JPS59195134A - thermography equipment - Google Patents

Abstract

PURPOSE:To obtain a thermograph device proper to the diagnosis of neurology by finding the average temperature of each area on the basis of the temperature data of picture elements included in plural areas regulated by frames and then finding and displaying the difference of average temperatures of respective areas. CONSTITUTION:A frame setting circuit 24A is operated to arrange a required frame A in a temperature distribution image Z. At that time, the circuit 24A generates positional data for determining the frame and a frame writing circuit 23 writes a frame pattern in a memory 17. Consequently, the frame A is displayed together with the temperature distribution image on a screen of a display device 11. When the frame A is set up, an intra-frame address setting circuit 25 lists up n picture elements in the frame A, reads out the temperature data of the picture elements from a picture memory 8, finds out an average temperature Ta in an average temperature arithmetic circuit 26, and stores the average temperature Ta in a register 27A. The same processing is applied also to frames B-D. Subtraction circuits 28-31 operate the difference of the average temperatures between the frames. Thus, the difference of the average temperatures between respective frames is displayed on the screen of the device 11.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermography device that obtains a temperature distribution image, and in particular, calculates the average temperature of a plurality of regions set in the temperature distribution image, and calculates the difference in the average humidity. The thermography apparatus is designed to display a temperature distribution image together with a temperature distribution image.

[Prior Art] Recently, attempts have been made to use the symmetry of the temperature distribution of the human body as a guideline in neurological diagnosis. Specifically, it is believed that the left-right asymmetry in the temperature distribution of the human body is caused by abnormalities in the autonomic nerves, and that the temperature difference between the periphery and the center is related to motor nerves.

[Object and Structure of the Invention] The present invention aims to provide a thermography device suitable for use in this diagnosis, and the temperature of the pixels forming the visual field obtained by detecting infrared rays from the subject. means for storing data; reading means for reading temperature data stored in the storage means; display means for displaying a temperature distribution image of the subject based on the read temperature data; means for specifying a plurality of regions; means for reading temperature data of pixels included in the plurality of regions specified by the specifying means from the storage means; The apparatus is characterized in that it comprises means for determining the average temperature and means for determining the difference between the average temperatures of the respective regions, and the difference temperature value is displayed on the screen of the display means. Hereinafter, one embodiment of the present invention will be described in detail based on the attached drawings.

[Example 1] Figure 1 is a block diagram showing an embodiment of the present invention. In the figure, 1 is an infrared detector, and 2 is an infrared detector for forming an image of the detector on a subject and for raster scanning. optical scanner, 3
is a reference black body for inputting reference infrared rays to the detector every time the optical scanner 2 scans horizontally. Infrared rays from the field of view are sequentially incident on the detector 1 based on raster scanning by the optical scanner 2, and the obtained detection signal is sent via an amplifier 4 to a processing circuit 5 having an absolute temperature reproducing circuit, a linearizer, etc. , is converted into a temperature signal corresponding to the absolute temperature of the subject. The temperature signal is converted into a digital signal by an A-D converter 6, and then sent to an image memory 8 via a write control circuit 7 and stored therein.

9 is a temperature fg! that calculates the temperature range to be displayed based on the signal a specifying the center temperature and the signal 1 specifying the temperature range.
A range setting circuit 10 is a readout selection circuit for reading pixel data stored in the image memory 8 and extracting those within the temperature range set by the setting circuit 9, and the extracted pixel data is sent to the monitor. The image is stored in an image memory 12 for displaying a C-type image that falls within the gradation range of the cathode ray tube display device 11. The pixel data stored in the memory 12 is stored in the display device 1.
D
-A converter 13. The signal is sent to the monitor cathode ray tube display device 11 via the level shift circuit 14 and the television signal conversion circuit 15. Further, the character information pattern data stored in the character display memory 16 and the frame pattern data stored in the frame display memory 17 are also read out at the same time.
After being added by the R circuit 18, the level shift circuit 1
4, and in order to increase the brightness only during the period when the pattern exists, the screen of the display device 11 displays a humidity distribution image Z and information regarding the image Z, such as C'T (center temperature), as shown in FIG. , TW (temperature width) value, and rectangular frame A,
B, C, and D are displayed in a superimposed manner.

