JP2010130277A - Image processing apparatus and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image processing apparatus and an image forming apparatus, which can correct the inclination of a manuscript image on each page even if reading a double-page spread. <P>SOLUTION: An image processing apparatus includes: an image data storing unit 102 for storing image data; an edge detection unit 104 for detecting edges of a manuscript and a back margin of each page from the stored image data; a page data storing unit 105 which divides a manuscript image on a page-by-page basis and stores image data of each page based on the detected back margin of each page; an inclination detection unit 106 for detecting an amount of inclination in the main-scanning direction of each divided image data of the manuscript image; an inclination correction unit 107 for correcting each divided image data for inclination based on the detected amount of inclination; and a manuscript integration unit 108 for integrating the corrected image data of each page into one page. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image processing apparatus and an image forming apparatus that process image data read by an image reading apparatus such as a scanner, and more particularly to an image processing apparatus and an image forming apparatus that can correct the inclination of a read image. is there.

When reading an original using an image reading device such as a scanner, the original may be displaced from the reference position on the reading surface due to a slight setting error or static electricity from the user. The original image is tilted, and the printed image is difficult to see.
In view of such inconvenience, for example, Patent Document 1 discloses a technique for correcting the inclination of an inclined original image when the original is read in an inclined state.

Japanese Patent Application Laid-Open No. 2005-133867 detects an amount of deviation for each pixel in a scanning line direction for each scanning line from image data of a read original, and moves the position of the pixel with deviation to the original position for each scanning line. This technique corrects the inclination of the image.
JP 2006-94099 A

However, in the technique of Patent Document 1, correction can be made when the inclination of the original image occurs in one direction (right inclination or left inclination) as in the case of reading one original. If there are multiple pages (2 pages) on the same reading surface as in a double-page spread and the image inclination of each page is different, it is necessary to correct each page in a different direction. There was a problem that the processing was extremely complicated.
An object of the present invention is to provide an image processing apparatus and an image forming apparatus capable of individually correcting the inclination of an image of each page even when a plurality of pages exist on the same reading surface as in a spread document. .

  That is, the image processing apparatus of the present invention is an image processing apparatus that reads a plurality of pages of a document and processes the obtained image data. The image data storage unit that stores the image data and the stored image data An edge detection unit that detects an edge of a document and a throat portion of each page, a page data storage unit that divides a document image into pages based on the detected throat portion, and stores the image data An inclination detection unit that detects an inclination amount of each original image with respect to the main scanning direction, an inclination correction unit that corrects an inclination of the image data of each divided original image based on the detected inclination amount, and each corrected page And a document integration unit that integrates the image data into one page.

  Furthermore, an image forming apparatus of the present invention includes an image reading device that reads a document and generates image data, the image processing device having the above-described configuration, and a printer that prints the image data integrated by the document integration unit. It is characterized by.

  Another image processing apparatus of the present invention is an image processing apparatus that reads a spread original and processes the obtained image data. The image data storage unit that stores the image data and the stored image data A long and short side detecting unit for detecting a long side and a short side of one side of an original; a printing region copying unit for setting a single side printing area based on the detected long and short sides and storing image data on one side in the printing area; , An inclination detection unit that detects an inclination amount of the original image in the main scanning direction in the print area, an inclination correction unit that corrects an inclination of image data in the print area based on the detected inclination amount, and the corrected print And a document forming unit that edits image data of the region into one page.

  Furthermore, another image forming apparatus of the present invention includes an image reading apparatus that reads an original and generates image data, an image processing apparatus having the above-described configuration, and a printer that prints image data edited by the original forming unit. It is characterized by providing.

  According to the present invention, the image data of the read original is divided into left and right from the “throat” portion, the inclination of each divided image data is corrected, and each corrected image data is integrated into one page. Thus, for example, even when a two-page spread original is read, the image data of the original image with no inclination can be obtained on both the left and right pages, and by printing this corrected image data, A print image easy for the user to view can be obtained.

