JP2017208626A - Image processing apparatus and image reading device and image reading system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for generating user friendly image data, even from irregular-sized documents.SOLUTION: An image processing device includes acquisition means for acquiring front image data and back image data of a document, marking means for marking more than one of four corners of each image data acquired by the acquisition means, and mark position setting means for setting the marking position by the marking means. The mark position setting means can set so that the position of a front mark given to the front image data, and the position of a back mark given to the back image data are different on the front and back.SELECTED DRAWING: Figure 3

Description

  The present invention provides an image reading apparatus that reads an image of a document and creates image data, such as a scanner, a multifunction peripheral, or a fax machine, an image processing apparatus that processes image data, an image processing method, or an image reading apparatus. About the system.

  “Self-catering”, in which a user of an image reading apparatus such as a scanner cuts and scans a book and converts it into image data, has attracted attention. In addition, with the spread of portable image display terminals, there are an increasing number of users who take out image data created by self-cooking with a terminal and use it on the go.

JP-A-7-314844 JP 11-235549 A

  When cutting a book as in the past, the left and right margin sizes often differ between the front and back, and when the front and back of the paper separated by the book cutting is read and converted to image data, image data that is not right and left is generated. For this reason, when displayed on a display or the like as it is, the display form becomes difficult to see.

  When cutting a book, it may be possible to prevent generation of irregular image data by printing a conventionally known registration mark (see Patent Documents 1 and 2) on a paper surface. Or a registration mark must be printed in advance, which is troublesome.

  The present invention provides a technique for generating image data that can be easily viewed by a user even if the image data is obtained from an irregular document.

  The present invention includes an acquisition unit that acquires front image data and back image data of a document, a mark application unit that applies marks to two or more corners of the four corners of each image data acquired by the acquisition unit, Mark position setting means for setting the position of mark application by the mark application means, and the mark position setting means includes a position of a front mark to be applied to the front image data and a back mark to be applied to the back image data. The image processing apparatus is characterized in that the position can be set differently between the front and back sides.

  According to the present invention, it is possible to realize an image processing apparatus, an image reading apparatus, and an image reading system that generate image data that can be easily viewed by a user even if the image data is obtained from an irregular document.

1 is a plan view illustrating a configuration example of an image reading apparatus according to a first embodiment of the present invention. FIG. 5 is a plan view showing another configuration example of the image reading apparatus according to the first embodiment of the present invention. 1 is a functional block diagram of an image reading apparatus according to Embodiment 1 of the present invention. 1 is a block diagram showing a configuration example of a mark addition system according to Embodiment 1 of the present invention. The flowchart which shows the operation example of the mark addition system which concerns on Embodiment 1 of this invention, Schematic which shows the mark shape example of this invention. The block diagram which shows the structural example of the mark addition system in Embodiment 2 of this invention. The flowchart which shows the operation example of the mark addition system which concerns on Embodiment 2 of this invention. The block diagram which shows the structural example of the mark addition system which concerns on Embodiment 2 of this invention. The flowchart which shows the operation example of the mark addition system which concerns on Embodiment 3 of this invention.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiment described below shows an example when the present invention is specifically implemented, and is one of the specific examples of the configurations described in the claims.
<Embodiment 1>
First, a configuration example of the image reading apparatus according to the present embodiment will be described with reference to FIGS. 1 and 2.

  In the present embodiment, for example, an image reading apparatus as illustrated in FIG. 1 or FIG. 2 will be described as an example. However, processing of image data acquired by other image reading apparatuses may be a processing target of the present invention. Is possible.

  An image reading apparatus 1 shown in FIG. 1 is a sheet feed type scanner that reads and separates a plurality of documents one by one.

  Reference numeral 2 denotes a document table on which documents are stacked. Reference numeral 3 denotes a paper feed roller for taking a document into the conveyance path. Reference numeral 4 denotes a separation pad for separating documents one by one. By separating the second and subsequent originals so that the separation pad 4 does not enter the conveyance path, the originals can be conveyed one by one.

  Reference numeral 5 denotes a conveyance path. Reference numeral 6 denotes a conveyance roller pair. The original is conveyed one by one on the conveyance path 5 by the conveyance roller pair 6.

  Reference numeral 7 denotes an image reading unit. The original is irradiated with light, and the reflected light is collected by a lens and received by a photoelectric conversion element, thereby generating analog image data.

