RAW image radiation temperature measuring apparatus and method

Abstract

The invention discloses a RAW image radiation temperature measuring method. The method comprises the following steps: a CCD camera outputting image data in a RAW format, and storing the data as a true color RGB image after linearity interpolation; arranging the exposure time of the CCD camera through RAW image gray scale signals obtained from the image data in the RAW format; and extracting a spectral color value of each channel from the true color RGB image; obtaining image detection data from ratios of the spectral color values to the exposure time; taking a conversion proportion coefficient, calibrated through a black-body furnace, between the image detection data and incident radiation intensity, as a calibration constant; through the CCD camera, continuously acquiring radiation images, and extracting spectral color signals and exposure time signals of any two channels in pixels R, G or B; and performing correction through the calibration constant to form correspondingly extracted monochromatic radiation intensity signals under the condition of two primary wavelengths, and according to a colorimetric temperature measurement principle, obtaining an image temperature and a radiation ratio. The temperature measuring apparatus provided by the invention comprises the CCD camera, a stiff rod endoscope, a network switch and a background server.

Description

technical field [0001] The invention relates to radiation image temperature measurement technology, in particular to a RAW image radiation temperature measurement device and method thereof. Background technique [0002] The radiation image temperature measurement method based on the principle of multispectral colorimetry is simple in principle (CN101476939, a dual-CCD temperature field measuring device and method; CN200920107971, a multispectral radiation temperature measurement device based on color CCD; CN201210417758, a measurement target Radiation temperature measurement method and instrument for real temperature), the bottleneck restricting its popularization and application lies in the dynamic response range of the measuring element, which mainly covers two aspects: 1) Responding to the gradient change of flame brightness, that is, taking into account whether the signal is too strong or too weak, determined by each 2) Responding to flame radiation at different temperat...

AI Technical Summary

Problems solved by technology

The high number of digits of RAW data can expand the numerical range of each spectral color channel, thereby improving its relative distribution, but in terms of the absolute quantity limit of each spectral color, the temperature measurement process is still restricted by the shutter speed of the camera

Moreover, in the traditional radiation image temperature measurement method, the shutter speed of each camera needs to be calibrated separately, and the calibration constants at different shutter speeds can be obtained by fitting, and the selected shutter speed must be consistent with the calibration process, which is extremely important. Increased the complexity of the calibration process and restricted the application range of the radiation temperature measurement method

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