JP2013122641A - Image display system, portable terminal device, control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display system, a portable terminal device, a control method, and a control program capable of displaying an image with a portion of the image hidden easily and correctly.SOLUTION: A control unit of an image display system detects correction symbols 27 in image information on a notebook sheet 21 obtained by an imaging unit 5, adjusts vertical and horizontal positions by correcting the image information on the notebook sheet 21 on the basis of the detected correction symbols 27, detects a vertical masking mark 11a and a horizontal masking mark 11b in the image information on the notebook sheet 21, defines a vertical border line 13a extending in the vertical direction of the image information and a horizontal border line 13b extending in the horizontal direction on the basis of the detected vertical masking mark 11a and horizontal masking mark 11b, defines a masking area 14 for the image information on the basis of the vertical border line 13a and horizontal border line 13b, displays the corrected image information on the notebook sheet 21 on a display unit 6, displays a masking image 15 in the masking area 14, and cancels the display of the masking image 15 in response to a touch to a touch panel 7.

Description

  The present invention relates to an image display system that displays an image of a captured image. The present invention also relates to a portable terminal device, a control method, and a control program for the image display system.

  With recent development of information processing technology, for example, various things are imaged by a mobile terminal device such as a mobile phone or a smartphone, and for example, paper such as a document or a notebook is also imaged. Yes. Moreover, the image of what was imaged is displayed on the image display part of a portable terminal device, and a user may see the image. (For example, see Patent Document 1)

JP 2011-066660 A

  As described above, when something is imaged and the image is displayed on the image display unit, it is usually configured to display all the captured images. However, there has been a conventional request to display an image partially hidden without displaying everything.

  The present invention has been made to solve the above-described problem, and when displaying an image, an image display system, a portable terminal device, a control method, and an image display system capable of easily and accurately concealing and displaying a part thereof And it aims at provision of a control program.

  The present invention is an image display system for solving the above-described problem, and includes a sheet on which a correction symbol is displayed, and a portable terminal device that processes image information on the sheet, and the portable terminal device includes: An imaging unit capable of imaging a sheet; a display unit capable of displaying image information of the sheet imaged by the imaging unit; a touch panel disposed on the display unit; and a control unit. A vertical masking mark and a horizontal masking mark for defining a masking area are displayed, and the control unit detects the correction symbol in the image information of the paper imaged by the imaging unit, and the detected correction symbol The image information of the paper is corrected based on the image to adjust the vertical and horizontal directions, and the vertical masking mark and the horizontal masking mark in the image information of the paper are detected. Based on the vertical masking mark and the horizontal masking mark, a vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information are respectively defined, and based on the vertical boundary line and the horizontal boundary line, Defining a masking area for image information, displaying the corrected image information of the paper on the display unit, displaying a masking image on the masking area, and hiding the masking image based on a touch on the touch panel; An image display system.

  According to such a configuration, a masking area can be defined from the vertical masking mark and the horizontal masking mark, the masking area can be masked by the masking image, and the masking image can be hidden by touching the touch panel. When displaying an image of a notebook paper, a part thereof can be easily and accurately hidden and displayed. Further, the portion hidden by the masking image can be easily displayed by touching the touch panel. Further, since the masking region is defined based on the vertical boundary line and the horizontal boundary line, the region can be clearly defined.

  In the above image display system, it is preferable that the vertical masking mark and the horizontal masking mark are displayed by user entry.

  Alternatively, in the above image display system, it is preferable that the vertical masking mark and the horizontal masking mark are displayed in advance on the paper.

  Alternatively, the present invention has been made to solve the above-described problem, and is a mobile terminal device that processes image information of a sheet on which a correction symbol is displayed, the imaging unit capable of capturing the sheet, A vertical masking for defining a masking area on the paper, comprising: a display unit capable of displaying image information of the paper imaged by the imaging unit; a touch panel disposed on the display unit; and a control unit. Mark and a horizontal masking mark are displayed, and the control unit detects the correction symbol in the image information of the sheet imaged by the imaging unit, and corrects the image information of the sheet based on the detected correction symbol. The vertical masking mark and the horizontal masking mark are detected in the image information of the paper, and the detected vertical masking mark and the detected vertical masking mark are detected. A vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information are respectively defined based on the masking mark for use, and a masking region for the image information is defined based on the vertical boundary line and the horizontal boundary line. Even if the portable terminal device displays the corrected image information of the paper on the display unit, displays the masking image in the masking area, and hides the masking image based on the touch of the touch panel. Good.