  Further, by arranging such image reading units 7 above and below the conveyance path, it is possible to read images on both sides of the document with one conveyance.

  Reference numeral 8 denotes a paper discharge roller pair. The document is discharged from the conveyance path 5 by the discharge roller pair 8.

  The image data read by the image reading unit 7 is composed of one page or a plurality of pages. Note that the image processing unit 10 may have some or all of the functions in an external device such as a personal computer instead of in the image reading device 1.

  This image reading apparatus 1 is a one-pass double-sided reading scanner that can read images on both sides of a document with a single conveyance by arranging two image reading units 7 above and below the conveyance path.

  In the case of such an image reading apparatus 1, the double-sided image of the document can be read by one transport, but two image reading units 7 must be provided. On the other hand, the image reading apparatus 21 shown in FIG. 2 has one image reading unit 7 arranged only on one side of the conveyance path, conveys the document once, reads one side first, turns it over, and conveys it again. This is a two-pass duplex scanner that scans both sides.

  The operation of this two-pass duplex scanning scanner will be described with reference to FIG. The same components as those in the image reading apparatus 1 in FIG.

  21 is a plan view of a sheet-feed type image reading apparatus of a two-pass double-sided reading method. The operation will be described along the order in which the document passes. Reference numeral 22 denotes a conveyance path switching unit. It can move up and down in the transport path.

  When moved downward in the figure, the original conveyed from the left side of the conveyance path is conveyed to the right side in the figure.

  The document passes over the image reading means 7 and reads the image on the surface. Reference numeral 23 denotes a front / back reversing conveying means.

  The document coming from the left side of the transport path passes through the front / back reversing means 23 in the counterclockwise direction, so that the front and back are reversed, and again passes through the transport path from right to left.

  Then, the original passes again over the image reading unit 7, and the image reading unit 7 reads the surface opposite to the previously read surface.

  The conveyance path switching means 22 moves downward in the figure to convey the document coming from the right side of the conveyance path in the figure downward. Reference numeral 24 denotes a paper discharge tray. Documents discharged to the lower side in the figure are sequentially stacked on the discharge tray 24.

  In the two-pass double-sided scanning scanner, the operation of reversing the front and back of the document may be performed by providing a front / back reversing unit, or may be manually repositioned by a user without providing a front / back reversing device.

  In addition, although the image that can be read at a time is only one page as in the flatbed scanner, a method such as creating image data of a plurality of pages from sequentially read images may be used, and there are various methods for reading both sides of the document. There is.

  For this reason, the image reading apparatus to which the present invention is applied is not limited to the form as shown in FIG. 1 or 2 described above, and any system can be used as long as it can create image data of a plurality of pages.

  Here, the function of the image reading apparatus described above will be described with reference to FIG. FIG. 3 is a functional block diagram of the image reading apparatuses 1 and 21 described above.

  In FIG. 3, the control unit 115 performs various controls of the image reading apparatus by executing various control programs stored in the nonvolatile memory 111 using the RAM 116 as a work memory. The control unit 115 communicates with an external device such as the computer 118 via the communication interface 117.

  The image reading control unit 112 instructs the image reading unit 7 to read a document image, converts the read image into image data, and stores the image data in the RAM 116. The image processing unit 114 performs various image processing on the image data stored in the RAM 16. The RAM 116 stores various setting values in addition to the image data of the document image.

  Next, an example of image reading processing will be described. When instructed to read the original image from the computer 118, the control unit 1115 drives the transport drive system by a motor (not shown).

  When the front of the document is detected by the sensor in front of the image reading unit 7, the control unit 115 instructs the image reading unit 112 to start reading. When the image reading control 112 is instructed to start reading, the image reading unit 7 acquires the image data of the double-sided image of the document, and stores the acquired image data in the RAM 116. The control unit 115 detects the end of the document with a discharge sensor, and controls the conveyance system to discharge the document to the outside of the apparatus.

  When the image data is stored in the RAM 116, the control unit 115 instructs the image processing unit 114 to perform image processing on the image data. When image processing is instructed, the image processing unit 114 performs various image processing such as shading correction and color correction on the image data. When the image processing by the image processing unit 114 is completed, the control unit 115 transmits the image data stored in the RAM 116 to the computer 118 via the communication interface 117, and ends the reading process.

