JPH0961218A - Color identifying device for drum water gage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color identifying device for a drum water gage capable of instantaneously grasping an installing state at the center by identifying the color of the circular window of the gage without failing to notice even when the water level height of the gage is rapidly varied. SOLUTION: When the color image signal of a facility to be identified photographed by an ITV camera is separated to red, green and blue, A-D converted and input, a color signal luminance calculator 300 obtains the mean luminances of red, green and blue signals in a region previously set by a color identifying region setter 400 and calculates the luminance value for identifying and discriminating. Whether the luminance value is in an identifiable range or not is discriminated by a color identifying and discriminating check unit 500, and a color identifier 600 obtains three spectral stimulus values, nonnalizes them to identify the colors. Whether the color identified by the unit 700 is correct or not is checked. When the color is correct, a result output unit 800 displays the result of the red or green identified by the identifier 600 and a video signal of a scene to be identified or a synthetic video signal on a display unit 900.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color identification of a drum water level gauge for identifying the color of a plurality of circular windows of a drum water level gauge used in a power plant or the like based on an image signal. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, an ITV camera is installed in a facility for color identification of a circular window of a drum water gauge, and an image signal from the ITV camera is input to a monitor television at the center.
The water level of the drum water level gauge was confirmed by visually observing the image signal of the monitor television and visually identifying the color of the circular window.

[0003]

By the way, in the identification method using the monitor TV, the monitor must constantly watch the monitor, which increases the burden on the monitor, and oversight due to fatigue when watching for a long time. However, there is a problem in that when the water level occurs or the water level of the drum water level gauge changes at high speed, the change may be overlooked.

The present invention has been made in view of the above circumstances, reduces the burden on the observing person, and does not overlook the change even when the water level of the drum water level gauge changes rapidly. An object of the present invention is to provide a color identification device for a drum water level gauge, which can identify the colors of a plurality of circular windows of a drum water level gauge and instantly grasp the equipment state at the center.

[0005]

SUMMARY OF THE INVENTION A color identification device for a drum water level gauge according to the present invention is an imaging means for taking an image of a drum water level gauge having a plurality of circular windows for identifying the water level of equipment and extracting a color image signal. A color signal separation means for separating a color image signal obtained from the image pickup means into red, green and blue color components; and a color signal separated by the color signal separation means
A / D converting means for D converting, color identifying area setting means for setting an image area including each circular window of the drum water level gauge as an image area for identifying each color signal separated by the color signal separating means, A color signal brightness calculation unit that calculates the identification brightness of each color signal separated by the color signal separation unit for the image area set by the color identification area setting unit, and the color signal brightness calculated by the color signal brightness calculation unit. A color identification determination check unit that determines whether or not the brightness is within a range that can be identified, and a color that identifies the color of the color signal when the brightness is identified by the color identification determination check unit. Identification means, identification result check means for checking whether the color identified by the color identification means is correct, and output contents when the color identification determination check means cannot identify, And having output means for outputting a check result of the identification result and the identification result checking means color identifying means, and display means for displaying the output contents of the output means.

Further, in the color identification device for a drum water level gauge according to the present invention, the color signal luminance calculation means is configured by the color identification area setting means for each of the red, green and blue color signals separated by the color signal separation means. The average brightness is calculated for the set image area, and the color identification determination check means determines that the brightness calculated based on the average brightness of the red, green and blue color signals calculated by the color signal brightness calculation means is within a predetermined range. It is characterized in that whether or not the brightness of each color signal can be identified is determined by whether or not

Further, in the color identification device for a drum water level gauge of the present invention, the color identification means uses the average luminance of the red, green and blue color signals calculated by the color signal luminance calculation means to calculate red, green and It is converted into a blue spectrum tristimulus value (Xi, Yi, Zi), the spectrum tristimulus value is normalized to obtain a normalized tristimulus value (xi, yi, zi), and the normalized tristimulus value (xi , Yi) is located in the color space of the CIE xy chromaticity diagram, and color discrimination is performed.

Further, in the color identification device for a drum water level gauge according to the present invention, the identification result checking means is arranged for each circular window of the identified drum water level gauge based on the state of the color arrangement of red or green corresponding to each circular window. The feature is that the correctness of the color is checked.

