JP2016212044A - Pointer value reading device and pointer value reading program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly read a pointer value of an indicator without being influenced by imaging conditions.SOLUTION: A pointer value reading device 1 for reading a pointer value indicated by a pointer of an indicator 2 from a captured image of the indicator 2 captured by imaging means 10, comprises: position information acquisition means 44 by which an origin position of a scale M of the indicator 2 displayed by display means 20, a maximum point position, a rotation center point position of the pointer, and a pointer point position indicated by the pointer are acquired on the basis of a selection operation through a user; and pointer value calculation means 45 for calculating a ratio between a virtual first rotation angle of the pointer from a coordinate at the origin position with a coordinate of the rotation center point position as a center to a coordinate at the maximum point position and a second rotation angle of the pointer from the coordinate at the origin position with the coordinate of the rotation center point position as a center to a coordinate at the pointer point position, and calculating the pointer value from the maximum value of the scale M acquired by storage means.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pointer value reading device and a pointer value reading program.

  For example, concrete quality tests and soil quality tests are performed at construction sites, and the work of preparing documents for these tests is a heavy burden on construction personnel.

2. Description of the Related Art Conventionally, a technique for automatically reading a pointer value from an image taken by a meter used in a quality test or the like using an image recognition technique has been developed (see Patent Documents 1 and 2).
If this technique is used, the measurement result can be automatically converted into data, and the document creation work can be reduced.

Japanese Patent Laid-Open No. 3-100424 Japanese Patent No. 3998215

  However, the apparatus using the techniques described in Patent Documents 1 and 2 may not be able to correctly read the indicator value of the instrument. For example, in outdoor construction sites, the shooting conditions are not constant, unlike indoors, and the guideline values may not be accurately read depending on the shooting conditions.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pointer value reading device and a pointer value reading program capable of accurately reading a pointer value of a meter without being influenced by photographing conditions. .

  In order to solve the above-mentioned problem, a pointer value reading device according to the present invention is a pointer value reading device that reads a pointer value indicated by a pointer of a meter from a photographed image of the meter photographed by photographing means, and has two-dimensional coordinates. The photographed image display means for displaying the photographed image on the set display means, the origin position of the scale of the instrument displayed on the display means, the maximum point position, the rotation center point position of the pointer, and the pointer indicate Position information acquisition means for acquiring a pointer point position based on a user's selection operation, and a virtual position of the pointer from the origin position coordinate to the maximum point position coordinate centered on the rotation center point position coordinate A ratio between the first rotation angle and the second rotation angle of the pointer from the coordinates of the origin position to the coordinates of the pointer point position centered on the coordinates of the rotation center point position, and from the storage means A guideline value calculating means for calculating the pointer value from the maximum value of the scale which is characterized in that it comprises a.

  In the pointer value reading device according to the present invention, the pointer value is calculated from the coordinates of the origin position of the scale selected by the user, the coordinates of the maximum point position, the coordinates of the rotation center point position, and the coordinates of the pointer point position. Therefore, it is possible to accurately read the pointer value of a meter (for example, a round meter) whose scale is arranged on an arc regardless of the state of the captured image. Note that if the graduation is placed endlessly and the origin of the graduation and the maximum point are at the same position, the user can specify the end points of the graduation (the origin and maximum point of the graduation), the rotation center point, and the pointer. There are cases where three points are selected. The user can also select the three points of the scale origin, the rotation center point, and the pointer point, and calculate the position of the maximum point from the positional relationship between the origin of the selected scale and the rotation center point.

  The pointer value reading device according to the present invention is a pointer value reading device that reads a pointer value indicated by a pointer of the instrument from a photographed image of the instrument photographed by the photographing means, and is a display in which two-dimensional coordinates are set. A photographed image display means for displaying the photographed image on the means, and an origin position, a maximum point position of the scale of the instrument displayed on the display means, and a pointer point position indicated by the pointer are acquired based on a user selection operation. Position information acquisition means, and a first virtual movement distance of the pointer from the coordinate of the origin position to the coordinate of the maximum point position and a position of the pointer from the coordinate of the origin position to the coordinate of the pointer point position And a pointer value calculating means for calculating the pointer value from a ratio to the second moving distance and a maximum value of the scale obtained from the storage means.

