JPS59228137A - Infrared-ray picture displaying device - Google Patents

Abstract

PURPOSE:To regenerate the shape of an object and the like together with a temperature distribution color display, by displaying a picture by the composite signal of a multiplex luminance signal and a temperature distribution hue dispaly signal of an infrared ray picture, so that adverse effects are not imparted to the hue display of a temperature distribution area. CONSTITUTION:Three-primary-color signals corresponding to the absolute temperature of a radiation image from a body to be measured are inputted to a temperature luminance-signal generating circuit 4 and a temperature color-difference-signal generating circuit 9 through terminals 1-3. The output from the temperature luminance-signal generating circuit 4 is inputted to an adder circuit 7 and added to a contour signal from a contour signal extracting circuit 6. The output from the temperature color-difference-signal generating circuit 9 is inputted to an adder circuit 12 through modulating circuits 10 and 11. The outputs of the adder circuits 7 and 12 are further added in an adder circuit 13, and the result is supplied to a display device 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an infrared image display device that displays an infrared image emitted according to the temperature of a subject as a color image with a hue corresponding to the temperature.

Conventional Structure and Problems There is known an infrared image display device that displays an infrared image from an object in color by specifying hues for each predetermined temperature level. This infrared image is different from the visible image of the subject that we see with our eyes, so when only the infrared image is displayed, it is often difficult to tell whether the subject is a real person.

Furthermore, an infrared brightness image for temperature distribution reproduction has extremely low resolution compared to a general visible image, and it is difficult to decipher the temperature distribution range when the temperature difference between the objects to be measured is small.

In order to eliminate such drawbacks, Japanese Patent Application Laid-Open No. 51-242
As seen in Japanese Patent Application No. 18, a method has been proposed in which infrared reproduced images are displayed in color according to temperature levels in advance, and visible images are multiplexed thereon.

However, with this method, it may be difficult to accurately display the hue of temperature distribution regardless of the contrast strength of the visible image.

For example, even if the surface of the object to be measured has a uniform temperature, if there are white and black parts on the surface, the hue display may be one color, but the result of adding black and white images obtained with a visible camera will be the brightness signal within the uniform temperature distribution area. Due to the time difference, the pigment will not be displayed correctly. Color is expressed by combining hue and brightness, so if the hue is selected into more than a dozen color categories, even a slight deviation in brightness will result in a reading error.

Purpose of the Invention The present invention provides an infrared image display device that can simultaneously display the positional relationship of an infrared image with a visible light image and the shape of an object to be measured without adversely affecting temperature distribution color display. .

Components of the Invention The present invention provides a combination of a low-frequency region component of a luminance signal of an infrared image signal emitted from an object to be measured and a high-frequency region component or outline signal component of a visible image or near-infrared region image of the object to be measured. an infrared image configured to display an image by combining a signal formed by the sum of the signals and a signal obtained by converting a signal obtained by adding the high frequency region component or the contour line signal component to the temperature distribution hue display signal of the infrared image into a color difference signal. It is a display device.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a circuit for generating visible image contours in a thermal image according to the present invention.

In Figure 1, 1, 2. and 3 are three primary color signal input terminals of red, green, and blue (hereinafter referred to as RGB) for displaying an infrared image emitted from the object to be measured in a predetermined hue corresponding to the absolute temperature; 1 is R, 2 is is a G signal input terminal, and 3 is a B signal input terminal. These input signals are applied to a temperature-based luminance signal generation circuit 4 and a temperature-based color difference signal generation circuit 9. The output of the temperature-based luminance signal generation circuit 4 is a temperature-based luminance signal whose band is limited to about 2 MH2 or less, which is obtained by performing matrix calculations on the R, G, and B input signals in accordance with the visible luminance signal.

On the other hand, 5 is a thermal image signal input terminal in the visible light region obtained by imaging the object to be measured with a visible camera or in the near-infrared light region obtained by imaging it with an infrared imaging camera.

The input signal applied to this input terminal is approximately 2MHz to 3M
The high frequency components (approximately 2 MHz to s
MHz) or visible light image contour signal components are extracted. This signal component is added together with the output of the temperature-based brightness signal generation circuit 4 in an adder circuit 7 to create a multiplex brightness signal, which is applied to one input terminal of the adder circuit 13.

The output of the bandpass filter or contour signal extraction circuit 6 is further added to the R, G, and B signals at the input side of a color difference signal generation circuit 90, and the color difference signal generation circuit 9 generates RY.

It is converted into a B-Y color difference signal. These color difference signals are converted into a 3.58MH2 carrier wave by ±500K using a modulator 10.11.
Hz range, summed in a summing circuit 12 and applied to the other input terminal of an summing circuit 13, and summed with the multiple luminance signal to provide a temperature signal to a display device 14, such as a color television set. Outputs a distributed color display composite signal. The obtained composite signal spectrum is shown in FIG. In FIG. 2, 21 is a temperature-based luminance signal that is the output of the temperature-based luminance signal generation circuit 4, 22 is a high frequency component or contour signal component that is the output of the bandpass filter or contour signal extraction circuit 6,
The sum of these signals 21 and 22 is the multiple luminance signal that is the output of the adder circuit 7. Further, 23 is a modulated color difference signal.