[0009]

In the color identification device for the drum water level gauge having the above-mentioned configuration, the color image signals of the drum water level gauge as the equipment to be identified which are photographed by the image pickup means are separated into red, green and blue, A / D converted and input. Then, the color signal brightness calculation means calculates the average brightness of each color signal of red, green, and blue for the area preset by the color recognition area setting means, and calculates the brightness value for identification determination. Whether or not the calculated luminance value is a identifiable value is determined by the color identification determination check unit, and if the color is identifiable, the color is identified by the color identification unit, and then the color identified by the identification result check unit is It is checked whether it is correct.

On the other hand, if the identification is not possible, the color identification is not performed. Therefore, even if the environment where the illuminance fluctuation is large and the image is too dark or too bright, or the color photographing state of the ITV camera as the image pickup means is unclear, the color identification is accurate. it can.

Further, since the discrimination result and the video signal of the scene to be discriminated or the synthesized video signal are displayed on the central display means, it becomes possible to grasp the equipment state at the center instantaneously and accurately.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a color identification device for a drum water gauge according to the present invention. In the figure, a color identification device for a drum water level gauge according to the present invention includes an ITV camera 10, a color signal separation unit 100, an A / D conversion input unit 200, a color signal luminance calculation unit 300, and a color identification area setting unit. 400, a color identification determination check unit 500, a color identification unit 600, an identification result check unit 700, a result output unit 800, and a display device 9
00.

In this embodiment, first, when the ITV camera 10 photographs the drum water level gauge of the target equipment, the color signal separation unit 100 outputs the color NT which the ITV camera 10 outputs.
The SC signal is separated into red, green and blue color components and an image signal is transmitted, and the A / D conversion unit 200 A / D converts each of the signals separated into red, green and blue and inputs the signals.

Next, the color signal brightness calculation unit 300 calculates the brightness for identification determination by obtaining the average brightness of each image signal of red, green and blue for the area preset by the color identification area setting unit 400. To do.

The color discrimination judgment check unit 500 judges whether or not the luminance value calculated by the color signal luminance calculation unit 300 is in the discriminable range, and when it is in the discriminable range, the color discrimination unit 600.
To identify the red or green color, and the identification result check unit 70
Check if the color identified by 0 is correct.

If the color identified by the identification result check unit 700 is correct, the result output unit 800 displays the result of the color identified by the color identification unit 600, the video signal of the identification target scene, and the like on the display device 900.

On the other hand, when the color identified by the identification result check unit 700 is not correct, the result indicating that the color identification is incorrect and the video signal of the scene to be identified are displayed on the display device 900.

On the other hand, when the color identification determination check unit 500 determines that the identification is not possible, the result indicating that the identification is not possible and the image signal of the scene to be identified are displayed on the display device 900 without performing the color identification. Color signal separation unit 100 in FIG.
May be, for example, a decoder or the like capable of separating the color composite signal photographed by the ITV camera 10 into red, green and blue color components.

FIG. 2 shows an example of the setting area including the entire circular window of the drum water level gauge which is preset by the color identification area setting section 400 in this embodiment. In the figure, the first circular window 460a and the second circular window 46 to be discriminated are identified with respect to the drum water level gauge 450 in the target image displayed on the monitor or the like.
Area 4 including the entire circular window such as 0b and the third circular window 460c
60 is set with an input device such as a mouse and a keyboard.

FIG. 3 shows an example of a range in which the color signal brightness calculating section 300 in this embodiment calculates the average brightness of red, green and blue for each circular window. The average luminance range of each circular window is a range 470a corresponding to the first circular window 460a obtained by calculating the y-projection distribution of the region 460 including the entire plurality of circular windows.
A range 470b corresponding to the second circular window 460b, a range 470c corresponding to the third circular window 460c, and the like.

FIG. 4 shows a specific configuration of the color signal luminance calculating section 300 shown in FIG.

In the figure, the color signal luminance calculating section 300 is
Red average brightness calculation unit 310 and green average brightness calculation unit 320
And a blue average brightness calculation section 330 and a brightness calculation section 340.

In the above structure, the red average luminance calculating section 31
0 uses the red image signal output from the A / D conversion unit 200 to calculate the y-projection distribution of the region 460 including the entire plurality of circular windows, and for each circular window, for example, the first circular window 460a
From the range 470a corresponding to the rectangle inside the first circular window 460a to the range 47 corresponding to the average luminance of the second circular window 460b corresponding to the rectangle inside the second circular window 460b.
From 0b, the average luminance of the third circular window 460c is calculated from the range 470c or the like corresponding to the rectangle inside the third circular window 460c.

