JP5398030B2 - Print image processing apparatus, print apparatus, print image processing method, and print image processing program - Google Patents

Description

  The present invention relates to a print image processing apparatus, a printing apparatus, a print image processing method, and a print image processing program, and more particularly to a print image processing apparatus that can reduce the influence of show-through in the case of duplex printing.

  With the widespread use of office automation, printers that print output from computer devices on paper are increasingly used. A network printer shared by a plurality of computers connected to a network, a copy facsimile multifunction machine having functions such as a copy machine and a fax machine, and the like are also rapidly spreading. As a printing method, a thermal transfer method, an inkjet method, a dry electrophotographic method (laser printer), etc. are mainly used.

  Many of these printers and multifunction peripherals can perform printing on both sides of a single sheet of paper. In recent years, the need for saving paper resources has been sought, especially in the general office where duplex printing is used.

  FIG. 8 is an explanatory diagram showing double-sided printing with an existing computer 801. A printer 822 capable of duplex printing is connected to the computer 801. A main operation control means (CPU) 811 provided in the computer 801 executes an application execution unit 901 that executes application software such as a word processor, a spreadsheet, and a web browser by executing software, and print data created by the application execution unit 901. Each print output unit 902 that outputs to the printer 822 operates.

  When the user inputs a printing operation, the application execution unit 901 generates front-side image data 951 and back-side image data 952 to be printed on the front and back sides of the printing paper and stores them in the storage unit 812 accordingly. The control is transferred to the print output unit 902. The print output unit 902 outputs the front surface image data 951 and the back surface image data 952 to the printer 822 and prints them on the front and back sides of the same sheet.

  The following technologies are related to this. Among them, Patent Document 1 describes an image output system that changes the layout of a print image in order to eliminate the influence of show-through when performing double-sided printing. Patent Document 2 describes an image data processing apparatus that prints by subtracting transmission image data obtained by multiplying image data for the front surface by a coefficient corresponding to the transmittance of the medium from the image data for the back surface. Patent Document 3 describes an image forming apparatus that reduces the influence of show-back from an image scanned from a show-through document.

JP 2005-094666 A JP 2010-118808 A Japanese Patent Application Laid-Open No. 06-062216

  FIG. 9 shows a printed front image 961 and a printed back image that are actually printed when the computer 801 shown in FIG. 8 performs duplex printing with the front image data 951 and the back image data 952 output to the printer 822. FIG. The post-printing front image 961 and the post-printing back image 962 printed on the paper are actually visible not only from the intended side but also from the back side. In this specification, this phenomenon is referred to as show-through.

If the pixel density of the front surface image data 951 at a certain point on the printing paper is x, the pixel density of the back surface image data 952 printed from the back side of the point x is y, and the transmittance of the printing paper is a, The pixel density of the printed front surface image 961 obtained by outputting the front surface image data 951 and the back surface image data 952 as they are to the printer 822 is expressed by the following equation (1).

  As shown in FIG. 9, the front surface image 961 after printing is added to the pixel density a × y of the back side image data 952 which is offset to the desired pixel density x, and becomes a pixel density higher by that amount. End up. The same applies to the back-side image 962 after printing.

  The technology that can reduce the influence of the show-through in the post-printing front surface image 961 and the post-printing back surface image 962 is not described in the aforementioned Patent Documents 1 to 3. The invention described in Patent Document 1 makes it easy to see the image after printing by performing “layout change” of the image data, but does not reduce the show-through itself.

  The invention described in Patent Document 2 corrects the print data on the back surface from the print data on the front surface to reduce the effect of the show-back, but does not correct the print data on the front surface, so the show-through seen from the back surface. Is not reduced. The invention described in Patent Document 3 reduces the effect of show-through from an image scanned from a show-through document, but does not reduce the effect of show-through during printing.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a print image processing apparatus, a printing apparatus, and a print image that can reduce the influence of show-through when printing with a printing apparatus (printer) capable of double-sided printing and obtain an easy-to-read print result. A processing method and a print image processing program are provided.

