CN1215700C - Automatic correction method - Google Patents

Abstract

The present invention relates to an automatic correction method which is suitable for a personal computer connected with a list printer and a scanner or a multifunctional business machine having a printing function and an image scanning function. The method comprises the following steps that a correction manuscript is printed, and the image of the correction manuscript is scanned, so that a digital image of the correction manuscript is obtained; analysis processing is carried out for the digital image to obtain a comparatively optimal correcting and adjusting parameter, and the comparatively optimal correcting and adjusting parameter is used for adjusting. Thus, the automatic correction of the printing function of the multifunctional business machine is completed.

Description

Automatically bearing calibration

Technical field

The present invention relates to a kind of automatic bearing calibration, particularly relate to a kind of automatic bearing calibration that is applicable on PC that is connected with printer and scanner or the multifunctional paper feeding machine that has printing function and image scanning function simultaneously.

Background technology

Fast development along with the PC industry, various computer peripheral device is also weeded out the old and bring forth the new thereupon, wherein printer (printer) and image scanner (scanner) little by little become most of people's indispensable peripheral equipment especially, and it is integrated into a multifunctional paper feeding machine, become the favorite of personal work chamber and small office especially.And present printer, especially a required alignment (alignment) action of carrying out of ink-jet printer, be to make this printer prints go out an alignment original copy (as shown in Figure 1), and utilize of the observation of user's naked eyes to this alignment original copy, and then select preferable adjustment parameter, with Fig. 1 example, the preferably is 4, the back is manually imported in the PC, changes this printer prints parameter by this, and the action that can reach alignment (alignment).

Summary of the invention

Because existing alignment action need utilize the observation of user's naked eyes and manual input, therefore have operation inconvenience and proofread and correct the instability quality defective, main purpose of the present invention is to provide a kind of automatic bearing calibration, make that it is easy and simple to handle, quality improves and certain rapidly can be from the dynamic(al) correction printer.

The objective of the invention is to realize by following technical scheme.

The invention provides a kind of automatic bearing calibration, be applicable on the multifunctional paper feeding machine, this multifunctional paper feeding machine provides one and prints a function and an image scanning function, and this method comprises the following step: print one and proofread and correct original copy, this correction original copy has a plurality of alignment line segments; This correction original copy is carried out image scan, and then obtain a digitized video of this correction original copy; Carry out an interval location to define an alignment interval to comprising those alignment line segments in this digitized video; To those alignment line segments in this alignment interval, obtain corresponding a plurality of regression straight lines respectively; Those regression straight lines are carried out an adaptation analysis to select the regression straight line of adaptation maximum, adjust parameter to obtain a preferable correction; And, utilize this preferable correction to adjust parameter and adjust, so finish printing function in this multifunctional paper feeding machine from dynamic(al) correction.

Purpose of the present invention also can further be realized by following technical measures.

Aforementioned automatic bearing calibration, this correction original copy is to be an alignment original copy in the bearing calibration automatically, and has two anchor points on this alignment original copy at least.

Aforementioned automatic bearing calibration further comprises step in the bearing calibration automatically: calculate an angle of inclination according to these two the positioning point coordinate values in this digitized video, use during for this location, interval.

The present invention also provides a kind of automatic bearing calibration, be applicable on the printer, this printer is electrically connected to a PC, and this PC is electrically connected with an image scanner, this method comprises the following step: make this printer prints go out one and proofread and correct original copy, this correction original copy has a plurality of alignment line segments; This image scanner is scanned this correction original copy, and then obtain a digitized video of this correction original copy; Carry out an interval location to define an alignment interval to comprising those alignment line segments in this digitized video; To those alignment line segments in this alignment interval, obtain corresponding a plurality of regression straight lines respectively; Those regression straight lines are carried out an adaptation analysis to select the regression straight line of adaptation maximum, adjust parameter to obtain a preferable correction; And, make this preferable correction of this PC utilization adjust parameter this printer adjusted, so finish this printer from dynamic(al) correction.

Purpose of the present invention also can further be realized by following technical measures.

Aforementioned automatic bearing calibration, this correction original copy is to be an alignment original copy in the bearing calibration automatically, and has two anchor points on this alignment original copy at least.

Aforementioned automatic bearing calibration further comprises step in the bearing calibration automatically: calculate an angle of inclination according to these two the positioning point coordinate values in this digitized video, use during for this location, interval.

The present invention compared with prior art has tangible advantage and effect thereof.

The automatic bearing calibration that the present invention finished, need not utilize the observation of user's naked eyes to carry out manual parameter input again, therefore improved in the existing method operation inconvenience and proofreaied and correct the instability quality defective, so develop one easy and simple to handle, quality improves and certain printer aligning means rapidly.

Description of drawings

Fig. 1 is that existing printer prints an alignment original copy exemplary plot;

Fig. 2 is that the present invention develops and the hardware block schematic diagram that the automatic bearing calibration of printer is applicable to;

Fig. 3 is an employed alignment original copy exemplary plot in the inventive method;

Fig. 4 is the preferred embodiment flow chart of the inventive method;

Fig. 5 is the functional block diagram that the function of printer and image scanner is integrated in the multifunctional paper feeding machine of one.

Each element that is comprised in graphic of the present invention lists as follows:

PC 20 printers 21

Image scanner 22 anchor points 31

Alignment line segment 32

Embodiment

Concrete scheme of the present invention is described in detail by following examples and accompanying drawing thereof.

