JPH07306666A - Monitor - Google Patents

Abstract

PURPOSE:To provide a monitor that can make the specified part of an imaged of interest to be easily observed by changing the input level ratio of three primary color signal to a display driving means by a control means on the basis of the detection output of a detecting means on the determination of a luminance signal on a level in a specific range. CONSTITUTION:A luminance signal obtained by a black-and-white monitoring/ inspecting camera is inputted to an input terminal 1 and supplied to a signal processing means 2 and a detecting means 5. The signal processing means 2 converts the inputted luminance signal into three primary color signals of the same level. When a luminance level in a specific range is determined to a determining means 6 by adjusting a low level EL and a high level EH according to the information on the specific part of an image that an observer wants to observe, the detecting means 5 outputs the detected result of the luminance signal on the level in the specific range to a control means 7. In the case of the luminance signal on the level in the specific range, the control means 7 controls attenuators 72R, 72G, 72B so that three primary color signals respectively on different levels are supplied to a display driving means 4 from the signal processing means 2 through transmission lines 8R, 8G, 8B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor device suitable for use in combination with, for example, an industrial black-and-white monitoring camera, a black-and-white inspection camera, and an infrared camera for temperature measurement.

[0002]

2. Description of the Related Art Today, commercial cameras are used as input devices for video information equipment, as shown in FIG. 5, as video tape recorder integrated cameras for producing video software, industrial surveillance and inspection cameras, and medical cameras. Its application fields are extremely diverse, such as endoscopic cameras and video conferencing systems for communication. In particular, the fields of application of cameras for monitoring and inspection in the above industrial fields are extremely diverse. In this case, a black-and-white camera method, a complementary color single plate method, or the like is mainly used as an imaging method.

Here, in monitoring and inspection cameras (hereinafter referred to as black-and-white monitoring / inspection cameras) to which the above-mentioned monochrome camera system is applied, there is a tendency for colorization due to improvement in color image processing technology. That is, when an image based on the luminance signal obtained by the black-and-white monitoring / inspection camera is displayed on a monitor device having a color display section, the luminance signal is artificially colored according to the level of the color image. There is a tendency that the so-called pseudo color display is performed by colorizing the color display on the color display unit.

The pseudo color display will be described in detail. The pseudo color display is a level slice of the luminance signal, which is quantized in a plurality of stages, and each color is displayed in a different color. By performing this pseudo-color display, it is easy to identify and judge the image information having a small difference in brightness. Therefore, the pseudo color display is widely applied in the fields of medical images, X-ray images, infrared images and the like.

Applying the pseudo color display as described above,
For example, in a monitor device (hereinafter, referred to as an infrared thermometer monitor device) for observing temperature radiation of an object such as a human body or a ground surface to which an infrared image is applied, the level of an input luminance signal represents the temperature of the target. Therefore, a level that gives a sensation of low temperature to high temperature such as blue to red is used. In addition, a rainbow pattern of red, orange, yellow, green, blue, indigo, and purple is often used in order to clearly indicate the level of the brightness signal as much as possible, that is, the temperature difference as a change in color.

[0006]

In the infrared thermometer monitor device as described above, it may be desired to focus only on a specific temperature depending on the purpose. However, since the infrared thermometer monitor device is colored on the entire screen according to the temperature distribution, it may be rather difficult to see. Or, for example, in an industrial black-and-white monitoring / inspection camera to which the pseudo-color display as described above is not applied, when trying to monitor a certain work, the black-and-white display is made on the display unit of the monitor device. In some cases, it was difficult to see the monitoring point.

Therefore, the present invention has been made in view of the above-mentioned conventional circumstances, and has the following objects.

That is, it is an object of the present invention to provide a monitor device which makes it easy to see a specific portion of an image of interest.

[0009]

In order to solve the above problems, a monitor apparatus according to the present invention converts a luminance signal input through an input terminal into three primary color signals of the same level by a signal processing means. A monitor device for driving a color display means by a display drive means in accordance with the three primary color signals, the detecting means detecting a luminance signal of a level within a specific range from a luminance signal input through the input terminal; Determining means for determining the level of a specific range of the luminance signal detected by the means, and control means for changing the input level ratio of the three primary color signals to the display driving means based on the detection output of the detecting means. Characterize.

Further, the monitor device according to the present invention is characterized in that the control means prohibits input of two primary color signals of the three primary color signals to the display drive means.

Further, the monitor device according to the present invention is characterized in that the control means prohibits input of one primary color signal of the three primary color signals to the display drive means.

[0012]

In the monitor device according to the present invention, the detecting means detects the luminance signal of the level within the specific range from the luminance signal input through the input terminal. The determining means determines the level of the specific range of the luminance signal detected by the detecting means. The control means changes the input level ratio of the three primary color signals to the display drive means based on the detection output of the detection means.

