JP2005267365A - Method for reading pointer value of pointer rotary meter, device for reading pointer value of pointer rotary meter and program for reading meter pointer value - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce mixing of noise components in brightness measurement and read a pointer value more accurately even if a character, a numeral or the like is included in a display part including the pointer of a pointer rotary meter. <P>SOLUTION: A device for reading the pointer value of the pointer rotary meter has a video camera 1 for photographing the display part including the pointer of the meter, a ROM 201 in which a table or the like indicating relationship between the rotation angle of the pointer and a measured value, an image memory 204 for storing the brightness data on a captured image, and a CPU 200 which measures brightness on a measurement line, in a radial direction, starting from the rotation center of the pointer to a predetermined distance at predetermined intervals, in the captured image, performs arithmetic processing for integrating the measured values over a movable range of the pointer at each predetermined unit center angle, identifies an angle position corresponding to an integrated value exceeding a threshold among acquired integrated values as the position of the pointer, and refers to the table to find a measured value displayed by the pointer at present. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pointer value reading method for a pointer rotary meter installed in a building that displays measured values such as current, voltage, and electric energy by a pointer, and a pointer value reading device for a pointer rotary meter.

Many recent meters such as wattmeters have a digital output terminal, but few meters in existing buildings have a digital output terminal. Therefore, when a customer performs an energy-saving diagnosis of an existing building, a meter having a digital output terminal is installed on the power line to measure energy.
There has also been proposed an automatic meter reading device that automatically captures a pointer value by taking an image of a disk-type needle meter (see, for example, Patent Document 1).

Further, an imaging unit that captures an imaging target range including a display body that displays metering information of the meter, and a search for specifying the position of the display body within the imaging target range based on image information of the imaging unit There has been proposed a meter information automatic reading device provided with processing and image processing means for executing reading processing for reading display information of the display body whose position has been specified by the search processing (for example, Patent Documents) 2).
JP 2002-288777 A JP 2002-288629 A

However, the above-described method of installing a meter having a digital output terminal on the power line has a problem that it is troublesome and dangerous because it is necessary to install a new meter for temporary measurement such as energy saving diagnosis. There was.
Further, the automatic meter reading device described in Patent Document 1 has a problem that image processing is complicated.
Furthermore, the meter information automatic reading device described in Patent Document 2 has a problem that the image processing is complicated and the device is large-scale.

  On the other hand, the present inventor already has a simple device configuration, does not require a new meter, and does not require complicated image processing, and can easily and safely perform the pointer of the pointer rotary meter. A pointer value reading method and apparatus for a pointer rotary meter capable of reading a value are proposed.

A pointer value reading method and device (Japanese Patent Application No. 2003-271477) for a pointer rotary meter that we have proposed captures a display unit including a pointer of the pointer rotary meter, and from the rotation center of the pointer in the captured image. Measure the luminance of the band-shaped part intersecting the pointer surrounded by the circumference of different radii, and specify the part of the brightness of the band-shaped part that exceeds a predetermined threshold as the position of the pointer The rotation angle of the pointer is obtained, and the measurement value displayed by the current pointer is obtained from the relationship between the rotation angle of the pointer stored in advance and the measurement value.
In the pointer value reading method and apparatus of the pointer rotary meter described above, the pointer rotary type is measured because the image captured by the pointer rotary meter is measured only in the circumferential direction of a predetermined radius from the rotation center of the pointer. When there are scales and characters on the display unit of the meter, there is a problem that the imaging data contains a lot of noise and the measurement accuracy is lowered.

  The present invention has been made in view of such circumstances, and the configuration of the apparatus is simple, there is no need to newly install a meter, and complicated and simple image processing is performed without complicated image processing. Provides a pointer value reading method of a pointer rotary meter, a pointer value reading device of a pointer rotary meter, and a meter pointer value reading program capable of reading the pointer value of the type meter and reading the pointer value more accurately The purpose is to do.

  The invention according to claim 1 is a pointer value reading method of a pointer rotary meter that reads a pointer value of a pointer rotary meter that displays a measured value by a pointer, and includes a display unit that includes the pointer of the pointer rotary meter. A first step of imaging, and measuring a luminance on a measurement line in a radial direction from a rotation center of the pointer in the captured image to a predetermined distance in a radial direction to a predetermined distance, and integrating the measurement value Steps 2 and 2 are performed over a movable range of the pointer for each predetermined unit center angle, and the integrated value obtained exceeds a preset threshold value among the obtained integrated values. A third step of specifying an angular position as the position of the pointer, and a relationship between a pre-stored pointer rotation angle and a measured value for obtaining a rotation angle from a reference position to the specified pointer position A fourth step of obtaining the weight value to be displayed for the current the pointer, and having a.

  According to a second aspect of the present invention, in the pointer value reading method of the pointer rotary meter according to the first aspect, the adjacent ones set in the radial direction from the rotation center of the pointer for each unit central angle. The interval between the measurement lines is set to be smaller than the width of the pointer of the meter at the tip portion.

  According to a third aspect of the present invention, there is provided a pointer value reading method for a pointer rotary meter according to any one of the first and second aspects, wherein a plurality of integral values exceeding a preset threshold value are included among the integral values. In some cases, the angular position corresponding to the maximum integral value among the integral values is specified as the position of the pointer.

  According to a fourth aspect of the present invention, in the pointer value reading method of the pointer rotary meter according to any one of the first to third aspects, an image captured by the entire display unit including the pointer of the pointer rotary meter. If the marker moves on the surface of the pointer rotary meter in advance, the marker or the pattern already existing on the scale plate of the meter is used as a marker, and the rotation center and circumference of the pointer are equal to the movement distance and direction. It is characterized by moving coordinates.

  According to a fifth aspect of the present invention, there is provided a pointer value reading device for a pointer rotary meter for reading a pointer value of a pointer rotary meter for displaying a measured value by a pointer, and a display unit including the pointer of the pointer rotary meter Imaging means for imaging, input means for setting measurement conditions, a table indicating a relationship between a rotation angle of the pointer and a measured value, or a storage means storing a mathematical expression for converting the relationship, and the captured image Based on the image memory that stores the luminance data of the image in units of pixels and the measurement conditions set by the input unit, the luminance data is read from the image memory, and the radial direction from the center of rotation of the pointer in the captured image A calculation process for measuring the luminance on the measurement line at a predetermined interval in the radial direction and integrating the measured value is performed on the movable range of the pointer for each predetermined unit central angle. The angle position corresponding to the integral value exceeding a preset threshold value among the obtained integral values is specified as the position of the pointer, and the rotation angle from the reference position to the specified pointer position is determined. Calculation means for obtaining a current measured value displayed by the pointer from the relationship between the rotation angle of the pointer stored in advance in the storage means for obtaining and the measured value.

  According to a sixth aspect of the present invention, in the pointer value reading device of the pointer rotary meter according to the fifth aspect, the input means sets the radial direction from the rotation center of the pointer for each unit central angle. The interval between the adjacent measurement lines is set to be smaller than the width of the pointer of the meter at the tip.

  The invention according to claim 7 is the pointer value reading device of the pointer rotary meter according to claim 5 or 6, wherein the calculating means exceeds a preset threshold value among the integral values. When there are a plurality of integral values, the angular position corresponding to the maximum integral value among the integral values is specified as the position of the pointer.

  According to an eighth aspect of the present invention, in the pointer value reading device for a pointer rotary meter according to any one of the fifth to seventh aspects, the calculation means includes an entire display unit including a pointer of the pointer rotary meter. However, when moving within the captured image, the marker or a pattern already existing on the scale plate of the meter that has been previously attached to the surface of the pointer rotating meter is used as a marker, and the pointer is rotated with the same moving distance and direction. The center and circumference coordinates are moved.

