JP5231318B2 - Image processing apparatus, image reading processing apparatus, image forming apparatus, image processing program, and recording medium - Google Patents

Description

  The present invention relates to an image processing apparatus, an image reading processing apparatus, an image forming apparatus, an image processing method, an image processing program, and a computer-readable recording medium that display thumbnails and previews of input image data.

  An image forming apparatus such as a copier or a multi-function printer converts image data indicating an image to be printed in accordance with a document type and setting conditions (print density, scaling ratio, single-sided or double-sided printing, margin size, etc.). Apply image processing. Further, some image forming apparatuses display a preview of an image to be printed on a display unit of a display device based on the image data subjected to the image processing. The preview display mode includes a mode in which an image to be printed is displayed one page at a time on the display unit and a mode in which an image to be printed consisting of a plurality of pages is displayed on the display unit at a time.

  Japanese Patent Application Laid-Open No. 2004-133867 discloses a monochrome image that is output by using cyan (C), magenta (M), and yellow (Y) toners in which a previewed image is color-processed for each of a plurality of original images. Or a black and white image output using black (Bk) single color toner, and the determination result is displayed on the preview image, and the preview image is output using the toner represented by the determination result. In addition, an image processing apparatus is disclosed that can accept designation from a user as to whether or not to output using toner different from the toner.

  Further, in Patent Document 2, it is determined whether or not a document represented by a document image is a blank sheet for each of a plurality of document images. An image reading system is disclosed that displays a setting screen that allows a user to perform setting for saving / non-storing for each document image at the time of previewing, with the default setting for saving the determined document image.

Japanese Patent No. 3938549 (released on August 12, 2004) JP 2007-208618 A (released on August 16, 2007)

  However, in the above-described conventional configuration, when a plurality of document types are determined as a result of determining the document type for a plurality of documents whose images have been read, only the preview display image of the document corresponding to one of the document types is confirmed. However, even if the user desires, it is not easy to find out the corresponding preview display image from all the preview display images. This problem becomes more prominent as the number of originals from which images are read increases.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to easily provide a user with a preview display image of a document corresponding to a specific document type even if the number of documents scanned is large. An object is to realize an image processing apparatus that can be confirmed.

In order to solve the above problem, an image processing apparatus according to the present invention includes an image print job, an image transmission job, and an image filing job from input image data obtained by reading an image of a document with an image reading apparatus. An image processing apparatus comprising output control means for generating output image data handled by any job and outputting the output image data to a job apparatus that executes the job, each of a plurality of originals read by the image reading apparatus A document type determining means for determining which of the plurality of predetermined document types the document type of the document corresponds to based on the input image data representing the document; The means reads one of the plurality of document types obtained as a result of the determination by the document type determination unit with respect to the document from which the image has been read. Only relevant document, generates display image data for displaying a preview of the image in the image display apparatus is characterized in that output to the image display device.

  According to the above configuration, the image processing apparatus corresponds to one document type when there are a plurality of document types in the document types determined for each of the plurality of documents read by the image reading device. Only the document is previewed on the image display device.

  Thereby, the image processing apparatus has an effect that the user can easily confirm the preview display image of the document corresponding to one document type.

  In order to solve the above-described problems, the image processing apparatus of the present invention can perform an image print job, an image transmission job, and an image filing job from input image data obtained by reading an image of a document as a color with an image reading apparatus. An image processing method including an output control step of generating output image data handled by any one of the jobs and outputting the output image data to a job device that executes the job, and a plurality of documents read by the image reading device A document type determining step for determining which of the plurality of predetermined document types the document type of the document corresponds to based on the input image data representing the document, In the output control process, for the document whose image has been read, the plurality of document types obtained as a result of the determination in the document type determination process. Only the original corresponding to one of the document type, generates display image data for displaying a preview of the image in the image display apparatus is characterized in that output to the image display device.

  According to said structure, there exists an effect similar to the image processing apparatus of this invention.

  In the image processing device, the output control unit displays the document type on each of the plurality of document types obtained as a result of the determination on the image display device, and among the documents from which the image is read, the document type It is desirable to display the number of documents corresponding to the above on the image display device.

  According to the above configuration, for each document type, the user recognizes the difference between the number of documents that is assumed to be determined to be the document type and the number of documents that are actually determined to be the document type. Therefore, the image processing apparatus has an additional effect that the user can easily find the erroneously determined document.

  In the image processing apparatus, based on color image data that is input image data obtained by the document type determination unit reading the image of the document as a color with the image reading device, the document is a color document. It is desirable to include color / monochrome determination means for determining whether the document is a monochrome document or not.

  According to the configuration described above, the image processing apparatus has an additional effect that the user can easily confirm only the preview display image of the color document or only the preview display image of the monochrome document.

  In the image processing apparatus, it is preferable that the document type determination unit includes a blank document determination unit that determines whether or not the document is a blank document based on the input image data.

  According to the above configuration, the image processing apparatus has an additional effect that the user can easily confirm only the image of the blank document.

  In the image processing apparatus, when the output control unit is a document that is determined to be the blank document by the blank document determination unit, the image processing apparatus generates the display image data only for the document and generates the image. Instead of outputting to the display device, the display image data may be generated and output to the image display device for the original and at least one of the originals read before and after the original. desirable.

  According to the above configuration, the image processing apparatus displays a preview of the image of the document determined to be a blank document on the image display device, and when the document is a document first read by the image reading device. The image of the original that was read one page after is also displayed as a preview, and if it is the last document that was read, the image of the original that was read one page before is also displayed as a preview, and the second page excluding the document that was read last In the case of a document read after that, a preview image is also displayed of the image of the document read either before or after or both.

  As a result, the user can know what kind of document is read before and after the document determined to be a blank document, so that the image processing apparatus reads the document read from the document determined to be a blank document. There is a further effect of making it easy for the user to find out from the list.

  In the image processing device, the output control means uses the display image data when the document whose preview is displayed on the image display device is a blank document determined by the blank document determination means. For a certain first display image data, a gradation difference with a gradation value representing the original color of the blank document is not more than a predetermined threshold value, and a gradation value different from the gradation value is more It is desirable to output the second display image data obtained by conversion so as to increase to the image display device.

  According to the above configuration, for the document determined to be a blank document, the image processing apparatus has an area in which a gradation difference from the gradation value of the document color is equal to or less than a predetermined threshold and an area of the document color Can be easily identified by the user.

  Therefore, the image processing apparatus can be used for characters, pictures, etc. that are mostly composed of gradation values whose gradation difference from the original color gradation value is a predetermined threshold value or less (that is, characters, pictures, etc. that are difficult to confirm). ) Can be easily confirmed by the user.

  Thereby, the image processing apparatus has an additional effect that the user can easily confirm that the document intended to output the character, the picture, or the like is determined to be a blank document.

  In the image processing apparatus, it is preferable that the output control unit displays on the image display device what number the original on which the display image data has been read is read by the image reading device.

According to the above configuration, the image processing apparatus has an additional effect that it is easy for the user to find out from the originals obtained by reading the previewed original.

  The image processing apparatus is a document type accepting unit that accepts a document type setting for generating output image data in accordance with the setting from a user, and the document original on which the image display device displays an image preview It is desirable to further include document type accepting means capable of accepting a document type setting different from the type from the user.

  According to the above configuration, the image processing apparatus receives a document type setting different from the document type determined for the preview-displayed image from the user, and outputs output image data according to the received document type setting. .

  Therefore, when the determined document type is not the original document type intended by the user, the image processing apparatus has an additional effect of allowing the user to output the output image data with the original document type setting. .

  The present invention may also be an image reading processing apparatus including the image processing apparatus and the image reading apparatus, or an image forming apparatus having the image processing apparatus and the job apparatus, wherein the job apparatus is a printing apparatus. It may be.

  The image processing apparatus may be realized by a computer. In this case, an image processing program for realizing the image processing apparatus in the computer by operating the computer as each of the above means and a computer-readable recording medium on which the image processing program is recorded also fall within the scope of the present invention.

  As described above, the image processing apparatus according to the present invention uses any one of an image print job, an image transmission job, and an image filing job from input image data obtained by reading an image of a document with an image reading apparatus. An image processing apparatus comprising output control means for generating output image data handled by a job and outputting the output image data to a job apparatus that executes the job, wherein each of a plurality of originals read by the image reading apparatus A document type determining means for determining which one of the plurality of document types corresponds to the original document type based on the input image data representing the original, and the output control means comprises: For a document from which the image has been read, a document corresponding to one document type among a plurality of document types obtained as a result of determination by the document type determination unit. Only, it generates display image data for displaying a preview of the image in the image display device, and outputs to the image display device.

  Therefore, the image processing apparatus has an effect that the user can easily confirm the preview display image of the document corresponding to one document type.