Similarly, the green average luminance calculation unit 320 is
Using the green image signal output from the conversion unit 200, the y projection distribution of the region 460 including the entire plurality of circular windows is calculated,
For each circular window, for example, the average luminance of the first circular window 460a is a range 470 corresponding to the rectangle inside the first circular window 460a.
From a, the average brightness of the second circular window 460b is set to 3 from the range 470b corresponding to the rectangle inside the second circular window 460b.
The average luminance of the third circular window 460c is set to the third circular window 460c.
It is calculated from the range 470c or the like corresponding to the inner rectangle.

Similarly, the blue average luminance calculating section 330 determines the A / D
Using the green image signal output from the conversion unit 200, the y projection distribution of the region 460 including the entire plurality of circular windows is calculated,
For each circular window, for example, the average luminance of the first circular window 460a is a range 470 corresponding to the rectangle inside the first circular window 460a.
From a, the average luminance of the second circular window 460b corresponds to the rectangle inside the second circular window 460b, and the average luminance of the third circular window 460c corresponds to the rectangle inside the third circular window 460c. It is calculated from the range 470c or the like.

The brightness calculator 340 calculates the average brightness of the first circular window 460a for each circular window as the first circular window 46, for example.
0a, the red average brightness calculated by the red average brightness calculation section 310, the green average brightness calculated by the green average brightness calculation section 320, and the blue average brightness calculated by the blue average brightness calculation section 330. The brightness for determining whether or not each circular window can be identified by the unit 500 is calculated by the following equation.

[0027]

[Equation 1]

In the equation (1), Ei is the brightness of the i-th identification target circular window, Ri is the red average brightness of the i-th identification target circular window calculated by the red average brightness calculation unit 310, and Gi is the green average. The green average brightness of the i-th identification target circular window calculated by the brightness calculation unit 320 and Bi the blue average brightness of the i-th identification target circular window calculated by the blue average brightness calculation unit 330.

FIG. 5 shows an example of the judgment possible range of the color discrimination judgment check unit 500 in FIG. The brightness of the spectrum light (monochromatic light) of each color is in the range shown in FIG. 5, but the brightness range of the spectrum light of red and green is about 0.3 or more and about 0.8 or less, and the color signal brightness calculation unit 300 (1)
If the discrimination of the luminance Ei of the i-th discrimination target circular window calculated by the equation is 0.3 ≦ Ei ≦ 0.8, the discrimination is made possible, and Ei <0.3.
Alternatively, if Ei> 0.8, it cannot be identified.

Next, FIG. 6 shows the configuration of the color identification section 600 in FIG. In the figure, the color identification unit 600 includes a signal system conversion unit 610, a spectrum tristimulus value calculation unit 620,
It is composed of a spectrum 3 stimulus value normalization unit 630 and an identification unit 640.

In the above configuration, the color identification determination check unit 5
00 checks the luminance of red or green in the color signal output from the color signal luminance calculation unit 300 and determines that the color signal can be identified, the color signal output from the color identification determination unit 500 is output to the NTSC by the signal system conversion unit 610. System signals (R _N , G _N ,
B _N ) is converted into CIE system signals (R, G, B) by the following equation.

[0032]

[Equation 2]

The spectrum 3 stimulus value calculation unit 620 uses the CIE1
Spectra of i-th discriminative target circular window using 931XYZ system 3
The stimulation value (Xi, Yi, Zi) is calculated by the following formula.

[0034]

(Equation 3)

Here, each coefficient at the time of conversion into (Xi, Yi, Zi) is different between the equations (3) and (4). Each coefficient is a value empirically obtained in relation to the color cast state of the input image, and the above coefficient is generally used.

The spectrum tristimulus value normalization unit 630 uses the spectrum tristimulus values calculated by the equation (3) or (4) to determine the spectrum tristimulus values (Xi, Y) of the i-th discrimination target circular window.
i, Zi) is normalized by the following equation to obtain a normalized tristimulus value (xi, y
i, zi).