  The invention according to claim 9 is a meter pointer value reading program for reading a pointer value of a pointer rotary meter that displays a measured value by a pointer, and includes a display unit including a pointer of the pointer rotary meter. A first step of imaging, and measuring a luminance on a measurement line in a radial direction from a rotation center of the pointer in the captured image to a predetermined distance in a radial direction to a predetermined distance, and integrating the measurement value Steps 2 and 2 are performed over a movable range of the pointer for each predetermined unit center angle, and the integrated value obtained exceeds a preset threshold value among the obtained integrated values. A third step of specifying an angular position as the position of the pointer, a pre-stored pointer rotation angle and a measured value for obtaining a rotation angle from a reference position to the specified pointer position Characterized in that to execute a fourth step of obtaining the weight value to be displayed for the current the pointer from the relationship to the computer.

  As described above, according to the present invention, the display unit including the pointer of the pointer rotary meter is imaged, and the luminance on the measurement line in the radial direction from the rotation center of the pointer in the captured image is predetermined in the radial direction. An arithmetic process for measuring the distance up to a predetermined distance and integrating the measured value is performed over a movable range of the pointer for each predetermined unit central angle, and a predetermined threshold value among the obtained integrated values is set. The relationship between the pre-stored pointer rotation angle and the measured value for determining the rotation angle from the reference position to the specified pointer position by specifying the angular position corresponding to the integrated value exceeding the reference position Since the measurement value displayed by the current pointer is calculated from the above, the device configuration is simple, there is no need to newly install a meter, and no complicated image processing is performed, and it is simple and safe. It can be read pointer value of needle rotation meter.

  In addition, since the luminance on the measurement line in the radial direction from the center of rotation of the pointer in the captured image of the pointer rotary meter is measured, letters, numbers, etc. are displayed on the display unit including the pointer of the pointer rotary meter. Even if it is included, the mixing of noise components in the luminance measurement can be reduced, and the guideline value can be read more accurately.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the configuration of a pointer value reading device for a pointer rotary meter according to an embodiment of the present invention. The pointer value reading device according to the embodiment of the present invention processes a display unit including a pointer of the pointer rotary meter 3 with a video camera 1 that images the pointer rotary meter 3 and image data captured by the video camera 1. And a data processing device 2. In the present embodiment, it is assumed that the pointer rotary meter 3 is a wattmeter.

The data processing apparatus 2 includes a CPU 200, a ROM 201, a RAM 202, an A / D converter 203, an image memory 204, a display unit 205, an input unit 206, and a printer 207.
The ROM 201 stores various control programs and fixed data. The ROM 201 also stores an angle / degree indicating the relationship between the rotation angle θ (°) of the pointer from the reference position (base line XX ′) of the scale of the pointer rotary meter shown in FIG. A power amount conversion table and a meter pointer value reading program for reading the pointer value of the pointer rotary meter 3 are stored. 4 shows an image obtained by picking up the pointer rotating meter with a video camera. In FIG. 4, the base line XX ′ is the X axis, and the axis orthogonal thereto is the Y axis.

The RAM 202 temporarily stores calculation processing results by the CPU 200, data input by the input unit 206, and the like. The image memory 204 stores image data picked up by the video camera 1.
The display unit 205 displays various data and reading values of the pointer rotary meter 3.

The input unit 206 includes a numeric keypad, character keys, function keys, a power ON / OFF key, and the like.
The CPU 200 controls each unit by executing a control program stored in the ROM 201, and realizes an automatic reading function of the pointer rotary meter 3 by executing a meter pointer value reading program.

The video camera 1 is used for the image pickup means of the present invention, and the CPU 200 is used for the calculation means of the present invention.
The CPU 200, ROM 201, RAM 202, A / D converter 203, image memory 204, display unit 205, input unit 206, and printer 207 are connected to each other via a bus 210.

  Next, the operation at the time of reading the pointer value of the pointer rotary meter 3 in the data processing device 2 will be described. This operation is performed by the CPU 200 executing the meter pointer value reading program shown in FIGS. 2 and 3 stored in the ROM 201. The processing contents will be described with reference to the flowcharts of FIGS. When the meter pointer value reading program is started, initial setting is first performed based on data input from the input unit 206 (step 300).