  In the pointer value reading device according to the present invention, the pointer value is calculated from the coordinates of the origin position of the scale selected by the user, the coordinates of the maximum point position, and the coordinates of the pointer point position. Therefore, it is possible to accurately read the pointer value of an instrument (for example, a scale) in which the scale is arranged on a straight line regardless of the state of the captured image.

  According to the present invention, it is possible to accurately read the pointer value of the instrument without being affected by the photographing conditions.

It is a block diagram of the pointer value reading device according to the first embodiment of the present invention. It is a screen example of a touch display, (a) shows a state when photographing an instrument, and (b) shows a state when a user (hereinafter referred to as an observer) inputs data by a touch operation. It is an example of the positional information input by the observer's touch operation. It is a figure for demonstrating the process which calculates the pointer value of a meter using the input positional information. It is an illustration of the flowchart which shows the flow of a process of the pointer value reading apparatus which concerns on 1st Embodiment of this invention. It is a block diagram of a pointer value reading device according to a second embodiment of the present invention. It is an example of a screen of a touch display, (a) shows the state at the time of imaging | photography of a meter, (b) shows the state at the time of an observer performing data input by touch operation. It is an example of the positional information input by the observer's touch operation. It is an illustration of the flowchart which shows the flow of a process of the pointer value reading apparatus which concerns on 2nd Embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.
Each figure is only schematically shown so that the invention can be fully understood. Therefore, the present invention is not limited to the illustrated example. In the drawings to be referred to, the dimensions of each member may be exaggerated for the sake of clarity. In addition, in each figure, about the same component or the same component, the same code | symbol is attached | subjected and those overlapping description is abbreviate | omitted.

[First Embodiment]
≪About the configuration of the guideline value reading device according to the first embodiment≫
With reference to FIG. 1, the structure of the pointer value reading apparatus 1 according to the first embodiment will be described. In the following, functions related to the present invention will be described, and descriptions of functions not related will be omitted. The pointer value reading device 1 reads a pointer value of an analog meter 2 having a pointer as a digital value. The pointer value reading device 1 here is assumed to be a portable tablet terminal, and includes a digital camera 10, a touch display 20, a storage unit 30, and a control unit 40. .

  The digital camera 10 incorporates a lens (not shown) and an image sensor (imaging device). The digital camera 10 refracts light emitted from a subject (in this case, the instrument 2) by the lens, and uses the image sensor to refract the refracted light. Convert to electrical signal. The digital camera 10 may be a CCD camera or a CMOS camera, for example, and outputs a photographed image Gn of a predetermined frame rate obtained by photographing the meter 2 to the control means 40. Here, the meter 2 to be photographed may be an analog type having a pointer, and its use and type are not particularly limited. In the present embodiment, a round analog meter is assumed as the meter 2. The meter 2 includes a scale plate 2a having a scale M on an arc, and a pointer 2b that is rotatably fixed to the center of the scale plate 2a. The tip of the pointer 2b points to an arbitrary position on the scale M.

  The touch display 20 is a liquid crystal display device in which a touch panel is laminated on the surface of a display. The touch display 20 is set with an orthogonal coordinate system (for example, the horizontal direction is the X axis and the vertical direction is the Y axis), and the position information selected by the touch operation is output as the coordinate value. can do. The contents displayed on the touch display 20 and the contents of data input by the observer's touch operation will be described later. The pointer value reading device 1 may include a display unit such as a display and an input unit such as a keyboard and a mouse as separate devices instead of the touch display 20.