  Here, the digital image data obtained by converting the analog image data created by the image reading unit 7 by the A / D conversion unit is input to the image processing unit 114 described above. Append, add OCR character data, compress image data.

  Next, a configuration example of the mark addition system that constitutes a part of the above-described image processing unit 114 will be described with reference to the block diagram of FIG.

  The mark addition system 100 is a part of the above-described image processing unit 114, and includes an image data input unit 101, a four-corner detection unit 102 that detects four corners of image data, and a specific mark at a corner or a position inside the corner. A mark adding unit 103 to add, a mark information registration unit 104 for registering a mark shape and an additional position, and an image data output unit 105 are provided.

  Here, the mark information registration unit 104 is an example of a mark position setting unit that sets a mark application position to be applied to the front image data and the back image data acquired by reading both sides of the document. The position of the front mark to be applied and the position of the back mark to be applied to the back image data can be set differently on the front and back sides. The setting here includes, for example, a setting action specified by a user from a user interface screen displayed on a display such as a computer.

  Next, the operation of each unit will be described with reference to the flowchart of FIG.

  In step S <b> 101, image data to be processed by this system is input to the image data input unit 101.

  Here, the image data may be a single page or multiple pages. However, if the description is made for multiple pages, the description of a single page can be included, and the effect of this system can be obtained more. Since a plurality of pages are used, image data will be described as a plurality of pages.

  The image data input to the image data input unit 101 is sent to the four corner detection unit 102.

  In step S102, the four corners of the image data are detected by the four corner detector 102. As an example of a method for detecting the four corners, a method using an edge of a boundary portion between image data and background data is known.

  The image data in which the four corners are detected by the four corner detection unit is sent to the mark adding unit 103.

  In step S <b> 103, the mark adding unit 103 refers to the mark information registered in the mark registration unit 104. Here, the mark information is information of the mark registered by the user, such as mark shape, mark addition position, number of marks added, image processing method around the mark addition position, contents of mark changes on the front page back page, etc. Is included.

  In step S104, the mark adding unit 103 adds a mark to the image data based on the mark information and the detection result of the four corner detection unit 102. Next, a mark shape to be added, an added position, an added number, and an image processing method around the added position will be described.

  The mark shape may be selected from a square bracket shape, a triangle shape, a dragonfly shape widely used for representing the cutting position, or a mark created by the user may be used. .

  As for the mark addition position, the square bracket type or the like can be arranged at the corner of the image data, but the registration mark type or the like cannot be arranged at the corner and is arranged inside. When arranged inside, the user may be able to set how much the inside is arranged.

  As an image processing method around the mark addition position, such as a registration mark type, when adding a mark inside the image data instead of the corner, if the density of the image data at the addition position is high, the mark may be added. It may be invisible.

  Therefore, the process of adding a mark is performed after reducing the density of the image data at the position to be added. As another example, when the density of the image data at the position where the mark is added is high, the mark may be added with a light color, for example, white or black border white.

  The number of marks may be three corners or two diagonal corners in addition to being added to the four corners. Since the display part of the terminal is often rectangular, if the mark is added at least at the two corners, the enlargement ratio can be adjusted when auto-enlarged display is performed. .

  Next, the mark addition position and the shape change on the front page back page will be described. Thus, in order to explain the case where the document is a book, the front page and the back page are expressed as even pages and odd pages.

  Here, when the original is a book cut out, there are binding margins, so there are cases where the margin amounts for the even margins and odd pages differ. For this reason, when the scanned image data is displayed on the terminal, the direction in which the images are shifted between the even-numbered pages and the odd-numbered pages changes, which may be difficult to see.

  Therefore, in order to delete and display the long margin on the binding side, the mark addition position is changed between the even page and the odd page.

  The user can set how much the mark to be added to the binding side is moved inward. The moving amount may be set for each of the even-numbered page and the odd-numbered page, and when one is set, a target value may be used for the other.

  In addition, it is possible to register in which direction the book that has been a manuscript opens. Since many books are read in the left-right direction, the left-right direction will be described as an example.

  When the display screen of the terminal is rectangular and is used horizontally, by displaying two pages at the same time, the image data can be displayed in a spread like a book.

  For books that open from the left, display even pages on the left and odd pages on the right. For books that open from the right, display even pages on the right and odd pages on the left. As a result, the image data can be displayed on the terminal in a spread state like a book.

  For example, in the case of a book opened from the left, a right-pointing arrow may be added to the upper right mark, and in the case of a book opened from the right, a left-pointing arrow may be added to the upper left mark so that the terminal recognizes it. For this purpose, recognition software may be introduced on the terminal side.

  Further, the shape of the mark to be added may be changed between even pages and odd pages. If the image data is created using the blank page skip function that does not save the blank page when the book is cut and scanned, the image data on each page was originally an even page or an odd page. I don't know what happened.

  For this reason, there are cases where it is not possible to display correctly in a spread state only by registering a book opened from the right and a book opened from the left.

  Therefore, the mark to be added is changed between even pages and odd pages. For example, in the even page, the lower right corner is a triangle mark and the other corner is a bracket mark, and in the odd page, the lower left corner is a triangle mark and the other corner is a bracket mark.

  Otherwise, the even-numbered page has the lower-right corner mark removed and the other corners become a bracketed mark, and the odd-numbered page has the lower-left corner mark removed and the other corners become a bracketed mark.

  Then, if even pages or odd pages continue, it is considered that there was a blank page between them, so when displaying in a spread, the image data deleted by skipping blank pages is complemented and displayed, A spread display like a book can be made.

  The example of changing the shape of the mark has been given so far, but the same effect can be obtained by changing the color instead of the shape. However, the display terminal needs to be able to identify the color information.

  If the document is a book, use the fact that the size of the document is almost constant on all pages, and scan when there is an extremely different document length / width in the detected document length / width. You may make it cancel and inform a user.

  For this purpose, in addition to the normal mixed document scan mode, a book scan mode for implementing this function is provided to be switchable, and may be implemented only when the book scan mode is selected by the user. .

  In addition, when the document is a book, the four corner detection processing may be performed after all pages are scanned. By utilizing the fact that the document size is almost constant for all pages, the document length / width of each page can be corrected using the document length / width detection results for all pages.

  For example, for a page that is detected to have an extremely long document length or width compared to other pages, it is determined that the size detection has failed, and it is set to an intermediate value between the document length and width of the previous and next pages. Modify to be.

  By doing this, subtle differences in document width for each page of the book and differences in document width due to being cut obliquely during cutting can be absorbed well, and the original page width of consecutive pages will not feel strange. An image can be output.

  Note that when the present invention is applied to an image processing apparatus rather than an image reading apparatus, the image data created using the blank page skip function is a front image or a back image for each page. Sometimes you do n’t know.

  In this case, for example, the left and right margins of the image data are detected, a page with a large right margin is determined as a front image, and a page with a large left margin is determined as a back image. You may decide which image processing to perform.

<Embodiment 2>
In this embodiment, when displaying image data on a portable display terminal, image data that can be displayed in the direction desired by the user is created.

  A configuration example of the system according to the present embodiment will be described with reference to the block diagram of FIG.

  In addition to the system 100 of the first embodiment, the system 200 includes a registration direction registration unit 201 that registers a direction in which image data is desired to be registered, and an aspect ratio registration unit 202 that registers aspect ratio information of a terminal screen on which image data is displayed. The margin addition amount calculation unit 203 and the margin addition unit 204 are characterized.

  The margin adding unit 204 enters between the four corner detecting unit 102 and the mark adding unit 103 in the configuration of the first embodiment.

  A direction in which the user wants to gather image data is registered in advance in the registration direction registration unit 201.

  For example, when the user who uses the lower side of the display terminal wants to move the image upward, the user registers it as the upper side.

  It may be possible to select and register one of four types, top, bottom, left and right.

  The aspect ratio registration unit 202 registers the aspect ratio of the terminal screen on which image data is displayed. A plurality of types may be registered and selected from the list.

  The margin addition amount calculation unit 203 calculates the margin addition amount so that the aspect ratio after adding the margin to the image data is the same as the aspect ratio of the terminal screen registered in the aspect ratio registration unit 202.

  The margin adding unit 204 adds the margin calculated by the margin addition amount calculating unit 203 on the side opposite to the direction registered in the registration direction registering unit 201. As a result, it is possible to create image data arranged in the desired direction.

  Further, by adding a mark to the corner of the image data by the mark adding unit 103, the added margin is not deleted even when the image is automatically enlarged and displayed, and an easy-to-view image can be created.

  The operation procedure of each part will be described with reference to the flowchart of FIG.