[0037]

(Equation 4)

The discrimination unit 640 determines whether the color of the i-th discrimination target circular window is red or green based on the normalized tristimulus values (xi, yi, zi) calculated by the equation (5). Identify using a chromaticity diagram.

FIG. 7 shows an xy chromaticity diagram of CIE used by the identifying unit 640 in FIG. 6 for color identification. Identification unit 6
40 is a normalized tristimulus value (xi, y) converted by the spectrum tristimulus value normalization unit 630 with respect to the i-th identification target circular window.
From the values of xi and yi of (i, zi), red or green is identified depending on the position in the color space of the xy chromaticity diagram in which xi is associated with the x-axis 632 and yi is associated with the y-axis 634. The boundary of color identification is a straight line 636 connecting 0 and white (x = y = 1/3).
If the lower right of the line 636 is red, the upper left is green.

FIG. 8 shows the processing contents for checking whether or not the color of the discrimination result in the discrimination result check unit 700 is correct. For the color of each circular window of the drum water level gauge identified by the color identification unit 600, the color alignment state of the entire circular window of one drum water level gauge is comprehensively determined and checked. As an example of the arrangement of the colors of the circular windows of the drum water level gauge, an example in which the upper portion is red and the lower portion is green is basically described, and processing is performed by removing the impossibility of the circular window identified by the color identifying unit 600. I shall.

First, in step 710, it is checked whether or not the color of the first circular window is red. If it is not red, that is, green, in step 720, the colors of the second and subsequent circular windows are all green. If it is all green, the color of the series of circular windows is all green. Therefore, in step 760, it is determined that the color identification result of the series of circular windows is correct.

On the other hand, when it is not green in step 720, that is, when red is present and the color of the series of circular windows is in the order of green → red, the color of the series of circular windows is calculated in step 750. It is judged that the identification result is incorrect and invalid.

If it is judged to be red in step 710, it is checked in step 730 whether or not there is a circular window which changes to green in the second and subsequent steps. If it does not change to green in step 760, that is, a series of It is determined that the color identification result is correct when the color arrangement of the circular windows is all red. Further step 730
If it is determined that the color changes to green in step 740, it is checked in step 740 whether all the colors after the change to green are also green.
If all are green, in step 760, it is determined that the color identification result is correct because the series of circular windows has a color sequence of red → green.

On the other hand, if all the colors after changing to green in step 740 are not green, that is, since green and red are mixed, it is determined in step 770 that the color discrimination result of a series of circular windows is incorrect and invalid. .

In this way, when the color arrangement of the series of circular windows of one drum water level gauge is all red or all green, or in the order of red → green, color identification is performed. Be correct.

FIG. 9 shows an example in which the color identification results of three drum water level gauges (for example, low pressure, medium pressure, and high pressure) each having seven circular windows are combined on one screen and displayed on the display device 900. Is shown.

The result output unit 800, when the identification in the identification result check unit 700 is correct, determines the color of each identification target circular window as
For example, if the identification result of the first circular window of the low-pressure drum water level meter 910 is red, red 911 is displayed, and if the identification result of the fourth circular window is green, green 912 is displayed, and the drum water level indicator is displayed. The video signal and so on are also displayed by being superimposed on the screen of the display device 900. The identification result may be an identification color or the like instead of the character.

On the other hand, when the color identification determination check unit 500 determines that the color is not identifiable, the result that the color identification is not performed and the identification cannot be performed is displayed, for example, on the second circular window of the medium pressure drum water gauge 920. "Impossible" if the identification result is impossible 9
21 is displayed, and the video signal is displayed in a superimposed manner on the screen of the display device 900.

If the identification result check unit 700 does not identify correctly, the identification result is incorrect. For example, if the identification of the high-pressure drum water level meter 930 is incorrect, the entire circular window is colored. "Identification error" 931 is displayed, and the video signal is displayed in a superimposed manner on the screen of the display device 900.

[0050]

According to the present invention, whether the color of each circular window of the drum water level gauge is red or green is identified at high speed, and the result is displayed in the center. Even if they are installed in a distributed manner, the equipment status can be instantly grasped at one location in the center, which can reduce the burden on the observing staff, and oversight due to fatigue and the water level of the drum level gauge can be changed at high speed. Even if you can prevent overlooking,
It is possible to minimize equipment abnormalities and breakdowns.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a color identification device for a drum water gauge according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a setting area including the entire circular window of the drum water level meter preset by a color identification area setting unit in FIG.