  The storage unit 30 includes a storage medium such as a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), and a flash memory. The storage unit 30 includes a captured image storage unit 31, a scale information storage unit 32, and a pointer value information storage unit 33. The photographed image storage means 31 stores one photographed image G (still image) instructed by the observer from among photographed images Gn (moving images) of a predetermined frame rate photographed by the digital camera 10. This captured image G is used for calculation of the pointer value of the meter 2. The scale information storage means 32 stores the maximum value of the scale M of the meter 2 that is the subject of photographing. The pointer value information storage unit 33 stores the pointer value of the meter 2 calculated from the captured image G. The calculation method of the guideline value will be described later.

  The control means 40 is realized by a program execution process by a CPU (Central Processing Unit), a dedicated circuit, or the like. When the control means 40 is realized by a program execution process, the storage means 30 stores a program for realizing the function of the control means 40. The control means 40 includes a photographing assist means 41, a photographed image acquisition means 42, a photographed image display means 43, a position information acquisition means 44, and a pointer value calculation means 45. The photographing assist means 41 and the photographed image acquisition means 42 perform processing until the photographed image G is obtained, and the photographed image display means 43, the position information acquisition means 44, and the pointer value calculation means 45 include the photographed image. A process for calculating a guideline value from G is performed. Hereinafter, the contents of processing of each function will be described.

  The imaging assistance means 41 assists the imaging of the instrument 2 by the observer. The photographing assisting unit 41 acquires the photographed image Gn from the digital camera 10 and causes the touch display 20 to display the photographed image G (n + g) in which the acquired photographed image Gn is overlapped with a guide g that assists photographing with the instrument 2. The guide g may be any as long as the instrument 2 can be photographed from the front without tilting. In the present embodiment, as illustrated in FIG. 2A, the photographing assistance unit 41 displays a ring-shaped guide g on the center portion of the touch display 20. Note that the photographing assistance means 41 may display a cross-shaped guide (not shown) indicating the center position of the meter 2 or the like.

  The captured image acquisition unit 42 determines the captured image G used for calculating the pointer value. The captured image acquisition unit 42 acquires the captured image Gn from the imaging auxiliary unit 41 and inputs an imaging instruction from the observer via the touch display 20. Any kind of shooting instruction may be used, and the type thereof is not particularly limited. The captured image acquisition unit 42 acquires, as a still image, a captured image G at the time when an imaging instruction is received from the observer from the captured image Gn, and stores the acquired captured image G in the captured image storage unit 31. The captured image G stored in the captured image storage unit 31 is used for the calculation of the pointer value thereafter.

  The captured image display unit 43 acquires the captured image G from the captured image storage unit 31 and displays the acquired captured image G on the touch display 20. Here, the captured image display means 43 may enlarge the captured image G and display it on the touch display 20.

  The position information acquisition unit 44 acquires position information (coordinates) of a point designated by an observer's selection operation (hereinafter referred to as touch operation). On the touch display 20, as shown in FIG. 2B, the captured image G of the instrument 2 is displayed by the captured image display means 43. In FIG.2 (b), the initial state (state before a measurement) of the pointer 2b is shown with the broken line. The pointer 2b indicates the origin M0 of the scale in the initial state. The observer sequentially selects a total of three points including the origin M0 of the meter 2 displayed as the captured image G, the rotation center point O of the pointer 2b, and the pointer point Mi of the pointer 2b. A mark is displayed at a selected place on the touch display 20. Here, it is assumed that the observer is informed beforehand of the position and order of selecting the captured image G by an operation manual or the like. In addition to displaying the captured image G, the position information acquisition unit 44 may instruct the observer on the position and order of selection with characters, voices, and the like. The position information acquisition unit 44 acquires the coordinates (X1, Y1) of the origin M0, the coordinates (X2, Y2) of the rotation center point, and the coordinates (X3, Y3) of the pointer point Mi selected by the observer from the touch display 20. Then, the obtained coordinates of the three points are output to the pointer value calculation means 45.

