JP2003296069A - Printing pretreatment apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide full-page frame-less printing without losing information. <P>SOLUTION: An image magnifier 308 magnifies a size of an original image P by a predetermined magnifying ratio u to obtain a magnified image Q1. An image superimposing section 310 superimposes the original image P on a center of the obtained magnified image Q1 to obtain a superimposed image R1. A blur processing section 312 applies blur processing to an interface between the magnified image Q1 on the superimposed image R1 and the original image P. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to so-called borderless full-scale printing, in which printing is performed on the entire surface of a sheet without leaving a margin.

[0002]

2. Description of the Related Art FIG. 10 is an explanatory view for explaining a problem of conventional borderless entire surface printing.

Conventionally, in the case of performing borderless full-screen printing of images such as photographs by a printer or the like, as shown in FIG.
When the size of the image to be printed is made larger than the actual paper size and the image is printed, the edges of the image are slightly discarded (about 3 to 5 mm).

The reason why such discarding is performed is as follows.

That is, when performing borderless full-screen printing,
If the image can be printed so that it fits perfectly to the paper size, there is essentially no portion where the image is discarded. However, in that case, when the paper is slightly bent and fed at the time of printing in the printer, the image is printed at the margin of the paper width, and a white unprinted portion remains on the edge of the paper from the middle. This is caused by the fact that the paper becomes skewed with respect to the print head during printing, and the positional relationship between the paper and the head gradually shifts.

As described above, the reason why the paper is bent and fed is that the mechanical precision of the paper feed mechanism is limited, and the paper feed mechanism inevitably bends the paper a little and feeds the paper.
For example, the paper itself does not form an accurate rectangle and has skew distortion, and it is quite difficult to completely avoid either cause.

Therefore, conventionally, as described above, the size of the image is made slightly larger than the paper size,
By printing the image, even when the paper is fed with a slight bend, it is possible to prevent a white unprinted portion from remaining on the edge of the paper.
In other words, such discarding of the edge portion of the image is caused by the mechanical precision of the paper feeding mechanism and the skew distortion of the paper.
Even if the paper was bent a little, it was necessary to prevent the white unprinted part from remaining.

[0008]

However, such discarding of the end portion of the image does not change the fact that some information originally supposed to be printed as an image is lost. Some people are concerned about the lack of information, and it has been desired to realize borderless full-scale printing without information loss.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a technique which enables borderless whole surface printing without loss of information.

[0010]

In order to achieve at least a part of the above-mentioned object, the pre-printing processing apparatus of the present invention prints a print image on the entire surface of a sheet without leaving a margin. A pre-printing apparatus that performs pre-processing when capturing an original image to be printed, and adds an extended image created based on image information obtained from the original image to the peripheral portion of the original image. The gist is to provide an extended image adding unit for obtaining the print image.

In the print image thus obtained, the original image is located at the center and the extended image is located at the end. Therefore, if such a print image is printed on the entire surface of the paper without leaving a margin, the original image remains even if the end of the print image is discarded at the time of printing, and the information desired to be printed as an image is lost. You can print everything without it.

In the pre-printing processing apparatus of the present invention, the extended image adding unit enlarges the original image or the superimposed image, and the original image or the original image at the center of the enlarged image obtained by the enlargement. An image superimposing unit that superimposes a superimposed image to obtain a new superimposed image, and repeats enlargement by the image enlarging unit and superimposition by the image superimposing unit once or more with respect to the original image, It is preferable that the finally obtained superimposed image is the printed image.

By doing so, it is possible to easily create and add an extended image using the image information of the end portion of the original image to the peripheral portion of the original image.

In the print pre-processing apparatus of the present invention, the extended image adding section is provided at a boundary portion between the enlarged image and the original image or the superposed image in the new superposed image obtained by superposition. It is preferable to further include a blurring processing unit that performs blurring processing.

By performing such blurring processing, it is possible to make the boundaries visually inconspicuous in the superimposed image.

In the pre-printing processing apparatus of the present invention, the image enlarging section has an enlargement ratio according to the repetition frequency of the repetitive pattern when the repetitive pattern exists at the end of the original image, or the original image or It is preferable to enlarge the superimposed image.

As described above, by using the enlargement ratio according to the repetition frequency of the repeated pattern, when the original image or the superimposed image is superimposed on the enlarged image, a natural superimposed image in which the repeated pattern portion is continuous can be obtained. Will be able to.

