JPS63223534A - Thermography device - Google Patents

Abstract

PURPOSE:To simplify the constitution of circuits by storing gray scale information in an image information storage means together with temperature distribution image information, and allowing a common arithmetic circuit to perform the temperature conversion of a noted point and the temperature conversion for a scale display of the gray scale. CONSTITUTION:Plural pieces of gray scale information Dgs0-Dgs250 are written fixedly at the right end of an image memory 4 to the width of 10 picture elements in the same 8-bit form as that of temperature information. The information is read out by a reading circuit 5 and given gradations by a display device 7 to display a gray scale having gradations as many as picture elements. A cursor position specifying circuit 9 specifies a picture element corresponding to an intersection CP, the reading circuit 5 reads corresponding picture element information Dcp out of the memory 4, and the arithmetic circuit 13 calculates the absolute temperature Tcp at the intersection CP according to center temperature CT and temperature width TR from a range specifying circuit 12 and writes it in a memory 8. When a gradation number selecting circuit 14 selects a number '8', a writing circuit 10 writes scale lines M0-M8 in the memory, the reading circuit 5 reads out information Dgs at the position of a M line, and the arithmetic circuit 13 calculates a scale value Tgs by the same arithmetic as that of the CP.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a thermography apparatus that obtains an infrared temperature distribution image.

[Prior Art] Generally, in a thermography apparatus that obtains an infrared temperature distribution image, an image processing system that displays the temperature value of a point of interest in the image using numerical values and colors includes, for example, an image data processing system, a character data processing system, A mechanism as shown in FIG. 3 is known that displays an image by combining data processed individually by each gray scale display system. In FIG. 3, 21 is an image memory, 22 is a character memory,
23 is a gray scale memory, 24, 25, 26 is a readout circuit, 27 is a synthesis circuit, 28 is an image display device, 29 is a specified point temperature calculation circuit, 30 is a cursor/character writing circuit, 31 is a scale writing circuit, ・32 is a cursor position designation circuit.

The image memory 21 stores the image obtained from the infrared camera in FIG.
Temperature distribution image data as shown in > is stored. The character memory 22 stores data for numerically displaying the temperature of the cursor lines CH and CV and their intersection point CP as shown in FIG. 4(b). At this time, the image data of the point corresponding to the point CP is extracted from the image memory 21 by the specified point temperature calculation circuit 29, the temperature calculation of the point is performed, and the resulting temperature value is written into the character memory 21 by the writing circuit 30. For example, rCP:25J is written to.

The grayscale memory 23 stores data for displaying a grayscale as shown in FIG. 4(C) and scale lines associated with the grayscale, and further stores temperature range information such as center temperature CT.

A temperature value corresponding to each scale line calculated using the scale writing circuit 31 based on the temperature width TR and the number of gradations N is written next to each scale line.

As mentioned above, the data stored in each memory is synchronously read out by the reading circuits 24 to 26, combined into one image data by the combining circuit 27, and sent to the display device 28, so that the screen shown in FIG. As shown in (d), infrared temperature distribution image 71 cursor CH, CV, gray scale,
The temperature value of CP and the value of reference temperature CT are displayed.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, the image data system, character data system, and scale display system form independent circuits, and an image is displayed by combining the data of each system. It has a circuit configuration.

The present invention solves the above problems, and aims to provide a thermography apparatus with a simplified configuration.

[Means for Solving the Problems] To this end, the present invention provides means for storing temperature data of pixels constituting a field of view obtained by detecting infrared rays from a subject;
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; and display means for specifying an arbitrary position on the image of the display means. A position specifying means, a means for sampling temperature data corresponding to a position specified by the position specifying means, a temperature conversion means for converting the sampled temperature data into a temperature value, and a display of the temperature value on a screen. and means for simultaneously displaying, on the screen of the display means, a gray scale whose hue or brightness changes stepwise or continuously and whose total length corresponds to the measured temperature range, at the same time as the temperature distribution image. storing grayscale data for displaying a grayscale in the storage means together with the temperature data, and reading grayscale data corresponding to points separated by predetermined intervals on the grayscale from the storage means; The read grayscale data is converted into a temperature value by the temperature conversion means, and the temperature value is displayed on the screen along the grayscale.