  Alternatively, the present invention has been made to solve the above-described problem, and controls to control an image display system including a sheet on which a correction symbol is displayed and a portable terminal device that processes image information on the sheet. In the method, the mobile terminal device includes an imaging unit capable of imaging the paper, a display unit capable of displaying image information of the paper imaged by the imaging unit, and a touch panel disposed on the display unit A vertical masking mark and a horizontal masking mark for defining a masking area on the paper, and the control unit in the image information of the paper imaged by the imaging unit. Detecting the correction symbol, correcting the image information of the paper based on the detected correction symbol, and adjusting the vertical and horizontal directions; and the vertical mass in the image information of the paper Detecting a scanning mark and a horizontal masking mark, and a vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information based on the detected vertical masking mark and horizontal masking mark, respectively. Defining the masking area for the image information based on the vertical boundary line and the horizontal boundary line, displaying the corrected image information of the paper on the display unit, and the masking area. The control method may execute a step of displaying a masking image and a step of hiding the masking image based on a touch on the touch panel.

  Alternatively, the present invention has been made to solve the above-described problem, and controls to control an image display system including a sheet on which a correction symbol is displayed and a portable terminal device that processes image information on the sheet. The portable terminal device includes an imaging unit capable of imaging the paper, a display unit capable of displaying image information of the paper imaged by the imaging unit, and a touch panel disposed on the display unit A vertical masking mark and a horizontal masking mark for defining a masking area on the paper, and the control unit in the image information of the paper imaged by the imaging unit. Detecting the correction symbol, correcting the image information of the paper based on the detected correction symbol, and adjusting the vertical and horizontal directions; and the vertical and horizontal in the image information of the paper A step of detecting a masking mark and the horizontal masking mark, and a vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information based on the detected vertical masking mark and horizontal masking mark. Defining each of the image information based on the vertical boundary line and the horizontal boundary line, displaying the corrected image information of the paper on the display unit, and the masking area A control program for executing a step of displaying a masking image on the screen and a step of non-displaying the masking image based on a touch on the touch panel.

  According to the image display system, the portable terminal device, the control method, and the control program of the present invention, when an image is displayed, a part of the image can be easily and accurately hidden and displayed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the image display system which concerns on one Embodiment of this invention, (a) is a top view of a notebook, (b) is a front view of a portable terminal device, (c) is a portable terminal device. It is a back view. It is a figure which shows the note paper inside a notebook. It is a block diagram of a portable terminal device. It is a flowchart of the control method of an image display system. It is a flowchart of the correction process which concerns on the image information of a note paper. It is a figure which shows an example of a display of the image information of the note paper in a display part. It is a figure which shows an example of the display of the masking image in a display part. It is a figure which shows the note paper which concerns on other embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an image display system according to an embodiment of the present invention, (a) is a plan view of a notebook, (b) is a front view of a mobile terminal device, and (c) is a front view. It is a reverse view of a portable terminal device. As shown in FIG. 1, the image display system 1 includes a notebook 2 and a mobile terminal device 3.

  First, note 2 will be described. FIG. 2 is a diagram showing the inside of the notebook. As shown in FIG. 2, the notebook 2 includes a notebook body 20 and a plurality of notebook papers 21 arranged inside the notebook body 20. The notebook body 20 is a member that covers the notebook paper 21 and is configured as a cover of the notebook 2.

  A plurality of mark entry sections 10 (vertical mark entry section 10a and horizontal mark entry section 10b) are displayed on the notebook sheet 21. The plurality of vertical mark entry portions 10 a are arranged side by side in the horizontal direction (x direction in FIG. 2) at an upper portion of the notebook paper 21, and the plurality of horizontal mark entry portions 10 b are arranged on the notebook paper 21. In the side part (right side), they are arranged side by side in the vertical direction (y direction in FIG. 2). The x direction and the y direction are orthogonal to each other. Each mark entry portion 10 (vertical mark entry portion 10a and horizontal mark entry portion 10b) is configured by a white rectangular frame line, and the masking mark 11 ( A vertical masking mark 11a and a horizontal masking mark 11b) can be entered. As a result, the rectangular masking mark 11 (vertical masking mark 11 a and horizontal masking mark 11 b) is displayed on the notebook paper 21. The vertical masking mark 11 a is a mark for defining a vertical boundary line 13 a of a masking area 14 described later, and the horizontal masking mark 11 b is a mark for defining a horizontal boundary line 13 b of the masking area 14. In addition, a plurality of correction symbols 27, 27... For correcting an image are displayed at the four corners of the notebook paper 21. Further, ruled lines and the like are appropriately displayed on the notebook paper 21, and the user can freely write in the notebook paper 21 with a writing tool.