The present invention is not limited to the aspect of the apparatus invention such as the above-described printing pretreatment apparatus, but can be realized in the aspect of a method invention such as a printing pretreatment method. Furthermore, an aspect as a computer program for constructing those methods and apparatuses, an aspect as a recording medium recording such a computer program, and
It can also be realized in various forms such as a data signal embodied in a carrier wave including the computer program.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in the following order based on Examples. A. Configuration of Example: B. Operation of Example: C. Modification:

A. Configuration of Embodiment: FIG. 1 is a block diagram showing a printing system including a computer and a printer having a print pre-processing apparatus as an embodiment of the present invention.

The printing system shown in FIG.
0 and a computer 200, of which the computer 200 is a CPU 250 for performing various processes and controls according to a computer program.
And a memory 2 for storing the computer program, data obtained during processing, etc.
52, an I / O unit 254 for exchanging data and the like between various peripheral devices, a keyboard and a pointing device, and an input device 256 for inputting a user's instruction and the like, a CRT, Monitor 2 consisting of a liquid crystal display etc. for displaying images etc.
58, a modem, a terminal adapter, a network card, and the like, a communication device 260 for communicating with other devices via a network, a hard disk device 262 for storing image data, the computer program, etc. Written CD-ROM2
CD-ROM drive device 266 for reading 64
And are equipped with. Of these, the memory 252 is
As the computer program, an application program, a printer driver program, etc. are stored.

FIG. 2 is a block diagram showing the arrangement of a printer driver 304 which realizes a print pre-processing apparatus as an embodiment of the present invention.

The CPU 250 functions as the application 302 by reading and executing an application program among the computer programs stored in the memory 252, and functions as the printer driver 304 by reading and executing the print driver program. To do. Of these, the printer driver 304 includes the extended image adding unit 305 and the first switching unit 3
06, the image enlarging unit 308, the image superimposing unit 310, the blurring processing unit 312, the second switching unit 314, the image processing unit 316, the user interface unit 318, and the image analysis unit 320.

In this embodiment, as shown in FIG. 1, the computer program stored in the memory 252 is provided in a form recorded on a CD-ROM 264 which is a recording medium, and read by a CD-ROM drive device 266. As a result, it is taken into the computer.
The loaded computer program is transferred to the hard disk device 262, and then transferred to the memory 252 at the time of start-up. Alternatively, the read computer program may be directly transferred to the memory 252 without passing through the hard disk device 262.

As described above, in this embodiment, it is described that the CD-ROM is used as the "recording medium" for recording the computer program in a computer-readable manner. However, in addition to this, a flexible disk, a magneto-optical disk, an IC. Card, ROM cartridge, punch card,
It is possible to use various computer-readable media such as a printed matter on which a code such as a bar code is printed, an internal storage device (memory such as RAM or ROM) of the computer, and an external storage device.

In addition to providing the computer program in the form recorded on such a recording medium, the computer program accesses a program server (not shown) which supplies the computer program via a network, and the program server sends a PC. You may make it take in.

A part of the computer program may be constituted by an operating system program.

B. Operation of Example: Application 30
2 is activated, the user operates the input device 256 to display in the application 302, for example,
When a desired image such as a photo is selected and an instruction to print the image is given, the printer driver 304 starts up, and the user interface unit 318 of the printer driver 304
A print condition setting window (not shown) is displayed on the screen of the monitor 258. Here, when the user sets the paper size, the print quality, and the like as the print conditions, sets “borderless full-page printing”, and gives an instruction to start the printing, FIG.
An image to be printed from the application 302 to the printer driver 304, as shown in FIG.
Data for P are given. At this time, the application 302 gives the original image P of a size equal to or smaller than the set paper size.

In the printer driver 304, the image analysis unit 320 of the extended image addition unit 305 acquires the set printing conditions from the user interface unit 318, and "borderless full-screen printing" is set. Recognize. Then, the original image P given from the application 302 is analyzed. The image analysis unit 320 determines the size of the print image S to be finally obtained from the set paper size, the given size of the original image P, and the like based on the acquired printing conditions and the analysis result of the original image P. To set. Specifically, when the size of the original image P is equal to the paper size, considering the mechanical accuracy of the paper feeding mechanism in the printer 100, the skew distortion of the paper, etc., For example, the size of the print image S is set to a size of about 5 mm on the scale of the print result so as to extend to the peripheral portion. If the size of the original image P is smaller than the paper size, the size is set to be about 5 mm larger than the paper size.