  According to another invention, the printing area is set by detecting the long and short sides of one side of the original from the image data of the read facing original, and the single-sided image data is stored, and the inclination is determined from the image data of the printing area. Since it is configured to detect and correct the inclination of the image data and edit the corrected single-sided image data into one page, when reading and printing only one side of a two-page spread document, Even if the document is inclined or a part of the image on the other side is read, it is possible to print the image on the document surface desired by the user in an easy-to-see manner.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 2 is a diagram showing an overview of the image forming apparatus 200 (copier 200) according to the present invention.
As shown in FIG. 2, the copier 200 includes a scanner 201, an image processing apparatus 100 according to the present invention, a printer 202, and an operation panel 206 as a user interface.

The scanner 201 includes a mounting table cover 205, a mounting table 203, an image sensor 204, a light source (not shown), and the like. The scanner 201 irradiates a document set on the mounting table 203 with light from the light source, and the reflected light is reflected by the image sensor 204. Image data is generated by receiving light.
The mounting table cover 205 fixes the document set on the mounting table 203 and prevents the image sensor 204 from receiving disturbance light (light from the outside other than reflected light from the document).

  The image processing apparatus 100 inputs image data generated by the scanner 201 to perform image processing, and outputs the processed image data to the printer 202.

  For example, an electrophotographic printer is used as the printer 202, and an image is formed by forming a toner image corresponding to image data input from the image processing apparatus and fixing the toner image on a paper surface.

  The operation panel 206 includes a numeric keypad 208, a reading start button 207, an inclination correction designation interface 400 (1200) composed of a liquid crystal display, a touch panel, and the like, and an original reading instruction and various parameter settings by user button operations. And display.

The image processing apparatus 100 includes a CPU (not shown) and a RAM and a ROM (not shown) connected to the CPU.
The RAM is a volatile memory, and temporarily stores image data acquired from the scanner 201, image data necessary for image processing control, and the like. The ROM is a read-only memory, and stores various control programs for image tilt correction, which will be described later.
The CPU executes an image processing operation by the image processing apparatus 100 by developing a control program stored in the ROM on the RAM and executing the control program.

FIG. 1 is a functional block diagram of an image processing apparatus 100 according to the first embodiment.
The image processing apparatus 100 according to the present exemplary embodiment includes an image data input unit 101, a data storage unit 102 (image data storage unit), an inclination correction mode setting unit 103, a document edge / throat detection unit 104 (edge detection unit), and a document document. A single-side storage unit 105 (page data storage unit), an inclination detection unit 106, an inclination correction unit 107, an original integration unit 108, an image forming unit 109, and the like are provided. These are functional units realized by the CPU executing various control programs for tilt correction processing developed on the RAM.

  The image data input unit 101 is a functional unit that inputs image data of a document read by the scanner 201.

  The data storage unit 102 is a functional unit that temporarily stores image data input via the image data input unit 101. This image data is stored in the RAM.

  The tilt correction mode setting unit 103 is a functional unit that acquires a tilt correction instruction command set by the user when reading a double-page spread document. The correction instruction is issued from the inclination correction designation interface 400 of the operation panel 206, and details thereof will be described later.

The document edge / throat detection unit 104 acquires image data stored in the data storage unit 102 during tilt correction, detects the document edge / throat portion, and rotates the rotation reference for tilt correction. It is a functional unit that calculates points.
Here, the “throat portion” refers to a connecting portion between a plurality of read originals and originals, and in the case of a double-page original (for example, bookbinding), corresponds to a “closing” portion.

  A single-sided document storage unit 105 is a functional unit that stores image data of each side (left side and right side) divided on the basis of the throat detected by the throat detection unit 104 of the original. These image data are stored in the RAM.

  The tilt detection unit 106 is a functional unit that calculates the tilt angle of the image data of each side stored in the single-sided storage unit 105 of the document.

  The tilt correction unit 107 is a functional unit that corrects the tilt of the document image by rotating the image data of each surface based on the tilt angle calculated by the tilt detection unit 106 with the reference point as the origin.

  The document integration unit 108 is a functional unit that integrates image data of each surface corrected by the inclination correction unit 107 into one page.

  The image forming unit 109 is a functional unit that outputs the image data integrated by the document integration unit 108 to the printer 202.