19 is a synchronization signal generation circuit that generates standard television synchronization signals H and V to be supplied to the television signal conversion circuit 15;
20 generates one raster based on the synchronization signal t1.
A tarlock oscillator generates a pixel clock signal divided into six pixels; 21 is a counter that counts the clock signal and generates a horizontal position designation signal; 22 is the synchronization signal 1-
A callan that counts 1 and generates a vertical position designation signal.
It is.

Data is read out from the memories 12, 16, 17 and sent to the display device 11 based on the horizontal and vertical position designating signals from the two counters.

23 is a frame writing circuit for writing a frame pattern into the frame display memory 17 based on the frame position data from the frame setting circuits 24A, 24B, 24G, and 24D; 25 is a frame surrounded by a frame based on the frame position data; The pixels included in the area are stored in memory 8.
An in-frame address setting circuit 26 sequentially generates an address specifying a corresponding pixel in the memory 8 in order to read it out from within the memory 8; Average temperature calculation circuit for calculating average temperature within a frame based on temperature data, 27A, 2
7B, 27C, and 27D are registers for storing the average temperature within the four frames obtained by the average temperature calculation circuit 26, and 28 to 31 are subtraction circuits for calculating the difference between the average temperature values stored in each register. , 32 to 35 are the subtraction circuits 28
A position calculation circuit calculates the position where the temperature difference obtained in steps 31 to 31 is written on the screen, and 36 is a character writing circuit that writes the character pattern into the character display memory 16.

With the configuration described above, the image menu 8 has a storage area of 256 pixels in the horizontal direction, 240 lines in the vertical direction, and, for example, 12 bits in the depth direction, as shown in FIG. , the temperature data of each pixel obtained by horizontally and vertically scanning the detector image with the optical scanner 2 is A-D.
It is converted into a digital signal by a converter 6 and stored at a corresponding position with a dynamic range of 12 bits. Then, the data is sequentially rewritten with new data every time one screen is scanned. The image display memory 12 also has a storage area of 256×2.40 pixels, just as in FIG. 3, but the depth is 6 bits 1 to 1 (black and white, 64 gradations). Furthermore, a character display memory 16 and a frame display memory 1
7 also has the same <256x2 as shown in Figures 4 and 5.
A storage area for 40 pixels is set, and both memories are 1 bit (2 gradations of white and black) in the depth direction.

Now, the center temperature (CT) is 35°0°C1 due to signal a.
If the temperature range (TW>) is specified as 3.00°C by the signal, the temperature range setting circuit 9
W/2 is calculated and the lower limit temperature (33
, 5°C) and the upper limit temperature (36,5°C).

The readout selection circuit 10 extracts the specified pixels of 33.5°C or more and less than 36.5°C from all the pixels stored in the image menu 8, and selects one pixel within the 3°C temperature range. ~6
The numbers are classified into 62 levels of 2 and stored in image display memory 1.
Write to the corresponding position of 2. Note that II OII (black level) is given to pixels below 33°5°C, and 36.
A value of 63''' (white level) is assigned to pixels whose temperature is 5°C or higher, resulting in a total of 64 gradations.

Further, the character writing circuit 36 controls the character generator based on the signal a specifying the center temperature and the signal A specifying the temperature range, and writes an ICT 35 and an OTW 3. A pattern of letters and numbers OOJ is written, for example, in the form of 5/l dots 1 to 1 as shown in FIG. In this case, since it is sufficient to indicate the presence or absence of a pattern, the memory 16 only needs to have one bit in the depth direction.

The image data and character pattern data written separately in the memories 12 and 16 in this way are simultaneously read out in synchronization with the screen scanning of the display device 11 by horizontal and vertical position designation signals from the counters 21 and 22. The image data therein is sent to the display device 11 via a D-A converter 13 and a conversion circuit 15.
Therefore, a humidity distribution image Z as shown in FIG. 2 is displayed on the screen. Also, the character pattern data is O
The signal is sent to the level shift circuit 14 via the R circuit 18, and when a character pattern exists, the level shift circuit 14 forcibly changes the level of the video signal sent to the TV signal conversion circuit 15 to the white level. To shift, the screen of the display device 11 displays [0 35.0 TW 3.
The letters OOJ are superimposed on the temperature distribution image Z and displayed as shown in FIG.