  In this initial setting, the coordinates O (x0, y0) of the rotation center of the pointer of the pointer rotary meter 3, the unit center angle Δθ that is the measurement interval in the circumferential direction, the measurement interval ΔL on the measurement line in the radial direction, and the position of the pointer Data such as a luminance threshold value VTH for determining the above is stored in a predetermined memory area of the RAM. Here, the “unit central angle” refers to a central angle that defines the minimum unit of the measurement interval in the circumferential direction around which the pointer of the pointer rotary meter 3 rotates.

  FIG. 4 shows the relationship between the base line and the measurement line in the pointer rotary meter 3. In the figure, a base line X-X ′ is a reference position of the scale of the pointer rotary meter 3 and is set so as to pass through the scale of the zero point and the rotation center O of the pointer. The angle formed by the measurement line Lj in the radial direction of the pointer rotary meter 3 and the measurement line Lj + 1 adjacent thereto is the unit center angle Δθ described above. The distance between adjacent measurement lines set in the radial direction from the center of rotation of the pointer, that is, the angle Δθ is set to be smaller than the width of the pointer of the meter at the tip. In addition, an angle formed by the base line X-X ′ and the pointer is θ. As shown in FIG. 4, the measurement line Lx is divided into k in the radial direction, the interval is ΔL, and the luminance at each measurement point is V1, V2,.

  Next, a video signal indicating an image on the display unit of the pointer rotary meter 3 captured by the video camera 1 is captured (step 301), and converted into digital data (luminance data) by the A / D converter 203 (step 301). 302). The converted luminance data is stored in the image memory 204 in association with the coordinate data (step 303).

  Next, luminance measurement in the image on the display unit of the pointer rotary meter 3 is started (step 304), the luminance data Vi in the radial direction of the central angle nΔθ is captured (step 305), and each measurement in the radial direction for each measurement line L is performed. An integral operation is performed on the luminance data Vi (i = 1 to k: k is an integer) at the point by the following equation (step 306). Here, θ = nΔθ (n = 1 to N) where θ is a central angle of the circumferential measurement position where the pointer of the pointer rotary meter 3 rotates. The circumferential measurement interval at which the pointer of the pointer rotary meter 3 rotates is set by the soft counter n.

Next, the obtained integral value V _Qn is stored in a predetermined area of the RAM 202 (step 307). Further, in step 308, whether or not n = N, that is, whether or not the integral value V _Qn has been obtained for all measurement lines (radial direction) over the entire measurement range in the circumferential direction, which is the movable range of the pointer. Determined. If the determination in step 308 is negative, the counter n is incremented by +1 (step 309), the process returns to step 305, and the processes in steps 305 to 308 are repeated.

On the other hand, if the determination in step 308 is affirmative, the counter n is reset (step 310), and the luminance value for determining the integrated value V _Qn , the background of the display portion of the pointer rotary meter 3, and the pointer is determined. The threshold value V _TH indicating the reference value is compared in magnitude to determine whether or not V _Qn <V _TH (condition 1) (step 311). Here, in this embodiment, the luminance of the background of the display unit of the pointer rotary meter 3 is relatively high, and the luminance of the pointer is lower than the luminance of the background.
If the determination in step 311 is negative, it is determined whether n = N, that is, whether or not the determination in step 311 has been performed for all integral values V _Qn (step 312).

If the determination in step 312 is negative, the counter n is incremented by +1 (step 313), and the process returns to step 311. If the determination in step 312 is affirmed, this process ends.
On the other hand, if the determination in step 311 is affirmed, it is determined whether or not there are a plurality of integral values V _Qn that satisfy condition 1 as the determination content of step 311 (step 314).
If the determination in step 314 is affirmative, the tip point of the measurement line L taking the maximum integral value V _Qn among the plurality of integral values V _Qn is set as P (step 315).
If the determination in step 314 is negative, the tip point of the measurement line L taking the integral value V _Qn is set as P (step 316).

