feature extraction for MRI image
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farheen asdf
am 21 Jun. 2015
Kommentiert: Image Analyst
am 6 Dez. 2022
hi. I want to extract features for analyzing an image. I have extracted 8 basic features such as energy, homogeneity, contrast, skewness, correlation, variance etc. What other features can i use for image classification? My image is a cancer MRI. Thanks in advance. Have a nice day :)
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Rafee Muhammad
am 11 Feb. 2019
%% Image Read
[filename, pathname] = uigetfile({'*.jpg'; '*.bmp'; '*.tif'; '*.gif'; '*.png'; '*.jpeg'}, 'Load Image File');
brainImg = imread([pathname filename]);
subplot(231);imshow(brainImg);title('Input image','FontSize',20);
%% preprocessing
[m n c] = size(brainImg);
if c == 3
brainImg = rgb2gray(brainImg);
end
[ brainImg ] = Preprocess( brainImg );
subplot(232);imshow(brainImg);title('preprocessed image','FontSize',20);
%% Convert To Binary
img2 = im2bw(brainImg);
%% Feature Extraction
signal1 = img2(:,:);
[cA1,cH1,cV1,cD1] = dwt2(signal1,'db4');
[cA2,cH2,cV2,cD2] = dwt2(cA1,'db4');
[cA3,cH3,cV3,cD3] = dwt2(cA2,'db4');
DWT_feat = [cA3,cH3,cV3,cD3];
G = pca(DWT_feat);
whos DWT_feat
whos G
g = graycomatrix(G);
stats = graycoprops(g,'Contrast Correlation Energy Homogeneity');
Contrast = stats.Contrast;
Correlation = stats.Correlation;
Energy = stats.Energy;
Homogeneity = stats.Homogeneity;
Mean = mean2(G);
Standard_Deviation = std2(G);
Entropy = entropy(G);
RMS = mean2(rms(G));
%Skewness = skewness(img)
Variance = mean2(var(double(G)));
a = sum(double(G(:)));
Smoothness = 1-(1/(1+a));
Kurtosis = kurtosis(double(G(:)));
Skewness = skewness(double(G(:)));
2 Kommentare
Emma Stone
am 10 Nov. 2020
Bearbeitet: Emma Stone
am 10 Nov. 2020
Hello Sir,
in your code we don't have information about preprocess function ,it gives error in below line, would you suggest me whats the issue!
[ brainImg ] = Preprocess( brainImg );
thanks
Priyanka Matta
am 20 Mai 2021
Hello Rafee,
I tried your code for extracting features in a IVUS image.
It worked very well.
thanks
farheen asdf
am 2 Jul. 2015
2 Kommentare
Image Analyst
am 2 Jul. 2015
I don't use Neural Networks. I've added the Product Neural Network Toolbox above, so maybe Greg Heath will see it and answer you.
Foading Leonce
am 10 Mär. 2019
Bearbeitet: Image Analyst
am 5 Dez. 2022
But in your code we don't have information about preprocess function in this line:
[ brainImg ] = Preprocess( brainImg );
Please supply that function. Thanks. 🙂
2 Kommentare
Image Analyst
am 5 Dez. 2022
@Foading Leonce and @Fatima you might be able to get away without even using that line of code. We don't know what he did. Maybe it was just something you don't need to do, like cropping his image. Try it without that line of code (comment it out) and see how it works.
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