JP2015119430A - Image reading apparatus, image reading method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency in processing for deleting finger portions in a number of read images.SOLUTION: An image reading apparatus (document camera system 1) includes: initial parameter designation means (CPU 45) for designating a first parameter relating to a predetermined region on a page in the vicinity of page turning start; final parameter designation means (CPU 45) for designating the first parameter on a page in the vicinity of page turning end; determination means (CPU 45) for determining the first parameter on any arbitrary page on the basis of the first parameters designated by the initial and final parameter designation means; and correction means (CPU 45) for correcting an image on any arbitrary page on the basis of the first parameter on any arbitrary page determined by the determination means. The correction means (CPU 45) includes deletion means (CPU 45) for deleting at least a part of the predetermined region on any arbitrary page on the basis of the first parameter on any arbitrary page.

Description

  The present invention relates to an image reading apparatus, an image reading method, and a program.

Conventionally, as shown in FIG. 27, for example, an image reading apparatus 200 is known in which an imaging unit 201 is arranged above a book B in a spread state and the page P of the book B is read page by page by the imaging unit 201. ing. Here, since the size differs depending on the book B, in order to perform a reading process in accordance with the size, the image reading apparatus 200 includes only a necessary region from the image G10 acquired by the imaging unit 201 as shown in FIG. A function for specifying the document size R10 so as to be cut off is installed (see, for example, Patent Document 1).
In recent years, development of an image reading apparatus has been advanced that designates and deletes a finger portion from the image when a finger holding the page at the time of shooting is present in the read image.

JP 2006-114993 A

By the way, in the case of an image reading apparatus that deletes a predetermined part such as a finger part already known from the image, it is necessary to designate the predetermined part for each image one by one, which is troublesome for the user.
Accordingly, an object of the present invention is to improve the efficiency of deletion processing of a predetermined portion in a large number of read images.

In order to solve the above problems, according to one aspect of the present invention,
An image reading device that turns a book page by page, images the page of the book for each page by an imaging means, corrects and captures a predetermined area of the captured image,
Initial parameter designating means for designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter specifying means for specifying a first parameter relating to the predetermined area in a page near the end of turning of the page;
Determining means for determining the first parameter in an arbitrary page based on the first parameter specified by the initial parameter specifying means and the final parameter specifying means;
Correction means for correcting the image of the arbitrary page based on the first parameter of the arbitrary page determined by the determination means,
An image reading apparatus is provided, wherein the correction unit includes a deletion unit that deletes at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page.

  According to the present invention, it is possible to improve the efficiency of deleting a predetermined portion in a large number of read images.

1 is a perspective view showing a schematic configuration of a document camera system according to the present embodiment. It is explanatory drawing which shows the positional relationship of the mounting base which concerns on this embodiment, a book, and a camera. It is a top view of the mounting table and book concerning this embodiment. It is explanatory drawing which shows the modification of the mounting base of FIG. It is explanatory drawing which shows the modification of the mounting base of FIG. It is a block diagram which shows the main control structure of the document camera system which concerns on this embodiment. It is explanatory drawing which shows the state which pressed the page of the book with the left and right fingers. It is a flowchart which shows the flow of a process of image processing mode. It is explanatory drawing which shows the 1st reference | standard image. It is explanatory drawing which shows the predetermined area | region designated with respect to the first reference | standard image. It is explanatory drawing which shows the trimming area | region designated with respect to the 1st reference | standard image. It is explanatory drawing which shows the last reference | standard image. It is explanatory drawing which shows the predetermined area | region designated with respect to the last reference | standard image. It is explanatory drawing which shows the trimming area | region designated with respect to the last reference | standard image. It is explanatory drawing which shows the predetermined area | region in the first page on the left side. It is explanatory drawing which shows the predetermined area | region in the i-th page on the left side. It is explanatory drawing which shows the predetermined area | region in the last page of the left side. It is explanatory drawing which shows the trimming area | region in the first page. It is explanatory drawing which shows the trimming area | region in the i-th page. It is explanatory drawing which shows the trimming area | region in the last page. It is a flowchart which shows the flow of a deletion process. It is explanatory drawing which shows the state by which the predetermined area | region was designated with respect to the reference | standard image. It is a schematic diagram which shows the detection area of the deletion object color detected within the predetermined area. It is explanatory drawing which shows the reference | standard image after replacing the finger part in a predetermined area | region with a background color. It is a flowchart which shows the flow of a cutting process. It is explanatory drawing which shows the state by which the trimming area | region was designated with respect to the finger deletion image. It is a schematic diagram which shows the state at the time of imaging the first page with the conventional image reading apparatus. It is explanatory drawing which shows the image of the first page imaged with the image reading apparatus of FIG.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is a perspective view showing a schematic configuration of a document camera system as an image reading apparatus according to the present invention. As shown in FIG. 1, the document camera system 1 can communicate with a document camera 2 as an imaging unit that images a page P of a book B, a placement table 3 on which the book B is placed, and the document camera 2. And a connected personal computer 4. The book B according to the present invention includes not only a general book but also a bound document.

