I want to extract the temperature from the IR image at every pixel

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Mantri Sandeep
Mantri Sandeep 2023-5-30
回答： Image Analyst 2023-5-31
This the IR image of heated tube. I want to extract the temperature at every pixel in excel sheet

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回答（3 个）

chicken vector
chicken vector 2023-5-30
You might want to take a look at imread and interp1.
Diwakar Diwakar
Diwakar Diwakar 2023-5-30
Try this code.
% Load the IR image
IR_image = imread('path_to_image.png'); % Replace 'path_to_image.png' with the actual path to your image file
% Define calibration parameters
emissivity = 0.95;
reflected_temp = 20.0;
atmospheric_temp = 25.0;
% Convert the image to temperature
T = (IR_image - reflected_temp) / emissivity + atmospheric_temp;
% Display the temperature image
imshow(T);
colorbar;
title('Temperature Image');
Image Analyst
Image Analyst 2023-5-31
You need to "undo" the colormap and get back to the original temperature image. See my File Exchange demo:
https://www.mathworks.com/matlabcentral/fileexchange/113995-thermal-image-color-to-temperature?s_tid=srchtitle

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