In the present invention, when the temperature distribution image Z is displayed in this way, a plurality of frames are set in the temperature distribution image, and the temperature data of the pixels included in the plurality of areas defined by the normal frames are set. The system is characterized in that the average temperature of each region is determined by using the method, and the difference between the average temperatures of each region is also determined and displayed.

That is, the operator first operates the frame setting circuit 24A to arrange a desired human-shaped frame A at a desired position in the temperature distribution image Z. At this time, the frame setting circuit 24. A is the 4 points P1 that determine the frame. Position data of P2, P3, P4 (Xl, Vt
>, (Xz, Vt), (Xz.

V2) and (Xl, y2) are generated and sent to the frame writing circuit 23. The frame writing circuit 23 writes in the memory 17 a frame pattern in which the above four points are connected by straight lines, as shown by A in FIG. 5, in accordance with the position data. The frame pattern data written in the memory 17 in this way is read out simultaneously with the above-mentioned image data and character pattern data in synchronization with the screen scanning of the display device 11, and is sent to the level shift circuit 14 via the OR circuit 18. Therefore, the frame A is displayed on the screen of the display device 11 at the set position as shown in FIG. 2 together with the temperature distribution image.

When frame A is set in this way, the frame address setting circuit 25 receives the frame position data (
Xl, Vt ), (Xz, 1/l ).

Based on (Xz, V2), , (Xl, yz), n pixels (D+ to Dn) included in the area surrounded by frame A in image Z
), and address signals for reading the temperature data of the n pixels that have been restored from the image memory 8 are generated in an appropriate order and sent to the image memory 8. The temperature data of n pixels (D+ to Dn) read out from the memory 8 based on the address signal is sent to the average temperature calculation circuit 26.
sent to. The arithmetic circuit 26 integrates n pieces of temperature data and then divides by n to obtain an average temperature Ta, and stores the average temperature Ta within the frame A in the register 27A for the frame A.

Next, the operator operates the frame setting circuit 24B in exactly the same way, and creates a frame having approximately the same shape, shape, and area as frame A at a position symmetrical to frame A with the central axis J of the subject in the temperature distribution image Z in between. Set B. Then, the average temperature calculation circuit 26 also calculates the average temperature If (Tb) in the frame B based on the temperature data of n pixels included in the area surrounded by the frame B, just as in the case of the frame A, and calculates the average temperature If (Tb) in the frame B. Tb is stored in the register 27B for frame B.

Thereafter, in exactly the same manner, by operating the frame setting circuits 24C and 24D, a frame C, which is obtained by vertically shifting the frame A, and a frame symmetrical between the frame C and the center lll1llJ are set, respectively, as shown in FIG. Further, the average humidity Tc, Td of the area surrounded by each frame is determined by the arithmetic circuit 26 and stored in the registers 27C, 27D, respectively. Therefore, the output of the subtraction circuits 28, 29, 30, and 31 is (Ta −
Tb), (Ta-Tc), (Tb-
Td) and (Tc - Td) are obtained, respectively.

The position calculation circuit 32 is a frame setting circuit 24A.

Based on the frame position data from 24B, a fill position signal that specifies the position of the space between frame A and frame B is calculated, and together with the write position signal, the difference temperature data of <Ta - Tb) is sent to the character writing circuit. Send to 36. The character writing circuit 3
6, if the value of 1'-a-Hb is, for example, 0.92°C at a position in the memory 16 that corresponds to between frame A and frame B specified by the write position signal, as shown in FIG. IQ,
Write 92J. In exactly the same way, the position calculation circuit 33
The position calculation circuit 34 sends a write position signal specifying the space between frame B and frame C, and the position calculation circuit 34 sends a write position signal specifying the position of the space between frame B and frame C.
5 calculates position signals specifying the positions of the spaces between the frame C and the frame, and obtains difference temperature data <Ta-'lc) from each subtraction circuit.