  The document camera 2 is provided with a stand portion 21 and a camera 22 attached to the upper end of the stand portion 21. The stand unit 21 can be tilted in the front-rear direction and the left-right direction and can be expanded and contracted in the vertical direction so that the relative positional relationship between the book B and the camera 22 can be adjusted. The lens of the camera 22 faces downward so that the book B is within the angle of view. A position adjustment mechanism is provided at a joint portion between the camera 22 and the stand portion 21, so that the direction in which the lens of the camera 22 faces can be adjusted.

FIG. 2 is an explanatory diagram showing the positional relationship between the mounting table 3, the book B, and the camera 22, and FIG. 3 is a top view of the mounting table 3 and the book B.
2 and 3, the mounting table 3 includes a pair of left and right holding plates 31 and 32 that can be folded by a hinge (not shown). The open book B is held on the upper surfaces of the pair of holding plates 31 and 32. The pair of holding plates 31 and 32 are provided with band-shaped holding portions 33 for holding the front cover and the back cover of book B, respectively. Further, a mark 34 serving as a reference for the position of the finger holding the page P is provided on the outer edge of the holding plates 31 and 32.

Here, in the case of the book B which is easy to open, as shown in FIG. 2, a pair of holding plates 31 and 32 are arranged flat. Then, the camera 22 is arranged above the stitches of both the left and right pages P so as to capture both the left and right pages P. Thereby, the image for two pages can be acquired by one imaging | photography.
In the case of Book B which is not easy to open completely, as shown in FIG. 4, the pair of holding plates 31 and 32 are inclined so as to be V-shaped. Then, the camera 22 is arranged above the stitches of both the left and right pages P so as to capture both the left and right pages P. Thereby, the image for two pages can be acquired by one imaging | photography.
In the case of Book B, which is difficult to open greatly, as shown in FIG. 5, the pair of holding plates 31 and 32 are adjusted so that only one page P is flat and the other page P is inclined. . The camera 22 is arranged above the flat page P. Thereby, the image for one page can be acquired by one imaging | photography. In the following description, the case shown in FIG. 2 will be described as an example.
In either case, the camera 22 may not face the page P in some cases, and it is preferable to perform trapezoidal correction on the acquired image of each page P at some stage of image processing.

Next, the main control configuration of the document camera system 1 of the present embodiment will be described. FIG. 6 is a block diagram showing a main control configuration of the document camera system 1. As shown in FIG. 6, the personal computer 4 includes a recording unit 41 that records a reference image G (see FIG. 9 and the like) captured by the camera 22 and a trimmed image obtained by trimming the reference image G, Operation means 42 such as a keyboard, a touch panel, and a mouse for inputting various operation instructions to the personal computer 4 itself, a ROM 43 in which various programs are recorded, a RAM 44 in which the programs are expanded when the programs in the ROM 43 are executed, and operations A CPU 45 is provided that develops and executes the program in the ROM 43 in the RAM 44 based on an instruction from the means 42.
When the image reading program is executed by the CPU 45 of the personal computer 4, a predetermined button of the operation means 42 is associated as a photographing button. The camera 22 shoots the book B image in conjunction with the operation of the shooting button.

Hereinafter, an image reading method by the document camera system 1 will be described.
First, the user operates the operation means 42 to cause the personal computer 4 to execute an image reading program. Thereby, first, the image capturing mode is executed. In the image shooting mode, first, the user opens the first page P of book B, places his / her finger on the mark 34, and presses the page P.
FIG. 7 is an explanatory diagram showing a state where the page P is pressed by the left and right fingers h1 and h2. In FIG. 7, a region surrounded by a dotted line is a shooting area Pa of the camera 22.
Then, the left and right pages P in this state are photographed as one image by the camera 22. Specifically, for example, a setting (self-timer setting) is made so that an image is captured after a predetermined time (for example, 3 seconds) after the shooting button is operated, and the shooting button is operated for each shooting, It suffices to turn the page P between them and hold the page P by hand. Alternatively, the area near the mark 34 may be monitored by the camera 22, and a still image may be captured when it is determined that the finger is present in the area and is stationary.
By repeating this until the last page P of the book B, the reference images G of all the pages P of one book B are recorded in the recording unit 41 of the personal computer 4.
When the shooting of the last page P is completed, the user operates the operation means 42 to prompt the personal computer 4 to end the image shooting mode. The personal computer 4 switches to the image processing mode as the image shooting mode ends.
In the following description, page numbers are assigned to each image including two left and right pages.

FIG. 8 is a flowchart showing the flow of processing in the image processing mode.
In step S1, the CPU 45 designates the first parameter and the second parameter on the first page P. That is, the CPU 45 is an initial parameter specifying unit according to the present invention. Specifically, the CPU 45 first displays the first reference image G on the screen as shown in FIG. In the case of the present embodiment, since the left-open book B is an object to be photographed, the left page P is thin and the right page P is thick in the reference image G of the first page. That is, the left page P is taken relatively small because it is far from the camera 22, and the right page P is taken relatively large because it is close to the camera 22.

  At the time of designating the first parameter, the user operates the operating means 42 to set the rectangular predetermined areas K and L so as to surround the fingers h1 and h2 overlapping the page P as shown in FIG. specify. When the operation means 42 is a mouse, the CPU 45 specifies the predetermined areas K and L by dragging so as to form the predetermined areas K and L. The coordinate values of the corners of the predetermined areas K and L are the first parameters at the beginning of turning.

  On the other hand, when specifying the second parameter, the user operates the operating means 42 to specify rectangular trimming areas Q and R so as to surround the area to be cut out from the page P as shown in FIG. The coordinate values of the corners of the trimming areas Q and R become the second parameter at the beginning of turning.

  In step S2, the CPU 45 designates the first parameter and the second parameter on the last page P. That is, the CPU 45 is an end parameter specifying unit according to the present invention. Specifically, first, the CPU 45 displays the last reference image G on the screen as shown in FIG. In the case of the present embodiment, the left-open book B is an object to be photographed, so in the last reference image G, the left page P is thick and the right page P is thin.

  At the time of designating the first parameter, the user operates the operating means 42 to set the rectangular predetermined areas K and L so as to surround the fingers h1 and h2 overlapping the page P as shown in FIG. specify. The coordinate values of the corners of the predetermined areas K and L are the first parameters at the end of turning.

  On the other hand, when the second parameter is designated, the user operates the operation means 42 to designate rectangular trimming areas Q and R so as to surround the area to be cut out from the page P as shown in FIG. The coordinate values of the corners of the trimming areas Q and R become the second parameter at the end of turning.

In step S3, the CPU 45 designates a deletion target color and a background color from the predetermined areas K and L. That is, the CPU 45 is the first designation means and the second designation means according to the present invention.
In the designation of the color to be deleted, for example, when the user designates a predetermined location of the finger portion h1 in the predetermined area K with the operation means 42, the CPU 45 sets the color at the predetermined location as the color to be deleted. Since the color of the finger portion h1 is slightly different depending on the location, it is preferable that the deletion target color is set to include a certain allowable range in advance.
Further, even if the deletion target color is not set one by one, it is also possible to set in advance a color similar to the skin color as the deletion target color. The skin color may vary depending on the race, such as white, black, or yellow races, or may vary depending on the individual. The color is different. For this reason, the permissible range recognized as skin color may be set in advance to include these, or the permissible range for each race is individually registered, and the permissible range selected according to the race used is selected. You may make it do.

  Also in the background color designation, for example, when the user designates a predetermined location other than the finger portion h1 in the reference image G by the operation means 42, the CPU 45 sets the color of the predetermined location as the background color.

In step S4, the CPU 45 sets i = 1.
In step S5, the CPU 45 determines the first parameter and the second parameter for the reference image G of the i-th page. That is, the CPU 45 is a determination unit according to the present invention.

  First, a method for determining the first parameter will be described. First, a method for determining the first parameter on the left page P will be described as an example.