Next, the above-described tilt correction designation interface 400 will be described with reference to FIG.
FIG. 4 is a diagram showing an inclination correction designation interface 400 displayed on the operation panel 206.
As shown in FIG. 4, the tilt correction designation interface 400 includes a tilt correction designation button 401 for designating tilt correction, a tilt correction release button 402 for canceling tilt correction, a print setting confirmation button 403, a paper size designation button 404, a print direction. A designation button 405, a liquid crystal display unit 406, and the like are included. These operation buttons are configured in a touch panel format.
The paper size designation button 404 and the print direction designation button 405 are pressed to set the paper size and the print direction, the skew correction designation button 401 is pushed, and the print setting confirmation button 403 is pushed, thereby correcting the skew of the printed document. A command to be instructed and information for designating the paper size and printing direction are input to the image processing apparatus 100, and a message indicating that the inclination correction of the document image has been instructed is displayed on the liquid crystal display unit 406.

  Next, the operation of the image processing apparatus 100 including the above-described functional units will be described with reference to FIG. FIG. 3 is a flowchart illustrating the operation of the image processing apparatus 100 according to the first embodiment. In the operation of this embodiment, a case where a spread original is read by the scanner 201 will be described.

  First, in step S <b> 301, commands and information such as a spread document tilt correction instruction, a paper size, and a printing direction set by the user on the operation panel 206 are input to the tilt correction mode setting unit 103.

  In step S <b> 302, when the user presses the reading start button 207 of the operation panel 206, reading of the spread original is started by the scanner 201, and the generated image data is stored in the data via the image data input unit 101. Stored in the unit 102.

  In step S303, based on the image data stored in the data storage unit 102, the document edge and throat detection unit 104 detects the document edge and throat, and performs tilt correction (rotation of image data). A reference point for performing is calculated. Details of the edge, throat, and reference point calculation processes will be described later.

  In step S304, the image data stored in the data storage unit 102 is divided into left and right pages based on the throat portion of the document calculated in step S303. 105 is stored. At this time, as shown in FIGS. 6C-1 and 6C-2, the image data of the single-sided page is stored in each memory area having the same size as the original image, but the throat portion with the other single-sided page. Is set to white.

  Next, in S305, the tilt detection unit 106 calculates the tilt angle of the document image based on the image data of one side of the document stored in the single-sided storage unit 105 of the document, and based on the calculated tilt angle. In the tilt correction unit 107, tilt correction of each image data is performed by rotation processing. Details of the tilt angle calculation and tilt correction will be described later.

  Next, in S306, the image data of the right single-sided page and the left single-sided page corrected in inclination in S305 are integrated into a single-page spread original document size. Details of the integration of the image data will be described later.

  In step S <b> 307, the image data integrated into one page is output to the printer 202 via the image forming unit 109, and is printed as a spread original with no inclination by the printer 202.

  Here, the details of the calculation processing of the edge, throat, and reference point in S303 described above will be described based on FIG. 5 using FIG. FIG. 5 is a flowchart showing processing for detecting a throat portion of a document, and FIG. 6 is an explanatory diagram of document edge detection processing.

  First, in step S501 in FIG. 5, a virtual scanning line is drawn in the document edge / throat detection unit 104 to divide the read spread original image into, for example, six equal parts in the vertical and horizontal directions (FIG. 6A). -1) and (b-1)), a luminance distribution diagram of pixels on the virtual scanning line is created (see FIGS. 6A-2 and 6B-2). 6A and 6B, the horizontal axis indicates the position of the pixel on the virtual scanning line, and the vertical axis indicates the luminance of the pixel. By increasing the number of divisions (number of scanning lines), the edge detection accuracy can be improved.

In step S502, the long side and the short side of the document are determined from the created luminance distribution diagram. In the luminance distribution diagram, large valleys present at both ends in the horizontal axis direction are portions where the luminance of the pixels before and after that changes greatly, and this portion is determined to be the edge of the document.
The distance between the valleys of the luminance is obtained, and the longer side is determined as the long side and the shorter side is determined as the short side.