FIG. 2 is a block diagram illustrating an image forming apparatus according to the present exemplary embodiment, and is a block diagram illustrating a flow of image data when printing processing is performed in a copier mode and a full color mode. (A) is a block diagram showing a part of the image processing apparatus when printing processing is performed in the copier mode and the single color mode, and (b) is a printing in the copier mode and the two-color mode. It is the block diagram which showed a part in the image processing apparatus at the time of a process being performed. FIG. 3 is a block diagram illustrating an original document type automatic determination unit provided in the image forming apparatus of the present embodiment. FIG. 2 is a block diagram illustrating an image forming apparatus according to an exemplary embodiment, and is a block diagram illustrating a flow of image data when preview display processing is performed in a copier mode and a full color mode. (A) is a block diagram showing a part of the image processing apparatus when preview display is performed in the copier mode and the single color mode, and (b) is a preview in the copier mode and the two-color mode. It is the block diagram which showed a part in the image processing apparatus at the time of display. (A) is the figure which showed an example of the gamma curve according to the display characteristic of an image display apparatus. (B) is a figure which showed the gamma curve for displaying a character clearly as a continuous line, and showed the gamma curve according to the display characteristic of the image display apparatus with the broken line. 6 is a flowchart illustrating a processing procedure of the image forming apparatus when a copier mode and a full color mode are selected. It is the figure which showed the screen for instructing the preview display in copier mode. FIG. 5 is a diagram for describing document data stored in a storage device for a document read by the image forming apparatus of the present embodiment for job output processing or preview display processing. (A) is a diagram showing a document type selection screen for selecting a document to be previewed, and (b) to (f) are diagrams showing preview display screens displayed according to the selected document type. . FIG. 6 is a diagram showing a screen for setting a document type different from a determined document type and displaying a preview for a selected document. FIG. 10 is a diagram showing a document type selection screen for selecting a document to be previewed. FIG. 5 is a diagram illustrating an example of a gamma curve of gamma correction performed by an output tone correction unit on image data of a document determined to be a blank document or a document set as a blank document by a user. FIG. 2 is a block diagram illustrating an image forming apparatus according to the present exemplary embodiment, illustrating a flow of image data when performing transmission processing in a facsimile transmission mode. FIG. 2 is a block diagram illustrating an image forming apparatus according to the present exemplary embodiment, illustrating a flow of image data when preview display processing is performed in a facsimile transmission mode. 1 is a block diagram illustrating an image forming apparatus according to an exemplary embodiment, and is a diagram illustrating a flow of image data when print processing is performed in a facsimile reception mode. FIG. 2 is a block diagram illustrating an image forming apparatus according to the present exemplary embodiment, illustrating a flow of image data when preview display processing is performed in a facsimile reception mode. It is a block diagram showing a modification of the image forming apparatus of the present embodiment. FIG. 2 is a block diagram illustrating an image forming apparatus according to the present exemplary embodiment, and is a block diagram illustrating a flow of image data when printing processing is performed in a copier mode and a monochrome mode. FIG. 2 is a block diagram illustrating an image forming apparatus according to the present exemplary embodiment, and is a block diagram illustrating a flow of image data when preview display processing is performed in a copier mode and a monochrome mode.

  An embodiment of the image forming apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a schematic configuration of an image forming apparatus 100 according to the present embodiment.

  The image forming apparatus 100 according to the present embodiment is a digital color composite that executes a selected mode when any one of a copier mode, a print mode, a facsimile transmission mode, a facsimile reception mode, and an image transmission mode is selected. Machine.

The copier mode (copying mode) means a mode for reading image data (reading a document to generate image data) and printing an image of the image data on paper. The print mode means a mode in which an image of image data sent from a terminal device connected to the image forming apparatus 100 is printed on paper. The facsimile transmission mode means a normal facsimile mode in which image data obtained by reading a document is transmitted to an external device through a telephone line, and an Internet facsimile mode in which the image data is attached to a mail and transmitted over the Internet. The facsimile reception mode means a mode in which image data is received from an external device by facsimile and an image of the received image data is printed on paper. The image transmission mode is (1) a mode in which image data generated by scanning a document is attached to an e-mail and transmitted to a specified address (scan to e-mail mode), and (2) generated by scanning a document. A mode in which image data is transmitted to a folder designated by the user (scan to ftp mode), and (3) a mode in which image data generated by reading a document is transmitted to a USB memory or the like attached to the image forming apparatus 100 (scan to usb mode). In the present embodiment, the facsimile transmission mode and the image transmission mode are classified as described above from the viewpoint of the image processing operation.

  When the copier mode / print mode is selected, the user outputs a monochrome image that outputs a monochrome image, a full color mode that outputs a full color image, or a single color image composed of only one color desired by the user. Either a single color mode or a two-color mode for outputting a two-color image composed of one color desired by the user and black can be selected.

  For example, in the copier mode or the print mode, when the user selects the single color mode, the single color image is printed. When the user selects the two-color mode in the copier mode or the print mode, the image data of the two-color image is printed. In the single color mode or the two-color mode, the user can select a desired color from R (red), G (green), B (blue), C (cyan), M (magenta), and Y (yellow). One color will be selected.

  In this embodiment, the automatic discrimination mode can be set in the copier mode. When the automatic determination mode is set, the image forming apparatus 100 performs an automatic color determination process (ACS) and a blank document determination process for determining whether a copy target is a color document or a black and white document, and determines it as a color document. If it is determined, the output process is performed in the full color mode, and if it is determined as a black and white document, the output process is performed in the black and white mode. Further, a document determined as a blank document is not subjected to subsequent processing and is not output.

  As illustrated in FIG. 1, the image forming apparatus 100 includes an image input device 101, an image processing device 102, an image output device 103, an image display device 104, a reception device 105, a transmission device 106, a storage device 107, and a control unit 108. Have.

The image input apparatus 101 is an image reading unit that reads a document and generates image data in the copier mode, the facsimile transmission mode, and the image transmission mode. More specifically, the image input device 101 includes a scanner unit including a CCD (Charge Coupled Device), and an electrical signal (analog image signal) obtained by color-separating light reflected from an original into RGB. And the electric signal is input to the image processing apparatus 102.

  Note that the image input apparatus 101 reads a document image in full color even when any of the above-described full color mode, single color mode, and two-color mode is selected. Further, the image input apparatus 101 reads a document image in full color even when the above-described automatic color discrimination process is performed in the image processing apparatus 102.

The image processing apparatus 102 is an integrated circuit that performs image processing on image data (image signal), and includes an ASIC (Application Specific Integrated Circuit). As shown in FIG. 1, the image processing apparatus 102 includes an A / D (analog / digital) conversion unit 2, a shading correction unit 3, an input processing unit 4, a document type automatic discrimination unit 5, a region separation processing unit 6, a compression unit. Unit 7, region separation signal compression unit 8, decoding unit 9, region separation signal decoding unit 10, image quality adjustment unit 11, colorization processing unit 12, color correction unit 13, black generation / under color removal unit 14, spatial filter unit 15, a scaling unit 16, an output tone correction unit 17, and a halftone generation unit 18. The processing content of each block included in the image processing apparatus 102 will be described in detail later.

  The image processing apparatus 102 performs image processing on the image data transmitted from the image input apparatus 101 in the copier mode, facsimile transmission mode, and image transmission mode, and the image data transmitted from the terminal apparatus in the print mode. In the facsimile reception mode, image processing is performed on image data received from an external device. The image processing apparatus 102 transmits image data subjected to image processing to the image output apparatus 103 in the copier mode, print mode, and facsimile reception mode, and transmits image data subjected to image processing in the facsimile transmission mode to the transmission apparatus. 106 is transmitted. Further, the image processing apparatus 102 transmits image data subjected to image processing to a mail processing unit (not shown) in the scan to e-mail mode of the image transmission mode, and performs image processing in the scan to ftp mode. The image data is transmitted to a predetermined folder, and the image data subjected to image processing is transmitted to a predetermined USB memory in the scan to usb mode.

  An image output device (printer) 103 prints (forms) an image of image data sent from the image processing device 102 on a recording medium (for example, paper). For example, an electrophotographic method or an inkjet method is used. The color printer used can be mentioned. Note that “printing” in the present embodiment means any one of printing in the print mode, printing in the copier mode, and printing in the facsimile reception mode.

  The image display device 104 is a liquid crystal display provided in an operation panel (not shown) of the image forming apparatus 100, and is a display unit capable of displaying a color image. The image display device 104 is covered with a touch panel, and has a function as an input interface of the image forming apparatus 100. That is, the image display device 104 displays a GUI (graphical user interface) and an operation guide for inputting various commands to the image forming apparatus 100.

  In the image forming apparatus 100 according to the present embodiment, a preview of an image to be printed can be displayed on the image display device 104 before printing in the copier mode or the facsimile reception mode. Furthermore, in the image forming apparatus 100 of the present embodiment, a preview of an image to be transmitted can be displayed on the image display device 104 before execution of transmission in the facsimile transmission mode or the image transmission mode.

  When the full color mode is selected in the copier mode or the image transmission mode, a full color image preview is displayed. When the single color mode is selected, a single color image preview is displayed, and the two color mode is selected. When selected, a preview of a two-color image is displayed.

  The image display device 104 is not limited to a liquid crystal display, and may be a display means other than the liquid crystal display (for example, an organic EL display, a plasma display, etc.).

  The receiving device 105 is connected to a telephone line or the Internet and receives image data from an external device by facsimile communication. The transmission device 106 is connected to a telephone line or the Internet, and is a device that transmits image data input by the image input device 101 to an external device by facsimile communication.

  The storage device 107 is a hard disk for temporarily storing image data handled by the image processing device 102.

The control unit 108 is a computer including a processor such as a CPU (Central Processing Unit) or a DSP (Digital Signal Processor), and comprehensively controls various hardware included in the image forming apparatus 100. In addition, the control unit 108 also has a function of controlling data transfer between each piece of hardware provided in the image forming apparatus 100.