Based on the size of the original image P and the size of the print image S that has been set, the image analysis unit 320 determines the enlargement ratio u in the image enlargement unit 308, which will be described later, and the number v of repetitions of enlargement / superimposition processing. decide. In addition, the degree and range of blurring in the blurring processing unit 312 are also determined according to the set print quality and the like. Then, the image enlarging unit 308, the blurring processing unit 312, and the first and second switching units 306 and 314 are controlled according to the determinations. Note that how to determine the enlargement ratio u and the number of repetitions v will be described later.

FIG. 3 is an explanatory diagram showing how an image is processed by the pre-printing processing apparatus of this embodiment.

The image analysis section 320 first switches the first switching section 306 to the a side, as shown in FIG. First
The switching unit 306 inputs the data of the original image P given from the application 302 to the image enlarging unit 308 and the image superimposing unit 310, respectively.

The image analysis unit 320 instructs the determined enlargement ratio u to the image enlargement unit 308, and the image enlargement unit 308 enlarges the size of the original image P by the instructed enlargement ratio u, as shown in FIG. As shown, the enlarged image Q1 is obtained. Image superimposing unit 310
Superimposes the original image P on the center of the obtained enlarged image Q1 to obtain a superimposed image R1. Specifically, the superimposed image R1 is obtained by overwriting the original image P in the center of the enlarged image Q1 and combining the two.

The image analysis unit 320 instructs the blurring processing unit 312 on the determined degree and range of blurring, and the blurring processing unit 312 accordingly responds to the boundary portion between the enlarged image Q1 and the original image P in the superimposed image R1. Then, blurring processing is performed. The blurring process will be described later.

Subsequently, the image analysis unit 320 sets the second switching unit 314 to the b side, and the first switching unit 306 to the b side, too.
Switch each. The second switching unit 314 sends the data of the superimposed image R1 that has been subjected to the blurring process to the first switching unit 306, and the first switching unit 306 again transmits the data of the superimposed image R1 to the image enlarging unit 308 and the image superimposing unit. 31
Enter 0 respectively.

The image enlarging section 308 enlarges the size of the superimposed image R1 at the same enlargement ratio as the previous one to obtain a new enlarged image Q2. The image superimposing unit 310 uses the obtained enlarged image Q
The superimposed image R1 is superimposed on the center of 2 to obtain a new superimposed image R2. The blurring processing unit 312 performs blurring processing on the boundary portion between the enlarged image Q2 and the previous superimposed image R1 in the obtained superimposed image R2.

Thereafter, the same processing is repeated. In addition,
In FIG. 2, the reference symbol n attached to the enlarged image Qn and the superimposed image Rn indicates the number of times the enlarged / superposed process is repeated, and the range is 1 to v. Image analysis unit 320
Obtains the number of times of superimposition (that is, corresponds to the number of times n of repeating the enlargement / superimposition process described above) from the image superimposing unit 310, and when the number of times n becomes equal to the previously determined number of times of repetition v, The 2 switching unit 314 is switched to the a side, and the repetition of the enlargement / superimposition processing is stopped.

The second switching unit 314 sets the finally obtained data of the superimposed image Rv as the data of the print image S,
It is sent to the image processing unit 316.

As shown in FIG. 3, the finally obtained superimposed image Rv, that is, the print image S is formed by combining the original image P and the extended image added to the peripheral portion thereof. The extended image has a configuration in which the end portion of the original image P is enlarged and arranged adjacently in multiple layers.
Note that FIG. 3 illustrates a case where the number of repetitions v is “4”, and the end portion of the original image P is quadrupled in the extended image.

Next, the image processing unit 316 performs image processing as a normal printer driver. In particular,
An unillustrated resolution conversion unit, color conversion unit, halftone processing unit, lookup table, and the like are provided. First, the resolution conversion unit performs interpolation, thinning, and the like on the input print image S data. A resolution conversion process is performed to convert the image to a desired resolution at the time of printing, and then the color conversion unit refers to the look-up table and converts the data of the print image S from the RGB data of the printer 100. For example, convert to CMYK data corresponding to the input,
The halftone processing unit performs well-known dither processing and error diffusion processing on the data of the print image S so that desired gradation expression can be performed when printing is performed.