In order to achieve the above object, the print image processing apparatus according to the present invention transmits the print image data for the front side and the back side to a printer capable of double-sided printing, and each of these print image data is the same. A print image processing apparatus that prints on the front and back surfaces of a printing paper, and adjusts the pixel density of each given image data for the front and back according to the transmittance of the printing paper given in advance A printing image data processing unit that creates printing image data for front and back surfaces, and a print output unit that transmits printing image data for front and back surfaces to the printer, and a printing image The data processing unit sets the pixel density of a specific point in the front surface image data to x, the pixel density of the back surface image data printed from the back surface at the same position as x on the printing paper, y, and the transmittance to a. Assuming that the pixel density of the image data for printing for the front surface and the back surface after adjustment at a point at the same position as the specific point is x1 and y1, respectively, x1 = (x−a × y) / (1−a ^ 2 ), Y1 = (y−a × x) / (1−a ^ 2), and printing image data for the front side and the back side is created (a ^ 2 is a square of a) .

In order to achieve the above object, a printing apparatus according to the present invention includes a printing image processing apparatus according to any one of claims 1 to 2 and printing for front and back surfaces created by the printing image processing apparatus. And a print engine for printing the image data on the front and back surfaces of the same printing paper.

In order to achieve the above object, a printing system according to the present invention includes a client terminal including an application execution unit that executes application software and outputs image data for front and back surfaces, and for the front and back surfaces from the client terminal. a print image processing apparatus according to claim 1 for receiving image data, the print image processing apparatus print engine to be printed on the front and back surfaces of each same printing paper for printing image data for the back side and a surface that is created by the And.

To achieve the above object, the copy and facsimile multifunction peripheral according to the present invention, a print image processing apparatus as claimed in any one of claims 1 to 2, for the back surface and for creating the print image processing device And a copy facsimile multifunction printer main body for printing the print image data on the front and back surfaces of the same printing paper.

In order to achieve the above object, a printing image processing method according to the present invention is connected to a printer capable of duplex printing, and transmits printing image data for front side and back side to the printer. In a print image processing apparatus for printing data on the front and back surfaces of the same printing paper, each pixel of the given front and back image data according to the transmittance of the printing paper given in advance together with the print image data processing unit concentration creates a printing image data for the front and for the rear surface to adjust the print output unit transmits the print image data for the front and for the rear surface to the printer, the surface The process of creating the image data for printing for the back side and the back side is such that the pixel density at a specific point in the image data for the front side is x, and the back side image is printed from the back side at the same position as x on the printing paper. Assuming that the pixel density of the data is y, the transmittance is a, and the pixel densities of the image data for printing for the front surface and the back surface after adjustment at a point at the same position as the specific point are x1 and y1, respectively, x1 = (x -A * y) / (1-a ^ 2), y1 = (y-a * x) / (1-a ^ 2), and that the image data for printing for the front side and the back side is created. Characteristic (a ^ 2 is a square of a) .

In order to achieve the above object, a print image processing program according to the present invention is connected to a printer capable of double-sided printing, and print image data for front side and back side are transmitted to the printer and these print images are sent. A printing image processing apparatus for printing data on the front and back surfaces of the same printing paper, respectively, and a computer provided in the printing image processing apparatus for a given front surface according to the transmittance of the printing paper given in advance. Executes the procedure for adjusting the pixel density of the image data for the back side and creating the image data for printing for the front side and the back side, and the procedure for sending the image data for printing for the front side and the back side to the printer together make, steps to create a printing image data for the front and for the back surface, and x a pixel density of a particular point in the surface image data x, on the printing paper The pixel density of the image data for printing on the front surface and the back surface after adjustment at a point at the same position as the specific point, where y is the pixel density of the back surface image data printed from the back surface at one position Are x1 and y1, respectively, and x1 = (x−a × y) / (1-a ^ 2), y1 = (y−a * x) / (1-a ^ 2) The image data for printing is created (a ^ 2 is a square of a) .

  As described above, the present invention creates front and back printing image data from the pixel density and transmittance of each of the front and back image data, and uses the front and back printing image data. Since it is configured to print on the back side, it has the excellent feature of being able to obtain easy-to-read print results by reducing the influence of show-through when printing with a printing device (printer) capable of double-sided printing. A print image processing apparatus, a printing apparatus, a print image processing method, and a print image processing program can be provided.

FIG. 3 is an explanatory diagram showing in more detail the configuration of software executed by the computer shown in FIG. 2. FIG. 2 is an explanatory diagram illustrating a configuration of a computer that is a print image processing apparatus according to the first exemplary embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating an example of image data to be printed on the front surface and the back surface of the printing paper received by the printing image data processing unit from the application execution unit in the computer illustrated in FIGS. It is explanatory drawing shown about the example of the surface image data for printing calculated | required from the surface image data and back surface image data shown in FIG. 3, and the back surface image data for printing. FIG. 5 is an explanatory diagram illustrating an example of a printed front image and a printed back image that are both-side printed on the same sheet from the printing front image data and the printing back image data illustrated in FIG. 4. 3 is a flowchart illustrating processing performed by an image data processing unit illustrated in FIG. 1. It is explanatory drawing which shows the structure of the printer which is a printing apparatus which concerns on the 2nd Embodiment of this invention. It is explanatory drawing shown about the double-sided printing in the existing computer. FIG. 9 is an explanatory diagram illustrating a printed front image and a printed back image that are actually printed when the computer illustrated in FIG. 8 performs duplex printing with the front surface image data and the back surface image data output to the printer.

(First embodiment)
Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIG.
First, the basic content of the present embodiment will be described, and then more specific content will be described.
The computer 10 that is the print image processing apparatus according to the present embodiment transmits the print image data for the front side and the back side to the printer 22 capable of double-sided printing, and prints the same image data for printing. It is a computer that prints on the front and back sides of paper. The computer 10 adjusts the pixel density of the given image data for the front side and the back side according to the transmittance of the printing paper given in advance to obtain the image data for printing for the front side and the back side. A printing image data processing unit 102 to be created, and a print output unit 103 that transmits printing image data for front and back sides to the printer.

  Further, the printing image data processing unit 102 sets the pixel density of a specific point in the front surface image data to x, the pixel density of the back side image data printed from the back side at the same position as x on the printing paper, y, Assuming that the transmittance is a and the pixel densities of the printing image data for the front surface and the back surface at the same position as x are x1 and y1, respectively, x1 = (x−a × y) / (1−a ^ 2 ), Y1 = (y−a × x) / (1−a ^ 2), and print image data for the front side and the back side is created (a ^ 2 is a square of a). Furthermore, an application execution unit 101 that executes application software and outputs image data for the front side and the back side is also provided.

With the above configuration, the computer 10 according to the present embodiment can reduce the influence of the show-through and obtain an easy-to-read print result.
Hereinafter, this will be described in more detail.

  FIG. 2 is an explanatory diagram showing the configuration of the computer 10 that is the print image processing apparatus according to the first embodiment of the present invention. The computer 10 stores a main processing control means (CPU: Central Processing Unit) 11 which is a main body for executing various processes described as a computer program, a program executed by the main processing control means 11 and data to be used. The external storage means 12, the temporary storage means 13 for temporarily storing data in operation by the main calculation control means 11, the data input means 14 for receiving data input such as an image from the outside, and the main calculation control means 11 Data output means 15 for outputting processed data to the outside is connected to an internal bus 16 for exchanging data and control signals between these devices.

  Here, the external storage means 12 is a large-capacity storage device such as a hard disk drive, an optical disk drive, or a flash memory, and an OS (Operating System), application, print processing software, etc. executed by the main arithmetic control means 11. Is remembered. The temporary storage means 13 is a so-called RAM (Random Access Memory). An image input device 21 such as a scanner or a digital camera is connected to the data input means 14. A printer 22 capable of duplex printing is connected to the data output means 15.

  FIG. 1 is an explanatory diagram showing in more detail the configuration of software executed by the computer 10 shown in FIG. The main arithmetic control means 11 of the computer 10 includes an application execution unit 101 and a print image data processing unit 102 which will be described later, and print image data generated by the print image data processing unit 102 via a data output unit 15. 22 operates as each of the print output units 103 that output to the printer 22.

  The application execution unit 101 executes application software such as a word processor, spreadsheet, and web browser. When a printing operation is input from the user, the image data on the front and back surfaces of the printing paper and the transmittance of the printing paper Is stored in the temporary storage unit 13, and the process is passed to the print image data processing unit 102. The print image data processing unit 102 performs print image data processing to be described later on these data to create print image data, stores the data in the temporary storage unit 13, and passes it to the print output unit 103.

(Image data creation process for printing)
FIG. 3 is an explanatory diagram illustrating an example of image data to be printed on the front and back surfaces of the printing paper received by the printing image data processing unit 102 from the application execution unit 101 in the computer 10 illustrated in FIGS. . At the same time, the image data processing unit 102 also receives data on the printing sheet transmittance 203 = a.