The composite signal obtained in this way has a luminance signal and a contour signal in the low frequency range, and a hue signal using 3.58 MH2 as a carrier wave, so it is a signal based on a normal color television digital composite signal. With this configuration, an infrared image can be displayed as a hue display image accompanied by a contour signal on a color television receiver.

Effects of the Invention As described above, the present invention provides a combination of the low frequency region component of the luminance signal of the infrared image signal emitted from the object to be measured and the high frequency region component or contour line of the visible image or near-infrared light region image of the object to be measured. This is an infrared image display device that displays an image using a composite signal of a multiple luminance signal composed of the sum of shape signals and a temperature distribution hue display signal of an infrared image. , the positional relationship with surrounding objects, etc. can be reproduced along with temperature distribution color display.

Additionally, you can use your existing video system as is.
Recording and reproducing of output signals is easy, and data analysis is also easy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall structure of an infrared image display device according to the present invention, and FIG. 2 is a composite signal spectrum diagram obtained according to the present invention. 1183. R signal input terminal, 2...G signal input terminal, 3...B signal input terminal, 4...
Temperature-based luminance signal generation circuit, 6... Visible camera video signal input terminal, 6... Contour signal extraction circuit, 7.
...Addition circuit, 9...°゛. Color difference signal generation circuit, 10.11...Modulator, 1
2.13...addition circuit, 14...display device. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Amendment to figure procedure February 1980 2c1 To the Commissioner of the Japan Patent Office 2 Name of the invention Infrared image display device 3 Mediation with the case of the person making the amendment Patent application Person 1006 Kadoma, Kadoma City, Osaka Prefecture Name ( 582) Representative of Matsushita Electric Industrial Co., Ltd.
Toshihiko Yamashita 4 Agent 571 Address 6, Matsushita Electric Industrial Co., Ltd., 1006 Oaza Kadoma, Kadoma City, Osaka Contents of amendment (1) The entire statement of the specification will be amended as shown in the attached document 0 (2)
Figures 1 and 2 of the drawings will be corrected as shown in the attached sheet. (3) Add Figure 3 of the drawing as attached.
Specification 1, Title of the invention Infrared image display device 2, Claims Infrared image signal o<h frequency component emitted from the object to be measured and visible image or direct image in near-infrared light region of the object to be measured. An infrared image display device 03, characterized in that an image is displayed using a composite signal of a multiple luminance signal consisting of the sum of a high frequency component or a contour line signal, and a temperature distribution hue display encapsulation signal of an infrared image. Detailed Description of the Invention Industrial Field of Application The present invention relates to an infrared image display (infrared image display) in which an infrared image emitted according to the temperature of an object is converted into a color image with a hue corresponding to the temperature, and an object contour image is superimposed and displayed. output) device. Conventional Structure and Problems There is known an infrared image display device that displays an infrared image from an object in color by specifying hues for each predetermined temperature level. This infrared image is different from the visible image that we see of the subject, so it is often difficult to understand what the subject is when only the infrared image is displayed.In addition, infrared brightness for temperature distribution reproduction The resolution of the image is extremely poor compared to general visible images, and it is difficult to decipher the temperature distribution range when the temperature difference between the objects to be measured is small. In order to eliminate such drawbacks, Japanese Patent Application Laid-Open No. 51-242
As seen in Japanese Patent Application No. 18, a method has been proposed in which infrared reproduced images are displayed in color according to temperature levels in advance, and visible images are multiplexed thereon. However, with this method, it may be difficult to accurately display the hue of temperature distribution regardless of the contrast strength of the visible image. For example, even if the surface of the object to be measured has a uniform temperature, if there are white and black parts on the surface, the hue display may be one color, but the result of adding black and white images obtained with a visible camera will be the brightness signal within the uniform temperature distribution area. This will cause an error and the pigment will not be displayed correctly. Color is expressed by combining hue and brightness, so if the hue is selected into more than a dozen color categories, even a slight deviation in brightness will result in a reading error. OBJECTS OF THE INVENTION The present invention provides an infrared image display device that can simultaneously display the positional relationship of an infrared image with a visible light image and the shape of an object to be measured without adversely affecting temperature distribution color display. Components of the Invention The present invention provides a combination of a low-frequency region component of a luminance signal of an infrared image signal emitted from an object to be measured and a high-frequency region component or outline signal component of a visible image or near-infrared region image of the object to be measured. Let the signal composed of the sum be the luminance signal. In addition, red, blue, and green (hereinafter referred to as RBG signals) signals for displaying hues in order of brightness are created from the infrared image, and (R-Y), (