In this way, the data of the print image S processed by the image processing unit 316 is transferred to the printer 100. The printer 100 feeds a sheet of paper and prints an image on the entire surface of the sheet of paper with no margin based on the transferred data.

FIG. 4 is an explanatory view showing a result of printing an image processed by the pre-printing processing apparatus of this embodiment by borderless whole surface printing.

As described above, the size of the print image S is
Since the print result scale is set to be about 5 mm, which is larger than the paper size, when the print image S is printed on the paper, the edges of the print image S are slightly discarded as shown in FIG. However, as mentioned above,
Since the print image S is an image configured by adding the extended image to the peripheral portion of the original image P, the end portion of the print image S to be discarded corresponds to the extended image portion. As described above, the extended image is an image added to the original image P and is not an originally necessary image, so that it can be discarded without any problem. On the other hand, as described above, since the size of the original image P is equal to or smaller than the paper size, the original image P located in the center of the print image S is All the information remains, and all the information desired to be printed as an image can be printed without loss. Also,
Although a part of the expanded image remains without being discarded, the expanded image is an image created using the image information of the end portion of the original image P, and therefore has no affinity with the end portion of the original image P. It is high, and therefore, even if a part remains, it is not visually unnatural.

FIG. 5 shows a case where an image processed by the pre-printing processing apparatus of this embodiment is printed by borderless full-screen printing.
FIG. 9 is an explanatory diagram showing a printing result when a sheet is bent and fed.

Further, in the printer 100, due to the mechanical accuracy of the paper feed mechanism and the skew distortion of the paper, even if the paper is fed with a slight bend in the paper feed direction, as described above, the print image S Since the size is set to be larger than the paper size, as shown in FIG. 5, no white unprinted portion remains on the edge of the paper.

Now, subsequently, the blurring processing section 31 described above.
The blurring process performed in 2 will be briefly described.

When the superimposed image Rn (or the original image P) is superimposed on the enlarged image Qn, the boundary between the enlarged image Qn and the superimposed image Rn (or the original image P) usually becomes discontinuous imagewise. As it is, the border becomes visually conspicuous. Therefore, in the present embodiment, the blurring processing unit 312
The blurring process is performed on the boundary between the enlarged image Qn and the superimposed image Rn (or the original image P), that is, the pixel values (color signal levels) near the boundary are averaged to make the boundary inconspicuous. I am trying.

Specifically, the blurring processing section 312 sets the pixel value p when the coordinates of an arbitrary point E near the boundary is (x, y) and the pixel value is p (x, y). (X, y)
Are averaged according to equation (1).

[0049] p '(x, y) = (p (x, y) + p (x-1, y) + p (x, y-1) + p (x + 1, y) + p (x, y + 1 )} / 5… (1)

However, p '(x, y) is a pixel value obtained by averaging. Further, in the formula (1), the distance from the point E is 1
Averaging is performed within the range.

Since the degree of blurring can be changed by changing the range to be averaged, the blurring processing section 312 adjusts the averaging range so as to attain the instructed degree of blurring. In the actual process,
The averaging is performed in a wide range near the boundary, and the averaging range is narrowed as the distance from the boundary is increased, thereby performing blurring processing with less visual discomfort.

Further, the blurring processing section 312 performs blurring processing within the designated blurring range in the vicinity of the boundary. Specifically, for example, when the original image P is superimposed on the enlarged image Q1, the inside of the boundary becomes the original image P. Therefore, the inside of the boundary has a maximum line width of 8 (that is, 1 to 8).
The blurring process is performed in the narrowest possible range (variable between line widths), and the blurring process is performed on the outside of the boundary in the range of the line width that is about 1.5 times the inside.

Next, the enlargement ratio u in the image analysis unit 320.
Also, a method of determining the number of repetitions v will be described. The following two methods can be considered as the method of making the determination.

(A) The enlargement factor u is determined to a value close to 100%. The enlargement ratio u is determined to be, for example, 100.5%, and the original image P and the size of the print image S to be finally obtained are used for the original image P at the enlargement ratio of 100.5%. The number of repetitions v is determined by determining how many times the size of the print image S should be enlarged to obtain the size of the print image S.

In this way, by determining the enlargement factor u to a value close to 100% and repeating the enlargement / superimposition processing, the image at the edge of the original image P is gradually enlarged to the peripheral portion of the original image P. Can be added.

