 29
????25	????-5	?00000000?00011001	?00000000?00011110	Initial data 30
					????26	????-5	?00000000?00011010	?00000000?00011111	Initial data 31
????27	????-5	?00000000?00011011	?00000000?00100000	Initial data 32
					????28	????-5	?00000000?00011100	?00000000?00100001	Initial data 33
????29	????-5	?00000000?00011101	?00000000?00100010	Initial data 34
					????30	????-5	?00000000?00011110	?00000000?00100011	Initial data 35
????31	????-5	?00000000?00011111	?00000000?00100100	Initial data 36
					????32	????-5	?00000000?00100000	?00000000?00100101	Initial data 37
????33	????-5	?00000000?00100001	?00000000?00100110	Initial data 38
					????34	????-5	?00000000?00100010	?00000000?00100111	Initial data 39
????35	????-5	?00000000?00100011
					????36	????-5	?00000000?00100100
????37	????-5	?00000000?00100101
					????38	????-5	?00000000?00100110
????39	????-5	?00000000?00100111

Table 3: the anamorphose example that the expression sheet is eliminated

Provide the project of table 3 error scale and the initial picture data of table 3, colour print is handled as follows and is changed.Left margin that calculating makes new advances and new right margin quilt.In this example, because print with 40 picture points of per inch, then old left margin is 0 and old right margin is 39.Be calculated as follows:

New left margin=old left margin+errors table [old left margin]=0+0=0

New right margin=old right margin+errors table [old right margin]=39-5=34

Because new right margin is 34, image processor must be printed 40 on 35 data space.This means and to produce several answer prints.

From the transformation of data of initial picture data buffer in distortion picture data buffer.Three counters have been utilized.Position in the initial picture data buffer of original position counter keeps track, next deformation position counter is the position that is placed on the next sheet in the deformation pattern data buffer.Last deformation position counter is the position that is placed on last sheet in the deformation pattern data buffer.

Next, first sheet of initial picture data be copied in the distortion picture data buffer and also last deformation position to be initialized to new left margin be 0.To old right margin, following formula tells our view data is how to be moved to distortion picture data buffer from initial picture data buffer to each horizontal original position from old left margin+1 now.

The step false code

[210] next deformation position=initial position+error [original position]

Now next deformation position counter and last deformation position are compared to determine whether must produce answer print or whether the data of initial picture data buffer be moved on in the distortion picture data buffer with chapter and verse.Three kinds of possibilities are arranged: (1) data can directly be duplicated; (2) need remove a slice; (3) need to increase a slice.

Referring now to Fig. 2-4, process of the present invention is described.Notice that initial impact damper refers to the data in the initial picture data buffer, the distortion impact damper refers to the data in the distortion picture data buffer.

A. there is not sheet to produce

Referring to Fig. 2, next deformation position counter is calculated as original position+error [original position] in step 210.In step 220,, needn't produce answer print so if next deformation position is bigger by 1 than last deformation position.In step 230 in this case, the data in the initial picture data buffer are copied in the distortion sheet data buffer, be moved to next deformation position in the last deformation position of step 240, and in step 250, initial position increase.In step 260, whether all decision data all processed.If it is processed that all data do not have, algorithm proceeds to 210 steps to carry out.But if all data processing finish, process just finishes.

The step false code

[210] next deformation position=original position+error [original position];

[220] if next deformation position=last deformation position+1

[230] data are copied to distortion impact damper [next deformation position] from initial impact damper [original position];

[240] last deformation position=next deformation position;

[250] original position ++;

It below is the example iteration of the errors table shown in the employing table 3.

Iteration 1

Initial position is 1;

Last deformation position is 0;

Next deformation position=1+ error [1]; Next deformation position of/* be 1*/

Because next deformation position=last deformation position+1 does not have answer print;

The data of initial impact damper [1] are copied to distortion impact damper [1];

Last deformation position=next deformation position; The last deformation position of/* obtain 1*/

Original position is increased to 2.

Iteration 2

Initial position 2;

Last deformation position is 1;

Next deformation position=2+ error [2]; Next deformation position of/* be 2*/

Because next deformation position=last deformation position+1 does not have answer print;

The data of initial impact damper [2] are copied to distortion impact damper [2];

Last deformation position=next deformation position; The last deformation position of/* obtain 2*/

Initial position is increased to.3

Iteration 10

Initial position is 10

Last deformation position is 9;

Next deformation position=10+ error [10]; Next deformation position of/* be 10*/

Because next deformation position=last deformation position+1 does not have answer print;

The data of initial impact damper [10] are copied to distortion impact damper [10];

Last deformation position=next deformation position; The last deformation position of/* obtain 10*/

Initial position is increased to 11.

B. the deletion of sheet

If the result of step 220 is "No", then process is proceeded in step 310 as described in Figure 3.If next deformation position equals last deformation position in step 310, in initial picture data buffer, there are two vertical plates must occupy the same position that is out of shape in the picture data buffer.In this case, in step 330, just produce an answer print.This answer print is placed in [last deformation position] and original position increase in step 350 in the distortion impact damper in step 340.Afterwards, then process is proceeded in the step 260 of Fig. 2.

The step false code

[310] if next deformation position=last deformation position;

[330] produce initial impact damper [original position] and initial impact damper [original position-1]

Answer print;

[340] answer print is put into distortion impact damper [last deformation position] and replaces original data;

[350] initial position ++;

Following generation one answer print:

// specify some memory buffer units to represent the vertical data sheet of being discussed

Character sheet A[vertical plate size];

Character sheet B[vertical plate size];

Character answer print [vertical plate size];

// to each byte of vertical plate data, take a sample two from synthetic byte

// introduce " randomness " according to even byte and odd byte change sampling method

To each byte in the sheet (0 to vertical plate size-1)

(if byte is located in the odd address)

Synthetic [byte]=(sheet A[byte] logical 0 * AA)

Logical "or" (sheet B[byte] logical 0 * 55) in addition then

Synthetic [byte]=(sheet A[byte] logical 0 * 55)

Logical "or"

(sheet B[byte] logical 0 * AA)

It below is the example iteration of utilizing the errors table shown in the table 3.In this example, be 11 just to produce answer print up to original position.Attention is out of shape impact damper [11] and obtains data from initial impact damper [12] in iteration 12, and is out of shape the answer print rewriting of the data of impact damper [11] by initial impact damper [12] and initial impact damper [13] in iteration 13.

Iteration 11

Original position is 11;

Last deformation position is 10;

Next deformation position=11+ error [11]; Next deformation position of/* be 10*/

Because next deformation position=last deformation position produces an answer print;

Produce the answer print of initial impact damper [11] and initial impact damper [10];

Answer print is put in the distortion impact damper [10];

Original position is increased to 12.

Iteration 12

Original position is 12;

Last deformation position is 10;

Next deformation position=12+ error [12]; Next deformation position of/* be 11*/

Because next deformation position=last deformation position+1 does not have answer print;

The data of initial impact damper [12] are copied to distortion impact damper [11];

Last deformation position=last deformation position of next deformation position/* obtain 11*/

Initial position is increased to 13.

Iteration 13

Initial position is 13;

Last deformation position is 11;

Next deformation position=13+ error [13]; Next deformation position of/* be 11*/

Because next deformation position=last deformation position produces an answer print;

Produce the answer print of initial impact damper [13] and initial impact damper [12];

Answer print is put in the distortion impact damper [11];

Initial position is increased to 14.

C. the increase of sheet

If the result of step 310 is "No", handle then that press table 4 described in step 410 continuation, wherein, next deformation position than last deformation position greatly more than 1 position.Therefore, two vertical plates that separated by a location of pixels in distortion picture data buffer are arranged in initial picture data buffer.One answer print is added into so that artefact reduces to minimum.Produce this answer print in step 410.In step 420, last deformation position increases and in step 430 answer print is put into distortion impact damper [next deformation position].In step 440, the data of initial impact damper [original position] copy to distortion impact damper [last deformation position].In step 450, last deformation position is set to next deformation position and increases in step 460 original position.Afterwards, process is pressed step 260 continuation of Fig. 2.

The step false code

[410] generate initial impact damper [original position] and initial impact damper [original position-1]

Answer print

[420] last deformation position ++

[430] answer print is put into distortion impact damper [last deformation position];

[440] data are copied to distortion impact damper [next deformation position] from initial impact damper [original position];

[450] last deformation position=next deformation position;

[460] original position ++;

By name below this situation occurs in: as to show in the table 4 of the anamorphose example that increases sheet.The form of table 4 is the same with table 3.

Horizontal pixel location	The errors table project	Initial picture data byte 0 byte 1	Picture data byte 0 byte 1 of distortion	The data notes of distortion
					????0	????0	?00000000?00000000	?00000000?00000000	Initial data 0
????1	????0	?00000000?00000000	?00000000?00000000	Initial data 1
					????2	????1	?11111111?11111111	?01010101?10101010	Synthetic 1 ﹠ 2
????3	????1	?00000000?00000011	?11111111?11111111	Initial data 2
					????4	????1	?00000000?00000100	?00000000?00000011	Initial data 3
????5			?00000000?00000100	Initial data 4

Table 4: the anamorphose example that the expression sheet increases

Iteration 2

Original position is 2;

Last deformation position is 1;

Next deformation position=2+ error [2]; Next deformation position of/* be 3*/

Because next deformation position＞last deformation position+1 produces answer print;

Produce the answer print of initial impact damper [2] and initial impact damper [1];

Last deformation position ++; The last deformation position of/* be 2*/

This answer print is placed in the distortion impact damper [2];

The data of initial impact damper [2] are copied to distortion impact damper [3];

Last deformation position=next deformation position; The last deformation position of/* obtain 3*/

Initial position is increased to 3.

Iteration 3

Original position is 3;

Last deformation position is 3;

Next deformation position=3+ error [3]; Next deformation position of/* be 4*/

Because next deformation position=last deformation position+1 does not have answer print;

The data of initial impact damper [3] are copied to distortion impact damper [4];

Last deformation position=next deformation position; The last deformation position of/* be 4*/

Original position is increased to 4.

Same algorithm application is in be out of shape coloured image on vertical dimension.

The present invention is used for the distortion of two print images

When description the present invention was used for covering the distortion of first print image, the present invention also can be used for covering the distortion of one or two print image.Several situations are arranged here:

A. situation 1:

Situation 1 is to describe in detail to handle one 16 detection print images that constitute.The print image of print processing 1 does not have the shifting ground and is printed.Produced one with perfect print processing the errors table of this detection print image distortion relatively the time.Handle image that 2 18 second print processing produced according to being out of shape with the measured distortion of algorithm described above.

B. situation 2

A detected image forms by handling 1 in situation 2, and uses this first print image of print processing 1 any distortion to be printed.One detected image of second print processing is printed with handling 2 18.Produced one and handle distortion table between the detection print image of 2 18 detection print image processing 1 relatively.Subsequently, be out of shape according to measured distortion by handling 2 18 images of printing.

C. situation 3

Situation 3 distortion first print image makes its " perfection " and according to " perfection " anamorphose second print image of first print processing.It is finished as follows.Print a detection print image with handling 1.Produce an errors table with the distortion of complete print image detection print image relatively.All be out of shape by handling one 16 detection print images of printing and real image according to the distortion that records.Adopt and handle a detection of 2 18 printings print image.Produce other with handle 1 be out of shape the detected image comparison time handle the errors table of the distortion of 2 18 detection print image.Be out of shape according to this second measurement distortion by handling 2 18 images of printing.

Above situation has provided how to use example of the present invention.It should be noted that and always must not produce errors table to let drive at watermark image well.Equally, can measure the distortion that records that is used for producing errors table so that introduce distortion.Afterwards, the distortion table of second print image can produce by the distortion of measurement with second print image of the first print image comparison of distortion.

With reference to the preferred embodiments of the present invention the present invention is described in detail, those skilled in the art can carry out its distortion and modification under the situation of claim protection domain below not exceeding and spirit.

Claims (18)

1, a kind of print image is corrected to the method for ideal position, this print image comprises one group of initial linear pixel group, and wherein a printer produces this print image, may further comprise the steps:

A) determine and the distortion of ideal position print image relatively;

B), discern one group of initial linear pixel group and be out of shape according to determined distortion;

C) produce one group of linear pixel group that is out of shape corresponding to described one group of initial linear pixel group;

D) riding position of linear pixel group in print image of definite described distortion that is produced; With

E) be out of shape linear pixel group with described one group and print described print image.

2, method as claimed in claim 1, wherein said one group is out of shape linear pixel group and comprises a synthesizing linear pixel group at least.

3, the method for one second print image of one first print image correction of a kind of usefulness, this second print image comprises a plurality of linear pixel groups, this first print image comprises a plurality of corresponding a plurality of linear pixel groups, one of them first printer produces first print image and second printer produces second print image, may further comprise the steps:

A) determine the distortion of first print image

B), determine that from second print image one group of linear pixel group is out of shape according to determined distortion;

C) produce the linear pixel group that has been out of shape for this each linear group of organizing linear pixel group;

D) the linear pixel group that each that is produced has been out of shape is determined the riding position in second print image; With

E) with each corresponding to the distortion of the levelling of each linear pixel group of described first print image linear pixel group print this second print image.

4, method as claimed in claim 3, wherein said one group is out of shape linear pixel group and comprises a synthesizing linear pixel group at least.

5, a kind of imaging device comprises:

First printer of on page, printing first print image;

Second printer of on page, printing second print image; With

An image processor that is used for covering the distortion of first print image, it comprises:

ⅰ) determine the device of the first print image distortion;

ⅱ) the device of one group of linear pixel group to be out of shape of identification second print image according to the distortion of first print image;

ⅲ) produce device corresponding to the linear pixel group of the distortion of each linear pixel group of initial linear pixel group;

ⅳ) determine to be produced described each be out of shape the device of the riding position of linear pixel group; With

ⅴ) place the device of the linear pixel group of described distortion to corresponding position.

6, device as claimed in claim 5, wherein first printer is a laser printer.

7, device as claimed in claim 6, wherein second printer is an ink-jet printer.

8, device as claimed in claim 5 determines that wherein device comprises the processor that produces errors table.

9, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous sheet n and sheet n+1, and the device that produces the linear pixel group of distortion comprises that one carries out the logical "or" computing and produces the processor of synthetic pixel group between sheet n and sheet n+1.

10, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous sheet n and sheet n+1, and the device of the linear pixel group of generation distortion comprises that one carries out the processor of the synthetic pixel group of generation of logical between sheet n and sheet n+1.

11, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous sheet n and sheet n+1, and produces the processor that the device that is out of shape linear pixel group comprises the synthetic pixel group of a generation:

Actuating logic between sheet n and binary sequence " with ";

Actuating logic between sheet n+1 and described binary sequence " with "; With

Actuating logic OR operation between the result of above step (a) and step (b).

12, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous sheet n and n+1, and the linear picture group's of generation distortion device comprises the processor of the synthetic pixel group of a generation:

Actuating logic AND-operation between the hexadecimal 55AA of sheet n and repetition binary sequence.

Actuating logic AND-operation between the hexadecimal AA55 of sheet n+1 and repetition binary sequence; With

Actuating logic OR operation between the result of above step (a) and step (b).

13, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous scan line n and scan line n+1, and the device of the linear pixel group of generation distortion comprises that one carries out the processor of the synthetic pixel group of generation of OR operation between scan line n and scan line n+1.

14, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous scan line n and scan line n+1, and the device of the linear pixel group of generation distortion comprises that one carries out the processor of the synthetic pixel group of generation of AND-operation between scan line n and scan line n+1.

15, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous scan line n and scan line n+1, and produces the processor that the device that is out of shape linear pixel group comprises the synthetic pixel group of a generation:

Actuating logic AND-operation between scan line n and binary sequence;

Actuating logic AND-operation between scan line n+1 and described binary sequence; With

Actuating logic OR operation between the result of above step (a) and step (b).

16, device as claimed in claim 5, wherein the initial linear pixel group of this group comprises continuous scan line n and n+1, and produces the processor that the device that is out of shape linear pixel group comprises the synthetic pixel group of a generation, that is:

Actuating logic AND-operation between the hexadecimal 55AA of scan line n and repetition binary sequence;

Actuating logic AND-operation between the hexadecimal AA55 of scan line n+1 and repetition binary sequence;

Actuating logic OR operation between the result of above step (a) and step (b).

17, device as claimed in claim 5, wherein each described linear pixel group is a pixel sheet.

18, device as claimed in claim 5, wherein said linear pixel group are that a picture element scan is capable.

Images