JP4937165B2 - Image forming apparatus, print preview image display program - Google Patents

Description

  The present invention relates to an image forming apparatus having a print preview display function and a print preview image display program for causing a computer to execute print preview processing.

An image forming apparatus such as a copying machine or a facsimile machine is based on printing data (image data, print job data, etc.) related to an image for one page or a plurality of pages (hereinafter referred to as a page image) read from an original. Some have a print preview function for displaying an image image (preview image) on a display unit such as a liquid crystal panel when it is assumed that a page image has been output to recording paper (image formation). This print preview function is an important function for preventing wasteful image formation against the user's will and suppressing wasteful consumption of recording paper and developer.
For example, Patent Document 1 discloses that when a print result when bookbinding is scheduled and duplex printing is performed is displayed as a preview, each page image is displayed side by side on a display unit.
Patent Document 2 discloses that a plurality of page images (reduced images) are displayed side by side on a display unit in a partially overlapped state.
JP 2004-164105 A JP-A-4-373073

  By the way, for example, in Japanese Patent Application No. 2007-013744, the present applicant turns a part of the original of a page image of a specific page in a state where it is assumed that a plurality of page images are overlapped. We have already filed a page preview display method. By displaying a part of such a page in a turned state, many pages can be displayed on one monitor screen. For example, if a page with left and right spread pages is displayed with a part of the left page and a part of the right page turned over, the image for four pages at a time, although it is partially hidden Can be displayed, and the effect of the page preview of simply peeking at the page can be further improved.

On the other hand, in double-sided printing or single-sided printing, it is desirable that what image (color character, color image, etc.) is included in each page can be confirmed by a preview image before actual printing (image formation). This is because if one prints black without knowing that there are color images in multiple pages, the quality and quality of the color image cannot be maintained. This is because the color printing mode can be selected.
The same applies to cases where photographic images are included in multiple pages. If the user can easily check whether photographic images are included in multiple pages prior to printing, the user can However, it is possible to select an appropriate print mode.

  However, when previewing a print result of a plurality of pages, as described in Japanese Patent Application No. 2007-013744, a part of the page is turned when the page image is partially turned. If there is a color image or a photographic image in the hidden part, the user sets the type of printing without knowing that these special images exist, so the appropriate print that the user wants There is a new problem that sometimes cannot be set.

  Therefore, the present invention has been made in view of the above circumstances, and the object of the present invention is to confirm using the preview display function in the turned state as described above before printing a plurality of pages. In addition, it is possible to provide an image forming apparatus and a print preview image display program provided with a preview image display means capable of intuitively and surely grasping whether a plurality of pages contain color images or photographic images. It is in.

In order to achieve the above object, an image forming apparatus according to the present invention uses a print preview image of a page image as a display unit based on print data relating to page images for a plurality of pages stored in a predetermined storage unit. In addition to the conventionally known functions to be displayed, each component shown in the following (1) to (3) is further provided.
(1) A page specifying means for specifying one page of the page image based on information input through a predetermined operation unit.
(2) The page image of the specified page in a state where a part of the page image of the page specified by the page specifying means in a state where it is assumed that a plurality of recording materials are stacked is turned over. Causing the display means to display the print preview image including a first area corresponding to a portion that has not been turned over and a second area that corresponds to a page image that has been made visible by being turned over. Preview output means.
(3) When a color image or a photographic image is included in the entire page image including the first area or the entire page image including the second area, the color image or the photographic image Image shift means for shifting a page image including the color image or photographic image so that a portion is displayed in the first area or the second area.
According to the print preview image displayed by the image forming apparatus according to the present invention, a preview image in which a part of the plurality of pages (specified pages) is turned over is displayed. This preview image always includes a portion (second region) that can be seen by being turned over, and a portion that remains visible because it has been turned over (first region). It is out.

  As for the first area, if a color image or a photographic image (hereinafter referred to as a color image) is included in the first area, the user can visually recognize the color image without difficulty. However, the part of the page image that includes the first area is turned off because it is turned over, so even if there is a color image or the like in the part that has disappeared, that part is not visible. Therefore, it cannot be visually recognized. Therefore, in the present invention, the page image of the specified page is automatically shifted so that the color image portion of the specified page is displayed in the first area. As a result, the user can easily and intuitively and accurately know that a color image is included in the specified page, and can instruct printing in a mode suitable for the color image.