FIG. 15 is an explanatory diagram showing the predetermined area K1 on the left first page P, FIG. 16 is an explanatory diagram showing the predetermined area Ki on the i-th page P on the left side, and FIG. ) Is an explanatory diagram showing a predetermined area Km on the page P.
Each corner of the predetermined region K1 is Ka (1), Kb (1), Kc (1), Kd (1), and each corner of the predetermined region Km is Ka (m), Kb (m), Kc (m ), Kd (m), and Ka (i), Kb (i), Kc (i), and Kd (i) are the corners of the predetermined area Ki on the i-th page P, the i-th page P The coordinate value of each corner of the predetermined area Ki is expressed by the following equation (1) that performs linear interpolation using the coordinate value of each corner of the predetermined area K1, the coordinate value of each corner of the predetermined area Km, and the page number. ) To (4).

Ka (i) = Ka (1). {(Mi) / (m-1)} + Ka (m). {I / (m-1)} (1)
Kb (i) = Kb (1). {(Mi) / (m-1)} + Kb (m). {I / (m-1)} (2)
Kc (i) = Kc (1). {(Mi) / (m-1)} + Kc (m). {I / (m-1)} (3)
Kd (i) = Kd (1). {(Mi) / (m-1)} + Kd (m). {I / (m-1)} (4)

By this formula, the first parameter of each page P, that is, the coordinate value of each corner of the predetermined area Ki is determined.
The same formula applies to L on page P on the right side,
La (i) = La (1). {(Mi) / (m-1)} + La (m). {I / (m-1)} (5)
Lb (i) = Lb (1) · {(m−i) / (m−1)} + Lb (m) · {i / (m−1)} (6)
Lc (i) = Lc (1). {(Mi) / (m-1)} + Lc (m). {I / (m-1)} (7)
Ld (i) = Ld (1). {(Mi) / (m-1)} + Ld (m). {I / (m-1)} (8)
Thus, the first parameter of each page P, that is, the coordinate value of each corner of the predetermined region Li is determined.
In addition, the coordinate value of each corner | angular part is calculated | required by substituting into the following formula | equation (1)-(8) separately for both X coordinate value and Y coordinate value.

  Next, a method for determining the second parameter will be described.

18 is an explanatory diagram showing trimming areas Q1 and R1 on the first page P, FIG. 19 is an explanatory diagram showing trimming areas Qi and Ri on the i-th page P, and FIG. 20 is the last (m-th) page. 5 is an explanatory diagram showing trimming areas Qm and Rm on a page P. FIG.
The corners of the trimming region Q1 on the left page P are Qa (1), Qb (1), Qc (1), Qd (1), and the corners of the trimming region Qm are Qa (m), Qb (m ), Qc (m), Qd (m), and the corners of the trimming region Qi on the i-th page P are Qa (i), Qb (i), Qc (i), Qd (i), i The coordinate value of each corner of the trimming area Qi on the second page P is linearly interpolated using the coordinate value of each corner of the trimming area Q1, the coordinate value of each corner of the trimming area Qm, and the page number. It calculates | requires by the following formula | equation (9)-(12).

Qa (i) = Qa (1). {(Mi) / (m-1)} + Qa (m). {I / (m-1)} (9)
Qb (i) = Qb (1). {(Mi) / (m-1)} + Qb (m). {I / (m-1)} (10)
Qc (i) = Qc (1). {(Mi) / (m-1)} + Qc (m). {I / (m-1)} (11)
Qd (i) = Qd (1). {(Mi) / (m-1)} + Qd (m). {I / (m-1)} (12)

  On the other hand, the corners of the trimming region R1 of the right page P are Ra (1), Rb (1), Rc (1), Rd (1), and the corners of the trimming region Rm are Ra (m), Rb. (M), Rc (m), Rd (m), and the corners of the trimming region Ri on the i-th page P are Ra (i), Rb (i), Rc (i), Rd (i). The coordinate value of each corner of the trimming region Ri on the i-th page P is linear using the coordinate value of each corner of the trimming region R1, the coordinate value of each corner of the trimming region Rm, and the page number. It calculates | requires by the following formula | equation (13)-(16) to interpolate.