Next, the coordinate data of the point P is taken from the RAM 202 (step 317), an angle γ formed by the line segment OP and the base line XX ′ is calculated, and this angle γ is set as a pointer angle (step 318).
Next, the amount of power with respect to the angle γ is obtained with reference to the angle / power conversion table shown in FIG. 5 stored in the ROM 201 (step 319).
Next, the electric energy obtained in step 319 is displayed on the display unit 205 and printed out by the printer 207 (step 320).
In the present embodiment, the pointer value is read based on the image data captured by the video camera 1 so as to face the pointer rotary meter 3. On the other hand, it may not be image data obtained by imaging the display unit of the pointer rotary meter 3.

  In this case, instead of steps 318 and 319 in FIG. 3, a correction calculation is performed in step 400 as shown in FIG. This correction calculation is already performed with reference to FIGS. 2 and 3 from image data obtained from the video signal output from the video camera 1 when the display unit including the pointer of the pointer rotary meter 3 is imaged from an oblique direction. This is an operation for converting the angle data γ ′ obtained by the above-described processing into angle data γ ′ in a state of facing.

As a method of this correction calculation, when the scale plate of the pointer rotary meter 3 is directly opposed, a circular image is taken, and when the image is taken from an oblique direction, a relative ellipse is taken. The angle data γ ′ can be obtained by creating an equation for correcting based on the positional relationship between the scales on the scale plate or a table that can directly convert the positional relationship between both scales.
The angle data γ ′ obtained by this correction calculation is used as the pointer angle (step 401), and the power amount with respect to the angle γ ′ is obtained by referring to the angle / power amount conversion table shown in FIG. Step 402). The other processes are the same as those in FIGS. 2 and 3, and a duplicate description is omitted.

It is to be noted that a meter frame or a mark having a fixed positional relationship with the meter frame is provided on the dial so that the display unit including the pointer of the pointer rotary meter 3 can be imaged, and these are tracked. Thus, the video camera 1 may always be able to image the display unit including the pointer of the pointer rotary meter 3. Thereby, it is possible to cope with the case where the installation position of the video camera 1 is changed.
Further, when the entire display unit including the pointer of the pointer rotary meter 3 moves within the captured image, the moving distance and direction thereof are measured based on the mark previously attached to the surface of the pointer rotary meter. Instead, the movement distance and direction may be measured using characters or the like displayed on the pointer rotary meter as feature points.

  Further, a meter pointer value reading program (FIGS. 2 and 3) for realizing the function of the data processing device 2 in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in the computer. You may perform the process performed by making it read into a system and performing. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if the WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system.

  Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

The program may be for realizing a part of the functions described above, and further, a program that can realize the functions described above in combination with a program already recorded in a computer system, a so-called difference file (difference). Program).
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes a design and the like within the scope not departing from the gist of the present invention.

The block diagram which shows the structure of the pointer value reading apparatus of the pointer rotary meter which concerns on embodiment of this invention. The flowchart which shows the processing content of the meter pointer value reading program performed by CPU in the pointer value reading apparatus shown in FIG. The flowchart which shows the processing content of the meter pointer value reading program performed by CPU in the pointer value reading apparatus shown in FIG. Explanatory drawing which shows the image of the pointer rotary meter imaged with the video camera in the pointer value reading apparatus shown in FIG. Explanatory drawing which shows the content of the angle / power conversion table stored in ROM in the pointer value reading apparatus shown in FIG. 6 is a flowchart showing correction calculation processing when a display unit including a pointer of the pointer rotary meter 3 is imaged from an oblique direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Video camera 2 ... Data processing apparatus 3 ... Pointer rotation type meter 200 ... CPU
201 ... ROM
202 ... RAM
203 ... A / D converter 204 ... Image memory 205 ... Display unit 206 ... Input unit 207 ... Printer 210 ... Bus

Claims (9)