Further, in the monitor device according to the present invention, the control means prohibits the input of the two primary color signals of the three primary color signals to the display drive means.

Further, in the monitor device according to the present invention, the control means prohibits input of one primary color signal of the three primary color signals to the display drive means.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, a monitor device according to the first embodiment of the present invention will be described.

The monitor apparatus according to the first embodiment of the present invention shown in FIG. 1 has an input terminal 1 to which a luminance signal is input and the luminance signal having the same level of R (red), G (green), B
The signal processing means 2 for converting the signals into the three primary color signals of (blue) and the display device include, for example, a color LCD (liquid).
a color display means 3 having a crystal display, and a display drive means 4 for driving the color display means 3 according to the three primary color signals from the signal processing means 2.
Detecting means 5 for detecting a brightness signal having a level within a specific range from the brightness signal input through the input terminal 1, and determining means 6 for determining a level within a specific range of the brightness signal detected by the detecting means 5. , And control means 7 for changing the input level ratio of the three primary color signals to the display drive means 4 based on the detection output of the detection means 5.

Although not shown in the drawing, the determining means 6 is
Information about a specific portion of an image that the observer wants to pay attention to, for example, information such as a specific temperature in the infrared thermometer monitor device described above is input. Since the target temperature can be represented as a brightness level, the determining means 6 determines the brightness level of the specific range by adjusting the low level El and the high level Eh based on the input information. The low level El and the high level Eh of the brightness level of the determined specific range are supplied to the detection means 5.

The detecting means 5 includes a detector 51 for detecting a luminance signal having a level within a specific range determined by the determining means 6 from the luminance signal input through the input terminal 1, and an AND gate 42. It is configured. The detector 51
Is based on the low level El and the high level Eh from the determining means 6, as shown in FIG.
The low level El from the luminance signal input via
Also, the luminance signal of the high level Eh is detected, and the detection results of the low level El and the high level Eh are output to the AND gate 52.

Specifically, when the low-level El luminance signal is detected, the low-level El detection result is output to the AND gate 52 as a HIGH-level signal, and the low-level El luminance signal is output. If not detected, the detection result of the low level El is output to the AND gate 52 as a LOW level signal. The detection output of the high level Eh is also output to the AND gate 52 as a HIGH level signal or a LOW level signal in the same manner as the detection output of the low level El.

As a result, the AND gate 52 detects that the detection result of the low level El from the detector 51 is HIG.
When the signal of H level and the detection result of the high level Eh are also the signals of HIGH level, that is, the input terminal 1
When a brightness signal having a level in a specific range is detected from the brightness signal input via the, the control unit 7 outputs a HIGH level signal. In addition, the AND gate 52 detects the low level El from the detector 51, and
When one of the detection results of the high level El is a LOW level signal, that is, when a luminance signal of a specific range level is not detected from the luminance signal input via the input terminal 1, Control means 7 for LOW level signal
Output to.

Next, the signal processing means 2 and the display driving means 4 are connected by transmission lines 8R, 8G and 8B. The transmission line 8R is for transmitting the R (red) signals of the three primary color signals output by the signal processing means 2 to the display driving means 4, and similarly, the transmission line 8G is G
The (green) signal and the B (blue) signal are transmitted through the transmission line 8B.

The control means 7 also includes attenuators 72R, 72R.
G, 72B, and a control unit 71 for controlling the amount of attenuation in each of the attenuators 72R, 72G, 72B. The attenuators 72R, 72G, 72B are the transmission lines 8R, 8
Correspondingly provided on G and 8B

That is, when the detected output from the detecting means 5 is a HIGH level signal, the control section 71 determines that the input level ratio of the three primary color signals to the signal processing means 2 and the display driving means 4 is high. , The attenuators 72R, 72G and 72B are controlled so as to have a certain specific ratio. For example, in this case, the control unit 71 controls the attenuators 72R and 7R so that the input level ratio of the three primary color signals becomes 1: 0.5: 0.5.
Controls the amount of attenuation in 2G and 72B. The attenuator 7
The 2R, 72G, and 72B respectively attenuate the levels of the three primary color signals according to the attenuation amount controlled by the control unit 71.

Further, the control section 71 has the detecting means 5
If the detection output from is a LOW level signal, the attenuators 72R, 72G, 72G, 72G, 72G, so that the input level ratios of the three primary color signals become equal, that is, 1: 1: 1.
Controls the amount of attenuation at 72B. The attenuator 72R,
72G and 72B respectively attenuate the levels of the three primary color signals according to the attenuation amount controlled by the control unit 71.