Ra (i) = Ra (1). {(Mi) / (m-1)} + Ra (m). {I / (m-1)} (13)
Rb (i) = Rb (1). {(Mi) / (m-1)} + Rb (m). {I / (m-1)} (14)
Rc (i) = Rc (1). {(Mi) / (m-1)} + Rc (m). {I / (m-1)} (15)
Rd (i) = Rd (1). {(Mi) / (m-1)} + Rd (m). {I / (m-1)} (16)
In addition, the coordinate value of each corner | angular part is calculated | required by substituting separately to said Formula (9)-(16) for both X coordinate value and Y coordinate value.

  By these equations, the second parameter of each page P, that is, the coordinate value of each corner of the trimming areas Qi and Ri is determined.

In step S6, the CPU 45 executes a deletion process.
FIG. 21 is a flowchart showing the flow of deletion processing.
In step S <b> 61, the CPU 45 reads the reference image G of the i-th page from the recording unit 41.
In step S62, the CPU 45 determines the predetermined areas Ki and Li of the reference image G of the i-th page by the above formulas (1) to (8).
FIG. 22 is an explanatory diagram showing a state in which predetermined areas Ki and Li are designated for the reference image G.
Then, the CPU 45 detects the color to be deleted designated in step S3 from the predetermined areas Ki and Li.
FIG. 23 is a schematic diagram showing a detection area of a color to be deleted (for example, skin color) detected in the predetermined area Ki. In the case of FIG. 23, there are two detection areas U1, U2 in the predetermined area Ki, and the detection area U1 has a larger area.

In step S63, the CPU 45 specifies the largest deletion target color cluster (detection area U1 in the case of FIG. 23) in the predetermined areas Ki, Li as the finger portion.
In step S64, the CPU 45 replaces the part specified as the finger part with the background color (page color, gray close to white, ivory close to white, etc.) designated in step S3.
FIG. 24 is an explanatory diagram showing the reference image G after the finger portions in the predetermined areas Ki and Li are replaced with the background color.
In step S65, the CPU 45 stores the replaced reference image G as a finger deletion image in the recording unit 41, and proceeds to step S7.
Thus, in the deletion process, the CPU 45 corrects the reference image G by deleting at least part of the predetermined areas Ki and Li based on the first parameter. That is, the CPU 45 is a correcting unit and a deleting unit according to the present invention.

As shown in FIG. 8, in step S7, the CPU 45 executes a cutting process.
FIG. 25 is a flowchart showing the flow of the cutting process.
In step S71, the CPU 45 reads the finger deletion image G1 (see FIG. 26) of the i-th page from the recording unit 41.
In step S72, the CPU 45 determines the trimming areas Qi and Ri of the finger deletion image G1 of the i-th page according to the above formulas (9) to (16).
FIG. 26 is an explanatory diagram showing a state in which the trimming areas Qi and Ri are designated for the finger deletion image G1.
Then, the CPU 45 cuts out the trimming areas Qi and Ri from the finger deletion image G1. That is, the CPU 45 is a cutting means according to the present invention.

  In step S <b> 73, the CPU 45 numbers the first image in the page order as 2 × i−1 pages and the subsequent image as 2 × i pages among the two cut out images. In the case of the present embodiment, since the left-open book B is a subject to be photographed, the left image (trimming area Qi) is the first image in the page order, and the right image (trimming area Ri) is the image after the page order. It becomes. The opposite is true when the right-open book is the subject of photography.

  In step S74, the CPU 45 associates the numbered page numbers with the cut-out images, stores them in the recording unit 41 as trimming images, and proceeds to step S8.

  As shown in FIG. 8, in step S8, the CPU 45 determines whether or not the i value is the last page number (m). If it is determined that the i value is different, the process proceeds to step S5. Ends the image processing mode.

  As described above, according to the present embodiment, based on the first parameter relating to the predetermined areas K and L on the page P at the beginning of turning and the first parameter relating to the predetermined areas K and L on the page P at the end of turning, Since the first parameter for any page P is determined, the first parameter for all pages P is automatically set without manually setting the first parameters for all pages P individually. Become. Thus, when the predetermined areas K and L of an arbitrary page P are set based on the first parameter, the predetermined areas K and L including the fingers h1 and h2 are automatically and optimally set for all the pages P. can do. Since at least a part of the predetermined areas K and L in all the pages P is automatically deleted, it is possible to improve the efficiency of deleting the fingers h1 and h2 (predetermined parts) in a large number of read images.

  In addition, since the deletion target colors corresponding to the fingers h1 and h2 are designated in advance, the area to be deleted is determined based on the deletion target colors. Therefore, the deletion area can be easily detected, and the processing can be performed lightly and at high speed.

