RU1800655C - Device for color coding thermovision video signal - Google Patents

Abstract

The invention relates to television technology and can be used in thermal imaging systems for medical diagnostics, flaw detection and other industries. The purpose of the invention is to expand the functionality by forming black-and-white thermal imaging images, as well as displaying a color isotherm on a black-and-white thermal imaging image or image of a black-and-white isotherm on a color thermal imaging image. The analog thermovision video signal is digitized in the analog-to-digital converter 1 and digitally supplied to the first, second and third memory blocks 2-4, where each digital signal level corresponds to a corresponding color combination of the indicator 14, which is controlled from the first, second and third digital-to-analog converters 8-10 and the first, second and third video amplifiers 11-13. The digital compressor 15, together with the switches 5-7, forms the required isotherms, and the element EXCLUSIVE OR 16 is the color of the image and isotherms. 1 ill. (L C

Description

The invention relates to television technology and can be used in television systems for medical diagnostics, flaw detection and other industries.

The purpose of the invention is to expand the functionality by generating black-and-white thermal images, as well as displaying a color isotherm on a black-and-white thermal image or image of a black-and-white isotherm on a color thermal image.

The drawing shows a structural diagram of the proposed device.

The device contains an analog-to-digital converter 1, the output of which is connected to the inputs of the first, second, and third blocks 2, 3, 4 of read-only memory and to the first information inputs of the first, second, and third switches 5, b, 7, and second information inputs which are connected to the outputs of the first, second and third blocks 2, 3, 4, respectively, and the outputs are connected to the inputs of the first, second, and third digital-to-analog converters 8,9,10, the outputs of which are respectively through the first, second, and third video amplifiers 11, 12, 13 connected to the first, second and third inputs of the indicator 14. In addition, the device contains a digital comparator 15, the first input of which is connected to the output of the analog-to-digital converter 1, the output - with the first input of the EXCLUSIVE OR 16 element, the second and third inputs, respectively, with first and second control buses 17, 18. The third control bus 19 is connected to the second input of the EXCLUSIVE OR element 16, the output of which is connected to the control inputs of the first, second, and third switches 5, 6.7.

The device operates as follows.

The video signal of the thermal imager is fed to the input of the analog-to-digital converter 1. Blocks 2, 3, 4 convert the digital values of the video signal level arriving at them into the levels of one of the three primary colors (red, green, or blue) according to a law pre-recorded in them,

To obtain a thermal image without an isotherm, a logical O is supplied to the second bus 18. In this case, the output of the digital comparator 15 will always have a logical 1 ..

In order to obtain a black-and-white image on the indicator screen, logic 1 is supplied to the third bus 19.

the output of the EXCLUSIVE OR 16 element will be constantly logical O. Switches 5, b, 7 will transmit codes to their outputs from their second information inputs. All three inputs of indicator 14 will have the same signal and a grayscale black-and-white image will be formed on the screen.

To obtain a color image

0 on the screen of indicator 14, logical O is supplied to the third bus 19. In this case, the output of the EXCLUSIVE OR 16 element will always be logical 1, and the switches 5, 6, 7 will transmit On

5 their outputs are codes from their first information inputs, i.e. from the outputs of blocks 2, 3, 4. On the screen of the indicator 14, a color will be obtained in accordance with a predetermined color coding table.

0 In order to obtain a thermal image with an isotherm, logic 1 is supplied to the second bus 18, and a code corresponding to the position of the isotherm is supplied to the first bus 17. When the code at the output of the analog-to-digital converter 1 is not equal to the code on the first bus 17, logic 1 is present at the output of the digital comparator 15. In this case, black-and-white is formed on the indicator screen 14

0 or a color image depending on the logic level on the third bus 19. If the code at the output of the analog-to-digital converter 1 turns out to be equal to the code on the first bus 17, the output of the digital switch 5 will display a logical О, and at the output of the element EXCLUSIVE OR 16 the logic level is reversed, which leads to the switching of switches 5-7.

0 Thus, if the device was operating in black-and-white imaging mode, the isotherm is obtained in color, and if the thermal imaging image is in color, the isotherm is obtained in black and white. Getting

5 contrast isotherms expand the functionality of the device for the analysis of thermal images,

Claims (1)

SUMMARY OF THE INVENTION Color coding apparatus 0 video signal of the thermal imager, containing an analog-to-digital converter, the input of which is the input of the device, and the output is connected to the inputs of the memory units, the first, second, and third digital-to-digital converters, the outputs of which are connected through the first, second, and third video amplifiers to the first, second and third inputs of the indicator, characterized in that, in order to expand the functionality by forming a black-and-white thermal image, as well as a color image zootherms on a black-and-white thermal image or a black-and-white isotherm image on a color thermal image, the first, second and third switches, a digital comparator, an EXCLUSIVE OR element are introduced, and the output of the analog-to-digital converter is connected to the first information inputs of the first, second and third switches and to the first input of the digital comparator, the second and third inputs of which are connected respectively to the input 0 the first and second control buses, the output of the digital comparator is connected to the first input of the EXCLUSIVE OR element, the second input of which is connected to the entered third control bus, the output of the EXCLUSIVE OR element is connected to the control inputs of the first, second and third switches, the second information inputs of which are connected to the outputs respectively, the first, second and third blocks of read-only memory, and the outputs are connected to the inputs of the first, second and third digital-to-analog converters, respectively.