FIG. 3 is an explanatory diagram showing an example of a range in which a color signal luminance calculation unit in FIG. 1 calculates an average luminance of each color signal component for each circular window of a drum water gauge.

FIG. 4 is a block diagram showing a specific configuration of a color signal luminance calculation unit in FIG.

FIG. 5 is an explanatory diagram showing a determinable range of luminance of red and green colors of a color identification determination check unit in FIG.

FIG. 6 is a block diagram showing a specific configuration of a color identification section in FIG.

FIG. 7 is a diagram showing an xy chromaticity diagram of CIE used for color identification by the identification unit in FIG. 6;

8 is a flowchart showing the processing contents of an identification result check unit in FIG.

9 is a display example showing the color identification result of each circular window of a plurality of drum water level gauges by the display device in FIG. 1. FIG.

[Explanation of symbols]

 10 ITV camera 100 color signal separation unit 200 A / D conversion unit 300 color signal luminance calculation unit 310 red average luminance calculation unit 320 green average luminance calculation unit 330 blue average luminance calculation unit 340 luminance calculation unit 400 color identification area setting unit 450 drum Water level meter 460 Area including the whole circular window 460a Circular window 460b Circular window 460c Circular window 500 Color discrimination judgment check section 600 Color discrimination section 610 Signal system conversion section 620 Spectral tristimulus value calculation section 630 Spectral tristimulus value normalization section 640 Discrimination Part 700 Identification result check part 800 Result output part 900 Display device 910 Low pressure drum water level meter 920 Medium pressure drum water level meter 930 High pressure drum water level meter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Ozawa 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Hideo Nakamura 3-chome, Saiwaicho, Hitachi, Ibaraki No. 1 Stock company Hitachi Ltd. Hitachi factory (72) Inventor Masahiko Kimura 3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture 3-22 Kansai Electric Power Co., Inc. (72) Toru Kuwahara Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture 3-3-22 Kansai Electric Power Co., Inc.

Claims (4)

[Claims] 1. An image pickup means for picking up a color image signal by photographing a drum water level gauge having a plurality of circular windows for identifying the water level of equipment, and color image signals obtained from the image pickup means in red and green. And blue color signal separating means for separating each color component, A / D converting means for A / D converting the color signal separated by the color signal separating means, and each color signal separated by the color signal separating means. A color identification area setting means for setting an image area including each circular window of the drum water level gauge as an image area to be identified, and an identification luminance of each color signal separated by the color signal separation means by the color identification area setting means. Color signal luminance calculation means for calculating the set image area, and color discrimination determination check means for determining whether or not the luminance of each color signal calculated by the color signal luminance calculation means is within a distinguishable range If the luminance is discriminable by the color discrimination judgment checking means, the color discrimination means for discriminating the color of the color signal, and whether or not the color discriminated by the color discrimination means is correct is checked. Identification result check means, output content when the color identification determination check means cannot identify, output result of the identification result of the color identification means and check result of the identification result check means, and output content of the output means And a display unit for displaying the color identification device of the drum water level gauge. 2. The color signal brightness calculating means calculates an average brightness for each of the red, green and blue color signals separated by the color signal separating means for the image area set by the color identification area setting means. The color identification determination check means, the brightness of each color signal is determined by whether the brightness calculated based on the average brightness of the red, green and blue color signals calculated by the color signal brightness calculation means is within a predetermined range. The color identification device for a drum level gauge according to claim 1, wherein it is determined whether or not the identification is possible. 3. The color discriminating means uses the average luminances of the red, green and blue color signals calculated by the color signal luminance calculating means to calculate spectrum tristimulus values (Xi, Y) of red, green and blue.
i, Zi) and normalize the spectrum tristimulus values to obtain a normalized tristimulus value (xi, yi, zi),
3. The drum water level gauge according to claim 1, wherein color discrimination is performed depending on where in the color space of the xy chromaticity diagram of the CIE the value of (xi, yi) of the stimulus value is. Color identification device. 4. The identification result checking means checks the correctness of the color of each circular window based on the state of the color arrangement of red or green corresponding to each circular window of the identified drum water level gauge. The color identification device for the water surface diameter of a drum according to claim 1.