temperature and gray level

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monika  SINGH
monika SINGH on 15 Apr 2019
Answered: KSSV on 16 Apr 2019
is there any relation between gray level and thermal image?
  5 Comments
monika  SINGH
monika SINGH on 16 Apr 2019
Edited: monika SINGH on 16 Apr 2019
do you have any document proving this fact?
Rik
Rik on 16 Apr 2019
No, but it seems common sense to me. If you have a temperature sensor, the value it returns should increase for increasing temperature. (unless the mapping is reversed, which should be in your camera documentation)

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Answers (1)

KSSV
KSSV on 16 Apr 2019
I hope this demo code might help you:
N = 100 ;
x = rand(N,1) ;
y = rand(N,1) ;
s = rand(N,1) ; % Say intensity
% Assign colors
the_range=range(s); % find range of data
min_val = min(s); % find maximum value of data
max_val = max(s) ; % find minimum value of data
idx = floor(((s-min_val)/the_range)*63)+1;
p = colormap(gray) ;
col = p(idx,:) ;
subplot(121)
scatter(x,y,30,col,'filled')
colorbar
subplot(122)
scatter(x,y,30,s,'filled')
colorbar

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