An actual example of the print image S created using the enlargement ratio u and the number of repetitions v determined by such a method is shown in FIGS. 6 and 7. The print image S shown in FIG. 6 is an image obtained when the enlargement ratio u is 100.5% and the number of repetitions v is 6, and the print image S shown in FIG. 7 has an enlargement ratio u of 100.5%. It is an image obtained by setting the number of repetitions v to 8 times.

(B) The expansion rate u is determined from the frequency of the repeating pattern. Here, the repeating pattern is a pattern in which similar patterns are repeated, and examples thereof include images of roof tiles, images of many flowers and leaves, images of artificial buildings arranged at equal intervals, and the like. .

When an image of such a repetitive pattern is present at the end of the original image P, its repetitive frequency (the number of times the pattern is repeated within a certain area;
Magnification frequency u so that the repetition frequency of the corresponding repeating pattern in the enlarged image Q is synchronized with the spatial frequency).
To decide. Also, the determined enlargement ratio u and the original image P
And from the size of the print image S, as in the case of (a),
Determine the number of iterations v.

As described above, by determining the enlargement factor u according to the repetition frequency, when the original image P is superimposed on the enlarged image Q, a natural superimposed image in which the repeated pattern portions are continuous can be obtained. .

Specifically, first, the original image P is converted into frequency components by the discrete cosine transform (DCT),
By analyzing the conversion result, it is determined whether or not the image of the repeating pattern exists at the end of the original image P. Then, when the image of the repeating pattern exists, when the original image P is superimposed on the enlarged image Q, the width between the edge of the original image P and the edge of the enlarged image Q (hereinafter, referred to as an extended portion) is , The enlargement factor u is determined so as to be an integral multiple of the repetition cycle (reciprocal of the repetition frequency) of the repetition pattern.
By doing so, it is possible to superimpose the images with little discomfort. For example, when the image of the roof tile of the above example exists at the end of the original image P, if the enlargement ratio u is determined as described above, the repeated pattern of the roof tile of the original image P does not exist in the expanded portion. You can make it appear naturally.

The enlargement factor u determined by the above method
8 and 9 show actual examples of the print image S created by using the number of repetitions v. The print image S shown in FIG. 8 is an image obtained when the enlargement ratio u is 103% and the number of repetitions v is once, and the print image S shown in FIG.
It is an image obtained with 04% and the number of repetitions v being once.

If the enlargement factor u is too close to 100%,
Since the expansion range becomes small and the repeated pattern cannot be included in it, 102%, 103
It is necessary to adjust appropriately such as%, and take care so that the pattern is repeated without an enlarged portion and discomfort.

On the other hand, when the enlargement ratio u is increased, the adverse effect thereof is that the degree of discontinuity at the boundary increases. For example, when the boundary between the white sand beach and the blue sea is at the end of the original image P, if the enlargement ratio u is increased, the boundary between the sand beach and the sea is greatly shifted at the boundary between the enlarged image and the original image in the superimposed image, which is extremely high. There is a possibility that it will be unnatural. In such a case, it is desirable that the enlargement ratio u is not so large and is set to about 100.5%, and the enlargement / superimposition processing is repeated.

C. Modification: The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the scope of the invention.

In the above-described embodiment, the enlargement ratio u in the image enlargement unit 308 is maintained while the enlargement / superimposition processing is repeated.
However, the enlargement ratio u may be changed each time the enlargement / superimposition processing is repeated.

Further, the end portion of the original image P may be divided into a plurality of areas, and the enlargement ratio u may be switched for each area according to the image in each area. For example, in a certain area where the image of the repeating pattern does not exist, the enlargement factor u is set to 100.
Repeat the enlargement / superimposition process at about 5%, and
In another area where the image of the repetitive pattern exists, the enlargement factor u is set to about 102 to 105%, and the enlargement / superimposition process utilizing the repetitive pattern is repeated.

In the above embodiment, the extended image is
It was created based on the image information of the edge of the original image P,
As long as the image information is obtained from the original image P, it may be created based on the image information of the portion other than the end portion.

In the above embodiment, the extended image is
Although the original image P is created by enlarging it, it may be created by reducing it. Alternatively, the extended image may be created by subjecting the original image P to so-called affine transformation such as rotation and movement of the original image P. Further, the original image P may be subjected to gradation conversion processing, color conversion processing, spatial frequency conversion processing, or may be subjected to interpolation processing, mosaic processing, or the like to create an extended image.