Considering the second area, the second area is a partial area included in the page on the back side of the specified page, and the next (or next) of the recording material including the specified page (or There are two cases where it is a partial area included in the previous recording material.
Considering the former case, if a color image or the like is included in the second area itself, the user can visually recognize the color image or the like without difficulty. However, since the portion excluding the second area of the page including the second area is the back side of the specified page, it is not displayed on the preview screen except for the second area. I can't. Therefore, when a color image or the like is included in this invisible portion, it is desirable to shift the color image portion to the second region so that it can be seen by the user.

As for the latter, if the second area itself includes a color image or the like, the user can easily see the color image or the like, but the above-described page of the page including the second area is not affected. The portion excluding the second region is the surface of the next recording material hidden behind the specified page or the surface of the recording material before the recording material of the specified page. Otherwise, it is not displayed on the preview screen and cannot be viewed. Therefore, when a color image or the like is included in this invisible portion, it is desirable to shift the color image portion to the second region so that it can be seen by the user.
Of course, in the case of the former and the case of the latter, only one of them does not occur, but when multiple pages are overlapped, both occur at the same time. It is desirable to shift so that the user can see a color image or the like.

The preview output means displays the print preview image in which the page image of the page immediately before the page specified by the page specifying means and the specified page including the flipped image are arranged in a spread state. Of course, it may also be displayed on the display means.
In either case, when a color image or the like is included in the hidden portion, the page image is shifted so that the color image is displayed in the first or second region.

  Various methods for confirming whether the color image or the photographic image is included are conceivable, but detection is generally performed by a well-known auto color scan.

  As to which part of the detected color image or the like is desired to be visible, the image shift means selects the first or first part where the color image or the photographic image is first detected by the auto color scan. It is considered the simplest to shift the page image so that it is displayed in area 2.

  Even the same color image may have different importance for the user. Generally, it is considered that important parts are often displayed in red during work. Next, it is often colored green. Therefore, it is important that the image shifting means shifts the page image so that the portion having the largest number of red or green images in the unit area in the page is displayed in the second area.

  The same applies to photographic images, in which the image shifting means shifts the page image so that the portion of the page having the largest number of photographic images in the unit area is displayed in the first or second region. , It is considered that there is a profit.

  The present invention also relates to a print preview image display program of an image forming apparatus that displays a print preview image of the page image on a display unit based on print data relating to page images for a plurality of pages stored in a predetermined storage unit. The same applies.

  According to the present invention, by displaying a feature such as a red image that could not be seen simply by being turned over so that it can be seen in a portion that can be seen by turning it over, the entire turned page is characteristic. If a red image is included, it is displayed in the area that is visible when the red image is turned, so the operator intuitively recognizes what feature image the page contains can do. As a result, the operator can quickly make a high-level judgment as to whether color printing should be performed or whether black-and-white printing is sufficient in subsequent print settings.

Hereinafter, an embodiment in which the present invention is applied to a preview screen for double-sided printing will be described with reference to the accompanying drawings for understanding of the present invention. Of course, the present invention is applicable to both single-sided printing and double-sided printing. This point will be described in detail later. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
FIG. 1 is a block diagram showing the configuration of the main part of the image forming apparatus X according to the embodiment of the present invention, FIG. 2 is a flowchart showing the procedure of print preview display processing in the image forming apparatus X, and FIG. FIG. 4 is a diagram showing an example of a print preview screen in the image forming apparatus X (showing a state in which the page is not turned over), and FIG. 4 is a view of the print preview screen showing a state in which the color image portion is moved to a visible position by shifting the page image. FIG. 5 is a diagram illustrating an example, FIG. 5 is a diagram illustrating an example of a print preview screen in a double-open state in the image forming apparatus X, and FIG. 6 is an all-page image (a) before the image is shifted and a second image after the shift. It is a figure which shows the image (b) of the area | region.

An image forming apparatus X according to an embodiment of the present invention is an image forming apparatus such as a copying machine, a printer, or a facsimile machine, and prints a plurality of pages of page images stored in advance in a data storage unit such as a hard disk. A print preview function for displaying a print preview image of the page image on the display unit based on the data for use is provided.
First, the structure of the main part of the image forming apparatus X according to the embodiment of the present invention will be described with reference to the block diagram shown in FIG.
The image forming apparatus X is a so-called multifunction machine having a scanner function, a print function, a copy function, and a facsimile function.
As shown in FIG. 1, the image forming apparatus X includes a main control unit 1, an operation / display unit 2, a data storage unit 3, an image processing calculation unit 4, a NIC 5, a scanner unit 6, a printing unit 7, a facsimile unit 8, and the like. They are connected in such a way that information can be exchanged through the bus 11.