Next, in S503, an arbitrary point on the long side and an arbitrary point on the short side obtained in S502 are selected, and by connecting these points, the long side edge shown in FIG. Iy1, Iy2 and short-side edges Ix11, Ix12, Ix21, Ix22 shown in FIG. 6B-1 are detected.
Further, a large valley at the center in the horizontal axis direction in FIG. 6A-2 is due to a change in luminance at the boundary between the pages of the spread original, and from this portion, as shown in FIG. A throat Iy is detected.

Next, in S504, from the point where the long side edges Iy1, Iy2 detected in S503, the short side edges Ix11, Ix12, Ix21, Ix22, and the throat portion Iy intersect, respectively, FIG. ), End points p1, p2, p3, and p4 of the edge and end points m1 and m2 of the throat are obtained.
In FIG. 6 (b-1), the length of the line segment (m1-p1) and the line segment (m2-p2) is on the left side, and the line segment (m1-p3) and the line on the right side. When the length of the minute (m2-p2) satisfies the conditions of the following expressions (1) and (2), the end point m1 of the throat Iy becomes the rotation reference point (x1, y1). Further, in the following formulas (1) and (2), when the magnitude relations of the lengths of the respective line segments are reversed, the end point m2 of the throat Iy becomes the rotation reference point (x2, y2).
Line segment (m1-p1)> Line segment (m2-p2) (1)
Line segment (m1-p3)> Line segment (m2-p4) (2)

  Next, details of the inclination correction processing in S305 described above will be described with reference to FIG. FIG. 7 is a flowchart showing the inclination correction process, and FIG. 8 is an explanatory diagram of the block area selection process.

  First, in S701 of FIG. 7, edge region extraction processing by a Sobel filter is performed on the image data of each single-sided page stored in the single-sided storage unit 105 of the original in S304, and the extracted edge data (intermediate) Tone data) is binarized at a predetermined threshold value, so that outline feature points of the image are extracted. FIG. 8A shows an original document image read obliquely, and FIG. 8B shows an edge-extracted document image. In FIG. 8B, the pixel of the contour feature point is shown in black and the background pixel is shown in white.

Next, in S702, the proximity feature points of the contour feature points extracted in S701 (the white pixels in the contour feature points generated during binarization in relation to the threshold value) are obtained.
That is, with respect to the background pixel (white pixel), it is determined whether or not a contour feature point (that is, a black pixel) exists within a predetermined range in the vertical or horizontal direction (within the connection interval). Is present, it is determined that the white pixel is a contour feature point. If no black pixel exists within a predetermined range with respect to the background pixel (white pixel), it is determined that the white pixel is the background.

FIG. 9 is an explanatory diagram illustrating the proximity feature point determination process. As shown in FIG. 9, first, in S901, the pixel discrimination count (Count) is initialized to 0, and the horizontal direction of a certain background pixel (white pixel) is determined from the right pixel.
If it is determined in S902 that the rightmost pixel on the right side is not a character (black pixel), in S903, the pixel on the right side of that pixel is further determined, and the number of determinations is updated by one.
In S904, the number of determinations (Count) is compared with the connection interval, and if the number of determinations is smaller than the predetermined connection interval, the process returns to S902 and the same processing (pixel determination) is performed. If the number of times of determination becomes larger than a preset connection interval, it is determined in S909 that this pixel is not a proximity feature point. This process (S902 to S904) is repeated until the pixel determination position reaches the right edge of the image.

On the other hand, if it is determined in S902 that the right pixel is a character (black pixel), the pixel on the left side of the pixel is determined in S905.
If it is determined in S906 that the nearest pixel on the left is not a character (black pixel), in S907, the pixel on the left is further determined, and the determination count is updated by one.
In S908, the number of determinations (Count) is compared with the connection interval. If the number of determinations is smaller than the predetermined connection interval, the process returns to S906 and the same processing is performed. If the number of times of determination becomes larger than a preset connection interval, it is determined in S909 that this pixel is not a proximity feature point. This process (S906 to S908) is repeated until the pixel determination position reaches the left edge of the image.

  Here, the unit of the connection interval is set by the number of pixels.

  If it is determined in S906 that the determined pixel is a character (black pixel), it is determined in S910 that this background pixel is a proximity feature point in the horizontal direction.

  Next, returning to FIG. 7, in step S703, the contour feature points extracted in step S701 and the proximity feature points detected in step S702 are recognized as region feature points, and as shown in FIG. A plurality of rectangular regions (block regions B1, B2, B3) of the smallest unit including adjacent region feature points are created for all the pixels in the inside.

  In step S704, the inclination angle of the character string in the block area is calculated from the block areas B1, B2, and B3 created in step S703. In this embodiment, in order to improve the calculation accuracy of the tilt angle, the block area having an extremely large width and height and an extremely small block area are excluded from the created block areas.

  Here, the details of the calculation procedure of the tilt angle will be described with reference to FIG.

  FIG. 8 (c) shows a plurality of block areas created in S703, FIG. 8 (d) shows a procedure for calculating an inclination angle from an arbitrary block area, and in FIG. Indicates a character pixel, and the others are background pixels.

In FIG. 8D, a character pixel that is one pixel lower than the upper side of the selected block area is determined. The small square area is the identified character pixel. When the position of the character pixel is determined and the character pixel is concentrated on the upper right side of the rectangular area, it is determined that the character string in the block area is inclined upward, and conversely, the upper left side of the rectangular area If the character string is concentrated on the character string, it is determined that the character string is inclined upward.
The example in FIG. 8D is a character string that rises to the right. In the case of rising to the right, the leftmost pixel (indicated by a solid black square) is selected from the determined character pixels, and the pixel position is recorded. This operation is repeated for every character string in the block area while descending one pixel each time. Then, by connecting the selected character pixels (solid black squares) with a straight line, a straight line La at the upper end of the character string is obtained, and the straight line La rises to the right. On the other hand, when the character string rises to the left, the rightmost pixel is selected from the determined character pixels.

  Similarly, character pixels are discriminated from the lower side of the block area in units of pixels, the rightmost pixel position from the discriminated character pixel is recorded, and this operation is repeatedly executed while increasing by one pixel each time. . Then, by connecting the selected character pixels (solid black squares) with a straight line, a straight line Lb at the lower end of the character string is obtained, and the straight line Lb rises to the right. On the other hand, when the character string goes up to the left, the leftmost pixel is selected from the determined character pixels.

  Next, a straight line passing through the center of the upper and lower straight lines La and Lb is defined as a character line inclination straight line Lc, and an angle θ (inclination angle θ) formed by the inclination straight line Lc and a horizontal straight line (lower side) of the block area is obtained. Calculated.

  The calculation processing of the inclination angle θ described above is performed for a plurality of block areas, and the average value of the calculated inclination angles θ of the block areas is the inclination angle of the image data on one side of the document.

Next, returning to FIG. 7, in S705, based on the inclination angle θ calculated in S704, the rotation processing of the image data based on the reference point (x1, y1) is performed by the following equations (3) and (4). Done.
x ′ = (x−x1) cos θ− (y−y1) sin θ + x1 (3)
y ′ = (x−x1) sin θ + (y−y1) cos θ + y1 (4)
Here, (x ′, y ′) is the pixel position of the rotation-corrected image, (x, y) is the pixel position of the single-sided image stored in the single-sided storage unit 105 of the document, and (x1, y1) ) Indicates the reference point obtained in S504.

  Next, details of the integration of the image data in S306 described above will be described with reference to FIG. FIG. 10 is a flowchart showing the integration process of the tilt-corrected area.

  First, in S1001, the image data of the right single-sided page and the left single-sided page whose inclination has been corrected in S705 is integrated into a single-page spread original document size and stored. At the time of integration, on each page of the right side and the left side, there may occur a case where both pixel portions that protrude from the rotation reference point (x1, y1) to the outside of the horizontal edge overlap each other. Not set as white.

  In step S1002, a straight line (throat) (not shown) is drawn perpendicularly to the long side of the document image from the rotation reference point (x1, y1).

As described above, according to the first embodiment, the read original image is divided into the left and right from the “throat” portion, the inclination of each divided image data is corrected, and the corrected image data are integrated into one page. Thus, for example, even when a two-page spread original set with an inclination is read, image data without inclination can be obtained on both the left and right pages. By printing this corrected image data, the user can It is possible to obtain a print image of an easy-to-read spread original.
In the first embodiment, the spread original is described as an example of the original to be read. However, the present invention is naturally applicable to, for example, a case where two originals are simultaneously set on the mounting table 203 of the scanner 201. Even if these two originals are set to be inclined, a print image of the original whose inclination is corrected is obtained in the same manner as described above.