[Function] The thermography apparatus of the present invention eliminates the conventional grayscale memory by storing grayscale data together with temperature distribution image data in the image data storage means, and also performs temperature conversion calculation of the point of interest and grayscale scale. The configuration is simplified by performing temperature conversion calculations for display in a common calculation circuit.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. 1st
The figure is a block diagram showing one embodiment of the thermography apparatus according to the present invention, and FIG. 2 is a diagram for explaining the storage area of the memory. In FIG. 1, an imaging unit 1 two-dimensionally scans and focuses infrared rays emitted from an object to be measured, and detects the infrared rays to obtain an infrared image signal. 2, the signal is converted into a digital signal of 8 bits per pixel, for example, and stored in the image memory 4 via the write circuit 3.

This image memory 4 has 256 pixels as shown in FIG. 2(a).
It has x256 pixels and a capacity of 8 bits per pixel, and the temperature data of each pixel sent via the A/D converter 2 is stored in the corresponding position in the memory area. This temperature data is then rewritten with new data, for example, once every second in accordance with the screen scanning of the imaging unit 1. The temperature data stored in the image memory 4 is read out by a readout circuit 5, sent to a display device 7 via a synthesis circuit 6, and displayed as a temperature distribution image.

The character memory 8 has 30 characters as shown in FIG. 2(b).
It has a capacity of 0x300 pixels and 1 bit per pixel.
The memory is provided with a write circuit 10 based on the horizontal and vertical cursor position data designated by the cursor position designation circuit 9.
writes the cursor pattern. The character memory 8 also contains a horizontal cursor CH and a vertical cursor C.
The temperature value at the intersection point CP, the scale line of the gray scale, and the temperature value corresponding to the scale are written by the character writing circuit 10. Such character data stored in the character memory 8 is read out by the readout circuit 11, sent to the display device 7 via the synthesis circuit 6, and displayed superimposed on the temperature distribution image.

Reference numeral 12 indicates a temperature range setting circuit for setting a center temperature CT and a temperature range TR that define the temperature range to be displayed; This is an arithmetic circuit that converts it into a value. Reference numeral 14 denotes a selection circuit for selecting the number of gradations, which sends a command signal for writing a scale line corresponding to the selected number of gradations to the character memory 8 to the writing circuit 10, and also sends a readout signal corresponding to the scale line. is sent to the readout circuit 5.

In the above-mentioned configuration, gray scale data is fixedly written in a part of the memory area of the image memory 4, for example, the right end part, with a width of 10 pixels, as shown in FIG. 2 (a>). In other words, this grayscale data is incremented by 1 such that the data Daso in the bottom row is "O", the data [) gsl in the second row is "1", and the data Dos2 in the third row is "2". , and the data D in the top row (
13255 is written as the same 8-bit data as the temperature data ending with r255J.

The grayscale data fixedly stored in the image memory in this way is treated in exactly the same way as image data stored in other areas, read out by the readout circuit 5, and sent to the display device 7 to display each image data. If the image is displayed with gradations in exactly the same manner as above, it is possible to display a gray scale having the same number of gradations, for example 8, as each pixel making up the image. Therefore, since the gray scale memory and the readout circuit attached thereto can be removed, the configuration is simplified.

In the present invention, the calculation of the temperature value of the scale to be displayed in accordance with the gray scale is performed by the calculation circuit 13 that calculates the temperature value of the cursor intersection, which further simplifies the configuration. That is, the cursor position designation circuit 9 sends a position signal designating the pixel corresponding to the cursor intersection point CP to the readout circuit 5.

Based on this position signal, the readout circuit 5 selects the cursor intersection C.
Pixel data Dcp corresponding to P (Q≦Dcp≦255
) is read from the image memory 4 and sent to the arithmetic circuit 13. The calculation circuit 13 calculates the absolute temperature (i!ITcp) of the intersection point CP based on this data and the center temperature CT and m degree width TR sent from the temperature range setting circuit, and sends the obtained temperature value Tcp to the writing circuit 10. Therefore, the temperature value of the intersection point CP, such as [CP:35.5J, for example, is written in a predetermined position of the character memory 8 as shown in FIG. 2(b).

On the other hand, when the number of gradations is 8 is selected by the number of gradations selection circuit 14, based on the command from the selection circuit 14, the writing circuit 10 writes nine scale lines M dividing the gray scale into eight equal parts.
O to MB are written into the character memory 8 as shown in FIG. 2(b). The gradation number selection circuit 14 further selects grayscale data [)gsO at the positions of these nine scale lines Mo to Ms.

D(]S32. DlllS64. ..., [)
Sequentially generate read signals for reading gs255,
It is sent to the readout circuit 5.

The grayscale data DasO, Dgs32 . --- , D (182
TQS32.55Gt is sequentially sent to the arithmetic circuit 13 and subjected to exactly the same calculation as in the case of the intersection CP to obtain the gray scale temperature value at the scale line position, that is, the scale value rgso, TQS32.・・・
・.

T (converted to ls255. The writing circuit 1o sequentially writes the scale values filled in this way sequentially next to each scale line in the character memory 8 as shown in FIG. 2(b). .Such scale value writing work is performed when the scale value is changed, for example, when CT and/or TR is changed by the temperature range setting circuit 12 or when the number of gradations is changed by the gradation number selection circuit 14. Changes are made whenever necessary.

In addition, in the case of changing the number of gradations, a command signal is sent from the gradation number selection circuit 14 to the writing circuit 1o, and it goes without saying that the scale lines are also rewritten, and the gray scale data at the rewritten scale line position is All you have to do is read out and convert it into scale values.

In this way, the grayscale scale lines and scale values are stored in the character memory 8 as cursor patterns, CT values, and
The contents are read out by the readout circuit 11 and sent to the display device 7 via the synthesis circuit 6, and a temperature distribution image and gray scale based on the data read out from the image memory 4 are written together with the P value. is displayed superimposed on the

In the above embodiment, the temperature range is defined as the center temperature CT and the temperature width T.
Although the temperature is defined by R, the temperature is not limited to this, and may be defined by a lower limit temperature and an upper limit temperature, or a lower limit temperature and a temperature range.

In that case, it is necessary to modify the arithmetic expression for temperature conversion as appropriate in accordance with such a method of regulation.

[Effects of the Invention] As is clear from the above description, according to the present invention, by storing grayscale data in the image data storage means of a thermography apparatus, grayscale memory and readout for displaying grayscale can be achieved. Since it is not necessary to provide a separate circuit, the configuration becomes simple, and furthermore, it becomes possible to read out the gray scale data in the image data storage means and determine the gray scale scale temperature value. Furthermore, since the temperature conversion calculation for obtaining the scale temperature value is also performed by the circuit that converts the temperature value at the cursor intersection, the configuration is further simplified.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing one embodiment of a thermography apparatus according to the present invention, FIG. 2 is a diagram for explaining a storage area of a memory, and FIGS. 3 and 4 are diagrams for explaining a conventional example. It is. DESCRIPTION OF SYMBOLS 1... Imaging unit, 2... A/D converter, 3... Writing circuit, 4... Image memory, 5.11... Reading circuit, 6... Combining circuit, 7...・Image display device, 8...
・Character memory, 9...Cursor position specification circuit,
10... Character writing circuit, 12... Temperature range designation circuit, 13... Arithmetic circuit, 14... Gradation number selection circuit. Patent applicant: JEOL Ltd. Figure 3 (αn (C) - Figure

Claims (1)

[Claims] A means for storing temperature data of pixels constituting a field of view obtained by detecting infrared rays from a subject; a reading means for reading out the temperature data stored in the memory means; and a reading means for reading out the temperature data of the subject based on the read temperature data. a display means for displaying a distribution image; a position specifying means for specifying an arbitrary position on the image of the display means; a means for sampling temperature data corresponding to a position specified by the position specifying means; temperature converting means for converting temperature data into temperature values; means for displaying the temperature values on a screen; A thermography apparatus comprising means for displaying a gray scale corresponding to a measured temperature range simultaneously with the temperature distribution image, wherein gray scale data for displaying the gray scale is stored in the storage means together with the temperature data; Gray scale data corresponding to points spaced apart by a predetermined interval on the gray scale is read from the storage means, the read gray scale data is converted into a temperature value by the temperature conversion means, and the screen is displayed along the gray scale. 1. A thermography device characterized by displaying: