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

This the IR image of heated tube. I want to extract the temperature at every pixel in excel sheet

Answer 1

[chicken vector]

You might want to take a look at imread and interp1.

Answer 2

[Diwakar Diwakar]

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');

Answer 3

[Image Analyst]

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