  In addition, since the background color is designated in advance, the appearance of the processed image can be improved by simply replacing the background color with the deleted area. If the background color is designated in advance, the background color can be easily selected, and the processing can be lightened and speeded up.

  Based on the second parameter related to the trimming areas Q and R on the first page P and the second parameter related to the trimming areas Q and R on the last page P, the second parameter on an arbitrary page P is determined. Therefore, even if the second parameters for all the pages P are not manually set individually, the second parameters for all the pages P are automatically set. Since all the pages P are cut out based on the trimming areas Q and R, it is possible to capture images that are aligned for each page P.

In addition, when the clipping process is performed before the deletion process, a predetermined area is set so as to surround the finger part in the clipped image, but most of the unnecessary parts are already removed. For this reason, the finger portion remaining in the image is small, and its position and size vary greatly from page to page. When the variation is large, the certainty of the above-described deletion process becomes unstable.
However, if the clipping process is performed after the deletion process as described above, the variation of the fingers h1 and h2 for each page can be suppressed, so that the reliability of the deletion process for the fingers h1 and h2 can be improved.

  In addition, since linear interpolation is used as an interpolation method for the first parameter and the second parameter, the first parameter and the second parameter of each page P can be interpolated with a simple calculation. Therefore, it is possible to reduce the processing of the personal computer 4 related to the interpolation. It should be noted that a more advanced interpolation method can be used if accuracy is required.

  Further, since the mounting table 3 on which the book B is mounted is provided, it is possible to turn the page stably and to hold the opened page P stably.

  Further, since the mark 34 serving as a reference for the position of the finger for pressing the page is provided on the mounting table 3, the finger can be placed at substantially the same position for any page P by using the mark 34 as a reference. It becomes possible. If the position of the finger is stabilized in this way, the accuracy of the deletion process will also increase.

Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the present embodiment, the case where the largest deletion target color block in the predetermined area Ki, Li is specified as a finger and the part is replaced with the background color has been described as an example. However, in the predetermined area Ki, Li, It is also possible to replace all the color portions to be deleted with the background color.

  In the above embodiment, the case where the user designates the trimming areas Q1, R1, Qm, and Rm by operating the operation means 42 is illustrated. However, the first page P and the last page are specified by the personal computer 4. By performing well-known image processing for each reference image G of P, it is possible to extract the boundary between the document area and the margin and specify the trimming areas Q1, R1, Qm, Rm from the extraction result. It is. The personal computer 4 designates the second parameter at the start of turning of the page P from the trimming areas Q1 and R1 specified from the reference image G of the first page P. On the other hand, the personal computer 4 designates the second parameter at the end of turning of the page P from the trimming areas Qm and Rm designated from the reference image G of the last page P. This makes it possible to automatically specify parameters.

When parameters are automatically specified, there may be a case where a specification result that is undesirable for the user is obtained. For this reason, the personal computer 4 displays the trimming areas Q1, R1, Qm, and Rm on the screen after specifying the trimming areas Q1, R1, Qm, and Rm by image processing, so that the trimming area Q1 is displayed. , R1, Qm, and Rm are inquired to the user. The user inputs pass / fail by operating the operation means 42. The personal computer 4 designates the second parameter based on the trimming areas Q1, R1, Qm, and Rm by image processing when the response result of the user input through the operation means 42 is “good”. On the other hand, when the response result of the user input through the operation means 42 is “No”, the personal computer 4 adjusts the trimming areas Q1, R1, Qm, and Rm by image processing and performs trimming after the adjustment. The second parameter is designated based on the areas Q1, R1, Qm, and Rm.
As a method for adjusting the trimming areas Q1, R1, Qm, and Rm, for example, a method in which image processing is performed under different conditions and the trimming areas Q1, R1, Qm, and Rm are specified again, or the user operates the operation unit 42. And a method of finely adjusting the trimming areas Q1, R1, Qm, and Rm on the screen.