  In step S201, image data to be subjected to image processing is read. In step S <b> 202, the moving direction registered in advance by the user is read from the moving direction registration unit 201.

  In step S 203, the aspect ratio of the display screen registered by the user in advance is read from the aspect ratio registration unit 202.

  In step S204, the margin addition amount calculation unit 203 calculates the length of the margin to be added to the image data from the registered aspect ratio and the aspect ratio of the read image data.

Here, a margin amount calculation procedure of the margin addition amount calculation unit 203 will be described. For example, when it is desired to display the image in a top-aligned manner, a margin is added to the lower side of the image. The amount of margin added is determined by the following calculation, where A: B is the aspect ratio of the image data, C: D is the aspect ratio of the terminal, and α (alpha) is the amount of margin added to the image data. I can do it.
(A + α): B = C: D
⇒ (A + α) x D = B x C
⇒ A + α = (B × C) / D
⇒ α = ((B × C) / D) −A

  By adding a margin to the lower side of the image and adding marks at the four corners, it is possible to display the image with the same image size with the same aspect ratio of the terminal screen when displayed on the terminal.

  Here, a calculation example is shown in which the alignment direction is top alignment and the margin is added to the lower side. However, when the alignment direction is lower and the margin is added to the upper side, the same calculation can be performed.

Similarly, if you want to display it right-justified, add a margin on the left side. The added amount of margin is obtained by the following calculation, where the aspect ratio of the image data is A: B, the aspect ratio of the terminal is C: D, the amount of margin added to the image data is β (beta). I can do it.
A: (B + β) = C: D
⇒ (B + β) x C = A x D
⇒ B + β = (A × D) / C
⇒ β = (A × D) / CB

  By adding a margin β to the left side of the image and adding marks to the four corners, it is possible to display the image with the same image size as the aspect ratio of the terminal screen when it is displayed on the terminal.

  Here, a calculation example in which the alignment direction is right alignment and the margin is added to the left side is shown, but the same formula can be used when the alignment direction is left side and the margin is added to the right side.

  In step S205, a margin of the length calculated in step S203 is added to the opposite end of the registration information registered by the user. For example, if the desired direction is up, a margin is added on the lower side.

  As a result, an upper image is displayed on the display device. From here, it is the same as the first embodiment.

  In step S206, a corner of the image is detected. In step S207, a mark is added to the corner of the image.

  The image data created in this way can be displayed without being deleted even if it is automatically enlarged on a portable display device, and can be moved in the direction desired by the user, and has the same aspect ratio as the display screen. The largest image can be displayed.

  In the present embodiment, the case where the image is brought up is shown. However, when the user uses the terminal, the positions of the person such as the person having the lower side and the person having the left side are various.

  Therefore, for the person with the lower side, the lower side of the screen is easier to hide with the finger, so it is considered easier to see the image displayed with the upper side. Similarly, for the person with the left side, the left side of the screen is It is considered that it is easier to see if the image is displayed right-justified. Therefore, it is possible to provide an easy-to-see image by adding a blank after adding the image in the direction desired by the user and adding a mark at the corner of the image.

  In addition, since the structure of this embodiment can be added to the structure of Embodiment 1, the effect described in Embodiment 2 can be added to the effect described in Embodiment 1. FIG. For example, in the example in which the display position of the image is aligned by changing the position where the mark is added in the even page and the odd page of the original image data and not displaying the binding margin in the first embodiment, first, the binding is performed. After creating the image data with the white space removed, create the easy-to-read image with the same display position on the even and odd pages, and in the direction desired by the user, by implementing the second embodiment. I can do it.

<Embodiment 3>
Image data scanned by cutting novels or the like may have a common amount of margins on all pages. If it is a common amount of blank space, it is considered that if the image is deleted from all pages and displayed, the image in the central portion is enlarged and displayed. Therefore, by adding a mark inward from the edge of the image by a common amount of blank space, the center portion is greatly enlarged when the image is automatically enlarged and displayed on the terminal, thereby creating an easy-to-view image.

  Note that the margin amount of even-numbered pages and odd-numbered pages may differ due to the binding margin. For example, in the case of a book that sends pages in the horizontal direction, the left and right margins may be obtained separately for even and odd pages, and the vertical and vertical margins may be shared between even and odd pages.