  Next, details of processing executed in each block of the image processing apparatus 102 in each of the copier mode, the facsimile transmission mode, the facsimile reception mode, and the image transmission mode will be described in detail. In the image processing apparatus 102 according to the present embodiment, there is a block that operates when a certain mode a is selected but does not operate when a mode b different from the mode a is selected. (Mode a and mode b are any one of a copier mode, a facsimile transmission mode, a facsimile reception mode, and an image transmission mode). The image processing apparatus 102 also includes a block for changing the processing content according to the selected mode. Further, even if the selected mode is the same, the image processing apparatus 102 operates when processing image data for printing (for transmission) but does not operate when processing image data for preview. There are blocks that change processing contents between processing of image data for printing (for transmission) and processing of image data for preview. Therefore, in the following, the contents of processing executed in each block included in the image processing apparatus 102 will be described for each mode, and will be described separately for printing processing (or transmission processing) and preview display.

(1) Copier mode (1-1) During printing process (during image print job)
In the following, the image processing apparatus 102 will be described with reference to FIG. 1, but FIG. 1 illustrates a case in which printing processing in the full color mode or printing of an image determined to be a full color original in the automatic determination mode is performed in the copier mode. It will be described that the flow of the image data in the image processing apparatus 102 is shown.

  The A / D (analog / digital) converter 2 is a block that converts a color image signal (RGB analog signal) sent from the image input apparatus 101 into digital image data (RGB digital signal). The shading correction unit 3 is a block that performs processing for removing various distortions generated in the illumination system, the imaging system, and the imaging system of the image input device 101 on the image data sent from the A / D conversion unit 2. . The input processing unit 4 is a block that performs gradation conversion processing such as γ correction processing on each of the RGB image data sent from the shading correction unit 3.

The document type automatic discrimination unit 5 determines the type of the document read by the image input device 101 based on the RGB image data (RGB density signal) that has been subjected to processing such as γ correction by the input processing unit 4. Do. Here, as the type of document to be determined, there are a character document, a printed photograph document, a character printed photograph document in which characters and a printed photograph are mixed, and the like. The determination of the character document, the printed photo document, the character printed photo document, etc. is performed by the document type determination unit 52 of the document type automatic determination unit 5. As shown in FIG. 3, in addition to the document type determination unit 52, the document type automatic determination unit 5 determines whether the read document is a color document or a monochrome document based on the image data. A color / monochrome determination unit 51 that performs automatic color determination processing (ACS: Auto Color Selection), and a blank document determination unit 53 that determines whether the document is a blank document (whether it is a plain document). And. The RGB image data output from the automatic document type determination unit 5, the color / monochrome determination signal indicating the determination result by the color / monochrome determination unit 51, the original type determination signal indicating the determination result by the original type determination unit 52, and the blank original A blank document determination signal indicating a determination result by the determination unit 53 is input to the region separation processing unit 6 and the compression unit 7. In the present embodiment, the document type automatic determination unit 5 includes the three determination units described above. However, the document type automatic determination unit 5 does not necessarily include the three determination units, and may include at least one of these determination units. That's fine.

  Based on the RGB image data sent from the document type automatic discrimination unit 5, the region separation processing unit 6 discriminates for which pixel region the pixel is classified for each pixel of the input image. A process for generating a region separation signal indicating the discrimination result is performed. Here, the image regions discriminated by the region separation processing unit 6 include a black character region, a color character region, a halftone dot region, and the like. Note that the region separation processing may be in a form in which the image region is determined for each block including a plurality of pixels, instead of determining the image region for each pixel.

  The compression unit 7 is a block that performs processing for encoding the image data (RGB signals) sent from the document type automatic discrimination unit 5. Note that the encoding is performed based on, for example, a JPEG (Joint Photographic Experts Group) system.

The region separation signal compression unit 8 is a block that performs compression processing on the region separation signal generated for each pixel. Note that the compression processing in the region separation signal compression unit 8 is performed based on, for example, the MMR (Modified Modified Reed) method and the MR (Modified Reed) method, which are lossless compression methods.

  The control unit 108 includes the encoded code (encoded image data) output from the compression unit 7, the region separation signal code (compressed region separation signal) output from the region separation signal compression unit 8, and color / monochrome determination. The signal and the document type data generated based on the blank document determination signal are associated with each other and temporarily stored in the storage device 107 and managed as filing data. Here, the document type data in this embodiment is generated based on the color / monochrome determination signal and the blank document determination signal, but the document type data includes the color / monochrome determination signal, the blank document determination signal, and the document type determination signal. What is necessary is just to be produced | generated based on at least 1 type of signal. Then, when the copy output operation is instructed, the control unit 108 reads out the encoded code and the region separation signal code corresponding to the encoded code from the storage device 107, and performs the decoding unit 9 and the region separation signal decoding unit 10. To each. If the document type data represents a blank document, the above reading is not performed. That is, this document is not printed by the image output device 103.

  The control unit 108 associates the storage address or data name of the encoded code with the storage address of the region separation signal code and enters them in the management table. That is, the control unit 108 controls reading or writing of the encoded code and the region separation signal code using the management table.

  The decoding unit 9 expands the encoded code into RGB image data by performing a decoding process on the encoded code. The region separation signal decoding unit 10 performs a decoding process on the region separation signal code. The decoded region separation signal is delivered to the black generation / undercolor removal unit 14, the spatial filter unit 15, and the halftone generation unit 18. In the black generation / undercolor removal unit 14, the spatial filter unit 15, and the halftone generation unit 18, the image processing content is switched according to the type of the image area.

  The image quality adjustment unit 11 detects the background of the RGB image data sent from the decoding unit 9 and performs background removal correction. Furthermore, the image quality adjustment unit 11 adjusts the RGB balance (color adjustment, overall color adjustment such as reddish blue), brightness, and vividness based on setting information input from the operation panel (not shown) by the user. Do.

  Further, when the single color mode is selected, the image quality adjustment unit 11 performs processing to convert RGB image data into CMY image data that is a complementary color of RGB. Here, the conversion process from RGB image data to CMY image data in the single color mode is executed by using the following Equation 1. Note that the coefficients r1 to r3 in Equation 1 are determined based on [Table 1]. For example, when the user selects cyan as the desired color in the single color mode, the values of r1 to r3 belonging to the column “Cyan” in [Table 1] are referred to, and r1 = 1, r2 = 0, r3 = 0 is selected.

  Further, when the monochrome mode is selected or when it is determined that the document is a monochrome document in the automatic determination mode, the image quality adjustment unit 11 performs a process of converting RGB image data into K monochrome image data. Here, the conversion processing from RGB image data to K image data when it is determined as a monochrome document in the monochrome mode or the automatic discrimination mode is executed by using the following Expression 2.

FIG. 19 is a block diagram showing the same image forming apparatus 100 as the image forming apparatus 100 of FIG. 1, and performs printing processing when the monochrome mode is selected or when it is determined as a monochrome original in the automatic determination mode. It is the figure which showed the flow of the image data at the time.

That is, the output from the image quality adjustment unit 11 in the full color mode or when it is determined as a color document in the automatic determination mode is RGB image data as shown in FIG. 1, but in the single color mode. The output from the image quality adjustment unit 11 is CMY image data as shown in FIG. Note that the output from the image quality adjustment unit 11 when the two-color mode is selected is RGB image data as shown in FIG. Further, when the monochrome mode is selected, or when the monochrome document is determined in the automatic determination mode, the output from the image quality adjustment unit 11 is K image data as shown in FIG. . 2A shows a part of the block of the image processing apparatus 102 when the printing process in the single color mode is performed in the copier mode, and FIG. 2B shows the copier mode. FIG. 2C shows a part of the block of the image processing apparatus 102 when the printing process is performed in the two-color mode, and FIG. 2C is a monochrome document in the printing process in the monochrome mode or the automatic discrimination mode. 4 shows a part of blocks of the image processing apparatus 102 when the printing process of the image determined to be performed is performed.

  Further, the vividness adjustment executed by the image quality adjustment unit 11 can be realized by changing each value of r1 to r3 and a1 to a3 of the matrix of Expression 1 and using the matrix. Therefore, the matrix can be shared and the image processing circuit can be shared for the above vividness adjustment and the image data conversion process (conversion from RGB to CMY) in the single color mode. Therefore, in the present embodiment, the vividness adjustment and the image data conversion process in the single color mode are performed by the same processing unit (image quality adjustment unit 11).

  Similarly, conversion processing performed when the monochrome mode is selected or when the document is determined to be a monochrome document in the automatic determination mode is a1 = 0.299, a2 = 0.487, a3 = Since this is the same as when 0.114, c = 0, and r1 = r2 = r3 = 1, the image processing circuit can be shared. Therefore, in the present embodiment, the above-described vividness adjustment and single color mode and the image data conversion process when the monochrome mode is selected or when it is determined as a monochrome document in the automatic determination mode are the same process. (Image quality adjustment unit 11).

  When the two-color mode is selected, the two-color processing unit 12 converts the RGB image data output from the image quality adjustment unit 11 into CMY image data as illustrated in FIG. It is a block that performs. The conversion process from RGB image data to CMY image data in the two-color mode is performed by, for example, the method of [Example 1] or [Example 2] described in Japanese Patent Application Laid-Open No. 2007-28336. Can be realized.

  In addition, when the full color mode is selected, or when it is determined as a color document in the automatic determination mode, the two-color processing unit 12 applies the RGB image data output from the image quality adjustment unit 11 as shown in FIG. No processing is performed, and the image data is transferred to the color correction unit 13 as it is (through). Further, when the two-color processing unit 12 is in the single color mode or is determined to be a monochrome document in the automatic determination mode, the CMY image output from the image quality adjustment unit 11 as illustrated in FIG. No processing is performed on the data, and the image data is transferred to the color correction unit 13 as it is (through).