FIG. 11 is a functional block diagram of the image processing apparatus 100 according to the second embodiment.
The image processing apparatus 100 according to the present exemplary embodiment includes an image data input unit 101, a data storage unit 102, an inclination correction mode setting unit 1103, a document long / short side detection unit 1104, a print area copy unit 1105, a document forming unit 1108, and an inclination correction unit. 107, an inclination detecting unit 106, an image forming unit 109, and the like. Similar to the first embodiment, these functional units are realized by a CPU (not shown) executing various control programs for tilt correction processing developed on a RAM (not shown).
Of the above functional units, the image data input unit 101, the data storage unit 102, the tilt correction unit 107, the tilt detection unit 106, and the image forming unit 109 are the same as those in the first embodiment (FIG. 1), and are denoted by the same reference numerals. The description is omitted.

  The inclination correction mode setting unit 1103 is a functional unit that acquires an inclination correction instruction command and a single-sided printing instruction command set by the user when reading a spread original. These instructions are set from the tilt correction designation interface 1200 of the operation panel 206 shown in FIG.

  As shown in FIG. 12, an inclination correction designation interface 1200 according to this embodiment is obtained by adding a single-sided print button 1203 to the configuration of the first embodiment (FIG. 4). When printing one side of a spread original, this single-sided print button 1203 is pressed. Further, when the tilt correction designation button 401 is pressed, the tilt correction of one side of the original can be performed. The other various buttons and the display unit are the same as those in FIG.

  A document long / short side detection unit 1104 obtains image data stored in the data storage unit 102 to detect an edge of the document, and determines a long side and a short side on one side of the print from the detected edge length. Part.

  The print area copy unit 1105 is a functional unit that sets a print area based on the long side and the short side detected by the long and short side detection unit 1104 of the document, and stores image data of a single-sided page in the set print area. .

  The document forming unit 1108 is a functional unit that edits the image data corrected by the inclination correcting unit 107 into a print size.

  Next, the operation of the image processing apparatus 100 including the above-described functional units will be described with reference to FIG. 13 using FIG. FIG. 13 is a diagram illustrating the operation of the image processing apparatus 100 according to the second embodiment, and FIG. 14 is an explanatory diagram of single-sided printing of a document. Here, a case where the user prints only one side of a spread original will be described.

  First, in step S <b> 1301, commands and information, such as a single-sided printing instruction for single-page spread, an inclination correction instruction, a paper size, and a printing direction, set by the user on the operation panel 206 are input to the inclination correction mode setting unit 1103.

In step S <b> 1302, when the user presses the reading start button 207 of the operation panel 206, reading of the spread original by the scanner 201 is started, and the read image data is stored in the data storage unit via the image data input unit 101. 102.
When reading the original, as shown in FIG. 14 (a), the original is placed on the mounting table so that one side of the spread original can be completely read and a part of the other side can be read. 203.
FIG. 14B shows a luminance distribution diagram in the horizontal direction (document reading direction) created based on the acquired image data. In this luminance distribution diagram, the large valley on the left side in the horizontal axis direction is determined as the throat portion of the spread document, and the large valley on the right side is determined as the edge of one side of the document.

  In step S1303, the document long and short side detection unit 1104 detects the long side and the short side of one side of the document from the positions of the throat and the edge, and sets the print area based on the long side and the short side. At the same time, image data on one side of the original corresponding to the print area is stored in the print area copy unit 1105.

  In step S <b> 1304, the tilt detection unit 106 and the tilt correction unit 107 calculate the tilt angle θ of the image based on the image data stored in the print area copy unit 1105, and perform tilt correction of the image data. This tilt correction process is the same as the process of S305 in the first embodiment (FIG. 3), and a description thereof will be omitted.

  In step S1305, the document forming unit 1108 edits the image data corrected in step S1304 into document data that matches the print size. Specifically, the corrected document image is moved so as to be positioned at the center of the print page.