Therefore, when the luminance signal in the specific range is detected, the three primary color signals having different input levels are respectively supplied to the display driving means 4 via the transmission lines 8R, 8G, 8B. When the luminance signal in the specific range is not detected, the three primary color signals having the same input level are supplied to the display driving means 4 via the transmission lines 8R, 8G, 8B.

As described above, for example, as shown in FIG. 3, the image of the specific portion 102 of the screen 100 of the color display means 3 to be noticed is displayed in a specific color corresponding to the input level ratio, and the specific portion is displayed. The part 101 other than 102 is displayed in black and white.

The operation of the monitor device configured as described above will be described.

The luminance signal obtained by the black and white surveillance / inspection camera is input to the input terminal 1, and the luminance signal is supplied to the signal processing means 2 and the detection means 5, respectively.

The signal processing means 2 converts the luminance signal input through the input terminal 1 into three primary color signals of the same level,
That is, it is converted into an R (red) signal, a G (green) signal, and a B (blue) signal. Then, the signal processing means 2 outputs an R (red) signal, a G (green) signal and a B (blue) signal.

Here, when the information of the specific portion of the image to be noted is not inputted to the determining means 6, the determining means 6
Does not determine the brightness level of the specific range, the detection means 5 outputs a LOW level signal to the control means 7.
As a result, the control unit 71 of the control unit 7 causes the attenuators 72R, 72G, 72B so that the input level ratios of the three primary color signals to the signal processing unit 2 and the display driving unit 4 become the same level.
To control.

Therefore, the signal processing means 2 outputs an R (red) signal, a G (green) signal and a B (blue) signal of the same level, respectively. Then, the R (red) signal, the G (green) signal and the B (blue) signal are respectively supplied to the display driving means 4 via the transmission line 8R, the transmission line 8G and the transmission line 8B.

The display driving means 4 drives the color display means 3 by the R (red) signal, G (green) signal and B (blue) signal from the signal processing means 2. Therefore, the display screen of the color display means 3 is displayed in black and white.

Next, when the information of the specific portion of the image to be noted is input to the determining means 6, the determining means 6 is selected.
Adjusts the low level El and the high level Eh according to the input information to determine the brightness level of the specific range,
The low level El and the high level Eh of the brightness level of the determined specific range are supplied to the detection means 5.

The detecting means 5 detects the low level El and the high level Eh of the brightness level of the specific range determined by the determining means 6 from the brightness signal input through the input terminal 1, The detection result of the luminance signal of the level in the specific range is output to the control means 7.

Based on the detection result of the detection means 5, the control portion 71 of the control means 7 controls the input level ratio of the three primary color signals to the signal processing means 2 and the display drive means 4 in the case of a luminance signal having a level within a specific range. , Controls the attenuators 72R, 72G, 72B so as to have a certain specific ratio, and in the case of a luminance signal of a level outside the specific range, inputs the three primary color signals to the signal processing means 2 and the display driving means 4. The attenuators 72R, 72G and 72B are controlled so that the level ratios become the same level.

Therefore, in the case of a luminance signal of a level within a specific range, the signal processing means 2 supplies the three primary color signals of different levels to the display driving means 4 via the transmission lines 8R, 8G, 8B. . Further, in the case of a luminance signal of a level outside the specific range, the signal processing means 2 supplies the three primary color signals of the same level to the display driving means 4 via the transmission lines 8R, 8G, 8B.

The display driving means 4 drives the color display means 3 according to the three primary color signals from the signal processing means 2. Therefore, on the display screen of the color display means 3, a specific portion is displayed in a color corresponding to the level ratio of the three primary color signals, and a portion other than the specific portion is displayed in black and white.

As described above, it is possible to make it easy to see a specific portion of an image to be noticed by coloring at an arbitrary brightness level.

In the first embodiment, the attenuators 72R, 72G and 72B of the control means 7 are used to change the input level ratio of the three primary color signals under the control of the control unit 71. Instead of using the attenuators 72R, 72G, 72B, the control unit 71 may control the signal processing means 2 to change the input level ratio of the three primary color signals.

Next, a monitor device according to the second embodiment of the present invention will be described. The same components as those of the monitor device according to the first embodiment of the present invention shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In the monitor device according to the first embodiment described above, the control unit 71 in the control means 7 shown in FIG.
The attenuators 72R, 72G, and 72B are controlled by the above to change the input level ratio of the three primary color signals input to the display drive means 4, but the monitor device according to the second embodiment is
Under the control of the control unit 71, for example, the input of the two primary color signals of the G (green) signal and the B (blue) signal among the three primary color signals to the display driving means 4 is prohibited.

That is, in the monitor device according to the second embodiment, as shown in FIG. 4, the control means 7 is provided on the transmission line 8G instead of the attenuators 72R, 72G and 72B shown in FIG. It has a switch SWG provided and a switch SWB provided on the transmission line 8B. The switch SWG and the switch SWB are turned on by the control unit 71.
It can be switched to N or OFF.