In the above embodiment, the case where the first parameter and the second parameter are determined at the start time of turning the page P and the end time of turning the page P has been described as an example. An allowable range may be given. That is, the personal computer 4 selects a page P suitable for parameter determination from a plurality of pages P near the beginning of turning of the page P, and determines the first parameter and the second parameter for the selected page P. Similarly, the personal computer 4 selects a page P suitable for parameter determination from a plurality of pages P near the end of turning of the page P, and determines a first parameter and a second parameter for the selected page P. Thereby, the accuracy of parameter determination can be improved.
For example, the page at the beginning or end of turning may not include characters or images in the trimming areas Q1, R1, Qm, and Rm. In this case, there is a high possibility that accurate parameters are not determined. However, if the parameter determination page P is selected from a plurality of pages P as described above, there is a high possibility that characters are included in the trimming areas Q1, R1, Qm, and Rm. Increases accuracy.
As a specific process, the personal computer 4 determines whether or not an area including characters exists in each page P that is a parameter determination candidate, and the existing page P is determined as a parameter determination page. Select as P. At this time, the page P in which the area including characters is located in the optimum area (range) for parameter determination is preferentially selected. Thereby, it is possible to further improve the accuracy of parameter determination.
It goes without saying that the parameters of not only the page P between the page P near the start of turning and the page P near the end of turning but also the page outside the same can be determined using the same formula as the above-described interpolation formula.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
An image reading device that turns a book page by page, images the page of the book for each page by an imaging means, corrects and captures a predetermined area of the captured image,
Initial parameter designating means for designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter specifying means for specifying a first parameter relating to the predetermined area in a page near the end of turning of the page;
Determining means for determining the first parameter in an arbitrary page based on the first parameter specified by the initial parameter specifying means and the final parameter specifying means;
Correction means for correcting the image of the arbitrary page based on the first parameter of the arbitrary page determined by the determination means,
The image reading apparatus according to claim 1, wherein the correcting unit includes a deleting unit that deletes at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page.
<Claim 2>
The image reading apparatus according to claim 1,
The deleting means includes first specifying means for specifying a color to be deleted from within the predetermined area,
The image reading apparatus, wherein the deletion unit deletes the deletion target color designated by the first designation unit from the predetermined area.
<Claim 3>
The image reading apparatus according to claim 2.
The deleting means includes second specifying means for specifying a background color from within the predetermined area,
The image reading apparatus according to claim 1, wherein the deleting unit replaces the deletion target color with the background color specified by the second specifying unit.
<Claim 4>
In the image reading device according to any one of claims 1 to 3,
The initial parameter designating means designates a second parameter related to a trimming region cut out from the captured image from a page near the start of turning the page,
The end parameter specifying means specifies the second parameter from a page near the end of turning the page,
The determining means determines the second parameter in an arbitrary page based on the second parameter specified by the initial parameter specifying means and the end parameter specifying means,
The image reading apparatus according to claim 1, wherein the correction unit includes a cutting unit that cuts out the trimming region as a trimming image based on the second parameter of the arbitrary page from the captured image.
<Claim 5>
The image reading apparatus according to claim 4.
The image reading apparatus according to claim 1, wherein the correction unit executes a cutting process by the cutting unit after a deleting process by the deleting unit.
<Claim 6>
In the image reading device according to any one of claims 1 to 5,
The determining means includes
Determining the parameter in the arbitrary page by performing linear interpolation using the parameter specified by the initial parameter specifying means, the parameter specified by the final parameter specifying means, and a page number; An image reading apparatus characterized by the above.
<Claim 7>
In the image reading apparatus according to any one of claims 1 to 6,
An image reading apparatus comprising a mounting table on which the book is mounted below the imaging means.
<Claim 8>
The image reading apparatus according to claim 7.
The image reading apparatus according to claim 1, wherein the placement table is provided with a mark serving as a reference of a finger position for pressing the page.
<Claim 9>
An image reading method in which a book is turned page by page, a page of the book is imaged for each page by an imaging means, and a predetermined area is corrected and captured.
An initial parameter designating step of designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter designating step of designating a first parameter relating to the predetermined area on a page near the end of turning of the page;
A determination step of determining the first parameter at an arbitrary page based on the first parameter specified by the initial parameter specifying step and the final parameter specifying step;
A correction step of correcting an image of the arbitrary page based on the first parameter of the arbitrary page determined in the determination step,
The image reading method according to claim 1, wherein the correcting step includes a deleting step of deleting at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page.
<Claim 10>
A computer that captures a page of a book that has been turned page by page by the image capturing unit and corrects and captures a predetermined area of the captured image.
Initial parameter designating means for designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter specifying means for specifying a first parameter relating to the predetermined area in a page near the end of turning of the page;
Determining means for determining the first parameter in an arbitrary page based on the first parameter specified by the initial parameter specifying means and the final parameter specifying means;
Based on the first parameter of the arbitrary page determined by the determination means, function as a correction means for correcting the image of the arbitrary page,
The correction unit includes a deletion unit that deletes at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page.