  The color correction unit 13 converts RGB image data output from the two-color processing unit 12 into CMY image data in the full-color mode or for a document determined to be a full-color document in the automatic determination mode. This block performs color correction processing and performs processing for improving color reproducibility on the image data. The color correction process described above is realized by creating an LUT (lookup table) in which input values (RGB) and output values (CMY) are associated with each other, and looking up the output values from the created LUT. .

Further, when the color correction unit 13 is determined to be a monochrome document in the single color mode, the two-color mode, or the black and white mode, or in the automatic determination mode, as shown in FIGS. In addition, no processing is performed on the CMY image data output from the two-color processing unit 12, and the image data is directly transferred to the black generation / undercolor removal unit 14 (through).

  In the full color mode or the two-color mode, or when it is determined that the document is a color document in the automatic determination mode, the black generation / under color removal unit 14 detects black (from the CMY image data output from the color correction unit 13). This block performs black generation for generating K) image data, and performs processing for generating new CMY image data by subtracting black (K) image data from original CMY image data. Thus, in the case of the full color mode or the two-color mode, or when it is determined as a color original in the automatic determination mode, the CMY image data is generated / undercolored as shown in FIGS. 1 and 2B. The removal unit 14 converts the image data into CMYK four-color image data.

  Further, when the black generation / undercolor removal unit 14 is in the single color mode or the monochrome mode, or is determined to be a monochrome document in the automatic determination mode, as shown in FIGS. No processing is performed on the CMY image data output from the correction unit 13, and the image data is directly passed to the subsequent spatial filter unit 15 (through).

  When the full-color mode or the two-color mode is selected, or for an original that has been determined to be a full-color original in the automatic determination mode, the output of the black generation / undercolor removal unit 14 and the black generation / lower Input / output of each block subsequent to the color removal unit 14 is CMYK image data as shown in FIG. However, when the single color mode is selected, the output of the black generation / under color removal unit 14 and the input / output of each block subsequent to the black generation / under color removal unit 14 are different from those in FIG. It becomes CMY image data. For a document that is determined to be a monochrome document in the monochrome mode or the automatic discrimination mode, the output of the black generation / under color removal unit 14 and the input of each block subsequent to the black generation / under color removal unit 14 Unlike FIG. 1, the output is K image data.

  The spatial filter unit 15 applies spatial filter processing (enhancement processing, smoothing) to the CMYK or CMY image data output from the black generation / undercolor removal unit 14 based on a region separation signal (region identification signal). Etc.). That is, the spatial filter unit 15 executes different image processing for each image region based on the region separation signal.

  The scaling unit 16 is a block that performs image enlargement or reduction processing based on a scaling command (information indicating the magnification of a print image) input by a user via an operation panel (not shown).

  The output tone correction unit 17 is a block that performs output γ correction processing for outputting the image data output from the scaling unit 16 to a recording medium such as paper. The halftone generation unit 18 performs tone reproduction processing (halftone generation processing) necessary for printing an image in the image output apparatus 103 using an error diffusion method or a dither method.

  The CMYK or CMY image data output from the halftone generation unit 18 is transferred to the image output device 103, and the image output device 103 prints an image of the image data on a recording medium (for example, paper).

The processing executed in each block of the image processing apparatus 102 at the time of copier mode and printing processing has been described above. However, at the time of printing processing after preview display or re-preview display, the A / D conversion unit 2 to area separation are performed. The signal compression unit 8 does not perform processing. That is, during the printing process after the preview display or the re-preview display, the image data recorded in the storage device 107 during the preview display or the re-preview display process, and the document to be described later, which is currently recorded in association with the image data Print processing is performed based on the type data. The processing performed by the decoding unit 9 to the halftone generation unit 18 during the printing process after the preview display or the re-preview display is performed when the printing process is performed without displaying the preview, respectively. This is the same as the processing performed by the generation unit 18.

(1-2) Preview Display Next, the contents of processing executed in each block of the image processing apparatus 102 when displaying a preview of an image to be printed in the copier mode are shown in FIGS. Will be described with reference to FIG.

  FIG. 4 is a block diagram illustrating the same image forming apparatus 100 as the image forming apparatus 100 of FIG. 1. In the copier mode, an image determined to be a full-color original in the preview display in the full-color mode or in the automatic determination mode. It is the figure which showed the flow of the image data at the time of performing the preview display.

  An A / D (analog / digital) conversion unit 2, a shading correction unit 3, an input processing unit 4, a document type automatic discrimination unit 5, a region separation processing unit 6, a compression unit 7, a region separation signal compression unit 8, and a decoding unit. 9. Since the processes of the image quality adjustment unit 11 and the colorization processing unit 12 are the same as in the printing process, the description thereof is omitted below.

  However, in the preview process when the monochrome mode is selected by the image quality adjustment unit 11 or when the document is determined to be a monochrome document in the automatic determination mode, the conversion process from RGB image data to K image data is performed by the following equation: 3 is used.

  In this case, unlike the printing process, as shown in FIG. 20, three pieces of K image data are transmitted from the image quality adjustment unit 11 to the image display device 104 in each pixel (all have the same value). . This is because the image display device 104 having the full color specification requires three values (image data) for one pixel.

  The control unit 108 includes the encoded code (encoded image data) output from the compression unit 7, the region separation signal code (compressed region separation signal) output from the region separation signal compression unit 8, and color / monochrome determination. The document type data generated based on the signal and the blank document determination signal and the increment value starting from 1 are stored in the storage device 107 in association with each other and managed as filing data. Here, the increment value is reset at the start of image reading, and is incremented each time the encoded code is recorded in the storage device 107. This is the original document read by the image input device 101. Is a value (hereinafter referred to as a document page).

Then, the control unit 108, for the image data representing the document corresponding to the document type designated at the time of the instruction of the preview display operation by the user, from the storage device 107 to the encoded code and the area corresponding to the encoded code The separated signal code is read and delivered to the decoding unit 9 and the region separated signal decoding unit 10, respectively. Further, when the designated document type is a blank document, the control unit 108 encodes not only the image data representing the document corresponding to the blank document but also the image data of the page adjacent to the page of the document. In addition to the image of the code and the blank document as shown in FIG. 10 (f), the encoded code and the region separation signal code are read out together with the image of the page adjacent to the page of the blank document. Alternatively, it may be delivered to the region separation signal decoding unit 10 respectively. Further, the control unit 108 may perform the above operation on an image representing a document corresponding to a predetermined document type instead of the document type designated by the user. The predetermined document type refers to the document type represented by the document type data having the smallest stored number of document type data stored in the storage device 107 (that is, for example, a document representing a color document type). In the case where eight type data and two original type data representing a monochrome original type are recorded, it may be a monochrome original) or a blank original.

  Further, the control unit 108 displays a value indicating the total number of documents for each document type to be preview displayed on the image display device 104. Note that the image processing apparatus 102 may supply the information indicating the total number of sheets only when the control unit 108 gives an instruction from the user, or may not have a function of displaying the total number of sheets.

  As illustrated in FIG. 4, the region separation signal decoding unit 10 passes the decoded region separation signal to the spatial filter unit 15 and the output tone correction unit 17 during preview display.

  The color correction unit 13 inputs RGB image data for a document that is determined to be a full-color document in the full-color mode or in the automatic determination mode. Note that RGB image data is data that conforms to the color space of the scanner (image input device 101). Then, the color correction unit 13 performs a process of converting the RGB image data into R′G′B ′ image data suitable for the color space of the image display device 104.

  That is, the color correction unit 13 performs processing for converting RGB image data suitable for the image reading characteristics of the scanner into R′G′B ′ image data suitable for the display characteristics of the display device. Note that the process of converting RGB image data to R′G′B ′ image data was also created by creating an LUT in which input values (RGB) and output values (R′G′B ′) were associated with each other. This is accomplished by looking up the output value from the LUT.

In this embodiment, conversion processing from RGB image data at the time of printing processing to CMYK image data, which is performed for image data determined to be a full-color original, and R from RGB image data at the time of preview display. The image processing circuit is shared for the conversion processing to the image data of “G′B”.

  Here, FIG. 4 shows the image forming apparatus 100 when previewing an image determined to be a full-color original in the automatic determination mode, and the color correction unit 13 inputs RGB image data. It is like that. However, in the single color mode or the two-color mode, as shown in FIGS. 5A and 5B, the color correction unit 13 inputs CMY image data. When the monochrome mode is selected or when it is determined that the document is a monochrome document in the automatic determination mode, as shown in FIG. 5C, the color correction unit 13 does not perform processing and outputs the input signal as it is. To do. FIG. 5A shows a part of the block of the image processing apparatus 102 when the preview display process in the single color mode is performed in the copier mode, and FIG. 5B shows the copier mode. FIG. 5C shows a part of the blocks of the image processing apparatus 102 when the preview display process is performed in the mode and the two-color mode, and FIG. 5C shows a monochrome original in the automatic discrimination mode in the copier mode. 2 shows a part of blocks of the image processing apparatus 102 when the determined image preview display process is performed.

Then, the color correction unit 13 is configured to display C in the single color mode or the two color mode.
A process of converting MY image data into R′G′B ′ image data is performed. That is, the color correction unit 13 performs processing for converting CMY image data suitable for the printing characteristics of the printing process into R′G′B ′ image data suitable for the display characteristics of the display device. The process of converting CMY image data into R'G'B 'image data is also created by creating an LUT that associates input values (CMY) with output values (R'G'B'). This is accomplished by looking up the output value from the LUT.

  As shown in FIGS. 4 and 5, the black generation / under color removal unit 14 is determined to be a full color document or a monochrome document in the single color mode, the two color mode, or the monochrome mode, or in the automatic determination mode. In any case, no processing is performed on the image data output from the color correction unit 13, and the image data is transferred to the subsequent spatial filter unit 15 as it is (through).

  The spatial filter unit 15 performs spatial filter processing (enhancement processing, smoothing processing, etc.) using a digital filter on the image data output from the black generation / undercolor removal unit 14 based on the region separation signal. That is, in the spatial filter unit 15, different image processing is performed for each image region based on the region separation signal as in the print processing.

  The scaling unit 16 performs a thinning process (a process for reducing the number of pixels) for converting the number of pixels of the image composed of the image data output from the spatial filter unit 15 into the number of pixels of the image display device 104. The image display device 104 provided in the operation panel of the image forming apparatus 100 has a lower resolution than the resolution of image data to be printed, and is usually an extremely small display. Therefore, it is necessary to thin out the image data during preview display. The magnification unit 16 enlarges an image based on a magnification command (information indicating display magnification, for example, a fixed magnification such as 2 to 4) input from an operation panel (not shown) provided in the image forming apparatus. And reduction processing is performed.

  The output tone correction unit 17 performs an output γ correction process on the image data output from the scaling unit 16 based on the region separation signal. More specifically, the output tone correction unit 17 selects a different gamma curve depending on the image region based on the region separation signal, and varies the content of the output γ correction processing for each image region. For example, a gamma curve corresponding to the display characteristics of the image display device 104 is selected for a region other than a character, and a gamma curve for displaying a character clearly is selected for a character region. Here, FIG. 6A is a gamma curve corresponding to the display characteristics of the image display device 104. A curve indicated by a solid line in FIG. 6B is a gamma curve for clearly displaying characters. The broken line in FIG. 6B is a gamma curve corresponding to the display characteristics of the image display device 104, and is shown for comparison with a gamma curve for clearly displaying characters.

  In the present embodiment, the output tone correction unit 17 selects the gamma curve based on the region separation signal, but only the gamma curve of FIG. 6A is selected without performing selection based on the region separation signal. It may be used to perform output gradation correction.

Further, when processing the image data recorded in association with the document type indicating the blank document in the storage device 107, the output tone correction unit 17 applies to the image data obtained by the output γ correction process. Further, the gamma correction processing (blank document additional gamma processing) represented by the gamma curve as shown in FIG. 13 may be performed. As shown by the gamma curve in FIG. 13, the image data obtained by the additional gamma processing for blank documents has a higher contrast in the highlight area than the image data before the processing, and a preview is displayed if the processing is not performed. Characters and designs that are sometimes difficult to see are emphasized and displayed in an easy-to-read manner. More specifically, for example, the document color is white (for example, the gradation value is R:
255, G: 255, B: 255), when a thin character or a picture (the gradation value is R: 240 or more, G: 240 or more, B: 240 or more) is included after the processing The gradation value of the character or the pattern portion of the image represented by the obtained image data is lower than that before the processing (for example, about R: 200, G: 200, B: 200). Therefore, the characters and pattern portions of the image represented by the processed image data are emphasized darker than the original color and displayed in an easy-to-view manner as compared with the case where no processing is performed. In the present embodiment, the output tone correction unit 17 performs the blank original gamma processing described above, but this processing does not necessarily have to be performed in the present invention.

  Then, the halftone generation unit 18 does not perform any processing on the image data output from the output tone correction unit 17, and transfers (through) the image data as it is to the subsequent image display device 104. Thereby, the image display device 104 can display a preview of the image to be copied based on the image data.

  Note that the output γ correction processing executed in the output tone correction unit 17 may be executed in the image quality adjustment unit 11.

  The processing executed in each block of the image processing apparatus 102 during the copier mode and preview display has been described above. In the re-preview display after the preview display, the A / D conversion unit 2 to the region separation signal compression unit 8 Do not process. That is, at the time of re-preview display, re-preview display is performed using the image data recorded in the storage device 107 in the processing at the time of the first preview display. Note that the processes performed by the decoding unit 9 to the halftone generation unit 18 during the re-preview display are the same as the processes performed by the decoding unit 9 to the halftone generation unit 18 during the initial preview display, respectively.

(1-3) Operation / non-operation of each block As described above, when printing is performed when the full color mode is selected and when it is determined to be a color document in the automatic document mode, the image quality adjustment unit 11 to halftone generation are performed. Of the unit 18, the two-color processing unit 12 does not operate, but all other blocks operate (see FIG. 1). On the other hand, at the time of preview display of the original image when the full color mode is selected and the original image determined to be a color original in the automatic original mode, the image quality adjustment unit 11 to the halftone generation unit 18 include 2 The color processing unit 12, the black generation / undercolor removal unit 14, and the halftone generation unit 18 do not operate, but all other blocks operate (see FIG. 3).

  Further, during printing in the two-color mode, the color correction unit 13 of the image quality adjustment unit 11 to the halftone generation unit 18 does not operate, but all other blocks operate (FIG. 2B). reference). On the other hand, of the image quality adjustment unit 11 to halftone generation unit 18, the black generation / undercolor removal unit 14 and the halftone generation unit 18 do not operate during the two-color mode preview display. All the blocks operate (see FIG. 4B).

  Further, during the printing in the single color mode, among the image quality adjustment unit 11 to the halftone generation unit 18, the two-color processing unit 12, the color correction unit 13, and the black generation / undercolor removal unit 14 do not operate. All other blocks operate (see FIG. 2A). On the other hand, during the preview display in the single color mode, among the image quality adjustment unit 11 to halftone generation unit 18, the two-color processing unit 12, the black generation / undercolor removal unit 14, and the halftone generation unit 18 operate. However, all other blocks operate (see FIG. 4A).

Further, when printing is performed when the monochrome mode is selected and when it is determined that the document is a monochrome document in the automatic document mode, the two-color processing unit 12 and the color correction unit 13 among the image quality adjustment unit 11 to the halftone generation unit 18 are printed. The black generation / undercolor removal unit 14 does not operate, but all other blocks operate (see FIG. 2C). Of the image quality adjustment unit 11 to halftone generation unit 18, the two-color processing unit 12, the color correction unit 13, and the like are displayed even when the monochrome mode is selected and the preview is displayed when the monochrome document is determined in the automatic document mode. The black generation / undercolor removal unit 14 and the halftone generation unit 18 do not operate, but all other blocks operate (see FIG. 5C).

(1-4) Processing Procedure Next, an example of the processing procedure when the copier mode and the automatic determination mode are selected will be described with reference to FIGS. FIG. 7 is a flowchart illustrating an example of a processing procedure of the image forming apparatus when the copier mode is selected.

  When copier mode and automatic discrimination mode are selected and the start key is pressed (YES in S1), image forming apparatus 100 scans the document (S2) and generates RGB analog signals. Before pressing the start key of S1, the user inputs setting information indicating whether preview display is necessary and an instruction for the document type to be displayed for preview display through the main display screen shown in FIG. By doing so, it is assumed that the presence or absence of preview display is set for the image forming apparatus 100.

  After S2, the image forming apparatus 100 converts RGB analog signals into RGB image data (digital data) (S3), performs shading correction on the image data (S4), and performs RGB after shading correction. Input γ correction processing is performed on the image data (S5).

  After S5, the image forming apparatus 100 performs document type determination and area separation processing based on the RGB image data (S6), and further stores the RGB image data and the area separation signal in the storage device 107 (S7). . Thereafter, the image forming apparatus 100 determines whether or not “Preview display is present” is set (S8). If “Preview display is present” is not set, the processing of S9 to S16 is executed. When “display present” is set, the processing of S17 to S26 is executed. Hereinafter, S9 to S16 will be described first, and then S17 to S26 will be described.

  If “Preview Display Available” is not set (NO in S8), the image forming apparatus 100 reads RGB image data from the storage device 107 and performs image quality adjustment processing such as background removal correction and vividness adjustment ( S9). Thereafter, the image forming apparatus 100 converts RGB image data corresponding to the characteristics of the scanner into CMY image data corresponding to the characteristics of the printer (S10), and further converts the CMY image data into CMYK image data. (S11). Thereafter, the image forming apparatus 100 performs a spatial filter process on the CMYK image data based on the result of the region separation process (S12), and performs a scaling process on the CMYK image data after the spatial filter process (S12). S13). After S13, the image forming apparatus 100 performs output γ correction processing and gradation reproduction processing on the CMYK image data (S14, S15), prints the image of the image data on paper (S16), and performs the processing. finish.

On the other hand, when it is determined in S8 that “Preview display is present” is set (YES in S8), image forming apparatus 100 is recorded in association with document type data indicating the document type for which preview display is instructed. RGB image data is read from the storage device 107, and the same image quality adjustment process as the image quality adjustment process of S9 is performed (S17). Thereafter, the image forming apparatus 100 converts RGB image data corresponding to the characteristics of the scanner into R′G′B ′ image data corresponding to the characteristics of the display device (S18). After S18, the image forming apparatus 100 performs a spatial filter process on the R′G′B ′ image data based on the result of the region separation process (S19), and the R′G′B ′ image data is displayed. The thinning process is performed on the image data of the R′G′B ′ so as to match the resolution and size of the image (S20). After S20, the image forming apparatus 100 performs output γ correction processing on the image data of R′G′B ′ based on the result of the region separation processing (S21). If the document type for which preview display is instructed is “blank”, the blank gamma additional gamma processing described above is performed after the output γ correction processing in S21. After S21, the image forming apparatus 100 performs a preview display based on the image data of R′G′B ′ (S22).