Further, in the above-described embodiment, the print preprocessing device is realized by the printer driver 304, but it may be realized by the application 302. Further, the print pre-processing apparatus is provided in the computer 200 directly connected to the printer 100, but it may be provided in the computer connected to the printer 100 via a computer network such as a local area network or the Internet. .
Further, the pre-print processing device may be provided in the printer 100 instead of the computer 200.

[Brief description of drawings]

FIG. 1 is a block diagram showing a printing system including a computer and a printer including a print pre-processing apparatus as an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a print driver 304 that realizes a print pre-processing apparatus as an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing how an image is processed by a pre-printing processing apparatus according to the present exemplary embodiment.

FIG. 4 is an explanatory diagram showing a result of printing an image processed by a pre-printing processing apparatus according to the present embodiment by borderless full-screen printing.

FIG. 5 is an explanatory diagram showing a printing result when a sheet is bent and fed when an image processed by the pre-printing processing apparatus according to the present exemplary embodiment is printed by borderless full-page printing.

FIG. 6 is an explanatory diagram showing an actual example of a print image S created with an enlargement ratio of 100.5% and a repetition count of 6 times.

FIG. 7 is an explanatory diagram showing an actual example of a print image S created with an enlargement ratio of 100.5% and a repetition count of 8 times.

FIG. 8 is an explanatory diagram showing an actual example of a print image S created with an enlargement ratio of 103% and a repeat count of 1 time.

FIG. 9 is an explanatory diagram showing an actual example of a print image S created with an enlargement ratio of 104% and a repeat count of 1 time.

FIG. 10 is an explanatory diagram for explaining a problem of conventional borderless entire surface printing.

[Explanation of symbols]

100 ... Printer 200 ... Computer 250 ... CPU 252 ... memory 254 ... I / O section 256 ... Input device 258 ... Monitor 260 ... communication device 262 ... Hard disk device 264 ... CD-ROM 266 ... CD-ROM drive device 302 ... Application 304 ... Printer driver 305 ... Extended image adding section 306 ... First switching unit 308 ... Image enlarging section 310 ... Image superimposing section 312 ... Blur processing unit 314 ... Second switching unit 316 ... Image processing unit 318 ... User interface section 320 ... Image analysis unit P ... Original image Q ... Enlarged image R ... Superimposed image S ... Print image u ... Expansion rate v ... Number of repetitions

Claims (7)

[Claims] 1. A pre-printing apparatus for performing pre-processing when printing a print image on the entire surface of a sheet without leaving a margin, in which an original image to be printed is taken in and a peripheral portion of the original image is captured.
A pre-printing apparatus including an extended image adding unit that obtains the print image by adding an extended image created based on image information obtained from the original image. 2. The print pre-processing apparatus according to claim 1, wherein the extended image addition unit enlarges the original image or the superimposed image, and a center of the enlarged image obtained by the enlargement. An image superimposing unit that superimposes the original image or the superposed image on each other to obtain a new superposed image, wherein the original image is enlarged by the image enlarging unit and superposed by the image superimposing unit at least once. A pre-printing apparatus that repeats the above and uses the finally obtained superimposed image as the print image. 3. The pre-printing apparatus according to claim 2, wherein the extended image adding unit is the original image or the superimposed image superimposed on the enlarged image in the new superimposed image obtained by superimposing. The pre-printing processing apparatus further including a blurring processing unit that performs blurring processing on a boundary portion between the and. 4. The pre-printing apparatus according to claim 2, wherein the image enlarging unit has an enlarging ratio according to a repetitive frequency of the repetitive pattern when a repetitive pattern exists at an end of the original image. A pre-printing apparatus, wherein the original image or the superimposed image is enlarged. 5. A pre-printing method for performing pre-processing when printing a print image on the entire surface of a sheet without leaving a margin, the step of preparing an original image to be printed, and a peripheral portion of the original image. And a step of adding an extended image created based on image information obtained from the original image to obtain the print image. 6. A computer program for performing a pre-processing for printing a print image on the entire surface of a sheet without leaving a margin, in which an original image to be printed is fetched, and a peripheral portion of the original image is captured.
A computer program for causing a computer to realize a function of obtaining the print image by adding an extended image created based on image information obtained from the original image. 7. A computer-readable recording medium in which the computer program according to claim 6 is recorded.