B-Y) is converted into a color difference signal, and after band limiting, this is converted into a signal modulated by a carrier frequency amount and transmitted and output as an infrared image composite signal that is added to the infrared luminance signal of the contour signal addition. . DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 shows a temperature distribution color display composite signal generation circuit based on the present invention, which is composed of a temperature-based luminance signal in which a visible image outline is multiplexed on a thermal image, and a color modulation signal that displays temperature by hue. It is a block diagram. In Figure 1, 1, 2. and 3 are RGB three primary color code input terminals for displaying the infrared image emitted from the object to be measured in a predetermined hue corresponding to the absolute temperature; 1 is R, 2 is G, and 3 is B. This is a signal input terminal. These input signals are applied to a temperature-based luminance signal generation circuit 4 and a temperature-based color difference signal generation circuit 9. The output of the temperature-based luminance signal generation circuit 4 outputs the RlG and B input signals according to the visible luminance signal.)
This is a temperature-based luminance signal whose band is limited to about 2M or less by IJ Nox calculation. On the other hand, 6 is a thermal image signal input terminal in the visible light region obtained by imaging the object to be measured with a visible camera or in the near-infrared light region obtained by imaging the object with an infrared imaging camera. The input signal applied to this input terminal is passed through a high frequency band filter that extracts about 2 to 3 components or a circuit 6 that extracts the horizontal and vertical contours of the visible light image to generate a visible light image or near-infrared light region image. High frequency components (approximately 2 to 3 total) or outline signal components of the visible light image are extracted. This signal component is added together with the output of the temperature-based brightness signal generation circuit 4 in an adder circuit 7 to create a multiplex brightness signal, which is applied to one input terminal of the adder circuit 13. Furthermore, R, G, and H signals are applied to the input side of the color difference signal generation circuit 9, and are converted into R-Y and B-Y color difference signals in the color difference signal generation circuit 9. These color difference signals are band-limited to less than 1 total, for example, 3.58 m (7) 1 in the food preparation device 10.11.
Modulated by 9 transmission waves, added by addition circuit 12, and added by addition circuit 1
3 and summed with the contour multiplexed luminance signal to output a temperature distribution color display composite signal to a display device 14, such as a color television receiver having a decoder. The obtained composite signal spectrum is shown in Fig. 2. In Fig. 2, 21 (or 21') is the temperature-based luminance signal that is the output of the temperature-based luminance signal generation circuit 4, and 22 is the bandpass filter size or contour. These signals 21 are high frequency components or contour signal components that are output from the signal extraction circuit 6.
(or 21') and 22 are added to form the multiple luminance signal which is the output of the adding circuit 7. 23 is a modulated color difference signal. The above-mentioned infrared image brightness signal is not a brightness signal created from the RGB signals from the 1.2°3 input terminal in Fig. 1, but a signal obtained by directly adding a visible image contour signal component to the infrared image signal. It may be added directly to FIG. 13. In this case, the circuit configuration shown in FIG. 3 is obtained. The composite signal obtained in this way has a luminance signal and a contour signal in the low frequency range, and a hue signal using 3.5811k as a carrier wave, so it is a signal based on a normal color television composite signal. With this configuration, an infrared image can be displayed as a hue display image accompanied by a contour signal on a general color television receiver having a Tecoater. Effects of the Invention As described above, the present invention provides a combination of the luminance multiplied low frequency region component of the infrared image signal emitted from the object to be measured and the high frequency region component or contour of the visible image or near-infrared light region image of the object to be measured. This is an infrared image display device that displays an image using a composite signal of a multiple luminance signal composed of the sum of linear signals and a temperature distribution hue display signal of an infrared image. The shape, positional relationship with surrounding objects, etc. can be reproduced along with temperature distribution color display. Because you can use the conventional video system as is,
Recording and reproducing of output signals is easy, and data analysis is also easy. 4. Brief Description of the Drawings FIG. 1 is a block diagram showing the overall configuration of an infrared image display device according to another embodiment of the present invention. 1 R signal input terminal, 2...G signal input terminal, 3
-... B signal input terminal, 4... Temperature system luminance signal generation circuit, 5-... Visible camera video signal input terminal, 6... Contour signal extraction circuit, 7... Addition circuit, 9... ...Color difference signal generation circuit, 10.11..., -modulator, 12゜13
...Addition circuit, 14 ...Display device, 15.
...Visible image multiplexed luminance signal.

Claims (1)

[Claims] (1) Multiple luminance consisting of the sum of the low frequency component of the brightness signal of the infrared image signal emitted from the object to be measured and the high frequency component or outline signal of the visible image or near-infrared light region image of the object to be measured An infrared image display device characterized in that an image is displayed using a composite signal of a signal and a temperature distribution hue display signal of an infrared image.