That is, the control section 71 turns off the switch SWG and the switch SWB when the detection output from the detecting means 5 is a HIGH level signal.
When the detection output from the detection means 5 is a LOW level signal, the switches SWG and SWB are controlled to be in the ON state.

In other words, when the luminance signal in the specific range is detected, the switches SWG and SWB are turned off, and only the R (red) signal of the three primary color signals from the signal processing means 2 is transmitted through the transmission line. It is supplied to the display drive means 4 via 8R. When the luminance signal in the specific range is not detected, the switch S
The WG and the switch SWB are turned on, and all the three primary color signals from the signal processing means 2, that is, the R (red) signal is transmitted through the transmission line 8R, the G (green) signal is transmitted through the transmission line 8G, and the B ( The blue signal is supplied to the display driving means 4 via the transmission line 8B.

Therefore, in this case, the specific portion 102 of the screen 100 of the color display means 3 shown in FIG.
Image is displayed in red, and the portion of the portion 101 other than the specific portion 102 is displayed in black and white.

As described above, it is possible to make it easy to see a specific portion of an image to be noticed by applying a color to an arbitrary brightness level.

In the monitor device according to the second embodiment described above, in the control means 7, the control section 71 prohibits the input of the two primary color signals of the three primary color signals to the display drive means 4. However, any one of the three primary color signals
The input of one primary color signal to the display driving means 4 may be prohibited.

In the first and second embodiments described above, the information input to the determining means 6 is the specific temperature to be noticed. For example, in an industrial monochrome camera to which the monitor device is applied. When observing a certain work, a portion serving as a monitoring point may be illuminated and the information of the luminance level may be input to the determining means 6.

In the first and second embodiments described above, the luminance signal obtained by the black-and-white surveillance / inspection camera is input to the input terminal 1. However, the luminance signal obtained by the infrared camera is used. May be input.

[0051]

In the monitor device according to the present invention, the detecting means detects the luminance signal of the level in the specific range from the luminance signal input through the input terminal. The determining means determines the level of the specific range of the luminance signal detected by the detecting means. The control means changes the input level ratio of the three primary color signals to the display drive means based on the detection output of the detection means. As a result, on the color display means, the specific portion is displayed in a color corresponding to the input level ratio of the three primary color signals to the display driving means, and the portion other than the specific portion is displayed in black and white. Therefore, it is possible to make it easy to see a specific portion of an image to be noticed by applying a color to an arbitrary brightness level.

Further, in the monitor device according to the present invention, the control means prohibits the input of the two primary color signals of the three primary color signals to the display drive means. As a result, the specific portion is displayed on the color display means in the color of the primary color signal whose input to the display driving means is not prohibited, and the portion other than the specific portion is displayed in black and white. Therefore, it is possible to make it easy to see a specific portion of an image to be noticed by applying a color to an arbitrary brightness level.

Further, in the monitor device according to the present invention, the control means prohibits input of one primary color signal of the three primary color signals to the display drive means. As a result, the specific portion is displayed on the color display means in a mixed color of the two primary color signals whose input to the display drive means is not prohibited,
Parts other than the specific part are displayed in black and white. Therefore, it is possible to make it easy to see a specific portion of an image to be noticed by applying a color to an arbitrary brightness level.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a monitor device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining an operation when detecting a luminance signal having a level in a specific range.

FIG. 3 is a diagram showing a state of a screen displayed on a color display means of the monitor device shown in FIG.

FIG. 4 is a diagram showing a configuration of a monitor device according to a second embodiment of the present invention.

FIG. 5 is a diagram for explaining an image pickup method of an industrial camera and an application field.

[Explanation of symbols]

 1 Input Terminal 2 Signal Processing Means 3 Color Display Means 4 Display Driving Means 5 Detecting Means 6 Detecting Means 7 Control Means 71 Control Means 8R, 8G, 8B Transmission Lines 72R, 72G, 72B Attenuators SWG, SWB Switches

Claims (3)

[Claims] 1. A monitor device in which a luminance signal input through an input terminal is converted into three primary color signals of the same level by a signal processing means, and a color display means is driven by a display drive means in accordance with the three primary color signals. Detecting means for detecting a luminance signal having a level within a specific range from the luminance signal input through the input terminal; determining means for determining a level within a specific range of the luminance signal detected by the detecting means; Control means for changing the input level ratio of the three primary color signals to the display drive means based on the detection output of the monitor means. 2. The monitor device according to claim 1, wherein the control means prohibits input of two primary color signals of the three primary color signals to the display drive means. 3. The monitor device according to claim 1, wherein the control means prohibits input of one primary color signal of the three primary color signals to the display drive means.