  The pointer value calculation means 45 calculates the pointer value of the meter 2 from the position information selected by the observer's touch operation. The pointer value calculation unit 45 receives the three-point coordinates (X1, Y1), coordinates (X2, Y2), and coordinates (X3, Y3) output from the position information acquisition unit 44. The pointer value calculation unit 45 acquires the maximum value of the scale M from the scale information storage unit 32. The pointer value calculation means 45 calculates an angle θ from the origin M0 to the pointer point Mi from the coordinates of the three points, and converts the calculated angle θ into a pointer value using the maximum value of the scale M.

  For example, as shown in FIG. 3, the pointer value calculation unit 45 includes an angle θ1 from the origin M0 to the vertical line K passing through the rotation center point O, and an angle from the vertical line K passing through the rotation center point O to the pointer point Mi. θ2 is calculated, and “θ1 + θ2” is calculated as an angle θ from the origin M0 to the pointer point Mi. Then, the pointer value calculation means 45 calculates “θ × coefficient ÷ maximum scale angle” as the pointer value. Here, the coefficient is the maximum value of the scale M, and the maximum angle is the angle from the origin M0 to the maximum point Mmax of the scale M. When the scale M is arranged endlessly (annular) and the origin M0 of the scale M and the maximum point Mmax are at the same position, the maximum angle is 360 °. The pointer value calculating unit 45 stores the calculated pointer value in the pointer value information storage unit 33 and displays the pointer value on the touch display 20. In addition, when the interval of the scale of the meter 2 is not constant, an approximate expression may be used.

  Next, a method for calculating the angles θ1 and θ2 will be described with reference to FIG. FIG. 4 is an example of a flowchart showing a process for calculating the angle θ1. Although explanation of the method of calculating the angle θ2 is omitted, using the coordinates (X2, Y2) of the rotation center point O and the coordinates (X3, Y3) of the pointer point Mi, the same as the angle θ1 described below. Can be calculated.

  The pointer value calculation means 45 calculates the difference (ΔX) between X1 and X2 (step S1), and calculates the difference (ΔY) between Y1 and Y2 (step S2). Next, the pointer value calculation unit 45 determines whether or not the calculated differences ΔX and ΔY are not zero (step S3). If the difference ΔX or ΔY is zero, the pointer value calculation unit 45 advances the process to step S4 to display an error on the touch display 20 (step S4), and ends the process. On the other hand, if the difference ΔX or ΔY is not zero, the guideline value calculation unit 45 advances the process to step S5.

If the difference ΔX or ΔY is not zero (“Yes” in step S3), the pointer value calculation unit 45 uses the equation “θ1 = tan ⁻¹ (| ΔY | / | ΔX |)” of the inverse tangent function. To calculate the angle θ1 (step S5). Next, the pointer value calculation unit 45 multiplies the angle θ1 obtained in step S5 by “180 / π” to change the unit of the angle θ1 from radians (rad) to degrees (°) (step S6).

  Next, the pointer value calculation means 45 adds or subtracts a predetermined angle to the value calculated in step S6 based on the positional relationship between the origin M0 (X1, Y1) and the rotation center point (X2, Y2) (step S7 to step S7). S12). For example, when the differences ΔX and ΔY are both positive values (“Yes” in step S7), the pointer value calculation unit 45 subtracts the value θ1 calculated in step S6 from “90” to obtain a new angle θ1. (Step S8). Further, when the difference ΔX is a positive value and ΔY is a negative value (“Yes” in step S9), the pointer value calculation unit 45 newly adds “90” to the value θ1 calculated in step S6. The angle θ1 is set (step S10).

  In addition, when the differences ΔX and ΔY are both negative values (“Yes” in step S11), the pointer value calculation unit 45 obtains a new angle θ1 by subtracting the value θ1 calculated in step S6 from “270”. (Step S12). Further, the pointer value calculating means 45 steps to “270” when all of “No” is determined in steps S7, S9, and S11 (that is, when the difference ΔX is a negative value and ΔY is a positive value). A value obtained by adding the value θ1 calculated in S6 is set as a new angle θ1 (step S13).

  Next, the pointer value calculation unit 45 determines whether or not the value θ1 calculated in steps S8, S10, S12, and S13 is “180” or less (step 14). If it is “180” or less (“Yes” in step S14), the process is terminated as it is. If it is greater than “180” (“No” in step S14), steps S8, S10, S12, S13 are performed. A value obtained by subtracting 360 from the value θ1 calculated in step S1 is set as a new angle θ1 (step S15).

<< About the usage method of the guideline value reading apparatus according to the first embodiment >>
With reference to FIG. 5 (refer to FIGS. 1 to 4 as appropriate), a method of using the pointer value reading device 1 according to the first embodiment will be described. FIG. 5 is an example of a flowchart showing a flow of processing of the pointer value reading device 1 according to the first embodiment. The process shown in FIG. 5 starts when the digital camera 10 is turned on by an observer, for example.

  The photographing assistance means 41 displays the guide g (see FIG. 2A) on the touch display 20 (step S21). The observer takes an image of the meter 2 in accordance with the displayed guide g. The captured image G is stored in the captured image storage unit 31 by the captured image acquisition unit 42. Since the photographed image G serves as evidence for verifying the test contents, it is preferable to store the photographed image G in the photographed image storage means 31 in this way.

  Next, the captured image display means 43 enlarges and displays the captured image G on the touch display 20 (step S22). The observer selects the origin M0 of the meter 2 of the captured image G displayed on the touch display 20 by a touch operation. When a touch operation is performed on the touch display 20, the position information acquisition unit 44 acquires the coordinates (X1, Y1) of the selected origin M0 (step S23). Here, it is assumed that the observer is informed in advance of the position and order of touching by an operation manual, for example.

  Next, the observer selects the rotation center point O of the pointer 2b of the captured image G displayed on the touch display 20 by a touch operation. When a touch operation is performed on the touch display 20, the position information acquisition unit 44 acquires the coordinates (X2, Y2) of the selected rotation center point O (step S24). Subsequently, the observer selects the pointer point Mi of the pointer 2b of the captured image G displayed on the touch display 20 by a touch operation. When a touch operation is performed on the touch display 20, the position information acquisition unit 44 acquires the coordinates (X3, Y3) of the selected pointer point Mi (step S25). Here, the captured image display means 43 may enlarge and display the part touched next by the observer in order to make the data input by the observer accurate. Further, in order to facilitate the confirmation work by the observer, the periphery of the part touched by the observer may be enlarged and displayed.

  Next, the pointer value calculation means 45 determines the angle θ1 from the origin M0 to the vertical line K passing through the rotation center point O as the coordinates (X1, Y1) of the origin M0 and the coordinates (X2, Y2) of the rotation center point O. (Step S26). The process shown in step S26 is as described above with reference to FIG. Subsequently, the pointer value calculation means 45 determines the angle θ2 from the vertical line K passing through the rotation center point O to the pointer point Mi, the coordinates (X2, Y2) of the rotation center point O, and the coordinates (X3, Y3) of the pointer point Mi. ) And the same as in the case of the angle θ1 (step S27).

  Next, the pointer value calculating means 45 calculates the angle θ from the origin M0 to the pointer point Mi by “θ = θ1 + θ2” (step S28). Subsequently, the pointer value calculating unit 45 calculates the pointer value by “pointer value = θ × coefficient ÷ 360 (maximum angle of scale)” (step S29). Here, the coefficient is the maximum value of the scale M. The pointer value calculating unit 45 stores the pointer value calculated in step S29 in the pointer value information storage unit 33 and displays it on the touch display 20 (step S30).

  As described above, the pointer value reading device 1 according to the first embodiment includes the coordinates (X1, Y1) of the origin M0 of the scale M selected by the observer, the coordinates (X2, Y2) of the rotation center point O, and the pointer. A pointer value is calculated from the coordinates of the point (X3, Y3). Therefore, it is possible to accurately read the pointer value of the meter 2 (for example, a round meter) in which the scale M is arranged on the arc, regardless of the state of the captured image. When the range of the maximum angle θmax of the scale M is “0 <θmax <360 °”, the origin M0 of the scale M and the maximum point Mmax are different from each other (for example, the maximum angle of the scale M is 180 °). In this case, the coordinates of the maximum point Mmax of the scale M are further acquired, and the pointer value is calculated by the ratio between the angle θ of the origin M0 to the pointer point Mi and the maximum angle θmax from the origin M0 to the maximum point Mmax. Also good.

[Second Embodiment]
≪About the configuration of the guideline value reading apparatus according to the second embodiment≫
With reference to FIG. 6, the structure of the pointer value reading apparatus 101 according to the second embodiment will be described. In the following, functions related to the present invention will be described, and descriptions of functions not related will be omitted. The pointer value reading device 101 reads the pointer value of the analog type instrument 3 having the pointer as a digital value. Here, the pointer value reading device 101 is assumed to be a portable tablet terminal similar to the first embodiment. The pointer value reading device 101 includes a digital camera 10, a touch display 20, a storage unit 30, and a control unit 140.

  In the second embodiment, a stationary type staff is assumed as the meter 3 that is a subject to be photographed by the digital camera 10. The meter 3 includes a scale plate 3a with a scale M on a straight line, and a pointer 3b installed on the left side of the scale plate 3a so as to freely move up and down. The tip of the pointer 3b points to an arbitrary position on the scale M.

  The control unit 140 is realized by a program execution process by a CPU, a dedicated circuit, or the like. When the control unit 140 is realized by a program execution process, the storage unit 30 stores a program for realizing the function of the control unit 140. The control unit 140 includes a photographing assist unit 141, a photographed image acquisition unit 42, a photographed image display unit 43, a position information acquisition unit 144, and a pointer value calculation unit 145. Hereinafter, the contents of functions different from those of the first embodiment will be described.

  The imaging assistance unit 141 assists the imaging of the instrument 3 by the observer. The imaging assistance unit 141 acquires the captured image Gn from the digital camera 10 and causes the touch display 20 to display the captured image G (n + g) in which the acquired captured image Gn is overlapped with a guide g that assists the capturing of the instrument 3. The guide g may be any as long as the instrument 3 can be photographed from the front without tilting. In the present embodiment, as illustrated in FIG. 7A, the photographing assisting unit 141 displays a rectangular guide g on the center portion of the touch display 20. Note that the photographing assistance unit 141 may display a guide (not shown) indicating the position of the bottom or top of the meter 3 or the like.

  The position information acquisition unit 144 acquires position information (coordinates) of a point designated by the observer's touch operation. On the touch display 20, as shown in FIG. 7B, the captured image G of the instrument 3 is displayed by the captured image display means 43. The observer sequentially selects a total of three points including the origin M0 of the meter 3, the maximum point Mmax of the meter 3, and the pointer point Mi of the pointer 3b displayed as the captured image G. A mark is displayed at a selected place on the touch display 20. Here, it is assumed that the observer is informed beforehand of the position and order of selecting the captured image G by an operation manual or the like. The position information acquisition means 144 is the coordinates (X1, Y1) of the origin M0 of the meter 3 selected by the observer, the coordinates (X2, Y2) of the maximum point Mmax of the meter 3, and the coordinates (X3) of the pointer point Mi of the pointer 3b. , Y3) is acquired from the touch display 20, and the acquired three coordinates are output to the pointer value calculation means 145.

  The pointer value calculation means 145 calculates the pointer value of the meter 3 from the position information selected by the observer's touch operation. The pointer value calculation means 145 receives the coordinates (X1, Y1), coordinates (X2, Y2), and coordinates (X3, Y3) of the three points output from the position information acquisition means 144. In addition, the pointer value calculating unit 145 acquires the maximum value of the scale M from the scale information storage unit 32. The pointer value calculation means 145 calculates the pointer point from the maximum distance Hmax (see FIG. 8) from the coordinates (X1, Y1) of the origin M0 to the coordinates (X2, Y2) of the maximum point Mmax and the coordinates (X1, Y1) of the origin M0. A distance H (see FIG. 8) to the coordinates (X3, Y3) of Mi is calculated, and a pointer value is calculated from the ratio “H / Hmax” and the maximum value of the scale M. The pointer value calculating unit 145 stores the calculated pointer value in the pointer value information storage unit 33 and displays the pointer value on the touch display 20.

<< About the usage method of the guideline value reading apparatus according to the second embodiment >>
With reference to FIG. 9 (refer to FIGS. 6 to 8 as appropriate), a method of using the pointer value reading device 101 according to the second embodiment will be described. FIG. 9 is an example of a flowchart showing a flow of processing of the pointer value reading apparatus 101 according to the second embodiment. The process shown in FIG. 9 is started when the digital camera 10 is turned on by an observer, for example.

  The imaging assistance unit 141 displays the guide g on the touch display 20 (step S41). The observer takes an image of the instrument 3 in accordance with the displayed guide g. The captured image G is stored in the captured image storage unit 31 by the captured image acquisition unit 42. Since the photographed image G serves as evidence for verifying the test contents, it is preferable to store the photographed image G in the photographed image storage means 31 in this way.

  Next, the captured image display means 43 enlarges and displays the captured image G on the touch display 20 (step S42). The observer selects the origin M0 of the meter 3 of the captured image G displayed on the touch display 20 by a touch operation. When a touch operation is performed on the touch display 20, the position information acquisition unit 144 acquires the coordinates (X1, Y1) of the selected origin M0 (step S43). Here, it is assumed that the observer is informed in advance of the position and order of touching by an operation manual, for example.

  Next, the observer selects the maximum point Mmax of the meter 3 of the captured image G displayed on the touch display 20 by a touch operation. When a touch operation is performed on the touch display 20, the position information acquisition unit 144 acquires the coordinates (X2, Y2) of the selected maximum point Mmax (step S44). Subsequently, the observer selects the pointer point Mi of the pointer 3b of the captured image G displayed on the touch display 20 by a touch operation. When a touch operation is performed on the touch display 20, the position information acquisition unit 144 acquires the coordinates (X3, Y3) of the selected pointer point Mi (step S45). Here, the captured image display means 43 may enlarge and display the part touched next by the observer in order to make the data input by the observer accurate. Further, in order to facilitate the confirmation work by the observer, the periphery of the part touched by the observer may be enlarged and displayed.

  Next, the guideline value calculation means 145 calculates the guideline value by “guideline value = (Y3−Y2) × coefficient ÷ (Y1−Y2)” (step S46). Here, the coefficient is the maximum value of the scale M. The pointer value calculation unit 145 stores the pointer value calculated in step S26 in the pointer value information storage unit 33 and displays it on the touch display 20 (step S47).

  As described above, the pointer value reading device 101 according to the second embodiment includes the coordinates (X1, Y1) of the origin M0, the coordinates (X2, Y2) of the maximum point Mmax, and the pointer point of the meter 3 selected by the observer. A pointer value is calculated from the coordinates of (X3, Y3). Therefore, it is possible to accurately read the pointer value of an instrument (for example, a scale) in which the scale M is arranged on a straight line, regardless of the state of the captured image.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can implement in the range which does not change the meaning of a claim. The modification of embodiment is shown below.

  The pointer value reading device 1 of the first embodiment has a digital camera 10 assuming a tablet terminal. However, the configuration of the pointer value reading device 1 is not limited to this, and may be a device that does not include the digital camera 10 (for example, a stationary PC (Personal Computer)). In that case, the pointer value reading device 1 does not need to include the photographing auxiliary means 41 and the photographed image acquisition means 42, and it is sufficient to obtain the photographed image G from another device by communication. The same applies to the second embodiment.

1,101 Pointer value reading device 2,3 Instrument 10 Digital camera (photographing means)
20 Touch display (input means, display means)
Reference Signs List 30 storage means 31 photographed image storage means 32 scale information storage means 33 pointer value information storage means 40 control means 41, 141 photographing auxiliary means 42 photographed image acquisition means 43 photographed image display means 44, 144 position information acquisition means 45, 145 pointer value Calculation means M Scale g Guide G Photographed image

Claims (4)

A pointer value reading device that reads a pointer value indicated by a pointer of the meter from a captured image of the meter photographed by the photographing means,
A captured image display means for displaying the captured image on a display means in which two-dimensional coordinates are set;
Position information acquisition means for acquiring an origin position, a maximum point position of the scale displayed on the display means, a rotation center point position of the pointer, and a pointer point position indicated by the pointer based on a user's selection operation; ,
A virtual first rotation angle of the pointer from a coordinate of the origin position to a coordinate of the maximum point position centered on the coordinates of the rotation center point position and the origin centered on the coordinates of the rotation center point position A ratio of the second rotation angle of the pointer from the coordinate of the position to the coordinate of the pointer point position, and a pointer value calculating means for calculating the pointer value from the maximum value of the scale acquired from the storage means;
A pointer value reading device comprising: A pointer value reading device that reads a pointer value indicated by a pointer of the meter from a captured image of the meter photographed by the photographing means,
A captured image display means for displaying the captured image on a display means in which two-dimensional coordinates are set;
Position information acquisition means for acquiring the origin position of the scale of the instrument displayed on the display means, the maximum point position, and the pointer point position indicated by the pointer based on a user's selection operation;
A virtual first movement distance of the pointer from the coordinates of the origin position to the coordinates of the maximum point position and a second movement distance of the pointer from the coordinates of the origin position to the coordinates of the pointer point position A guideline value calculation means for calculating the guideline value from the ratio and the maximum value of the scale acquired from the storage means;
A pointer value reading device comprising: A pointer value reading program for reading a pointer value indicated by a pointer of the instrument from a photographed image of the instrument photographed by the photographing means,
Computer
A captured image display means for displaying the captured image on a display means in which two-dimensional coordinates are set;
Position information acquisition means for acquiring an origin position, a maximum point position of the scale displayed on the display means, a rotation center point position of the pointer, and a pointer point position indicated by the pointer based on a user's selection operation; ,
A virtual first rotation angle of the pointer from a coordinate of the origin position to a coordinate of the maximum point position centered on the coordinates of the rotation center point position and the origin centered on the coordinates of the rotation center point position A ratio of the second rotation angle of the pointer from the coordinate of the position to the coordinate of the pointer point position and the maximum value of the scale acquired from the storage unit, and the pointer value calculating unit for calculating the pointer value Guideline value reading program. A pointer value reading program for reading a pointer value indicated by a pointer of the instrument from a photographed image of the instrument photographed by the photographing means,
Computer
A captured image display means for displaying the captured image on a display means in which two-dimensional coordinates are set;
Position information acquisition means for acquiring the origin position of the scale of the instrument displayed on the display means, the maximum point position, and the pointer point position indicated by the pointer based on a user's selection operation;
A virtual first movement distance of the pointer from the coordinates of the origin position to the coordinates of the maximum point position and a second movement distance of the pointer from the coordinates of the origin position to the coordinates of the pointer point position A pointer value reading program for functioning as a pointer value calculating means for calculating the pointer value from the ratio and the maximum value of the scale acquired from the storage means.

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