JPS62265537A - Display method for time-series image data - Google Patents

Abstract

PURPOSE:To compare and observe a two-dimensional temperature distribution at a certain point of time and the temperature variation of a certain line with time by displaying a two-dimensional image and an image which varies with time at the same time. CONSTITUTION:An infrared-ray image signal from a camera part 1 is stored in an image memory 5 through an A-D converter 2 and a writing circuit 4. An image memory part 11 is stored with temperature distribution images at specific intervals of time. Changeover switches 12 and 8 are connected to sides of a display control part 14 and then a display control part 14 reads a temperature distribution image of an optional section out of the image memory part 11. Therefore, while the temperature distribution of an object of measurement at a certain point of time is viewed, temperature variation of the certain section of the distribution image with time can be viewed by being set with a cursor line.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a time-series image data display method suitable for use in understanding temperature changes over time at any part of an object to be measured. , relates to a method of displaying time-series image data that simultaneously displays two-dimensional and temporal temperature changes of a measurement target.

[Conventional technology]

FIGS. 6 and 7 are diagrams for explaining conventional display screens of thermography apparatuses.

In heat dissipation design for semiconductor ICs, skin temperature reaction testing in the medical field, etc., it is necessary to understand temperature changes and distribution over time at θ11 constant. As the device, a thermography device is known. This thermography device scans and focuses infrared rays emitted from the object to be measured, and detects them with an infrared detector.
The obtained infrared image signal is sent to a display device directly or via an image memory, and a temperature distribution image Z is displayed, for example, as shown in FIG. In FIG. 6, HC,
VC is a movable horizontal cursor and a vertical cursor, respectively. In this display device, the temperature along the horizontal cursor HC is shown as a waveform W below the image Z, and the temperature along the vertical cursor VC is shown as a waveform Wv. They are each displayed on the left side of the image Z, and furthermore, the temperature value at the intersection point CP of this cursor is sampled and displayed above the image Z as a numerical value. This statue Z
is rewritten every time the screen is scanned, for example, once every second. Therefore, temperature changes can be ascertained by monitoring the temperature value at the cursor intersection point CP.

When actually trying to memorize the change over time in the temperature value at the cursor intersection point cp, the image Z
It is conceivable to sequentially display temperature values numerically on the same both sides. In addition, although the present inventor previously proposed and filed a separate application, the seventh
It is also an effective method to display it as a graph as shown in the figure.

[Problem that the invention seeks to solve]

However, with the conventional display method as described above, it is only possible to know the temperature change over time at one point (cursor intersection point CP) or the temperature change on a specific planar line. There is a problem in that it is not possible to view the heat source flow, heat source flow, and heat diffusion process three-dimensionally, and it is not possible to grasp the overall temperature characteristics of the object to be measured.

The present invention solves the above-mentioned problems, and aims to provide a method for displaying time-series image data that allows viewing both planar temperature changes and temporal temperature changes of an object to be measured. shall be.

Means for Solving Problem c] To this end, the time-series image data display method of the present invention stores the time-series image data in a three-dimensional memory and displays the two-dimensional distribution and changes over time of pixel data. A method for displaying time-series image data, in which a display screen is divided, and a plurality of cross-sections of memory space are specified from a three-dimensional memory that stores time-series image data in each display area of the divided display screen. The feature is that pixel data corresponding to a cross section is read out and displayed.

[Effect]

In the display method of time-series image data of the present invention, by specifying a plurality of cross-sections of a three-dimensional memory space, an image of pixel data from each cross-section is displayed. While observing the planar distribution, it is also possible to observe changes over time. Therefore, it is possible to accurately grasp the state of temperature change at the assigned position. Furthermore, by setting a specific region at a plurality of locations, temperature changes can be compared simply by FJ.

〔Example〕

Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a block configuration diagram of a thermography apparatus for explaining an example of the present invention, FIG. 2 is a diagram for explaining the 1q area of the image memory, and FIG. 3 is a diagram of the image memory section. Diagram 4 for explaining the configuration and types of displayed images
The figure shows an example of the configuration of the entire display on both sides.

In FIG. 1, l is a camera unit, 2 is an A/D converter, and 3
．． 8 and 12 are changeover switches, 4 and 10 are write circuits, 5 is an image memory, 6 and 13 are continuous output circuits, 7 is a synthesis circuit, 9 is a display device, 11 is an image memory section, and 14 is a display control section. .

The camera unit 1 two-dimensionally scans and focuses infrared rays emitted from the object to be measured, and detects the infrared rays to obtain an infrared image signal. The infrared video signal is converted into a digital signal of, for example, 8 bits per pixel by an A-D converter 2 and stored in an image memory 5 through a changeover switch 3 and a write circuit 4. As shown in FIG. 2, the image memory 5 has a capacity of 256 lines, 256 pixels per line, and 8 bits per 1iiiIiii element.
The temperature data of each pixel of the infrared video signal obtained by the camera section 1 is stored in the corresponding position in the memory area with an 8-bit dynamic range.

This data is then processed according to the pixel scanning of the camera unit 1.
For example, data is rewritten with new data once every second.

At this time, along with the old image data stored in the image memory 5, the cursor pattern is also read out from the display control section 14 at the same time in synchronization with the screen scanning of the display device 9.
is synthesized with Therefore, when the changeover switch 8 is connected to the synthesis circuit 7 side, the temperature distribution image Z, the X-axis cursor XC, and the Y-axis cursor YC as shown in FIG. 6 are displayed superimposed on the display holder 9. It turns out. In addition, the horizontal waveform,
The configuration for displaying the vertical waveform and the temperature value at the cursor intersection point CP is not directly related to the present invention and will therefore be omitted.

On the other hand, assuming that the temperature distribution image displayed on the display device 9 is rewritten every pixel scan of the camera unit l, for example once per second, the writing circuit 15 updates the image at a time interval specified by the operator, for example. Time-series temperature distribution image data for one screen is written into the image memory section 11 one after another every 10 seconds.

Therefore, assuming that the image memory unit 11 includes image memories Z, ~Z2S& for 256 screens, the image memory unit 11 stores 256 temperature distribution images taken at 10 second intervals. That will happen. Note that the image memory section 1
The memory capacity of each of the image memories Z1 to Zts6 of 4 is the same as that of the image memory 5.

After measuring for 10 x 256 seconds as described above and writing the time-series temperature distribution image data for 256 screens into the image memory section 11, the operator then connects the changeover switch 12.8 to the display control section 14 side. 3 according to the present invention
In this three-dimensional image data display, the X axis is 256 pixels, the Y axis is 256 pixels, and the T axis is 25 pixels.
By specifying the T-axis cursor, X-axis cursor, and Y-axis cursor in the 3-dimensional memory space consisting of 6 images, the pixel data of the cross section shown in Figure 3 is read out from the 3-dimensional memory space and displayed. . For example, since the T-axis image is a time-axis cross-sectional image, it displays the temperature distribution image of the object to be measured at that point in time, and the Y-axis image cuts each time-series image data at the cursor line of the X-coordinate value. Display the cross-sectional image. Therefore, while looking at the temperature distribution of the measurement target at the time of measurement, you can set a cursor line at an arbitrary X coordinate value or a cursor line at an arbitrary X coordinate value in the distribution image, and simultaneously measure the temperature change over time at that cross section. You can watch it.

FIG. 4 shows an example of a display screen displaying the above-mentioned T-axis image, Y-axis image, and Y-axis image. Figure 4 (al is
The display screen is divided into four display areas, and the upper left area displays the Y-axis image, the lower left area displays the T-axis image, and the lower right area displays the Y-axis image. Correspondingly, T-axis cursor TC, X-axis cursor XC, Y
Axis cursor YC is displayed overlappingly. Therefore, the image of the cross section defined by the Y-axis cursor YC displayed on the T-axis image becomes the Y-axis image, and 'X-axis cursor X displayed on the ring image
The image of the cross section taken by C becomes the Y-axis image. As is clear from this, the intersection point CP of the cursors in each image indicates the same point, and the line of the X-axis cursor xC of the Y-axis image and the line of the Y-axis cursor YC of the It would indicate a change. This pixel data is graphed and displayed in the upper right area in Figure 4 (bl).Similarly, the line of the Y-axis cursor YC of the T-axis image and the line of the T-axis cursor T of the Y-axis image
C line, T-axis image X-axis cursor xC line and Y
The lines of the T-axis cursor TC in the axis image correspond to each other.

Next, a display control unit that displays the screen as described above will be explained with reference to FIG.

FIG. 5 is a diagram showing a specific example of the configuration of the display control section.
．． 15 is a T-axis image succession circuit, 16 is a T-axis image memory, 1
7 is an X-axis image succession circuit, 18 is a Y-axis image memory, 19 is a Y-axis image succession circuit, 20 is a Y-axis image memory, 21 is a graph drawing circuit, 22 is a graph display memory, 23 is a cursor position designation circuit, 24 is the T-axis cursor writing circuit, 25 is the X
Axis cursor writing circuit, 26 is Y-axis cursor writing circuit, 2
Reference numeral 7 indicates a cursor memory, 28 a succession/synthesis circuit, and 29 a display device.

Now, from the cursor position designation circuit 23, the T-axis cursor,
When the axis cursor and Y-axis cursor positions are specified,
A cursor pattern is written in the cursor memory 27 by each T-axis cursor writing circuit 24, X-axis cursor writing circuit 25, and Y-axis cursor writing circuit 26, and the position signal of each cursor is sent to the T-axis image successive circuit. 15, X-axis image succession circuit 17, Y-axis image succession circuit 19,
and is sent to the graph drawing circuit 21. Then, the T-wheel image successive circuit 15 outputs two images corresponding to the position of the T-axis cursor.
The X-wheel image succession circuit 17 generates chronological pixel data corresponding to the position of the X-axis cursor, and the Y-wheel image succession circuit 19 generates chronological pixel data corresponding to the position of the Y-axis cursor. are read from the three-dimensional memory and written to each image memory (16, 18, 20). When the pixel data is written to the Y-wheel image memory 20, the graph drawing circuit 21 reads out the pixel data from the Y-wheel image memory 20 in correspondence with the position of the X-axis cursor, and draws the pixel data on the graph display memory 22. Further, the graph drawing circuit 21
Pixel data may be read from the X-wheel image memory 18 depending on the position of the axis cursor.

Each memory (16, 18, 20, 22
, 27) are simultaneously read out in synchronization with screen scanning by the successive/synthesizing circuit 2, synthesized, and output to the display device 29.

In this case, for the T-axis image, The cursor pattern will be displayed at any time.Therefore,
As is clear from FIG. 4 (bl), when scanning the upper screen, the pixel data of the Y-wheel image memory 20 is read out by scanning the left half of the screen, and the pixel data of the graph display memory 22 is read out by scanning the right half of the screen. Pixel data is read out. Also, for example, an X-axis cursor pattern is displayed in the display area of the T-axis image and the Y-axis image, and a Y-axis cursor pattern is displayed in the display area of the T-axis image and the X-wheel image.

Note that the present invention can be modified in various ways and is not limited to the above embodiments. For example, in the example display screen shown in Figure 4, a cross-sectional image is displayed using the horizontal and vertical cursors, but it is also possible to display a cross-sectional image obtained by cutting the three-dimensional memory diagonally using the slanted cursor. It's okay.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a two-dimensional image and a temporal image are obtained by storing time-series image data in a memory and reading out pixel data from an arbitrary cross section from the memory. Since they are displayed at the same time, you can compare and observe the temperature change over time of the line that is the two-dimensional point distribution at the point in time, and easily see the state of heat conduction of the measurement object, the movement of hot points, the state of heat diffusion, etc. can be grasped.

Moreover, since the temperature change over time can be observed simultaneously from both the X-axis cross section and the Y-axis cross section, it is possible to observe the three-dimensional temperature change over time. Thus, according to the present invention, 2
It is possible to observe the state of thermal diffusion across multiple dimensions and time axes, and it can be effectively used to analyze heat conduction and heat generating parts.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of a thermography apparatus for explaining one embodiment of the present invention, FIG. 2 is a diagram for explaining the storage area of the image memory, and FIG. 3 is a diagram showing the configuration of the image memory section and the displayed image. 4 is a diagram showing an example of the overall display screen configuration, FIG. 5 is a diagram showing a specific configuration example of the display control section, and FIGS. 6 and 7 are diagrams for explaining the types of thermographs. FIG. 2 is a diagram for explaining a conventional display screen of the device. 1...Camera section, 2...A/D converter, 3.8 and 1
2...Selector switch, 4 and 10...Writing circuit, 5.
... Image memory, 6 and 13... Successive circuit, 7... Combination circuit, 9 and 29... Display device, 11... Image memory section, 14... Display control section, 15... T-wheel image succession circuit, 16...T-axis image memory, 17...X-wheel image succession circuit, 18...Y-axis image memory, 19...Y-wheel image succession circuit, 20...Y-axis Image memory, 21...
Graph drawing circuit, 22...Graph display memory, 23.
...Cursor position designation circuit, 24...T-axis cursor writing circuit, 25...X-axis cursor writing circuit, 26...
Y-axis cursor writing circuit, 27 cursor memory, 28.
...Synthetic circuits are coming one after another. Applicant JEOL Co., Ltd. Representative Patent Attorney Abe Fil Yoshi (2 others) Figure 3 (α) A (e) XJ-Yo Figure 6/Noh Figure ■

Claims (1)

[Claims] A time-series image data display method that stores time-series image data in a three-dimensional memory and displays a two-dimensional distribution of pixel data and changes over time, in which the display screen is divided and each of the divided display screens is A method for displaying time-series image data, comprising specifying a plurality of cross-sections of memory space in a display area from a three-dimensional memory storing time-series image data, and reading and displaying pixel data corresponding to each cross-section.