The operation / display unit 2 includes an operation unit 2a for inputting information and a display unit 2b for displaying information (including images). The operation unit 2a is, for example, a touch panel or a sheet key provided on the surface of the liquid crystal display device. The display unit 2b is, for example, a liquid crystal display device. The operation / display unit 2 constitutes a man-machine interface for the user.
The data storage unit 3 is a readable / writable large-capacity non-volatile memory that stores processing data as necessary when processing image data obtained by reading from a document or printing processing of image data. .

  The image processing arithmetic unit 4 is constituted by a dedicated signal processing circuit or a DSP (Digital Signal Processor) or the like, performs various image processing on the image data, and forms a print job described in a predetermined print job description language into an image. A process for converting to bitmap image data to be used, a process for generating image data to be transmitted to an external device (for example, image data subjected to predetermined encoding such as JPEG format), and the like are performed.

The NIC 5 receives data (including data of an image read by the scanner unit 6) with an external device such as an information processing terminal or an e-mail server through a network including a LAN and the Internet conforming to the standard IEEE 802.3, for example. It is a communication interface which transmits / receives.
The scanner unit 6 converts an image formed on a document from a document placed on a glass document table (not shown) or a document conveyed by an ADF (not shown) to a color (R, G, B). ) Is a color scanner that distinguishes and reads.

The print unit 7 is a so-called print engine controlled by the main control unit 1, and sequentially feeds recording sheets stored in a sheet feeding cassette (not shown) one by one, and passes through a predetermined image forming position to a sheet discharge tray. Recording paper (recording paper) based on the image data of the original read from the original by the scanner unit 6 and the image data for printing generated by the image processing calculation unit 4 at the image forming position. It is a set of components such as a device that forms (outputs) an image on an example) and an MPU that controls the device. The printing unit 7 has a function of executing double-sided printing processing for forming an image on both the front surface and the back surface of the recording paper.
The facsimile unit 8 includes communication means such as an NCU (Network Control Unit) and a modem, and performs dial-up and negotiation processing for determining a communication method with a communication partner (partner station). It transmits and receives facsimile data (image data read by the scanner unit 6) with the facsimile apparatus.

The main control unit 1 controls each of the scanner unit 6, the print unit 7, the facsimile unit 8, the operation / display unit 2, the data storage unit 3, and the image processing calculation unit 4.
For example, the main control unit 1 causes the printing unit 7 to execute a printing process (image forming process) based on a print job received through the NIC 5. Further, the main control unit 1 causes the facsimile unit 8 to execute a facsimile transmission process for calling a designated transmission destination telephone number and transmitting image data to be transmitted. Further, the main control unit 1 causes the scanner unit 6 to execute a scanning process for reading an image formed on the original from the original.
Further, the main control unit 1 is based on printing data (image data, print job data, etc.) relating to an image for one page or a plurality of pages (hereinafter referred to as page image) read from the document by the scanner unit 6. Print preview processing is also executed for causing the display unit 2b to display an image image (preview image) when the page image is output (image formation) to the recording paper.

Next, the procedure of the print preview process executed by the image processing apparatus X will be described with reference to the flowchart shown in FIG. 2 and the example of the print preview screen shown in FIGS.
It is assumed that printing data is stored in advance in the data storage unit 3 (an example of a predetermined storage unit) before the processing shown in FIG. 2 is executed. As described above, the print data is a print job input from the external device through the NIC 5 or image data read by the scanner unit 6. S1, S2,... Shown below represent identification symbols of processing procedures (steps).

First, the main control unit 1 displays a predetermined initial menu screen on the display unit 2b (S1), and monitors whether or not an operation for selecting a processing item in the initial menu has been performed through the operation unit 2a (S2). ).
When the main control unit 1 detects that an operation for selecting any processing item is performed during the display of the initial menu, the main control unit 1 executes a process corresponding to the operation.
That is, when the operation for the initial menu is an operation for requesting print preview display processing (print preview operation), the main control unit 1 sets an initial value (= 1) for a variable i representing a page number. Above (S3), it is determined whether or not the printing data stored as a processing target in the data storage unit 3 is data for double-sided printing that has been selected in advance as a target for double-sided printing (S4). .
The double-sided printing data is print job data or read image data relating to page images for a plurality of pages.
The variable i is a variable representing a page of one page image formed on the surface of the recording paper when printing described later is performed. In addition, the main controller 1 that executes the process of step S3 specifies the value of the variable i based on information (information requesting print preview display) input through the operation unit 2a. Specifically, it is realized by a page designation key to be described later.