  A configuration example of the system according to the present embodiment will be described with reference to the block diagram of FIG. As shown in FIG. 9, the system 300 according to the present embodiment is characterized by having a margin amount detection unit 301 in addition to the system 100 of the first embodiment. The margin amount detection unit 301 enters between the four corner detection unit 102 and the mark addition unit 103 of the configuration of the first embodiment.

  An operation in which the margin amount detection unit 301 detects the margin amount will be described with reference to the flowchart of FIG. The density of the margin and the image data is different such that the margin is light and the image data is dark.

  Therefore, in step S301, the density is checked from the image edge toward the center. In step S302, it is determined whether the density has changed by a predetermined value or more. If changed, the position is recorded as a density change point in step S303.

  The position where the density change points are collected and the distance from the image edge is the minimum is the position representing the margin amount of the page. However, when noise components and dust are captured, it may be erroneously detected as image data. For example, a method of ignoring a certain number of data from the minimum value can be considered.

  In addition, when there is a certain number or more of change point data within a certain variation range (for example, when there is data of one character), a method of setting the position representing the amount of margin can be considered. Since the margins exist on the top, bottom, left, and right of the page, the density change points are obtained on the top, bottom, left, and right, respectively, and the amount of margin is obtained.

  The amount of margin is detected over a plurality of pages. The number of pages to be detected can be set in advance by the user, and for example, the processing time can be shortened by detecting the amount of blank space by 10 pages. Of course, by detecting the margin amount of all pages, the processing time is required, but the accuracy of detecting the margin amount may be improved.

  The amount of margin common to all pages is obtained from the result of detecting the amount of margin on the top, bottom, left and right of each page over a plurality of pages. For example, a common margin amount may be used by using the minimum values of the top, bottom, left, and right. Alternatively, a histogram may be created, and the value with the highest number of appearances may be used as the common margin amount, or the position moved from that value to the fixed amount end may be used as the common margin amount.

  The mark adding unit 103 uses the common margin amount obtained by the margin amount detection unit 31 to add a mark to a position on the inner side from the end portion by the margin amount on all pages. As a result, when auto-enlarged display is performed on the terminal, it is possible to display after deleting a common amount of white space, so that an easy-to-view image that can display the central image portion large without changing the enlargement ratio on each page is created. I can do it.

  Note that there are cases in which the amount of blank space for an illustration page or the like differs greatly from other text pages. For this reason, for example, when there is image data that is significantly different from other pages in the margin portion, it may be determined that the page is an illustration page, and a mark may be added without deleting the margin. Alternatively, the user may be able to specify the illustration page and change the mark addition position.

<Embodiment 4>
Since the document is tilted when the image is read by the image reading apparatus, the read image may also be tilted.

  When the read image size is designated as a fixed size (A4 or the like), if the document is tilted, the image of the document may protrude and the amount of blank space may differ from other pages. If a mark is added to a corner of an image that is tilted, the image may be displayed at an unintentional enlargement ratio, such as a small image when automatically enlarged and displayed on a terminal.

  Also, when the scanned image size is set to automatic size (the image size is determined according to the size of the document), if the document is tilted, the image will be larger and the amount of margin will be smaller than that of other pages. May become very large. Again, if you add a mark to the corner of an image that is tilted, it may be displayed at an unintended enlargement rate, such as a very small image when automatically enlarged on the terminal There is sex.

  Therefore, first, in the configuration of the present embodiment, the inclination of the image is detected and corrected (referred to as skew correction processing).

  By correcting the tilt of the image and then adding a mark to the corner of the image, the amount of margin is the same as that of an image that is not tilted, and an image that is easy to view can be created even if the image is automatically enlarged.

<Embodiment 5>
In the first embodiment and the third embodiment, the example in which the mark is added inside the corner of the image is shown. The outside of the mark is a margin, which is deleted by automatic enlargement display of the terminal. However, if there is image data such as dust outside the mark, it will be recognized as an image when automatically enlarged and displayed on the terminal, and will become a small image when automatically enlarged and displayed on the terminal. It may be displayed at an unintended enlargement rate.

  Therefore, an isolated point removal process is performed to remove image data such as dust from the margin part outside the added mark.

  As a result, since image data that has entered suddenly such as dust can be removed, dust is not recognized as an image and can be prevented from being displayed at an unintended enlargement rate.

  As mentioned above, although this invention was demonstrated in detail based on Embodiment 1-5, this invention is not limited to Embodiment 1-5 mentioned above.