1. Document camera system (image reading device)
2. Document camera (imaging means)
DESCRIPTION OF SYMBOLS 3 Mounting stand 4 Personal computer 21 Stand part 22 Camera 31 Holding plate 32 Holding plate 33 Holding part 34 Mark 41 Recording part 42 Operating means 43 ROM
44 RAM
45 CPU (initial parameter designation means, final parameter designation means, determination means, correction means, deletion means, first designation means, second designation means, extraction means)
B book G reference image G1 finger deletion image K, L predetermined area P page Q, R trimming area U1, U2 detection area

Claims (10)

An image reading device that turns a book page by page, images the page of the book for each page by an imaging means, corrects and captures a predetermined area of the captured image,
Initial parameter designating means for designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter specifying means for specifying a first parameter relating to the predetermined area in a page near the end of turning of the page;
Determining means for determining the first parameter in an arbitrary page based on the first parameter specified by the initial parameter specifying means and the final parameter specifying means;
Correction means for correcting the image of the arbitrary page based on the first parameter of the arbitrary page determined by the determination means,
The image reading apparatus according to claim 1, wherein the correcting unit includes a deleting unit that deletes at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page. The image reading apparatus according to claim 1,
The deleting means includes first specifying means for specifying a color to be deleted from within the predetermined area,
The image reading apparatus, wherein the deletion unit deletes the deletion target color designated by the first designation unit from the predetermined area. The image reading apparatus according to claim 2.
The deleting means includes second specifying means for specifying a background color from within the predetermined area,
The image reading apparatus according to claim 1, wherein the deleting unit replaces the deletion target color with the background color specified by the second specifying unit. In the image reading device according to any one of claims 1 to 3,
The initial parameter designating means designates a second parameter related to a trimming region cut out from the captured image from a page near the start of turning the page,
The end parameter specifying means specifies the second parameter from a page near the end of turning the page,
The determining means determines the second parameter in an arbitrary page based on the second parameter specified by the initial parameter specifying means and the end parameter specifying means,
The image reading apparatus according to claim 1, wherein the correction unit includes a cutting unit that cuts out the trimming region as a trimming image based on the second parameter of the arbitrary page from the captured image. The image reading apparatus according to claim 4.
The image reading apparatus according to claim 1, wherein the correction unit executes a cutting process by the cutting unit after a deleting process by the deleting unit. In the image reading device according to any one of claims 1 to 5,
The determining means includes
Determining the parameter on the arbitrary page by performing linear interpolation using the parameter specified by the initial parameter specifying means, the parameter specified by the final parameter specifying means, and a page number; An image reading apparatus characterized by the above. In the image reading apparatus according to any one of claims 1 to 6,
An image reading apparatus comprising a mounting table on which the book is mounted below the imaging means. The image reading apparatus according to claim 7.
The image reading apparatus according to claim 1, wherein the placement table is provided with a mark serving as a reference of a finger position for pressing the page. An image reading method in which a book is turned page by page, a page of the book is imaged for each page by an imaging means, and a predetermined area is corrected and captured.
An initial parameter designating step of designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter designating step of designating a first parameter relating to the predetermined area on a page near the end of turning of the page;
A determination step of determining the first parameter at an arbitrary page based on the first parameter specified by the initial parameter specifying step and the final parameter specifying step;
A correction step of correcting an image of the arbitrary page based on the first parameter of the arbitrary page determined in the determination step,
The image reading method according to claim 1, wherein the correcting step includes a deleting step of deleting at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page. A computer that captures a page of a book that has been turned page by page by the image capturing unit and corrects and captures a predetermined area of the captured image.
Initial parameter designating means for designating a first parameter related to the predetermined area in a page near the beginning of turning the page;
An end parameter specifying means for specifying a first parameter relating to the predetermined area in a page near the end of turning of the page;
Determining means for determining the first parameter in an arbitrary page based on the first parameter specified by the initial parameter specifying means and the final parameter specifying means;
Based on the first parameter of the arbitrary page determined by the determination means, function as a correction means for correcting the image of the arbitrary page,
The correction unit includes a deletion unit that deletes at least a part of the predetermined area of the arbitrary page based on a first parameter of the arbitrary page.

Images