  Note that a serial number starting from 1 is assigned to each pixel of the front surface image data 201 and the back surface image data 202. Needless to say, actual printing image data has hundreds of thousands to several millions of pixels or more, but FIG. 3 shows an example of only nine pixels in order to explain the concept of the present invention. Show. This serial number is referred to as a pixel selection variable i in this specification. The pixel density of the front surface image data 201 at the pixel indicated by the pixel selection variable i (hereinafter simply referred to as pixel i) is defined as x (i), and the pixel density of the back surface image data 202 at the same point on the paper is defined as y (i). To do.

  In the surface image data 201, the pixel at the upper left corner is set to i = 1, and from there, the number advances one by one in the right direction. When the right end is reached, the pixel advances to the next lower row and the number advances by one from left to right. Contrary to the front surface image data 201, the back surface image data 202 sets the pixel in the upper right corner to i = 1, the number advances by 1 in the left direction from there, and when reaching the left end, proceeds to the next lower row and proceeds to the right → left The number advances one by one in the direction.

  Since the front image data 201 and the back image data 202 are printed on the front and back of the same printing paper, the same i value in the front image data 201 and the back image data 202 is the same on the printing paper. The front side and the back side at the point are shown. Hereinafter, the front surface image data for printing 211 and the back surface image data for printing 212 shown in FIG. 4 and the post-printing front surface image 221 and the back side image after printing 222 shown in FIG.

  From the pixel density x of the front surface image data 201, the pixel density y of the back surface image data 202 at the same point on the paper, and the transmittance 203 = a of the printing paper, the image data processing unit 102 is as follows. Then, the printing front image data 211 and the printing back image data 212 are generated and stored in the temporary storage means 13.

The front surface image data 211 for printing at the same point as x is x1, and the pixel density of the back side image data 212 for printing printed from the back side at the same point as x1 is y1. Thus, when x1 and y1 at which the print density obtained by the above-described equation 1 is equal to the original pixel densities x and y are obtained, the following equation 2 is provided between x, y, a and x1, y1. Relationship is established. Note that, in the expression 2 and the expression 3 described later, since the comparison is performed for the same pixel selection variable i, the description of (i) indicating the pixel selection variable is omitted.

From this, x1 and y1 are derived as shown in Equation 3 below.

  The image data processing unit 102 obtains x1 and y1 from x, y, and a using the relationships shown in the above equations 2-3, and prints the surface image data 211 for printing having x1 and y1 as pixel densities and printing Back side image data 212 is generated.

  FIG. 4 is an explanatory diagram showing an example of the printing front image data 211 and the printing back image data 212 obtained from the front image data 201 and the back image data 202 shown in FIG.

  Then, the print output unit 103 that has received the print front image data 211 and the print back image data 212 causes the printer 22 to print these image data on the front and back surfaces of the same sheet, respectively. FIG. 5 is an explanatory diagram illustrating an example of the printed front image 221 and the printed back image 222 that are duplex printed from the printing front image data 211 and the printing back image data 212 illustrated in FIG. 4.

  As shown in FIG. 5, the printed front image 221 and the printed back image 222 have the same pixel density as the front image data 201 and the back image data 202 shown in FIG. Has been obtained. That is, it can be seen that the influence of show-through is reduced by the processing described above.

(flowchart)
FIG. 6 is a flowchart showing processing performed by the image data processing unit 102 shown in FIG. The image data processing unit 102 that has received the processing of the front side image data 201, the back side image data 202, and the transmittance 203 = a stored in the temporary storage unit 13 from the application execution unit 101 firstly sets the value of the pixel selection variable i. Is initialized as 1 (step S301).

  Subsequently, the image data processing unit 102 determines the i-th pixel density x (i) of the front surface image data 201 and the pixel density y (i) of the back surface image data 202 printed from the back side of the point x (i). ) Is read from the temporary storage means 13 (step S302).

  Subsequently, the image data processing unit 102 applies the values of x (i), y (i) and the transmittance a to the above-described Equation 3 to obtain the pixel density x1 (i) of the printing surface image data 211. Then, the pixel density y1 (i) of the printing back image data 212 is calculated (step S303).

  Subsequently, the image data processing unit 102 generates printing front image data 211 and printing back image data 212 from the calculated x1 (i) and y1 (i), and stores them in the temporary storage unit 13. (Step S304).