A pointer value reading method for a pointer rotary meter that reads a pointer value of a pointer rotary meter that displays a measured value by a pointer,
A first step of imaging a display unit including a pointer of the pointer rotary meter;
A second step of measuring the luminance on a radial measurement line from the rotation center of the pointer in the captured image to a predetermined distance in the radial direction at a predetermined interval, and integrating the measured value;
The processing in the second step is performed over a movable range of the pointer for each predetermined unit center angle, and an angular position corresponding to an integral value exceeding a preset threshold value among the obtained integral values is determined as the pointer. A third step of identifying as a position of
A fourth step of obtaining a measurement value displayed by the current pointer from a relationship between a rotation angle of a pointer stored in advance for obtaining a rotation angle from a reference position to the identified pointer position and a measurement value; A pointer value reading method for a pointer rotary meter characterized by comprising:   The distance between adjacent measurement lines set in the radial direction from the center of rotation of the pointer for each unit center angle is set to be smaller than the width of the pointer of the meter at the tip. Item 2. A method for reading a pointer value of a pointer rotating meter according to Item 1.   When there are a plurality of integral values exceeding a preset threshold value among the integral values, an angular position corresponding to the maximum integral value among the integral values is specified as the position of the pointer, The pointer value reading method of the pointer rotary meter according to claim 1 or 2.   When the entire display unit including the pointer of the pointer rotary meter moves within the captured image, the marker already attached to the surface of the pointer rotary meter or a pattern already existing on the scale plate of the meter is used as a marker. 4. A pointer value reading method for a pointer rotary meter according to claim 1, wherein the rotation center and circumference coordinates of the pointer are moved in the same manner as the moving distance and direction thereof. A pointer value reading device for a pointer rotary meter that reads a pointer value of a pointer rotary meter that displays a measured value by a pointer,
Imaging means for imaging the display unit including the pointer of the pointer rotary meter;
Input means for setting measurement conditions;
A storage unit storing a table indicating a relationship between a rotation angle of the pointer and a measurement value or a mathematical expression for converting the relationship;
An image memory for storing luminance data of the captured image in units of pixels;
Based on the measurement condition set by the input means, luminance data is read from the image memory, and the luminance on the measurement line in the radial direction from the center of rotation of the pointer in the captured image is predetermined in the radial direction at predetermined intervals. An integral value that exceeds the preset threshold value among the obtained integral values is obtained by performing a calculation process for measuring up to a distance and integrating the measurement values over a movable range of the pointer for each predetermined unit center angle. Is determined as the position of the pointer, and the rotation angle of the pointer and the measured value stored in advance in the storage means for obtaining the rotation angle from the reference position to the specified pointer position. A calculation means for obtaining a measurement value displayed by the current pointer from the relationship;
A pointer value reading device for a pointer rotating meter, comprising:   The interval between the adjacent measurement lines set in the radial direction from the rotation center of the pointer by the input means is set smaller than the width of the pointer of the meter at the distal end portion for each unit central angle. The pointer value reading device for a pointer rotary meter according to claim 5.   The calculation means specifies, as a position of the pointer, an angular position corresponding to a maximum integration value among the integration values when there are a plurality of integration values exceeding a preset threshold value among the integration values. 7. The pointer value reading device for a pointer rotating meter according to claim 5, wherein the pointer value reading device is a pointer rotating meter.   In the case where the entire display unit including the pointer of the pointer rotary meter moves within the captured image, the arithmetic means already has a marker or a scale plate attached to the surface of the pointer rotary meter in advance. The pointer value reading of the pointer rotary meter according to any one of claims 5 to 7, wherein the pattern to be moved is used as a marker, and the center of rotation and circumference coordinates of the pointer are moved to be equal to the moving distance and direction thereof. apparatus. A meter pointer value reading program for reading a pointer value of a pointer rotary meter that displays a measured value by a pointer,
A first step of imaging a display unit including a pointer of the pointer rotary meter;
A second step of measuring the luminance on a radial measurement line from the rotation center of the pointer in the captured image to a predetermined distance in the radial direction at a predetermined interval, and integrating the measured value;
The processing in the second step is performed over a movable range of the pointer for each predetermined unit center angle, and an angular position corresponding to an integral value exceeding a preset threshold value among the obtained integral values is determined as the pointer. A third step of identifying as a position of
A fourth step of obtaining a measurement value displayed by the current pointer from a relationship between a rotation angle of a pointer stored in advance for obtaining a rotation angle from a reference position to the identified pointer position and a measurement value;
Meter pointer value reading program for causing a computer to execute.

Images