  For example, the present invention includes the following forms.

As an aspect of the present invention, an acquisition unit that acquires front image data and back image data of a document, and a mark application that adds marks to two or more corners of the four corners of each image data acquired by the acquisition unit And mark position setting means for setting the position of mark application by the mark application means. The mark position setting means provides the position of the front mark to be applied to the front image data and the back image data. The image processing apparatus is characterized in that the position of the back mark to be set can be set differently on the front and back sides.
According to this aspect of the present invention, since the mark position to be applied to the front and back images can be arbitrarily set, if the subsequent display is performed based on the mark, irregular display can be avoided.

In the present invention described above, the image forming apparatus further includes a margin adding unit that adds a margin area to each image data acquired by the acquiring unit, and the mark providing unit includes the image after the margin is added by the margin adding unit. A mark may be added to the data at a position based on the setting of the mark position setting means.
According to this aspect of the present invention, it is possible to add a mark to an arbitrary position with respect to image data after adding a margin.

In the present invention, the mark applying means is a position inside the corner of each image data based on a margin amount of each image data acquired by the acquiring means, and is set by the mark position setting means. It is good also as giving a mark to the position based on.
According to this aspect of the present invention, it is possible to add a mark in consideration of the amount of margin.

Further, in the present invention described above, the image processing apparatus further includes a skew correction unit that performs skew correction based on the inclination of each image data acquired by the acquisition unit, and the mark providing unit includes the image corrected by the skew correction unit. A mark may be added to the data at a position based on the setting of the mark position setting means.
According to this aspect of the present invention, it is possible to give an appropriate mark to an image after skew correction.

The present invention further includes an isolated point removing unit that removes an isolated point included in each image data acquired by the acquiring unit, and the isolated point removing unit uses the mark provided by the mark applying unit as a reference. An isolated point existing in a region outside the mark may be removed.
According to such an aspect of the present invention, isolated points outside the mark can be efficiently removed. Note that only isolated points inside the mark may be removed.

The present invention is also broadly applicable to an image reading apparatus comprising the above-described image processing apparatus and performing image processing by the image processing apparatus on image data obtained by reading an image while conveying a document. And
According to this aspect of the present invention, since the mark can be given in the image reading apparatus, the image display can be easily seen on the display of the external terminal (smart phone or computer) that acquired the image.

The present invention includes an image reading device that reads an image from a document and an information processing device connected to the image reading device, and the image processing device includes the information processing device. The image reading system is also widely targeted.
According to this aspect of the present invention, it is possible to add a mark to image data before being displayed by the information processing apparatus, and to display the image data whose size has been adjusted using the mark as an index on a display or the like.

Claims (7)

An acquisition means for acquiring front image data and back image data of a document;
Mark providing means for applying marks to two or more corners of the four corners of each image data acquired by the acquisition means;
Mark position setting means for setting the mark application position by the mark application means,
The image processing apparatus, wherein the mark position setting means can set the position of the front mark to be applied to the front image data and the position of the back mark to be applied to the back image data so that they are different on the front and back sides. . Further comprising a margin adding means for adding a margin area to each image data acquired by the acquiring means;
2. The image according to claim 1, wherein the mark adding unit adds a mark to a position based on a setting of the mark position setting unit with respect to the image data after the margin is added by the margin adding unit. Processing equipment.   The mark assigning means assigns a mark to a position inside the corner of each image data based on a margin amount of each image data acquired by the acquiring means and based on the setting of the mark position setting means The image processing apparatus according to claim 1, wherein: Further comprising skew correction means for performing skew correction based on the inclination of each image data acquired by the acquisition means;
The image processing apparatus according to claim 1, wherein the mark applying unit applies a mark to a position based on the setting of the mark position setting unit with respect to the image data corrected by the skew feeding correcting unit. Further comprising isolated point removing means for removing isolated points included in each image data obtained by the obtaining means,
The image according to any one of claims 1 to 4, wherein the isolated point removing unit removes an isolated point existing in a region outside the mark with reference to the mark provided by the mark providing unit. Processing equipment.   An image comprising the image processing apparatus according to claim 1, wherein the image processing apparatus performs image processing on image data obtained by reading an image while conveying a document. Reader.   6. The image processing apparatus according to claim 1, further comprising: an image reading apparatus that reads an image from a document; and an information processing apparatus connected to the image reading apparatus. An image reading system.

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