JPH0618394Y2 - Image data display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an image data display device suitable for use in grasping the temperature change with time of an arbitrary site on a measurement target.

[Prior Art] There is a thermography device as a device for acquiring a temperature distribution image of a measurement target. In the thermography device, infrared rays emitted from each point in the field of view are scanned and condensed, guided to an infrared detector, and the obtained infrared image signal is sent to a display device directly or through an image memory, for example, as shown in FIG. As shown, the temperature distribution image Z is displayed. The image Z is rewritten, for example, every screen scanning performed at a cycle of about once per second.

As can be seen from FIG. 4, a horizontal cursor HC and a vertical cursor VC, which can be moved so as to be superimposed on the temperature distribution image, are displayed on the screen of the display device, and the temperature change along the cursor HC is displayed as an image Z as a waveform Wh. , And the temperature change along the cursor VC is displayed as a waveform Wv at the left end of the image Z, and the temperature value at the intersection CP of these two cursors is sampled, and the temperature value is displayed on the image Z. Is displayed numerically. As described above, since the image Z is rewritten for each screen scanning, the temperature change at the intersection P can be grasped by monitoring this temperature value.

When actually recording a temporal change in the temperature value of the cursor intersection CP, for example, Japanese Patent Application No. 57-18691.
As proposed in No. 7, it is conceivable to sequentially display the temperature values numerically on the same screen as the image Z.

[Problems to be solved by the invention] However, in such a method, if the position whose temporal change is once measured is not preferable, the position of the intersection CP must be changed and the measurement cannot be performed again. In such a case, it is inconvenient.

The present invention has been made in view of the above points, and an object thereof is to provide an image data display device suitable for use in such a case.

[Means for Solving Problems] To achieve this object, an image data display device according to the present invention specifies an image memory for storing data of a plurality of images and a position of a specific pixel in the image. Means, means for generating an address signal for reading out pixel data at the designated position in the plurality of images based on the position designation signal from the position designating means, and the image memory based on the address signal. And a means for displaying a graph based on the read plurality of pixel data.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of a thermography device embodying the present invention. In FIG. 1, the camera unit 1 two-dimensionally scans and collects infrared rays emitted from each point in the field of view, and the infrared ray image signal obtained is an A / D converter 2, a changeover switch 3, a writing circuit. It is sent to the image memory 5 via 4 and stored.

The temperature data stored in the image memory 5 is read at a high speed by the reading circuit 6 and sent to the cathode ray tube (CRT) display device 9 through the synthesizing circuit 7 and the changeover switch 8, so that the screen has a camera. The temperature distribution image of the field of view photographed by the unit 1 is displayed in a single color or color.

Reference numeral 10 is a cursor memory for displaying a cursor to be superimposed on this temperature distribution image. In this memory, a writing circuit 12 is provided based on cursor information from a cursor position designating circuit 11.
Thus, the horizontal cursor HC and the vertical cursor VC are written. The written cursor pattern is read at a high speed by the reading circuit 13, and the synthesizing circuit 7 and the changeover switch 8 are used.
Since it is sent to the CRT display device 9 via the, the horizontal and vertical cursors are displayed so as to be superimposed on the temperature distribution image.

Reference numeral 14 denotes a memory having a capacity capable of storing temperature data of, for example, 10 temperature distribution images, and the temperature data obtained from the camera unit 1 is written by the writing circuit 15 at a predetermined time interval Δt.
One for each is sequentially stored.

Reference numeral 16 is a read circuit attached to the memory 14, and the read temperature data is sent to the image memory 5 or the coordinate conversion circuit 18 via the changeover switch 17. The graph data obtained by the coordinate conversion is written in the graph display memory 20 via the writing circuit 19, further read by the reading circuit 21 and sent to the display device 9 via the changeover switch 8. Reference numeral 22 is a scale writing circuit for writing a scale on a graph based on the central temperature information CT and the measured temperature width information TW sent from the camera unit 1 and the measurement time interval information Δt.

In the configuration as described above, the image memory 5 has 256 pixels per line and one screen 2 as shown in FIG.
A storage area of 256 × 256 pixels and 8 bits in the depth direction (each temperature data is stored in 8 bits) is set as 56 lines, and the temperature data of each pixel obtained by the visual field scanning in the camera unit 1 is 8 It is stored in the corresponding position in the area with a dynamic range of bits. Then, this data is sequentially rewritten with new data every one screen scan once per second, for example.

On the other hand, a storage area for 256 × 256 pixels is also set in the cursor memory 10 as shown in FIG. 2B, but since this only indicates the presence or absence of the cursor, the depth direction is 1 bit. .

The cursor memory 10 has a cursor position designating circuit 1
The cursor writing circuit 12 writes a cursor pattern composed of a horizontal cursor HC and a vertical cursor VC as shown in FIG. 2B based on the cursor data for specifying the display positions of the horizontal and vertical cursors sent from the controller 1. ing.

The image data and the cursor pattern thus written in the memories 5 and 10 are simultaneously read by the reading circuits 6 and 13 in synchronization with the screen scanning of the display device 9 and are combined in the combining circuit 7, so that the switching is performed. When the switch 8 is tilted to the synthesis circuit 7 side, the screen of the display device 9 displays
As shown in FIG. 4, the temperature distribution image Z and the horizontal and vertical cursors HC and VC are displayed in a superimposed manner. Since the structure for displaying the temperature value at the cursor intersection CP and the structure for displaying the horizontal and vertical waveforms are omitted, the temperature value and the horizontal and vertical waveforms are not displayed in this embodiment.

The temperature distribution image displayed on the screen of the display device 9 is 1 in 1 second.
The writing circuit 15 is rewritten and erased each time one screen scan is performed, but the writing circuit 15 operates at a time interval designated by the operator.
For example, the image data for one screen is written and stored in the memory 14 every 10 seconds. Therefore, 100 seconds after the start of measurement,
As shown in FIG. 1, ten temperature distribution image images Z1 to Z10 taken at intervals of 10 seconds are stored in the memory 14.

After the measurement for 100 seconds is completed in this way, the changeover switch 3 is moved to the memory 14 side and the changeover switch 17 is moved to the image memory 5 side, and the operator, for example, the first image Z1.
Is designated, the reading circuit 16 reads the data of the image Z1. Since this data is sent to and stored in the image memory 5 via the changeover switches 17 and 3 and the writing circuit 4, the image Z1 is continuously displayed on the screen of the display device 9. The cursor pattern stored in the cursor memory 10 is superimposed and displayed on the image Z1. By operating the cursor position designating circuit 11, the operator matches the cursor intersection point CP with the point of interest in the image Z1. be able to.

Next, when the operator commands the readout circuit 16 to display a graph, the selector switch 17 is moved to the coordinate conversion circuit 18 side, and the selector switch 8 is moved to the graph display memory 20 side.
The readout circuit 16 is based on the cursor position designation value signal from the cursor position designation circuit 11, and temperature data of the pixel corresponding to the position of the cursor intersection point CP in the ten temperature distribution images Z1 to Z10 stored in the memory 14. Dcp1 ~ Dcp10
Are sequentially generated, and the ten data Dcp1 ...
Read Dcp10. The read data is the coordinate conversion circuit 1
8 and the writing circuit 19 to display the graph display memory 20.
In this memory 20, a graph pattern in which the horizontal axis represents time and the vertical axis represents temperature as shown in FIG. A vertical axis position corresponding to the value is given, and the horizontal axis is isolated for a certain period and written in this graph pattern as 10 bright points as shown in FIG. 3 (b). The coordinate conversion circuit 18 plays a role of converting each data value into position data in the vertical axis direction.

Since it is difficult to see only the bright points, in the present embodiment, the line connecting the points is also written as shown in FIG. 3 (c). The data of this line can be easily created in the coordinate conversion circuit 18 or the writing circuit 19 based on the data of 10 points.

Further, as shown in FIG. 3 (d), the scale writing circuit 22 writes scale values at intervals of 10 seconds in the horizontal axis direction in the graph pattern based on the measurement time interval information Δt, and at the time of temperature distribution image acquisition. The temperature scale is written in the vertical axis direction of the graph pattern based on the information defining the temperature measurement range, for example, the center temperature TC and the temperature width TW (or information about the upper limit temperature and the lower limit temperature or the lower limit temperature and the temperature range).

The operator may specify this scale-related information, but it is stored together with the image data in the memory 14 at the time of measurement, and is read out separately from the image data using the read-out circuit 16 at the time of display to read the scale-writing circuit. It is convenient to supply to 22.

The graph pattern in which each information is written in this way is repeatedly read out at high speed by the reading circuit 21 and sent to the display device 9 via the changeover switch 8, so that the screen of FIG. The graph of will be displayed.

According to this graph, 10 stored in the memory 14
Temperature data Dcp of pixels at the same position in the images Z1 to Z10
Since 1 to Dcp10 are expanded in the horizontal axis direction and displayed as a graph, the operator can immediately grasp the temperature change with time at the position designated by the cursor intersection point CP.

Further, since the original image is stored in the memory 14, it is possible to reset the position of the cursor intersection point CP as many times as necessary, without re-measuring the change with time of any position in the image. It is possible to grasp.

It is also easy to specify a plurality of positions on the screen and display a plurality of graphs in a superimposed manner. In this way, the contrast of the temperature change at different positions over time becomes clear.

In addition, since the temperature distribution image is usually displayed as a color image with a hue according to the temperature, the third image is displayed in the graph display.
As shown in FIG. (E), if the hue is given according to the position (temperature value) in the vertical axis direction and the graph is displayed, it is possible to clearly grasp the temperature change based on the hue. is there.

[Advantages of the Invention] As described in detail above, according to the present invention, an apparatus capable of reading out data corresponding to the same position of a plurality of images stored in a memory and displaying it as a graph is realized. for that reason,
It is possible to easily grasp the change with time of an arbitrary position in the image, which is convenient especially when remeasurement is impossible.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a thermographic device embodying the present invention, FIG. 2 is a diagram for explaining storage areas of memories 5 and 10, and FIG. 3 is a graph display memory 20.
For explaining the writing of the graph pattern into
The figure is for explaining the display screen of the thermography device. 1: Camera part, 2: A-D converter 5: Image memory 3, 8, 17: Changeover switch 4, 12, 15, 19: Write circuit 6, 13, 16: Read circuit 7: Combined circuit, 9: CRT Display device 10: Cursor memory, 11: Cursor designating circuit 14: Memory, 18: Coordinate conversion circuit 20: Graph display memory 22: Scale writing circuit

Claims (3)

[Scope of utility model registration request] 1. A memory for storing data of a plurality of images, a unit for designating a specific position in the image, and the designated position in the plurality of images based on a position designation signal from the position designating unit. Of the pixel data, a means for reading the pixel data from the memory based on the address signal, and a means for displaying a graph based on the plurality of read pixel data. Image data display device. 2. A utility model registration claim according to claim 1, wherein said position designating means can designate a plurality of specific positions, and said graph displaying means superimposes and displays a plurality of graphs based on the read data. The image data display device described. 3. The utility model registration claim according to claim 1, wherein the image data is a plurality of temperature distribution image data obtained by photographing the same visual field at different times with a thermographic device. The image data display device according to.