At this time, the control unit 108, as shown in FIG. 10 (b) ~ (f) , for each image 1401 preview display, based on the document type data and increment value stored in the storage device 107, A preview is displayed on the display screen 1400 of the image display device 104 so that the user can recognize the document type 1403 and the page number 1402 of the image.

  After S22, when an instruction to update the document type of the image displayed in the preview to another document type is received from the user (YES in S23), the image forming apparatus 100 performs the above-described operation specified by the user. Based on the other document type, the document type data of the image stored in the storage device 107 is updated based on the other document type. The image forming apparatus 100 reads the RGB image data, performs a re-preview display process according to the changed document type setting (S24), and returns to the process of S23.

  Note that the input of the command in S23 is performed through the determination result change screen shown in FIG. The determination result change screen is a screen that is displayed when selection of one of the images displayed in preview in FIGS. 10B to 10E is received from the user. As shown in FIG. 11, on the determination result change screen, the document type is displayed together with the selected image. In addition, buttons for changing the document type (“color determination”, “monochrome determination”, “blank document determination”) are displayed on the determination result change screen. When the user selects a “blank document determination” button, the image forming apparatus 100 updates the document type to “blank document”. Then, as shown in FIGS. 9A and 9B, the document type data of the t-th page recorded in the storage device 107 is updated from “color” to “blank” (the t-page has the document type changed). Updated image page).

  On the other hand, if an instruction to update the document type of the image being previewed to another document type is not issued (NO in S23) and a command indicating print permission is input from the user (YES in S24). The image forming apparatus 100 reads the RGB image data and the document type data stored in the storage device 107 again, and executes print processing based on these data. If a command indicating print permission is not input, the process proceeds to S25. In S25, when a command indicating print cancellation is input from the user (YES in S25), image forming apparatus 100 ends the process.

  Note that during the loop processing of S23 to S26, it is possible to accept from the user an instruction for preview display of a document type different from the document type displayed for preview. When receiving the instruction, the image forming apparatus 100 reads out RGB image data recorded in association with the document type data representing the specified document type from the storage device 107, and performs a re-preview display process corresponding to the document type. Do. The above instruction is made by pressing any one of the document types displayed on the display screen shown in FIG. Further, the display screen displayed for the user to perform the above instruction may be the display screen shown in FIG. The number displayed in parentheses for each document type is a value indicating the total number of documents for each document type to be previewed.

(2) Facsimile transmission mode (2-1) During transmission processing (for image transmission job)
FIG. 14 is a block diagram showing the same image forming apparatus 100 as the image forming apparatus 100 of FIG. 1, and is a diagram showing the flow of image data when performing transmission processing in the facsimile transmission mode. An A / D (analog / digital) conversion unit 2, a shading correction unit 3, an input processing unit 4, a document type automatic discrimination unit 5, a region separation processing unit 6, a compression unit 7, a region separation signal compression unit 8, and a decoding unit. Since the process of 9 is the same as in the case of the copier mode, the description thereof is omitted below.

  In the facsimile transmission mode, the region separation signal decoding unit 10 reads and decodes the region separation signal code from the storage device 107 and transmits the decoded region separation signal to the spatial filter unit 15.

  The image quality adjustment unit 11 converts the RGB image data output from the decoding unit 9 into K image data (a value indicating gray shades). This conversion is performed by using a predetermined matrix coefficient or the above-described equation 2.

  The two-color processing unit 12, the color correction unit 13, and the black generation / undercolor removal unit 14 do not perform any processing on the K image data (signal) output from the image quality adjustment unit 11, and this K The image data is transferred to the subsequent spatial filter unit 15 as it is (through).

  The spatial filter unit 15 performs spatial filter processing (enhancement processing, smoothing processing, etc.) on the K image data based on the region separation signal using a digital filter. The scaling unit 16 performs scaling processing on the K image data according to the transmission resolution. The output tone correction unit 17 performs output γ correction processing (γ correction for outputting to a recording medium such as paper) on the K image data output from the scaling unit 16. The halftone generator 18 converts the K image data into binarized image data by, for example, an error diffusion method. The binarized image data is rotated as necessary by a rotation processing unit (not shown), compressed in a predetermined format by a compression / decompression processing unit (not shown), and stored in a memory (not shown). .

  After that, when the transmitting apparatus (for example, modem) 106 performs a transmission procedure with the other party and secures a transmittable state, the binary image data stored in the memory is compressed in a predetermined format. Necessary processing such as reading and compression format change is performed, and the binary image data is sequentially transmitted to the other party via a communication line.

(2-2) Preview Display FIG. 15 is a block diagram showing the same image forming apparatus 100 as the image forming apparatus 100 of FIG. 1, and shows the flow of image data when preview display processing is performed in the facsimile transmission mode. It is a figure. Note that preview display in the facsimile transmission mode means processing for performing preview display of an image to be transmitted by facsimile before facsimile transmission.

  At the time of preview display, the A / D conversion unit 2, the shading correction unit 3, the input processing unit 4, the document type automatic discrimination unit 5, the region separation processing unit 6, the compression unit 7, the region separation signal compression unit 8, the decoding unit 9, Since the processing of the region separation signal decoding unit 10, the image quality adjustment unit 11, and the spatial filter unit 15 is the same as that in the facsimile transmission processing, the description thereof is omitted. However, Formula 3 is used as the conversion formula in the image quality adjustment unit 11. Further, the processes in the two-color processing unit 12, the color correction unit 13, and the black generation / undercolor removal unit 14 are passed through in the same manner as in the facsimile transmission process.

  However, at the time of preview display, unlike the transmission processing, as shown in FIG. 15, three pieces of K image data are transmitted from the image quality adjustment unit 11 to the image display device 104 in each pixel ( All are the same value). This is because the image display device 104 having the full color specification requires three values (image data) for one pixel.

  The scaling unit 16 thins out the K image data so that the number of pixels of the image composed of the K image data output from the spatial filter unit 15 matches the number of pixels of the display size of the image display device 104. I do. The magnification unit 16 enlarges an image based on a magnification command (information indicating display magnification, for example, a fixed magnification such as 2 to 4) input from an operation panel (not shown) provided in the image forming apparatus. And reduction processing is performed.

  The output tone correction unit 17 performs γ correction corresponding to the display characteristics of the image display device 104 on the K image data output from the scaling unit 16. Then, the halftone generation unit 18 does not perform any processing on the K image data output from the output tone correction unit 17, and transfers the K image data to the subsequent image display device 104 (through). To do). As a result, the image display device 104 can display a preview of the image to be faxed based on the K image data. Note that the output tone correction unit 17 may perform additional gamma processing for a blank document after performing γ correction in the same manner as in the copier mode.

  In the preview display process in the facsimile transmission mode, the image quality adjustment unit 11 converts RGB image data into three K image data. However, the present invention is not limited to such a form. For example, up to the output gradation correction unit 17, image processing is performed without converting RGB image data into K image data, and the output gradation correction unit 17 The output RGB image data may be converted into K image data by a browser.

(2-3) Operation / non-operation of each block As described above, during the transmission processing in the facsimile transmission mode, the two-color processing unit 12 and the color correction unit among the image quality adjustment unit 11 to the halftone generation unit 18. 13. The black generation / undercolor removal unit 14 does not operate, but all other blocks operate (see FIG. 7). On the other hand, at the time of preview display in the facsimile transmission mode, among the image quality adjustment unit 11 to halftone generation unit 18, the two-color processing unit 12, the color correction unit 13, the black generation / undercolor removal unit 14, and the halftone generation. The unit 18 does not operate, but all other blocks operate (see FIG. 8).

(2-4) Processing Procedure Next, an example of a processing procedure in the facsimile transmission mode will be described. When a fax transmission command is input by the user when “Preview Display Available” is not set in the image forming apparatus 100, the image data is processed as shown in FIG. Will be sent to. As described above, the image data of the document determined to be a blank document is not transmitted to the external device.

  On the other hand, when a fax transmission command is input by the user when “preview display is present” is set in the image forming apparatus 100, the image data is processed as shown in FIG. The image data is stored in the storage device 107, and a preview of the image selected based on the document type designated by the user or the predetermined document type among the image data is displayed as an image. Displayed on the device 104. Then, when a command indicating transmission permission is input from the user while the preview is displayed, the image data in the storage device 107 is read, and the read image data is decoded as shown in FIG. The data is processed by the unit 9 to the halftone generation unit 18 and transmitted to the external device by the transmission device 106.

(3) Facsimile reception mode (3-1) During print processing (for image print jobs)
FIG. 16 is a block diagram showing the same image forming apparatus 100 as the image forming apparatus 100 of FIG. 1, and shows the flow of image data when performing printing processing in the facsimile reception mode.

When receiving a facsimile, the receiving apparatus 105 receives K image data (1 bit) transmitted from the other party while performing a communication procedure. The K image data received by the receiving apparatus 105 is subjected to decompression processing by a compression / expansion processing unit (not shown), and rotation processing is performed as necessary by a rotation processing unit (not shown). A resolution conversion unit (not shown) performs resolution conversion processing as necessary. Thereafter, the image data is temporarily stored in the storage device 107.

  Further, the image data written in the storage device 107 is delivered to the decoding unit 9 of the image processing apparatus 102 by the control unit 108. Decoding unit 9, image quality adjustment unit 11, colorization processing unit 12, color correction unit 13, black generation / under color removal unit 14, spatial filter unit 15, scaling unit 16, output tone correction unit 17, and halftone generation The unit 18 does not perform any processing on the image data sent from the storage device 107, and delivers (through) the image data as it is to the subsequent image output device 103. The image output device 103 forms an image on a recording medium (for example, paper) based on the K image data sent from the halftone generation unit 18. Note that when the printing process is performed in the facsimile reception mode, the image processing is not performed as described above. Therefore, the image data stored in the storage device 107 may be directly output to the image output device 103.

(3-2) Preview Display FIG. 17 is a block diagram showing the same image forming apparatus 100 as the image forming apparatus 100 of FIG. 1, and shows the flow of image data when preview display processing is performed in the facsimile reception mode. It is a figure. Note that the preview display in the facsimile reception mode means a process for previewing an image to be printed before printing the image of the image data when the image data is received by the facsimile.

  Even during the preview display in the facsimile reception mode, the image data written in the storage device 107 is delivered to the decoding unit 9 of the image processing apparatus 102 by the control unit 108 as in the printing process in the facsimile reception mode. The decoding unit 9 does not perform any processing on the image data sent from the storage device 107 and delivers (through) the image data to a bit number conversion processing unit (not shown). Then, the bit number conversion processing unit converts the bit number of the image data received from the decoding unit 9 (for example, conversion from 1 bit to 8 bits), and delivers the bit number converted image data to the subsequent image quality adjustment unit 11. . That is, although not shown, a bit number conversion processing unit is provided between the decoding unit 9 and the image quality adjusting unit 11 in FIG.

  As shown in FIG. 17, when the image quality adjustment unit 11 inputs one piece of K image data for each pixel, the image quality adjustment unit 11 generates and outputs three pieces of the K image data (all have the same value). This is because the image display device 104 having a full color specification requires three values for one pixel.

  Thereafter, the two-color processing unit 12, the color correction unit 13, and the black generation / under color removal unit 14 do not perform any processing on the K image data sent from the image quality adjustment unit 11, and the image data As it is to the subsequent spatial filter unit 15 (through). The spatial filter unit 15 performs a blurring process or the like on the K image data using a digital filter.

The scaling unit 16 thins out the K image data so that the number of pixels of the image composed of the K image data output from the spatial filter unit 15 matches the number of pixels of the display size of the image display device 104. I do. Further, in the scaling unit 16, based on a scaling command (information indicating display magnification, for example, a fixed magnification such as 2 to 4) input from an operation panel (not shown) provided in the image forming apparatus 100. Enlargement or reduction processing is performed.

  The output tone correction unit 17 performs output γ correction processing corresponding to the display characteristics of the image display device 104 on the K image data output from the scaling unit 16. Then, the halftone generation unit 18 does not perform any processing on the K image data output from the output tone correction unit 17 and transfers (through) the image data as it is to the subsequent image display device 104. . As a result, the image display device 104 can display a preview of the image received by fax based on the K image data.

(3-3) Operation / non-operation of each block As described above, the image quality adjustment unit 11 to the halftone generation unit 18 do not operate during the printing process in the facsimile reception mode (see FIG. 16). On the other hand, at the time of preview display in the facsimile reception mode, among the image quality adjustment unit 11 to halftone generation unit 18, the two-color processing unit 12, the color correction unit 13, the black generation / undercolor removal unit 14, and the halftone generation The unit 18 does not operate, but all other blocks operate (see FIG. 17).

(3-4) Processing Procedure Next, an example of a processing procedure in the facsimile reception mode will be described. When image data is received by facsimile in the image forming apparatus 100, the received image data is temporarily written in the storage device 107. Here, there is a time lag from when the image data is written in the storage device 107 to when the image is printed. When a “preview command” is input by the user during this time lag, the image data is not shown in FIG. 10, the image preview of the image data is displayed on the image display device 104. Further, when printing an image, it is processed according to the flow shown in FIG. 16, and the image of the image data is printed by the image output device 103.

(4) Image transmission mode (4-1) During transmission processing (during image transmission job)
When the image forming apparatus 100 is operated during the transmission processing in the image transmission mode, the image input apparatus 101, the A / D (analog / digital) conversion unit 2, the shading correction unit 3, the input processing unit 4, and the document type automatic discrimination unit 5 are used. The processing contents of the region separation processing unit 6, the compression unit 7, the region separation signal compression unit 8, and the decoding unit 9 are the same as those in the copier mode. Note that the region separation signal decoding unit 10 supplies region separation signals to the spatial filter unit 15 and the output tone correction unit 17.

  Then, the image quality adjustment unit 11 performs undercolor removal and color balance adjustment, and the color correction unit 13 performs R "G" B "image data (for example, suitable for display characteristics of display devices that are widely used) (for example, sRGB data), and spatial filter processing (enhancement processing, smoothing processing) using a digital filter is performed in the spatial filter unit 15 based on the region separation signal. In the output tone correction unit 17, for example, correction using the gamma curve of FIG. 6B is performed on the character region, and FIG. The correction using the gamma curve of a) is performed, and the two-color processing unit 12 and the black generation / under color removal unit 14 do not perform processing on the input image data, and this image data is used as it is. Through to the next block That. Therefore, the output from the output tone correction section 17 is image data of the R "G" B ".

Further, the R "G" B "image data output from the output tone correction unit 17 is converted into an image file such as a PDF file by a format conversion processing unit (not shown), and scan to image transmission mode. In the e-mail mode, the image file is attached to an e-mail by a mail processing unit (job device) (not shown), and the e-mail is transmitted to the other party via the network. In the scan to ftp mode, the image file is transmitted to a predetermined folder, and in the scan to usb mode of the image transmission mode, the image file is transmitted to a predetermined USB memory.

(4-2) Preview Display When the image forming apparatus 100 is operated during preview display in the image transmission mode, the image input device 101, the A / D (analog / digital) conversion unit 2, the shading correction unit 3, and the input processing unit. 4. Document type automatic discrimination unit 5, region separation processing unit 6, compression unit 7, region separation signal compression unit 8, decoding unit 9, region separation signal decoding unit 10, image quality adjustment unit 11, and colorization processing unit 12 The contents are the same as when transmitting in the image transmission mode.

  Then, at the time of preview display in the image transmission mode, the color correction unit 13 performs processing for converting the RGB image data into R′G′B ′ image data that matches the color space of the image display device 104.

  After that, as in the transmission, spatial filter processing (enhancement processing, smoothing processing) by a digital filter is performed in the spatial filter unit 15 based on the region separation signal. The scaling unit 16 performs a thinning process so as to match the size of the image display device 104. Further, in the output tone correction unit 17, for example, correction using the gamma curve of FIG. 6B is performed on the character region, and the gamma curve of FIG. Correction using is performed. Note that the output tone correction unit 17 may perform blank gamma additional gamma processing after performing the above correction in the same manner as in the copier mode.

  Then, the R′G′B ′ image data output from the output tone correction unit 17 is supplied to the image display device 104, and the image display device 104 performs a preview display based on the R′G′B ′ image data. Do.

  Note that the document type automatic determination unit 5 determines not only whether a document image is a color document or a monochrome document, but also a monochrome document during transmission processing in the image transmission mode and during preview display. For a thing, a process for determining whether it is a binary image (an image composed of binary values of white and black) or a gray scale image (an image having gradation) may be performed. This determination processing method will be briefly described below. First, the document type automatic determination unit 5 creates a frequency distribution of pixel values for all pixels determined to be monochrome pixels (monochrome pixels) for an image determined to be a monochrome document. Then, the document type automatic discrimination unit 5 determines that the frequency distribution is mainly composed of two peaks, ie, a white peak and a black peak, and determines that the image is a binary image. It is determined as an image (image having gradation).

  Further, when the document type automatic determination unit 5 determines that the document image is a grayscale image, the image forming apparatus 100 identifies identification information (for example, “grayscale” characters) for allowing the user to recognize that the document image is a grayscale image. ) May be displayed on the image display device 104. Thereby, the user can recognize that the document to be transmitted is a gray scale image. Note that identification information for allowing the user to recognize that the image is a grayscale image is displayed together with the preview image so as not to overlap the preview image.

(5) Modification In the image forming apparatus 100 shown in FIG. 1, the compressed image data (encoded code), the area separation signal code, and the document type are stored in the storage device 107 in association with each other. However, like the image forming apparatus 100a shown in FIG. 18, after the image data is read by the image input apparatus 101, the read image data is encoded and temporarily stored before the region separation process and the document type determination process. The document type determination process and the area separation process may be performed on the image data stored in the apparatus 107 and read from the storage apparatus 107 and decoded. In this case, the document type automatic determination unit 5 determines “full color”, “black and white”, and “blank” for each image data representing the document for all the documents read by the image input apparatus 1. Then, the document type automatic determination unit 5 records the determination result of the document type of each document in the storage device 107 so as to correspond to the image data of the document already recorded in the storage device 107.

  The image forming apparatus 100 shown in FIG. 1 can execute an image filing mode (image filing job) while a job such as a copier mode, a print mode, a facsimile transmission mode, a facsimile reception mode, and an image transmission mode is selected. Good. In this image filing mode, an image file (JPEG, TIFF file, etc.) is created based on image data obtained by the image input apparatus 101 or image data received from outside during job selection such as copier mode. In this mode, the image file is stored in the storage device 107.

  Here, at the time of filing in the image filing mode, image data obtained by the image input device 101 or image data received from the outside is converted into an image file (JPEG, TIFF file, etc.) by the image processing device 102, and thereafter The image file is stored in the storage device 107 by a filing processing unit (job device) (not shown).

  Also, when previewing while selecting each job (copier mode, print mode, facsimile transmission mode, etc.), the image data obtained by the image input device 101 or from the outside regardless of whether the image filing mode is executed or not. The received image data is processed by the image processing apparatus 102 and then sent to the image display apparatus 104. Further, when previewing during the selection of each job, the image processing executed by the image processing apparatus 102 is the same regardless of whether or not the image filing mode is executed. For example, when the copier mode preview is displayed, the processing content of the image processing apparatus 102 is as shown in FIG. 4 regardless of whether or not the image filing mode is executed. In addition, when the preview is displayed in the facsimile transmission mode, the processing contents of the image processing apparatus 102 are as shown in FIG. 15 regardless of whether or not the image filing mode is executed.

(6) Advantages of the image processing apparatus according to the present embodiment The image processing apparatus 102 according to the present embodiment is configured so that the color / monochrome determination unit 51 determines whether the image data transmitted from the image input apparatus 101 is a color image or a monochrome image. Is output, and a blank document determination signal indicating whether or not the blank document determination unit 53 is a blank document is output. Based on the output color / monochrome determination signal and blank document determination signal, control unit 108 records document type data representing the document type and image data in association with image data 107. Then, the control unit 108 displays an image represented by the image data on the image display device 104 only for the image data recorded in association with the document type designated by the user or the document type data representing a predetermined document type. Display a preview.

  As a result, the image processing apparatus 102 according to the present embodiment can allow the user to easily check the preview display image of the document corresponding to the specific document type even if the number of documents scanned is large. There is an effect.

(Program, recording medium)
In this embodiment, a blank document (blank sheet) is recorded on a computer-readable recording medium in which program codes (execution format program, intermediate code program, source program) to be executed by a computer are recorded without re-reading the document. It is also possible to record an image processing method for performing preview display by skipping (original). As a result, it is possible to provide a portable recording medium on which a program for performing the image processing method is recorded.

  In the present embodiment, as the recording medium, a memory (not shown) such as a ROM itself may be a program medium because processing is performed by a microcomputer. However, it may be a program medium provided with a program reading device as an external storage device and readable by inserting a recording medium therein.

  In any case, the stored program code may be configured to be accessed and executed by the microprocessor, or in any case, the program code is read and the read program code is the microcomputer. The program code may be downloaded to a program storage area (not shown) and executed. It is assumed that this download program is stored in the main device in advance.

Here, the program medium is a recording medium configured to be separable from the main body, such as a tape system such as a magnetic tape or a cassette tape, a magnetic disk such as a flexible disk or a hard disk, a CD-ROM / MO / MD / DVD, or the like. Semiconductors such as optical discs, IC cards (including memory cards) / optical cards, etc., or mask ROM, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), flash ROM, etc. It may be a medium that carries a fixed program code including a memory.

  In the present embodiment, since the system configuration is such that a communication network including the Internet can be connected, a medium that dynamically carries the program code so as to download the program code from the communication network may be used. When the program code is downloaded from the communication network in this way, the download program may be stored in the main device in advance, or may be installed from another recording medium. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission. The recording medium is read by a program reading device provided in a digital color image forming apparatus or a computer system, whereby the above-described image processing method is executed.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and the embodiments can be obtained by appropriately combining the respective technical means disclosed in the above-described embodiments. The form is also included in the technical scope of the present invention.

  The image processing apparatus of the present invention can be used for an apparatus that handles image data, but is particularly suitable for a multifunction machine, a copying machine, a printer, and a facsimile machine.

5 Document type automatic determination unit (document type determination means)
11 Image quality adjustment unit (output control means)
12 Two-color processing unit (output control means)
13 color correction unit (output control means)
14 Black generation / under color removal unit (output control means)
15 Spatial filter section (output control means)
16 Scaling unit (output control means)
17 Output tone correction unit (output control means)
18 Halftone generator (output control means)
51 Color / monochrome determination unit (color / monochrome determination means)
53 Blank document determination unit (blank document determination means)
DESCRIPTION OF SYMBOLS 100 Image forming apparatus 101 Image input apparatus (image reading apparatus)
102 image processing apparatus 103 image output apparatus (job apparatus)
104 Image display device (output device)
105 receiving device 106 transmitting device (job device)
107 Storage Device 108 Control Unit (Output Control Unit, Document Type Accepting Unit)

Claims (12)

From the input image data obtained by reading the image of the document with the image reading device, output image data handled by any one of the image print job, the image transmission job, and the image filing job is generated, and the job An image processing apparatus comprising output control means for outputting to a job apparatus for executing
For each of a plurality of originals read by the image reading device, it is determined based on the input image data representing the original that the original type of the original corresponds to a predetermined original type. Document type determination means for determining
The output control means, for the original from which the image has been read, displays only the original corresponding to one of the plurality of original types obtained as a result of the determination by the original type determining means on the image display device. Generate image data for display for preview display, output to the image display device ,
The document type determination means includes blank document determination means for determining whether or not the document is a blank document based on the input image data.
The output control means generates the display image data only for the original and outputs it to the image display device when the original is determined to be the blank original by the blank original determination means. Instead, the original and at least one of the originals read before and after the original are extracted from the plurality of originals, and the display image data is generated for each of the extracted originals. An image processing apparatus that outputs to the image display apparatus. From the input image data obtained by reading the image of the document with the image reading device, output image data handled by any one of the image print job, the image transmission job, and the image filing job is generated, and the job An image processing apparatus comprising output control means for outputting to a job apparatus for executing
For each of a plurality of originals read by the image reading device, it is determined based on the input image data representing the original that the original type of the original corresponds to a predetermined original type. Document type determination means for determining
The output control means, for the original from which the image has been read, displays only the original corresponding to one of the plurality of original types obtained as a result of the determination by the original type determining means on the image display device. Generate image data for display for preview display, output to the image display device,
  The document type determination means includes blank document determination means for determining whether or not the document is a blank document based on the input image data.
  When the document whose preview is displayed on the image display device is a document determined to be a blank document by the blank document determination unit, the output control unit is configured to display the first display image data as the display image data. For the image data, the gradation difference between the gradation value representing the original color of the blank document is not more than a predetermined threshold value, and the gradation value different from the gradation value is converted so that the gradation difference becomes larger. And outputting the second display image data obtained in this way to the image display device. For each of a plurality of document types obtained as a result of the determination, the output control means displays the document type on the image display device, and among the documents from which the image has been read, the number of documents corresponding to the document type the image processing apparatus according to claim 1 or 2, characterized in that displayed on the image display device. The document type determination means is a color document or a monochrome document based on color image data which is input image data obtained by reading the image of the document as color by the image reading device. The image processing apparatus according to any one of claims 1 to 3, further comprising a color / monochrome determination unit that determines whether or not. The output control means, either or document to generate image data for the display is read many sheet by the image reading apparatus of claims 1, characterized in that displayed on the image display device 4 of 1 The image processing apparatus according to item. Document type accepting means for accepting a document type setting for generating output image data according to the setting from a user, wherein the image display device has a document type different from the document type of the document whose image is previewed. the image processing apparatus according to any one of claims 1 5, characterized in that it further includes a document type accepting means can accept from the user the settings. The image processing apparatus according to any one of claims 1 to 6, and the image reading apparatus is characterized in that it comprises an image reading apparatus. And an image processing apparatus and job device according to any one of claims 1 to 6, the image forming apparatus, wherein said job device is a printing device. A program for operating the image processing apparatus according to any one of claims 1 to 6 , wherein the image processing program causes a computer to function as each of the means. A computer-readable recording medium on which the image processing program according to claim 9 is recorded. From the input image data obtained by reading the image of the document with the image reading device, output image data handled by any one of the image print job, the image transmission job, and the image filing job is generated, and the job An image processing apparatus comprising output control means for outputting to a job apparatus for executing
A blank document determination means for determining whether a document read by the image reading device is a blank document based on the input image data;
The output control means, when the original from which the image has been read is determined to be the blank original by the blank original determination means, at least of the original and the original read before and after the original One of them is extracted from a plurality of documents read by the image reading device, and for each extracted document, display image data for displaying a preview of the image on the image display device is generated, and the image display An image processing apparatus that outputs to an apparatus. From the input image data obtained by reading the image of the document with the image reading device, output image data handled by any one of the image print job, the image transmission job, and the image filing job is generated, and the job An image processing apparatus comprising output control means for outputting to a job apparatus for executing
A blank document determination means for determining whether a document read by the image reading device is a blank document based on the input image data;
The output control means displays a preview of the image on the image display device when the document on which the image display is previewed on the image display device is an original document determined to be a blank document by the blank document determination means. For the first display image data that is the display image data generated in the above, the gradation difference from the gradation value representing the original color of the blank document is equal to or less than a predetermined threshold value, and a gradation different from the gradation value A second display image data obtained by converting a value so that the gradation difference becomes larger, and outputting the second display image data to the image display device.

Images