  It is determined whether or not the processing in steps S302 to S304 has been performed for all the pixels of the front surface image data 201 and the back surface image data 202 (step S305). Is output to the printer 22 and output to the printer 22 (step S306), and the operation is terminated. If the processing for all the pixels has not been completed, the value of i is incremented by 1 (step S307), and the processing from step S302 is repeated.

(Overall operation of the first embodiment)
Next, the overall operation of the above embodiment will be described. In the print image processing method according to the present embodiment, front side and back side print image data is transmitted to the printer 22 capable of duplex printing, and these print image data are respectively transferred to the same printing paper surface and In the print image processing apparatus (computer 10) for printing on the back side, the pixel density of each of the given front side and back side image data is determined according to the transmittance of the print paper given in advance. The processing unit adjusts to create printing image data for the front side and the back side (FIG. 6, steps S301 to S305), and the print output unit transmits the printing image data for the front side and the back side to the printer. (FIG. 6, step S306).

Here, each of the above operation steps may be programmed to be executable by a computer, and may be executed by the computer 10 that directly executes each of the steps. The program may be recorded on a non-temporary recording medium, such as a DVD, a CD, or a flash memory. In this case, the program is read from the recording medium by a computer and executed.
By this operation, this embodiment has the following effects.

  According to this embodiment, it is possible to obtain an easy-to-read print result by reducing the influence of show-through with a printer capable of duplex printing. At the same time, this also has the effect of saving ink and toner used for printing, or saving paper resources discarded as printing failures.

(Second Embodiment)
A printer 420, which is a printing apparatus according to the second embodiment of the present invention, is a printing apparatus that prints image data for front side and back side received from a computer on the front side and the back side of the same printing paper, respectively. Front side and back side image data are received from the front side and back side image data, and front side and back side printing image data are obtained from the pixel density of each of the front side and back side image data and the transmittance of printing paper given in advance. The print image data processing unit 421 to be created and the print engine 430 that prints the print image data for the front side and the back side on the front and back sides of the same printing paper, respectively.

  Further, the printing image data processing unit 421 has x as the pixel density of a specific point in the image data for front surface, y as the pixel density of the back surface image data printed from the back surface at the same position as x on the printing paper. Assuming that the transmittance is a and the pixel densities of the printing image data for the front surface and the back surface at the same position as x are x1 and y1, respectively, x1 = (x−a × y) / (1−a ^ 2 ), Y1 = (y−a × x) / (1−a ^ 2), and print image data for front side and back side is created. (A ^ 2 is the square of a)

Also with the above configuration, it is possible to obtain the same effect as that of the first embodiment described above.
Hereinafter, this will be described in more detail.

  FIG. 7 is an explanatory diagram showing the configuration of a printer 420 that is a printing apparatus according to the second embodiment of the present invention. The printer 420 is connected to the computer 410. The hardware configuration of the computer 410 is the same as that of the computer 10 according to the first embodiment shown in FIG. FIG. 7 shows the main arithmetic control means 11 and the temporary storage means 13 extracted from them.

  The main arithmetic control unit 11 includes only the application execution unit 101 and the print output unit 103. Each of these operations is the same as that of the first embodiment shown in FIG. However, the print output unit 103 outputs the front image data 201 and the back image data 202 created by the application execution unit 101 as they are.

  Then, the printer 420 performs the same processing as the image data processing unit 102 of the first embodiment on the front surface image data 201 and the back surface image data 202 received from the print output unit 103 to print the front surface image data for printing. 211 and an image data processing unit 421 for generating the back side image data 212 for printing. The image data processing unit 421 may be software that operates with a processor built in the printer 420, or may be hardware such as a circuit dedicated to image processing. The printing sheet transmittance 203 is stored in the printer 420 in advance, but may be transmitted from the application execution unit 101 of the computer 410 as in the first embodiment.

  The printer 420 includes a print engine 430 that prints the generated print front image data 211 and print back image data 212 on the front and back of the same printing paper. Even if it is the above structures, the same effect as 1st Embodiment can be acquired. In this embodiment, since the image data processing unit 421 is provided on the printer 420 side, there is an advantage that the effect can be obtained without changing the hardware or software of the computer.

(Extended embodiment)
Each of the following can be considered as an extension of the first and second embodiments of the present invention described above. For example, any interface such as a parallel port, Ethernet (registered trademark), or USB (Universal Serial Bus) can be selected as an interface used for connection between the computer and the printer. This printer may be a so-called network printer shared by a plurality of computers connected to the network, or may be a so-called copy facsimile multifunction machine having functions such as a copier and a fax machine.

  Further, the image processing server, which is a dedicated computer, performs processing corresponding to the image data processing unit 102 on the front surface image data 1 and the back surface image data received from the other client terminals, so that the front surface image data for printing and the printing are performed. The back side image data for use may be output to a printer. A device driver incorporated in a computer OS (Operating System) for operating each printer may perform processing corresponding to the image data processing unit 102 in the first and second embodiments of the present invention. Good. In addition to this, it is possible to apply an extension of the present embodiment in various forms depending on the environment in which printing is performed by a printer.

  The present invention has been described with reference to the specific embodiments shown in the drawings. However, the present invention is not limited to the embodiments shown in the drawings, and any known hitherto provided that the effects of the present invention are achieved. Even if it is a structure, it is employable.

  Regarding the embodiment described above, the main points of the new technical contents are summarized as follows. In addition, although part or all of the said embodiment is summarized as follows as a novel technique, this invention is not necessarily limited to this.

(Supplementary Note 1) Print image processing apparatus for transmitting printing image data for front and back surfaces to a printer capable of duplex printing and printing the image data for printing on the front and back surfaces of the same printing paper, respectively Because
Printing image for creating front and back printing image data by adjusting the pixel density of the given front and back image data according to the transmittance of the printing paper given in advance A data processing unit;
A print output unit for transmitting the image data for printing on the front side and the back side to the printer;
A print image processing apparatus comprising:

(Supplementary Note 2) The back side image data printed by the printing image data processing unit from the back side at the same position as the x on the printing paper with the pixel density of a specific point in the front side image data x X1 = (x−a ×), where y is the pixel density, and a is the transmittance, and x1 and y1 are the pixel densities of the printing image data for the front surface and the back surface at the same position as x. Note that the image data for printing for the front side and the back side is created as y) / (1-a ^ 2), y1 = (y-a * x) / (1-a ^ 2) 1. The print image processing apparatus according to 1, wherein a ^ 2 is a square of a.

(Supplementary note 3) The print image processing apparatus according to Supplementary note 1 or 2, further comprising an application execution unit that executes application software and outputs the image data for the front surface and the back surface.

(Appendix 4) The print image processing apparatus according to any one of appendices 1 to 3,
A print engine that prints the printing image data for the front side and the back side created by the print image processing apparatus on the front side and the back side of the same printing paper, respectively;
A printing apparatus comprising:

(Supplementary Note 5) A client terminal including an application execution unit that executes application software and outputs image data for the front surface and the back surface;
The print image processing apparatus according to appendix 1 or 2 that receives the image data for the front surface and the back surface from the client terminal;
A print engine that prints the printing image data for the front side and the back side created by the print image processing apparatus on the front side and the back side of the same printing paper, respectively;
A printing system comprising:

(Appendix 6) The print image processing apparatus according to any one of appendices 1 to 3,
A copy facsimile multifunction printer main body that prints the image data for printing on the front side and the back side created by the print image processing apparatus on the front side and the back side of the same printing paper, respectively;
A copy facsimile multi-function machine comprising:

(Supplementary Note 7) The printer is connected to a printer capable of duplex printing, and the printing image data for the front side and the back side are transmitted to the printer, and the printing image data are respectively sent to the front side and the back side of the same printing paper. In a print image processing apparatus to be printed,
According to the transmittance of the printing paper given in advance, the printing image data processing unit adjusts the pixel density of each of the given front side and back side image data, and the front side and back side printing images Create data,
A print image processing method, wherein the print output unit transmits the print image data for the front side and the back side to the printer.

(Supplementary Note 8) The printer is connected to a printer capable of duplex printing, and print image data for front side and back side are transmitted to the printer, and these print image data are respectively sent to the front and back sides of the same printing paper. In a print image processing apparatus to be printed,
In the computer provided in the print image processing apparatus,
A procedure for creating image data for printing for the front side and the back side by adjusting the pixel density of each of the image data for the given front side and the back side according to the transmittance of the printing paper given in advance,
And a print image processing program for executing a procedure of transmitting the print image data for the front side and the back side to the printer.

  It can be used in a printer capable of duplex printing or a computer device to which such a printer is connected. The connection method between them or the printing method of the printer is not particularly limited.

DESCRIPTION OF SYMBOLS 10,410 Computer 11 Main calculation control means 12 External storage means 13 Temporary storage means 14 Data input means 15 Data output means 16 Internal bus 21 Image input device 22, 420 Printer 101 Application execution part 102, 421 Print image data processing part 103 Print output unit 201 Front surface image data 202 Back surface image data 203 Transmittance 211 Front surface image data for printing 212 Back surface image data for printing 221 Front surface image after printing 222 Back surface image after printing 430 Print engine

Claims (7)

Print image that is connected to a printer capable of duplex printing, and that prints image data for front side and back side to the printer and prints the image data for printing on the front and back sides of the same printing paper, respectively A processing device comprising:
An application execution unit that executes application software to create image data for the front side and the back side and outputs the image data and the transmittance of the printing paper;
An image data processing unit for printing that creates image data for printing for the front side and the back side from the pixel density of each of the image data for the front side and the back side and the transmittance;
A print output unit that transmits the image data for printing on the front side and the back side to the printer ;
The printing image data processing unit sets the pixel density of a specific point in the front-side image data to x, and the pixel density of the back-side image data printed from the back side at the same position as x on the printing paper. y, where the transmittance is a, and the pixel densities of the image data for printing for the front surface and the back surface after adjustment at the same position as the specific point are x1 and y1, respectively, x1 = (x−a Xy) / (1-a ^ 2) and y1 = (y-a * x) / (1-a ^ 2) to create the printing image data for the front surface and the back surface. Characteristic print image processing apparatus (a ^ 2 is a square of a) . Running an application software, characterized in that it comprises the application execution unit for outputting image data for the surface and for the back side, the printing image processing apparatus according to claim 1. A print image processing apparatus according to any one of claims 1 to 2 ,
A print engine that prints the printing image data for the front side and the back side created by the print image processing apparatus on the front side and the back side of the same printing paper, respectively;
A printing apparatus comprising: A client terminal including an application execution unit that executes application software and outputs image data for the front surface and the back surface;
A print image processing apparatus according to claim 1 2 for receiving image data for the surface and for the back side from the client terminal,
A print engine that prints the printing image data for the front side and the back side created by the print image processing apparatus on the front side and the back side of the same printing paper, respectively;
A printing system comprising: A print image processing apparatus according to any one of claims 1 to 2 ,
A copy facsimile multifunction printer main body that prints the image data for printing on the front side and the back side created by the print image processing apparatus on the front side and the back side of the same printing paper, respectively;
A copy facsimile multi-function machine comprising: Print image that is connected to a printer capable of duplex printing, and that prints image data for front side and back side to the printer and prints the image data for printing on the front and back sides of the same printing paper, respectively In the processing unit,
According to the transmittance of the printing paper given in advance, the printing image data processing unit adjusts the pixel density of each of the given front side and back side image data, and the front side and back side printing images Create data,
The print output unit transmits the printing image data for the front side and the back side to the printer ,
The step of creating the image data for printing for the front surface and the back surface is printed from the back surface at the same position as x on the printing paper with the pixel density of a specific point in the image data for the front surface being x. The pixel density of the image data for the back side is y, the transmittance is a, and the pixel density of the image data for printing for the front side and the back side at the same position as the specific point is x1 and y1, respectively. Then, the printing image data for the front surface and the back surface is set as x1 = (x−a × y) / (1−a ^ 2) and y1 = (y−a × x) / (1−a ^ 2). A printed image processing method (a ^ 2 is a square of a) characterized by being created . Print image that is connected to a printer capable of duplex printing, and that prints image data for front side and back side to the printer and prints the image data for printing on the front and back sides of the same printing paper, respectively In the processing unit,
In the computer provided in the print image processing apparatus,
A procedure for creating image data for printing for the front side and the back side by adjusting the pixel density of each of the image data for the given front side and the back side according to the transmittance of the printing paper given in advance,
And executing a procedure for transmitting the image data for printing for the front side and the back side to the printer ,
The procedure for creating the printing image data for the front surface and the back surface is printed from the back surface at the same position as the x on the printing paper, where x is the pixel density of a specific point in the image data for the front surface The pixel density of the image data for the back side is y, the transmittance is a, and the pixel density of the image data for printing for the front side and the back side at the same position as the specific point is x1 and y1, respectively. Then, the printing image data for the front surface and the back surface is set as x1 = (x−a × y) / (1−a ^ 2) and y1 = (y−a × x) / (1−a ^ 2). A print image processing program (a ^ 2 is a square of a) characterized by being created .

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