  Next, the mobile terminal device 3 will be described. FIG. 3 is a block diagram of the mobile terminal device. As shown in FIGS. 1 and 3, the mobile terminal device 3 includes a device main body 4, an imaging unit 5, a display unit 6, a touch panel 7, a storage unit 8, and a control unit 9. In addition, the mobile terminal device 3 includes an antenna for wireless communication, a microphone and a speaker for voice calls, and the like (none of which are shown). Such a portable terminal device 1 is not particularly limited, and examples thereof include a smartphone, a mobile phone, and a PDA.

  As the apparatus main body 4, a known smartphone main body can be used, and a power switch and various buttons are provided. The imaging unit 5 is a known configuration that captures a subject image incident through a lens, and can capture the notebook paper 21. Such an imaging unit 5 includes, for example, an imaging device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) that outputs an analog electrical signal, and photoelectrically converts a subject image incident through the lens to capture the image. A device that converts an analog electric signal from the element into a digital electric signal and outputs image data can be used.

  As the display unit 6, a known display device such as a liquid crystal display or an organic EL display can be used, and image information or the like can be displayed on the display screen. The touch panel 7 is a known touch panel that can recognize the touch position when the user touches the surface, and is disposed on the display unit 6. As the touch panel 7, a known type such as a resistive film type, a surface acoustic wave type, an electromagnetic induction type, a capacitance type, or the like can be used. Further, various inputs can be made by the user touching the touch panel 7. For example, by touching the touch panel 7, an instruction for imaging by the imaging unit 5 and display on the display unit 6 can be input.

  The storage unit 8 is configured by a storage medium such as a known hard disk or semiconductor memory that stores programs and data for information processing. The storage unit 8 can store image information of the note paper 21 captured by the imaging unit 5. The image information is stored in a file format such as jpeg and gif, for example. The storage unit 8 stores a control program for controlling the image display system 1. In addition, the storage unit 8 can store various other information as appropriate.

  The control unit 9 includes a processor such as a known CPU that performs information processing based on programs and data. The control unit 9 can control each of the above components by executing a control program for the image display system stored in the storage unit 8. Details of the control of the image display system will be described below.

Next, a control method for controlling the image display system having the above configuration will be described. This control method is executed by a control program. FIG. 4 is a flowchart of the control method of the image display system. In this image display system 1, first, the user manually writes the masking marks 11 (vertical masking marks 11 a and horizontal masking marks 11 b) on the notebook paper 21 with a writing instrument. More specifically, the user enters the vertical masking mark 11a and the horizontal masking mark 11b by painting the vertical mark writing part 10a and the horizontal mark writing part 10b. The positions for entering the vertical masking mark 11a and the horizontal masking mark 11b are not particularly limited. In the example shown in FIG. 2, two vertical mark entry portions 10a on the right side and three upper horizontal mark entries are entered. The vertical masking mark 11a and the horizontal masking mark 11b are filled in by filling the portion 10b. As a result, the rectangular vertical masking mark 11 a and the horizontal masking mark 11 b are displayed on the notebook paper 21. (Step S1)
Further, the user can freely write in the notebook paper 21 with a writing instrument. For example, in the example shown in FIG. 2, a Japanese word and an English word translated from it are entered on the notebook paper 21.

  Further, the user enters the masking mark 11 on the notebook paper 21 and then images the notebook paper 21 by the imaging unit 5 of the mobile terminal device 3 (step S2). When the notebook paper 21 is imaged, the correction symbols 27 displayed at the four corners of the notebook paper 21 are set in the imaging range.

  When the user images the note paper 21 with the imaging unit 5, the control unit 9 corrects the image information of the imaged note paper 21 (step S3). Here, an example of image information correction processing will be described. FIG. 5 is a flowchart of the correction process related to the image information of the notebook paper. As shown in FIG. 5, when correcting the image information of the notebook paper 21, the image information of the captured notebook paper 21 is reduced, the image information is converted into a gray scale, and this is further binarized and binarized. A correction symbol 27 is detected from the image information (steps S311 and S312). Subsequently, the four corners of the notebook paper 21 are determined based on the detected correction symbol 27, and when the image is distorted, the image information is trapezoidally corrected by perspective projection conversion (step S313). The perspective projection conversion is a known correction process for projecting the image information of the captured note paper 21 onto a two-dimensional projection plane corresponding to the screen of the display unit 6. Thereby, the vertical and horizontal directions of the image information on the notebook paper 21 are adjusted, and a plan view thereof can be obtained. In addition, the control unit 9 adjusts the image quality of the image information on the notebook paper 21 (step S314). When adjusting the image quality, the histogram of the image information can be made uniform and gamma correction can be performed. Further, unnecessary portions of the image are trimmed to adjust the image size (step S315). As described above, the image information of the note paper 21 is corrected. Further, the control unit 9 stores the corrected image information of the note paper 21 in the storage unit 8.

  Next, the controller 9 detects the vertical masking mark 11a and the horizontal masking mark 11b (step S4). More specifically, the control unit 9 first cuts out the upper and side (right side) image portions of the note paper 21 from the image information of the note paper 21, binarizes the cut image portion, and binarizes the image portion. A rectangular mark is detected from. Thereby, a plurality of marks are detected. Next, the control unit 9 calculates the area of each detected mark for each of the upper and side image portions, and when the calculated area is larger than a preset maximum area, or the calculated area is If it is smaller than the preset minimum area, the mark is omitted. In addition, the control unit 9 calculates the vertical width of the detected mark, and when the calculated vertical width is larger than the preset maximum vertical width, or the calculated vertical width is larger than the preset minimum vertical width. If it is smaller, omit the mark. Further, the control unit 9 performs the same processing as the above-described case of the detected mark width. This eliminates the detected marks that are not the vertical masking mark 11a and the horizontal masking mark 11b. In this way, the vertical masking mark 11 a on the top of the notebook paper 21 and the horizontal masking mark 11 b on the side of the notebook paper 21 can be detected from the image information of the notebook paper 21. The detection method of the masking mark 11 is not limited to this configuration, and any detection method may be used as long as the vertical masking mark 11a and the horizontal masking mark 11b can be detected. Further, from the viewpoint of accurately detecting the masking mark 11, it is preferable to predetermine the paper size of the notebook paper 21 and the display range of the masking mark 11 according to the standard.

  FIG. 6 is a diagram illustrating an example of display of image information of notebook paper on the display unit. After detecting the masking mark 11 in the image information of the notebook paper 21 as described above, the control unit 9, as shown in FIG. 6, based on the detected vertical masking mark 11 a and horizontal masking mark 11 b, respectively. A vertical boundary line 13a and a horizontal boundary line 13b of the masking region 14 are defined. More specifically, a vertical boundary line 13a extending from the vertical masking mark 11a in the vertical direction (y direction in FIG. 6) of the image information of the notebook paper 21 is defined. Further, a horizontal boundary line 13b extending from the horizontal masking mark 11b in the horizontal direction (x direction in FIG. 6) of the image information of the notebook paper 21 is defined. (Step S5) The vertical boundary line 13a and the horizontal boundary line 13b may be displayed on the display unit 6 or may not be displayed on the display unit 6 as virtual lines.

  Next, the control part 9 demarcates the masking area | region 14 based on the vertical boundary line 13a and the horizontal boundary line 13b (step S6). More specifically, in the present embodiment shown in FIG. 6, a region surrounded by the vertical boundary line 13a and the horizontal boundary line 13b is defined as a masking region 14, and twelve masking regions 14 are defined. Become. Thus, a plurality of masking areas 14 are defined so as to cover the entire image information of the notebook paper 21, and each masking area 14 is defined so as to cover a part of the image information of the notebook paper 21.

Next, the control unit 9 displays the image information of the notebook paper 21 on the display unit 6. More specifically, when the user selects image information to be displayed on the display unit 6 by touching the touch panel 7, the control unit 9 calls the image information of the selected note paper 21 from the storage unit 8, and displays the display unit. 6 is displayed. (Step S7)
Next, the control unit 9 masks the masking area 14 by displaying a masking image 15 in the masking area 14. FIG. 7 is a diagram illustrating an example of the display of the masking image on the display unit. As shown in FIG. 7, when the user selects a masking area 14 to be masked and touches the touch panel 7 in the masking area 14, the control unit 9 masks the image information on the notebook paper 21 in the masking area 14. The image 15 is displayed superimposed. In the example shown in FIG. 7, an image filled in black is displayed as the masking image 15 on the image information of the note paper 21 in the masking area 14. In the example shown in FIG. 7, the user touches the touch panel 7 in the right three masking areas 14 to mask each masking area 14. Thereby, the image information of the note paper 21 in the masking area 14 is obscured. (Step S8)
Next, when the user touches the touch panel 7 in the masking area 14 with the masking image 15 displayed in the masking area 14, the control unit 9 cancels the display of the masking image 15 in the touched masking area 14. Hide (step S9). Thereby, the image of the note paper 21 below the masking image is displayed. For example, in the example shown in FIG. 7, the masking image 15 in the masking area 14 is hidden in the portion where the Japanese word is displayed, and the image of the note paper 21 on which the Japanese word is displayed is visible to the user. It is in a state.

  When the user touches the touch panel 7 in the masking area 14 in a state where the masking image 15 is not displayed in the masking area 14 and the image of the notebook paper 21 is visible to the user, the control unit 9 again enters the masking area 14. Display the masking image. In this way, the display / non-display of the masking image 15 can be switched by touching the touch panel 7 in the masking region 14.

  According to the image display system having the above-described configuration, the masking area 14 is demarcated from the vertical masking mark 11a and the horizontal masking mark 11b, the masking area 14 is masked by the masking image 15, and the touch panel 7 is touched. Since the masking can be released, a part of the notebook paper 21 can be easily and accurately hidden and displayed. In addition, an image hidden by masking can be easily displayed. Further, since the masking region 14 is defined based on the vertical boundary line 13a and the horizontal boundary line 13b, the region can be clearly defined. Further, the masking area 14 can be easily defined by writing the masking mark 11 on the notebook paper 21.

  Further, since the image information of the note paper 21 is corrected by the correction symbol 27, the image of the note paper 21 can be accurately displayed on the display unit 6, and the masking region 14 can be accurately defined.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment.

  For example, in the above-described embodiment, the masking mark 11 (vertical masking mark 11a and horizontal masking mark 11b) is displayed by user input. However, the present invention is not limited to this configuration. May be displayed. FIG. 8 is a plan view of a notebook paper according to another embodiment. 8, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIG. 8, a plurality of vertical masking marks 11a and horizontal masking marks 11b are displayed on the notebook paper 21 in advance. Based on the displayed vertical masking mark 11a and horizontal masking mark 11b, the control unit 9 of the mobile terminal device 3 defines the vertical boundary line 13a and the horizontal boundary line 13b in the same manner as described above. In the embodiment shown in FIG. 8, a plurality of masking regions 14 are defined over the entire note paper 21. According to such a configuration, since the user does not need to write the masking mark 11 on the notebook paper 21, the masking area 14 can be quickly defined.

  Further, the correction process of the image information on the note paper 21 is not limited to the embodiment shown in FIG. 5 described above, and a known correction process can be applied as appropriate. Further, the correction symbol displayed on the notebook paper 21 is not limited to the correction symbol 27 described above, and can be appropriately changed in design, and any correction symbol may be used. Even with correction symbols and correction processes other than those in the above embodiment, the image information of the notebook paper 21 can be arranged vertically and horizontally to obtain a plan view as shown in FIG.

  Moreover, in the said embodiment, although it was the image display system 1 which concerns on the note paper 21, it is not limited to this, The image display system which concerns on another paper may be sufficient. For example, by using an image display system related to a chart sheet, the image information on the chart sheet can be partially masked.

DESCRIPTION OF SYMBOLS 1 Image display system 2 Notebook 3 Portable terminal device 4 Apparatus main body 5 Imaging part 6 Display part 7 Touch panel 8 Storage part 9 Control part 10a Vertical mark entry part 10b Horizontal mark entry part 11a Vertical masking mark 11b Horizontal masking mark 13a Vertical boundary line 13b Horizontal boundary line 14 Masking area 15 Masking image 20 Notebook body 21 Notebook paper 27 Correction symbol

Claims (6)

A paper with a correction symbol displayed;
A portable terminal device for processing the image information of the paper,
The portable terminal device includes an imaging unit capable of imaging the paper, a display unit capable of displaying image information of the paper imaged by the imaging unit, a touch panel disposed on the display unit, and a control unit. With
A vertical masking mark and a horizontal masking mark for defining a masking area on the paper are displayed,
The controller is
Detecting the correction symbol in the image information of the paper imaged by the imaging unit;
Correcting the image information of the paper based on the detected correction symbol to adjust the vertical and horizontal directions,
Detecting the vertical masking mark and the horizontal masking mark in the image information of the paper;
A vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information are defined based on the detected vertical masking mark and the horizontal masking mark, respectively.
Defining a masking region for the image information based on the vertical boundary line and the horizontal boundary line;
The corrected image information of the paper is displayed on the display unit,
Displaying a masking image in the masking area;
An image display system for hiding the masking image based on a touch on the touch panel.   The image display system according to claim 1, wherein the vertical masking mark and the horizontal masking mark are displayed by entry by a user.   The image display system according to claim 1, wherein the vertical masking mark and the horizontal masking mark are displayed in advance on the paper. A portable terminal device that processes image information of a sheet on which a correction symbol is displayed,
An imaging unit capable of imaging the paper, a display unit capable of displaying image information of the paper imaged by the imaging unit, a touch panel disposed on the display unit, and a control unit,
A vertical masking mark and a horizontal masking mark for defining a masking area on the paper are displayed,
The controller is
Detecting the correction symbol in the image information of the paper imaged by the imaging unit;
Correcting the image information of the paper based on the detected correction symbol to adjust the vertical and horizontal directions,
Detecting the vertical masking mark and the horizontal masking mark in the image information of the paper;
A vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information are defined based on the detected vertical masking mark and the horizontal masking mark, respectively.
Defining a masking region for the image information based on the vertical boundary line and the horizontal boundary line;
The corrected image information of the paper is displayed on the display unit,
Displaying a masking image in the masking area;
A mobile terminal device that hides the masking image based on a touch on the touch panel. A control method for controlling an image display system comprising a sheet on which a correction symbol is displayed and a portable terminal device that processes image information on the sheet,
The portable terminal device includes an imaging unit capable of imaging the paper, a display unit capable of displaying image information of the paper imaged by the imaging unit, a touch panel disposed on the display unit, and a control unit. With
A vertical masking mark and a horizontal masking mark for defining a masking area on the paper are displayed,
The control unit is
Detecting the correction symbol in the image information of the paper imaged by the imaging unit;
Correcting the image information of the paper based on the detected correction symbol and adjusting the vertical and horizontal directions;
Detecting the vertical masking mark and the horizontal masking mark in the image information of the paper;
Defining a vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information based on the detected vertical masking mark and horizontal masking mark, respectively;
Defining a masking region for the image information based on the vertical boundary line and the horizontal boundary line;
Displaying the corrected image information of the paper on the display unit;
Displaying a masking image in the masking region;
And non-displaying the masking image based on a touch on the touch panel. A control program for controlling an image display system comprising a sheet on which a correction symbol is displayed and a portable terminal device that processes image information on the sheet,
The portable terminal device includes an imaging unit capable of imaging the paper, a display unit capable of displaying image information of the paper imaged by the imaging unit, a touch panel disposed on the display unit, and a control unit. With
A vertical masking mark and a horizontal masking mark for defining a masking area on the paper are displayed,
The control unit is
Detecting the correction symbol in the image information of the paper imaged by the imaging unit;
Correcting the image information of the paper based on the detected correction symbol and adjusting the vertical and horizontal directions;
Detecting the vertical masking mark and the horizontal masking mark in the image information of the paper;
Defining a vertical boundary line extending in the vertical direction and a horizontal boundary line extending in the horizontal direction of the image information based on the detected vertical masking mark and horizontal masking mark, respectively;
Defining a masking region for the image information based on the vertical boundary line and the horizontal boundary line;
Displaying the corrected image information of the paper on the display unit;
Displaying a masking image in the masking region;
And a step of hiding the masking image based on a touch on the touch panel.

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