  In step S <b> 1306, the document data is output to the printer 202 via the image forming unit 109, and a one-sided image of the document with no inclination is printed by the printer 202.

  As described above, according to the second embodiment, the printing area is set by detecting the long and short sides of one side of the original from the read spread original image data, the image data is stored, and the inclination is detected from the image data of the printing area. Since the image data is corrected and the corrected single-sided image data is edited into one page, when only one side of a two-page spread original is read and printed, Even if a part of the image on the other side is read, only the original surface desired by the user can be printed in an easy-to-view state without inclination.

In this embodiment, the image processing apparatus of the present invention is applied to a copying machine. However, it can also be applied to a multifunction machine.
Further, although a scanner is used as an image data input device, the present invention can also be applied to a form in which a plurality of image data stored in a recording medium such as a hard disk is acquired via a communication network.

1 is a functional block diagram of an image processing apparatus according to Embodiment 1. FIG. 1 is a diagram showing an overview of an image forming apparatus according to the present invention. 3 is a flowchart illustrating an operation of the image processing apparatus according to the first embodiment. It is a figure which shows the inclination correction designation | designated interface by Example 1. FIG. 6 is a flowchart showing processing for detecting a throat portion of an original. FIG. 11 is an explanatory diagram of document edge detection processing; It is a flowchart which shows an inclination correction process. It is explanatory drawing of a block area | region selection process and a character string inclination calculation process. It is explanatory drawing which shows the determination process of a proximity | contact feature point. It is a flowchart which shows the integration process of the area | region where inclination was corrected. 6 is a functional block diagram of an image processing apparatus according to Embodiment 2. FIG. It is a figure which shows the inclination correction designation | designated interface by Example 2. FIG. 10 is a flowchart illustrating an operation of the image processing apparatus according to the second embodiment. It is explanatory drawing of single-sided printing of a document.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Image processing apparatus 102 Data storage part (image data storage part)
103 Tilt correction mode setting unit 104 Document edge / throat detection unit (edge detection unit)
105 Document single-sided storage (page data storage)
106 Inclination Detection Unit 107 Inclination Correction Unit 108 Original Integration Unit 200 Copier (Image Forming Apparatus)
201 Scanner (image reading device)
202 Printer 1103 Inclination Correction Mode Setting Unit 1104 Long / Short Side Detection Unit of Document (Long / Short Side Detection Unit)
1105 Print area copy unit 1108 Document forming unit

Claims (7)

In an image processing apparatus that reads a multi-page document and processes the obtained image data,
An image data storage unit for storing the image data;
An edge detection unit for detecting an edge of the document and a throat portion of each page from the stored image data;
A page data storage unit for dividing the document image into pages and storing the image data based on the detected throat portion;
An inclination detection unit that detects an inclination amount of each divided document image with respect to the main scanning direction;
An inclination correction unit for correcting the inclination of the image data of each of the divided document images based on the detected inclination amount;
An image processing apparatus comprising: a document integration unit that integrates corrected image data of each page into one page.   The image processing apparatus according to claim 1, further comprising a tilt correction mode setting unit that instructs tilt correction of the read image data.   The image processing apparatus according to claim 1, wherein the document is a facing document.   An image reading device that reads a document and generates image data, an image processing device according to claim 1, and a printer that prints image data integrated by the document integration unit. An image forming apparatus. In an image processing apparatus that reads a spread document and processes the obtained image data,
An image data storage unit for storing the image data;
A long and short side detecting unit for detecting a long side and a short side of one side of the document from the stored image data;
Based on the detected long and short sides, a print area copy unit that sets a single-sided print area and stores single-sided image data in the print area;
An inclination detection unit for detecting an inclination amount of the original image in the print region with respect to the main scanning direction;
A tilt correction unit that corrects the tilt of the image data in the print area based on the detected tilt amount;
An image processing apparatus comprising: a document forming unit that edits the corrected image data of the print area into one page.   The image processing apparatus according to claim 5, further comprising an inclination correction mode setting unit that instructs inclination correction on one side of the read image data.   An image reading apparatus that reads an original and generates image data, an image processing apparatus according to claim 5, and a printer that prints image data edited by the original forming unit. Image forming apparatus.

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