  When the main control unit 1 determines in step S4 that the printing data is double-sided printing data, the main control unit 1 selects pages (i-1) to (i + 2) based on the double-sided printing data. Data for four page images is generated and stored in the data storage unit 3 (S5). In step S5, it is needless to say that image data relating to pages not included in the double-sided printing data among the page images for four pages from the (i-1) page to the (i + 2) page is not generated. .

  The display unit 2b includes a key group g4 including a first page key, previous page key, last page key, next page key, and page designation key, a left turn key g5L, and a right turn next to the preview image g1. When the key g5R and further the end key g6 are displayed and each key is pressed, the first page key jumps the displayed page to the first page, and the previous page key displays one page. Moves to the previous page, the last page key moves to the last page, the next page key moves to the next page, and the page designation key moves to the specified page. When the left turn key g5L is pressed, a part of the left page among the displayed left and right pages is turned over. When the right turn key g5R is pressed, the displayed left and right pages are displayed. A part of the page on the right side of the page is turned over. Further, when the end key g6 is pressed, the preview screen is closed.

  When the processing of S5 is completed, the main control unit 1 (an example of the preview output means in the present invention) reads the page variable i specified by the page designation key in the display unit 2b (S6), and this specification A preview image corresponding to the page variable (corresponding to the number of pages) is displayed (S7).

  FIG. 3 shows an example of a state where the page image of (i−1) page does not exist because page variable i = 1, and FIG. 5 shows a case where page variable i = 4 and (i−1) from page (i + 2). This is an example in the case where there are page images for four pages up to (pages 3 to 6). In FIG. 5, the page has already been turned over, but at the beginning of the startup, it starts from a preview display state with no turning as shown in FIG.

  Subsequently, the main control unit 1 determines whether either the left turning key g5L or the right turning key g5R displayed on the display unit 2b is pressed (S8). When any turning key is pressed, prior to displaying the preview image including the turned-up portion, the entire page image including the first area described later or the page image including the second area described later is included. Whether or not a color image or a photographic image is included in the whole image is determined by performing well-known auto color scanning (S9).

The meanings of the first region and the second region are as follows.
That is, regardless of whether the printing is duplex printing or simplex printing, the main control unit 1 in the preview display specifies the page specified by the page designation key in a state where a plurality of recording materials are assumed to be stacked. A first area corresponding to a non-repeated portion of the page image of the specified page in a state in which a part of the page image is turned over, and a page that is made visible by being turned over The print preview image including the second area corresponding to the image is displayed on the display means.
An example of preview output means in the present invention is to display a turning state centered on a specified page in accordance with such pressing of the turning key.
This will be described with reference to the example shown in FIG.
In this figure, the first page is displayed at the top, and therefore the specified page is 1 (page variable i = 1). The lower right corner of the first page image is turned over. In this case, since the specified page is one page, the portion R1 excluding the portion R2 that is made visible by turning over the entire first page is an example of the first region. The portion R2 that can be seen by being turned over is an example of the second region. In this case, the second area is a partial area on the back side (that is, the second page) of the specified page (first page).
However, in this case, the portions R1 and R2 of the third page (that is, the page on the surface of the recording material next to the recording material on which the specified page is recorded) are excluded (the portions hidden by R1 and R2 are excluded). The portion R3 is also an example of the second region because it is one of the portions that can be seen by being turned over.
The place to be turned is not limited to the lower right side of the page described above, but may be the lower left turn shown by the broken line in FIG. In this case, the first region is R1 'and the second region is R2' and R3 '.

FIG. 5 shows a case of left and right spread, in which the page image of the page immediately before the page specified by the page specifying means and the specified page including the flipped image are arranged in a spread state. This is a case where a print preview image is displayed on the display means.
In this case, the specified page is four pages. Since the specified page is four pages, the parts R5 and R6 that are newly visible by turning the lower right are the second areas, and the pages excluding the parts that are not visible by turning the part R5. The fourth portion R4 is the first region in this case.
In this case, since it is a left-right spread, the left half page, that is, the third page may be specified. Since the specified pages are three pages, the portions R2 ′ and R1 ′ that are newly visible by turning the lower left as indicated by the broken line L are the second region. That is, the second area is a part of the surface of the recording material before the recording material including the specified page.
Further, the portion R3 ′ of the page 3 excluding the portion that has become invisible due to the turning of the portion R2 ′ is the first region in this case.
Thus, it seems that the meanings of the first and second areas have been understood, so the description returns to S9 again.

Auto color scanning is performed on the entire page image including the first region and / or the entire page image including the second region.
FIG. 4 and FIG. 5 are specifically shown as to which part the entire page image including the first region and the entire page image including the second region are.

[About Figure 4]
The entire page image including the first region is the entire page image including the R1 portion, and is therefore the reverse page of the R1 region and the R2 portion, that is, the previous page image of the first page. .
The entire page image including the second region is a page including the R2 portion, that is, the entire page image of the second page and a page including the R3 portion, that is, the entire page image of the third page. is there.
However, either the entire second page or the entire third page may be used, but scanning for both is preferable for the user because the presence of a color image or the like can be confirmed for all of the first to third pages. It is an embodiment.

[About Figure 5]
In the same way, the entire page image including the first area in FIG. 5 is the entire page 4 when the specified page is 4, and the specified page is 3 pages when the specified page is 3 pages. The whole.
Further, the entire page image including the second area is the entire page of the fifth page and the entire page of the sixth page when the specified page is four pages.
When the specified page is three pages, it is the entire second page and the entire first page.

Here, the detection target is a red image. This is because there is a tendency to use red for the feature portion of the sentence, but since the feature portion is also discriminated from others with green, the green color may be detected. Of course, other colors such as yellow may be used, but from the point of view of the present invention in which attention is paid to characteristic parts as much as possible, red or green, which is generally performed to emphasize the characteristic parts, is desirable.
Of course, an image such as a photographic image may be set. Since the method for determining whether or not the image is a photographic image is well known, it is omitted here.
If a red image portion is detected (YES in S10), the main control unit 1 determines whether or not the page on which the red image is detected is the back portion in the current preview display state. Judgment is made (S11).
Here, when the page image is the back side, the image is reversed so that the characters in the page are correctly turned to the front, that is, the direction in which the user can read (S12).
This is because, on the opposite page, the judgment as to whether it is a photographic image or the like tends to be inaccurate.

  Further, the main control unit 1 starts first when the red image detected in S10 is detected in the page including the first region with respect to the inverted image (the image that is not inverted unless it is the back side). The entire page image is shifted so that the detected red image is in the center of the first area. Further, when the red image detected in S10 is detected in a page including the second area, the entire page image inverted so that the detected red image comes to the center of the second area. Is shifted (S13), and a preview of the shifted image is displayed (S14).

Details of the preview display at this time are shown in FIG. In FIG. 6, (a) shows only the part of “* Important XX” (shown in bold) shows the original page expressed in red, and can be seen by turning (b) over. The second area shifted so as to be able to be displayed is shown, and the red “* Important XX”, which is the above-mentioned characteristic part, is displayed at the center of the area.
Various methods can be used to determine when to shift the feature such as red at which point. For example, it is possible to shift the page image so that the portion of the page having the largest number of red or green images in the unit area is displayed in the first or second region.
Further, the page image may be shifted so that the portion having the largest number of photographic images in the unit area is displayed in the first or second region.
As for the position to be shifted, it is easy for the user to shift to the center of the first or second region which is most easily understood.

  If no red image is detected in S10 (NO in S10), the process of S11 to S13 is bypassed and an image without a shift is displayed as a preview (S14).

  By displaying so that features such as a red, green image, or photographic image that could not be seen simply by being turned over as described above can be seen, a red image with a characteristic on the entire turned page can be obtained. If it is included, the red image is displayed in the area that is made visible by turning, so that the operator can intuitively recognize what kind of feature image the page contains. it can. As a result, the operator can quickly make a high-level judgment as to whether color printing should be performed or whether black-and-white printing is sufficient in subsequent print settings.

  Since the user can check the presence or absence of a color image or a photograph by looking at the preview screen, an appropriate print mode can be easily set based on this information and the print process can be executed (S15). ).

  In the above embodiment, the image forming apparatus having the special preview display method as described above has been described. However, the above method is basically a process of the main control unit 1, and the main control unit 1 By installing a program created to perform the process, processing is executed according to this program. Therefore, it can be understood that all of the above processes can be grasped as a program itself for performing the above processes, and the present invention can be recognized as an invention of such a program.

  The present invention can be used for an image forming apparatus and a program for causing a computer to execute print preview display processing.

1 is a block diagram illustrating a configuration of a main part of an image forming apparatus X according to an embodiment of the present disclosure. 6 is a flowchart showing a procedure of print preview display processing in the image forming apparatus X. FIG. 6 is a diagram illustrating an example of a print preview screen in the image forming apparatus X (showing a state where the print preview screen is not turned over). FIG. The figure showing an example of the print preview screen which shows the state which moved the color image part to the position which can be seen by the shift of a page image. 3 is a diagram illustrating an example of a print preview screen in a double-open state in the image forming apparatus X. FIG. The figure which shows the whole page image (a) before shifting an image, and the image (b) of the 2nd area | region after shifting. The figure which shows the whole page image (a) before shifting an image, and the image (b) of the 2nd area | region after shifting.

Explanation of symbols

X: Image forming apparatus 1: Main control unit 2b: Display unit 3: Data storage unit 4: Image processing calculation unit 5: NIC (network interface card)
R1, R2,... Parts S1, S2,...: Identification symbols of processing procedures (steps)

Claims (11)

An image forming apparatus for displaying a print preview image of the page image on a display unit based on print data relating to page images for a plurality of pages stored in a predetermined storage unit,
Page specifying means for specifying one page of the page image based on information input through a predetermined operation unit;
The page image of the specified page is turned over in a state where a part of the page image of the page specified by the page specifying means in a state where it is assumed that a plurality of recording materials are stacked. Preview output means for causing the display means to display the print preview image including a first area corresponding to a non-existing portion and a second area corresponding to a page image that is visible by turning over;
When a color image or a photographic image is included in the entire page image including the first region or the entire page image including the second region, the color image or photographic image portion is An image forming apparatus comprising image shift means for shifting a page image including the color image or photographic image so as to be displayed in the first area or the second area.   The image forming apparatus according to claim 1, wherein the second area is a part of a back side of the specified page.   The image forming apparatus according to claim 1, wherein the second area is a part of a surface of a recording material next to the recording material including the specified page.   The image forming apparatus according to claim 1, wherein the second area is a part of the surface of the recording material before the recording material including the specified page.   The preview output means displays the print preview image in which the page image of the page immediately before the page specified by the page specifying means and the specified page including the flipped image are arranged in a spread state. The image forming apparatus according to claim 1, wherein the image forming apparatus is displayed on a display unit.   6. The image forming apparatus according to claim 1, wherein whether or not the color image or the photographic image is included is detected by an automatic color scan.   The image shift means shifts a page image so as to display a portion where a color image or a photographic image is first detected by the auto color scan in the first or second area. Image forming apparatus.   The image shift means shifts the page image so that a portion having the largest number of red or green images in a unit area in the page is displayed in the first or second region. 8. The image forming apparatus according to any one of.   The image shift means shifts the page image so that the portion having the largest number of photographic images in the unit area in the page is displayed in the first or second region. An image forming apparatus according to claim 1.   The image shift means reverses the orientation of the image to a direction that can be read from the front when the page image displayed in the second area is an image on the back side of the specified page. The image forming apparatus according to any one of the above. A print preview image display program of an image forming apparatus for causing a display means to display a print preview image of the page image based on print data relating to page images for a plurality of pages stored in a predetermined storage unit,
A page specifying step for specifying one page of the page image based on information input through a predetermined operation unit;
The page image of the specified page is turned over in a state where a part of the page image of the page specified by the page specifying means in a state where a plurality of recording materials are assumed to be stacked. A preview output step for causing the display means to display the print preview image including a first area corresponding to a non-recognized portion and a second area corresponding to a page image that is visible by turning over;
In the print preview image display program in the image forming apparatus that displays the print preview image,
When a color image or a photographic image is included in the entire page image including the second area, the color image or the photographic image portion is displayed in the second area. A print preview image display program for causing a computer to execute an image shift process for shifting a page image including an image or a photographic image.

Images