(Tb - Td) and ("rc - Td) are sent to the character writing circuit 36. The character writing circuit 36
As shown in FIG. 4, the difference temperature data between the average temperatures of the respective frames is written in numerical values at the positions in the memory 16 that correspond to the positions between the frames designated by the respective write position signals. The four numbers written in the memory 16 are stored in the frame display memory 1.
The temperature distribution image of the subject is displayed on the screen of the display device 11 as shown in FIG. Z, four frames A, B, C, and D are displayed, and between frame A and frame B, between frame A and frame C, between frame C and frame 'D, and between frame B and frame. In between, the value of the difference in average temperature within each frame will be displayed.

[Effect] Therefore, where in the temperature distribution image of the subject is the frame set?
The extent to which the average temperature within the frame differs between the left and right sides of the center axis J can be easily seen by focusing on the numerical values between the left and right frames. Also, by paying attention to the numbers between the upper and lower frames, you can find out the temperature difference between the center and the periphery.

As detailed above, according to the present invention, it is possible to set a plurality of regions in the temperature distribution image of a subject, and it is possible to instantly know the difference in average temperature of each region from the numerical values displayed on the same screen. It becomes possible.

[Modification] Note that the value of the difference in average temperature can be displayed anywhere on the same screen, but if it is displayed between each frame as in this example, it is possible to display the value of the average temperature difference in which frame and which frame. It is possible to immediately determine whether there is a difference based on the correspondence with the frame. If such a display method is not used, it goes without saying that it is necessary to clearly indicate which frame the numerical value is the difference between, such as rA-B:0.92J.

Further, in the above-described embodiment, a device constructed of individual blocks was illustrated for ease of understanding, but in reality, the frame writing circuit 23. Frame setting circuit 24. Frame address setting circuit 25
．． Average temperature calculation circuit 26° register 27. Subtraction circuit 28
~312 Position calculation circuits 32-35. Temperature range setting circuit 9
It is possible to replace the functions such as the above with a computer, and it is more practical to use one memory for both the memory 16 and the memory 17.

Further, in the above-described embodiment, the area is specified using a rectangular frame, but the frame may be selected in any shape. For example, the operator may use a light pen or the like to enclose the target area and specify the area.

Furthermore, there is only one frame setting circuit (by which the set frame can be slid vertically and/or horizontally).
If you set another frame using , it becomes easier to set the frame.

[Brief explanation of the drawing]

FIG. 1 is a dimensional diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the display state of the screen, and FIG. 3 is a diagram showing the arrangement of pixels in the image memory 8. 4 and 5 show the memory 16
．． FIG. 6 is a diagram for explaining the storage area shown in FIG. 17, and is a diagram showing the display state of the temperature difference. 8: Image memory, 9: Temperature range setting circuit, 10: Readout selection circuit, 11: 'E monitor cathode ray tube display device, 12: Image display memory, 13: D-A converter, 14 two-level shift circuit, 15: Blurred signal conversion circuit, - 16: Character display memory, 17: Frame display memo 1], 1
8: OR circuit, 19: Synchronous signal generation circuit, 20: Pixel clock oscillator, 21.22: J counter, 23: Frame writing circuit, 24: Frame setting circuit, 25: Frame address setting circuit, 26: Average Humidity calculation circuit, 27: Register, 28-31: Subtraction circuit, 32-35: Position calculation circuit, 36: Character writing circuit. Patent Applicant JEOL Ltd. Representative Ito - Husband Procedural Amendment (Method) Director of the Japan Patent Office Kazuo Wakasugi 1, Indication of Case Patent Application No. 69697/1982 2, Name of Invention Thermography Device 3, Person Making Amendment Relationship to the incident Patent applicant address 1418 Nakagami-cho, Akishima-shi, Tokyo (T[104
25 (43) 1165) - Name (427) JEOL Co., Ltd. July 26, 1981 5. Full text of the specification to be amended 6. Engraving of the specification of the contents of the amendment (no change in content) 2.

Claims (1)

[Claims] means for storing temperature data of pixels constituting the field of view obtained by detecting infrared rays from the subject; reading means for reading out the temperature data stored in the storage means; display means for displaying a temperature distribution image; means for specifying a plurality of arbitrary areas on the screen of the display means; and reading temperature data of pixels included in the plurality of areas specified by the specifying means from the storage means. means and
Means for determining the average temperature of each region based on the read temperature data of each region, and means for determining the obtained average temperature of each region, and displaying the difference temperature value on the screen of the display means. A thermography device characterized by: