CN104240246A - Method for refine display of heat images - Google Patents
Method for refine display of heat images Download PDFInfo
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- CN104240246A CN104240246A CN201410458534.9A CN201410458534A CN104240246A CN 104240246 A CN104240246 A CN 104240246A CN 201410458534 A CN201410458534 A CN 201410458534A CN 104240246 A CN104240246 A CN 104240246A
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Abstract
The invention provides a method for refine display of heat images, and relates to a thermal imager, in particular to the method for refine display of heat images fusing infrared light and visible light. The method for refine display of the heat images is characterized in that image data are collected, images are subjected to format conversion and fused by a certain proportion, and then the images are displayed through color space conversion. By means of the method for refine display of the heat images, information of a temperature distribution image of invisible infrared radiation emitted by a target can be displayed, detail information of a visible light image of the target also can be displayed, the defect of a traditional thermal imager is overcome, and refiner heat images can be seen.
Description
Technical field
The present invention relates to thermal imaging system, especially a kind of fusion infrared light and visible ray, high-temperature part display infrared light, low temperature part display visible ray, make the comprehensive observation of user and recognize the heat picture of target device Temperature Distribution and each several part details become more meticulous display method.
Background technology
Visible images be a kind of similarity of material world objective objects, the description of vividness or description, be information carrier the most frequently used in human social activity.It represents the one of objective objects, and it contains the relevant information being described object.It is also the topmost information sources of people, according to ASSOCIATE STATISTICS, the information nearly 75% of people's acquisition is all that from vision, ancients just have " it is better to see once than hear a hundred times ", the example that " very clear " etc. are very vivid, all describes the special-effect of image in information is transmitted.Nowadays widely, such as, the photography in daily life is taken pictures, the satellite shooting etc. of the monitor and detection in commercial production and aviation field in visible images application.
Infrared is the one in sunray in numerous invisible ray, found in 1800 by British scientist He Xieer, be also called infrared emanation, sunshine prism disassembles by he, the ribbon position of various different colours placed thermometer, attempt the heating effect of the light measuring shades of colour.Found that, that thermometer be positioned at outside ruddiness heats up the fastest.Therefore obtain conclusion: in solar spectrum, must there is invisible light in the outside of ruddiness, Infrared that Here it is.Nowadays the thermal-induced imagery utilizing Infrared to obtain is widely used in every field.The parts Performance Detection of such as manufacturing, the inspection of the aspect such as the making moist of building field, heat insulation, gap, hollowing, the burning things which may cause a fire disaster, smog, the survey of life quality testing etc. of protection and monitor field, judges culprit etc.; Along with the development of science and technology, infrared thermal imaging is just playing very important effect in socioeconomic development, commercial production and social life.
The optical wavelength scope of visible ray is between 770 ~ 350 nanometers.The electromagnetic wave that wavelength is different, causes the color perception of human eye different.770 ~ 622nm, is felt as redness; 622 ~ 597nm, orange; 597 ~ 577nm, yellow; 577 ~ 492nm, green; 492 ~ 455nm, indigo look; 455 ~ 350nm, purple.Utilize ccd image sensor, the visible images of destination object can be obtained very easily.Along with industrial expansion, visible images also plays not replaceable effect in industrial development, such as checks the Micro-dimension detection of the geometric properties of industrial products, precision workpiece, shop equipment operation monitoring, building monitoring, traffic monitoring etc.
In commercial Application, visible images can find out size, the CF of target clearly, each integrated above target even parts, and the color of each parts, position and shape size, also can find out from image very clearly.But, which position of target image cannot be picked out in visible images and generate heat, the temperature distribution state of heating, also cannot judge that the temperature of which parts is higher than information such as the temperature values set.
Infrared is the electromagnetic wave that wavelength is situated between microwave and visible ray, is the long non-visible light of wavelength ratio ruddiness, and wavelength is between 760 nanometers to 1 millimeter.On solar spectrum, the wavelength of Infrared is greater than luminous ray, and wavelength is 0.75 ~ 1000 μm.Infrared can be divided into three parts, i.e. near infrared light, and wavelength is between (0.75-1) ~ (2.5-3) μm; Mid-infrared light line, wavelength is between (2.5-3) ~ (25-40) μm; Far-infrared light, wavelength is between (25-40) ~ l000 μm.Due to the existence of blackbody radiation, any object all externally carries out electromagenetic wave radiation according to the difference of temperature, and wavelength is called thermal infrared light in the part of 2.0-1000 micron.
Thermal infrared imaging be by the sensor of thermal infrared sensitivity to image objects, formed image can reflect the temperature distribution state of body surface, but the relative position at high temp objects cannot be found out in image, and surrounding environment, also cannot find out the formed shape of whole object, size, structure composition and appearance color simultaneously, and each details, the parts of such as component devices, the size of each parts, shape and relative position etc.
Phenomenon that is more unilateral for the information obtained or that observe is more unilateral, this can make user make the judgement of some mistakes, even sometimes the generation of security incident can also be caused, no matter be visible images or infrared light image, all there are respective relative merits in them, visible images can only the details of display-object and surrounding environment thereof, but it can not the Temperature Distribution on display-object surface, and infrared light thermal map can display-object Temperature Distribution phenomenon, but can not the details of display-object and surrounding environment thereof.
Summary of the invention
The limitation being exactly existing visible ray and infrared light image and showing to be solved by this invention, thering is provided a kind of folds infrared chart into visible images, while display-object and surrounding environment detailed information thereof, can also the heat picture of distribution situation of display-object surface temperature to become more meticulous the method for display.
Heat picture of the present invention become more meticulous display method, it is characterized in that the method is realized by following steps:
1), gather: by CCD camera and infrared camera synchronous acquisition visible images and infrared light heat picture, and utilize image processing module image to be converted to the image data stream of YCbCr4:2:2;
2), format conversion: utilize image decoder module, the image data stream of YCbCr4:2:2 is converted to YCbCr4:4:4 form;
3), merge: fusion treatment is carried out to visible images and infrared light heat picture, utilize cpu chip, respectively in infrared light heat picture and visible images line by line, the luminance component Y of the corresponding pixel of pointwise and chromatic component Cb, Cr, carry out computing as follows, obtain luminance component Y and chromatic component Cb, Cr of fused image pixel, operational formula is:
Y
Q=Y
IR×x%＋Y
CCD×（1－x%）
Cb
Q=?Cb
IR×y%＋Cb
CCD×（1－y%）
Cr
Q=?Cr
IR×y%＋Cr
CCD×（1－y%）
Wherein, Y
q, Cb
q, Cr
qluminance component and the chromatic component of fused image, Y
iR, Cb
iR, Cr
iRluminance component and the chromatic component of infrared light heat picture, Y
cCD, Cb
cCD, Cr
cCDbe luminance component and the chromatic component of visible images, x, y are respectively the image co-registration factor of luminance component and chromatic component;
4), color space conversion: change RGB formula according to YCrCb, by fused image
,
,
be converted to RGB color space;
5), display: the RGB colorspace data after conversion is transferred to display and shows, according to x, y fusion factor of setting, the new images after the visible images under display setting value and infrared photothermal image fusion.
Described fusion factor x, y are respectively the value of luminance component and chromatic component, and the new images after fusion, according to x, y value of setting, carries out merging, convert and showing with this ratio respectively.
Through above step, by steps such as collection, fusion, conversion and displays, by infrared light heat picture and visible images line by line, pointwise changes, visible images and infrared light heat picture merge by the ratio utilizing CPU computing chip to set according to x, y afterwards, and the image after fusion can show the meticulous picture of visible ray and the hot picture of infrared light simultaneously.
Heat picture of the present invention become more meticulous display method, can not only the temperature distribution image information of sightless infrared radiation that sends of display-object, and can also the detailed information of visible images of display-object, compensate for the deficiency of traditional thermal imaging system, the heat picture more become more meticulous can be seen.
Embodiment
Embodiment 1: a kind of heat picture become more meticulous display method, the method is realized by following steps:
1), gather: by CCD camera and infrared camera synchronous acquisition visible images and infrared light heat picture, and utilize image processing module image to be converted to the image data stream of YCbCr4:2:2;
2), format conversion: utilize image decoder module, the image data stream of YCbCr4:2:2 is converted to YCbCr4:4:4 form;
3), merge: fusion treatment is carried out to visible images and infrared light heat picture, utilize cpu chip, respectively in infrared light heat picture and visible images line by line, the luminance component Y of the corresponding pixel of pointwise and chromatic component Cb, Cr, carry out computing as follows, obtain luminance component Y and chromatic component Cb, Cr of fused image pixel, operational formula is:
Y
Q=Y
IR×x%＋Y
CCD×（1－x%）
Cb
Q=?Cb
IR×y%＋Cb
CCD×（1－y%）
Cr
Q=?Cr
IR×y%＋Cr
CCD×（1－y%）
Wherein, Y
q, Cb
q, Cr
qluminance component and the chromatic component of fused image, Y
iR, Cb
iR, Cr
iRluminance component and the chromatic component of infrared light heat picture, Y
cCD, Cb
cCD, Cr
cCDbe luminance component and the chromatic component of visible images, x, y are respectively the image co-registration factor of luminance component and chromatic component;
4), color space conversion: change RGB formula according to YCrCb, by fused image
,
,
be converted to RGB color space;
5), display: the RGB colorspace data after conversion is transferred to display and shows, according to x, y fusion factor of setting, the new images after the visible images under display setting value and infrared photothermal image fusion.
Fusion factor x, y are respectively the value of luminance component and chromatic component, and the new images after fusion, according to x, y value of setting, carries out merging, convert and showing with this ratio respectively.
Through above step, by steps such as collection, fusion, conversion and displays, by infrared light heat picture and visible images line by line, pointwise changes, visible images and infrared light heat picture merge by the ratio utilizing CPU computing chip to set according to x, y afterwards, and the image after fusion can show the meticulous picture of visible ray and the hot picture of infrared light simultaneously.
Claims (2)
1. heat picture become more meticulous display a method, it is characterized in that the method is realized by following steps:
1), gather: by CCD camera and infrared camera synchronous acquisition visible images and infrared light heat picture, and utilize image processing module image to be converted to the image data stream of YCbCr4:2:2;
2), format conversion: utilize image decoder module, the image data stream of YCbCr4:2:2 is converted to YCbCr4:4:4 form;
3), merge: fusion treatment is carried out to visible images and infrared light heat picture, utilize cpu chip, respectively in infrared light heat picture and visible images line by line, the luminance component Y of the corresponding pixel of pointwise and chromatic component Cb, Cr, carry out computing as follows, obtain luminance component Y and chromatic component Cb, Cr of fused image pixel, operational formula is:
Y
Q=Y
IR×x%＋Y
CCD×（1－x%）
Cb
Q=?Cb
IR×y%＋Cb
CCD×（1－y%）
Cr
Q=?Cr
IR×y%＋Cr
CCD×（1－y%）
Wherein, Y
q, Cb
q, Cr
qluminance component and the chromatic component of fused image, Y
iR, Cb
iR, Cr
iRluminance component and the chromatic component of infrared light heat picture, Y
cCD, Cb
cCD, Cr
cCDbe luminance component and the chromatic component of visible images, x, y are respectively the image co-registration factor of luminance component and chromatic component;
4), color space conversion: change RGB formula according to YCrCb, by fused image
,
,
be converted to RGB color space;
5), display: the RGB colorspace data after conversion is transferred to display and shows, according to x, y fusion factor of setting, the new images after the visible images under display setting value and infrared photothermal image fusion.
2. heat picture as claimed in claim 1 becomes more meticulous the method for display, it is characterized in that described fusion factor x, y are respectively the value of luminance component and chromatic component, new images after fusion, according to x, y value of setting, carries out merging, convert and showing with this ratio respectively.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105338262A (en) * | 2015-10-09 | 2016-02-17 | 浙江大华技术股份有限公司 | Thermal imaging image processing method and device |
| CN106370311A (en) * | 2016-10-21 | 2017-02-01 | 北京信息科技大学 | Temperature measuring device and measuring method for thermal analyzer |
| CN106875371A (en) * | 2017-02-09 | 2017-06-20 | 聚龙智瞳科技有限公司 | Image interfusion method and image fusion device based on Bayer format |
| CN112017252A (en) * | 2019-05-31 | 2020-12-01 | 华为技术有限公司 | Image processing method and related equipment |
-
2014
- 2014-09-11 CN CN201410458534.9A patent/CN104240246A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 李光鑫: "红外和可见光图像融合技术的研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
| 裴闯 等: "自然彩色化双通道实时图像融合系统", 《光学精密工程》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105338262A (en) * | 2015-10-09 | 2016-02-17 | 浙江大华技术股份有限公司 | Thermal imaging image processing method and device |
| CN105338262B (en) * | 2015-10-09 | 2018-09-21 | 浙江大华技术股份有限公司 | A kind of graphic images processing method and processing device |
| US10719958B2 (en) | 2015-10-09 | 2020-07-21 | Zhejiang Dahua Technology Co., Ltd. | Methods and systems for fusion display of thermal infrared and visible image |
| US11354827B2 (en) | 2015-10-09 | 2022-06-07 | Zhejiang Dahua Technology Co., Ltd. | Methods and systems for fusion display of thermal infrared and visible image |
| CN106370311A (en) * | 2016-10-21 | 2017-02-01 | 北京信息科技大学 | Temperature measuring device and measuring method for thermal analyzer |
| CN106370311B (en) * | 2016-10-21 | 2023-06-20 | 北京信息科技大学 | Temperature measuring device and method for thermal analyzer |
| CN106875371A (en) * | 2017-02-09 | 2017-06-20 | 聚龙智瞳科技有限公司 | Image interfusion method and image fusion device based on Bayer format |
| CN112017252A (en) * | 2019-05-31 | 2020-12-01 | 华为技术有限公司 | Image processing method and related equipment |
| WO2020238416A1 (en) * | 2019-05-31 | 2020-12-03 | 华为技术有限公司 | Image processing method and related device |
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