Approximate Entropy Calculation for an Image
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shishir
el 29 de Jun. de 2015
Respondida: Maria da Luz
el 29 de Abr. de 2024
Hi,
How can we compute the APPROXIMATE ENTROPY of an IMAGE.
Please help,
Thanks
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Respuesta aceptada
Thorsten
el 29 de Jun. de 2015
function E = entropy(I)
% Assume I in the range 0..1
p = hist(I(:), linspace(0,1,256)); % create histogram
p(p==0) = []; % remove zero entries that would cause log2 to return NaN
p = p/numel(I); % normalize histogram to unity
E = -sum(p.*log2(p)); % entropy definition
3 comentarios
Thorsten
el 29 de Jun. de 2015
Marcus Tan
el 25 de Jul. de 2021
Can someone guide me also how to calculate the approximate entropy of an Spectrogram image transformed from EEG signal? I have seen number of file exchange but none of them work.
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Maria da Luz
el 29 de Abr. de 2024
Como recortar a região de interrese dessa imagem que neste caso é a mandibula.só a parte branca
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