See also shown in Figure 2, it the hardware block schematic diagram that the automatic bearing calibration of printer is suitable for for the present invention develops, wherein printer 21 is electrically connected on the PC 20, and this PC 20 is electrically connected with an image scanner 22, and method of the present invention comprises the following step:

(a) make this printer 21 print one and proofread and correct original copy, this correction original copy is illustrated in figure 3 as an alignment (alignment) original copy, and has a plurality of anchor points 31 and a plurality of alignment line segments 32 on this alignment original copy;

(b) 22 pairs of these correction original copys of this image scanner are scanned, and then obtain a digitized video of this correction original copy;

(c) make 20 pairs of these digitized videos of this PC carry out an analyzing and processing step, elder generation is according to certain two point coordinates value (x1 of this anchor point 31, y1), (x2, y2) calculate an angle of inclination q=(x2-x1)/(y2-y1), carry out an interval location according to the size of this angle of inclination q then, in order to define an alignment interval that comprises this alignment line segment 32, then respectively this alignment line segment in this alignment interval is carried out calculation process, to obtain corresponding a plurality of regression straight lines, at last this regression straight line is carried out an adaptation analysis selecting the regression straight line of adaptation maximum, and then obtain a preferable correction and adjust parameter; And

(d) this PC 20 being utilized should preferable correction adjustment parameter adjust this printer 21, so finish this printer 21 from dynamic(al) correction.

The flow chart of said method as shown in Figure 4, as for how respectively this alignment line segment in this alignment interval to be carried out calculation process, and then obtain corresponding a plurality of regression straight lines, and at last this regression straight line is carried out the practice of an adaptation analysis with the regression straight line of selecting the adaptation maximum, then can following method finish:

Calculate the background grey scale average value of pixel in this alignment interval with formula (1), obtain the background GTG standard deviation of pixel in this alignment interval again with formula (2), and obtain a critical value T by formula (3).And the pixel Pi of GTG value in the alignment interval less than critical value T found out, obtain the regression straight line (as the formula (4)) of this pixel Pi, and then obtain the adaptation of regression straight line, and then can select the regression straight line of adaptation maximum automatically with formula (5).

Formula (1) $\stackrel{\‾}{P}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{P}_i/n$

Formula (2) $S_P=\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{(P_i-\stackrel{\‾}{P})}^2/n-1}$

Formula (3) T=P-3S _P

Formula (4) $\hat{Y}=\hat{a}+\hat{b}X$

=y- x wherein

$\hat{b}=\frac{\underset{i-1}{\overset{n}{\mathrm{\Σ}}}(x_i-\stackrel{\‾}{x})(y_i-\stackrel{\‾}{y})}{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{(x_i-\stackrel{\‾}{x})}^2}$

Formula (5) $R^2=1-\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{(y_i-\hat{y})}^2}{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{(y_i-\stackrel{\‾}{y})}^2}$

In addition, the function of printer and image scanner is integrated in the multifunctional paper feeding machine (functional block diagram as shown in Figure 5) of one, also applicable the above embodiments practice, there is no too different therebetween, so do not repeat them here, the above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims (6)

1. automatic bearing calibration is applicable on the multifunctional paper feeding machine, and this multifunctional paper feeding machine provides one and prints a function and an image scanning function, it is characterized in that this method comprises the following step:

Print one and proofread and correct original copy, this correction original copy has a plurality of alignment line segments;

This correction original copy is carried out image scan, and then obtain a digitized video of this correction original copy;

Carry out an interval location to define an alignment interval to comprising those alignment line segments in this digitized video;

To those alignment line segments in this alignment interval, obtain corresponding a plurality of regression straight lines respectively;

Those regression straight lines are carried out an adaptation analysis to select the regression straight line of adaptation maximum, adjust parameter to obtain a preferable correction; And

Utilize this preferable correction to adjust parameter and adjust, so finish printing function in this multifunctional paper feeding machine from dynamic(al) correction.

2. automatic bearing calibration as claimed in claim 1 is characterized in that, this correction original copy is to be an alignment original copy, and has two anchor points on this alignment original copy at least.

3. automatic bearing calibration as claimed in claim 2 is characterized in that, further comprises step:

Calculate an angle of inclination according to these two the positioning point coordinate values in this digitized video, use during for this location, interval.

4. automatic bearing calibration of printer be applicable to that on the printer, this printer is electrically connected to a PC, and this PC is electrically connected with an image scanner, it is characterized in that, this method comprises the following step:

Make this printer prints go out one and proofread and correct original copy, this correction original copy has a plurality of alignment line segments;

This image scanner is scanned this correction original copy, and then obtain a digitized video of this correction original copy;

Carry out an interval location to define an alignment interval to comprising those alignment line segments in this digitized video;

To those alignment line segments in this alignment interval, obtain corresponding a plurality of regression straight lines respectively;

Those regression straight lines are carried out an adaptation analysis to select the regression straight line of adaptation maximum, adjust parameter to obtain a preferable correction; And

Make this preferable correction of this PC utilization adjust parameter this printer adjusted, so finish this printer from dynamic(al) correction.

5. the automatic bearing calibration of printer as claimed in claim 4 is characterized in that, this correction original copy is an alignment original copy, and has two anchor points on this alignment original copy at least.

6. the automatic bearing calibration of printer as claimed in claim 5 is characterized in that, further comprises step:

Calculate an angle of inclination according to these two the positioning point coordinate values in this digitized video, use during for this location, interval.

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