Images not performing all functions inside for loop!!

Question

Tinna Armasamy 2017-5-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341470-images-not-performing-all-functions-inside-for-loop

评论： Tinna Armasamy 2017-5-23

This is my coding done to read all images from a folder and allow each image to perform a list of feature extraction function and then export each value to excel sheet. But unfortunately my coding shoes value of m = 16(no of images in the folder) but only gives values for one image. Only 6 values(6 features extracted) is exported to excel sheet instead of 96 values. How do i fix this?

Dir = 'C:\Users\Administrator\Desktop\Tinna\PROJECT\soil_jpg\DataSet';
images = dir(fullfile(Dir,'*.jpg'));
for m = 1 : length(images)
      Img = imread(fullfile(Dir,images(m).name));
      Img = imadjust(Img,stretchlim(Img));
      Img = imresize(Img,[256,256]);
      hsvHist = hsvHistogram(Img);
      autoCorrelogram = colorAutoCorrelogram(Img);
      color_moments = colorMoments(Img);
      % for gabor filters we need gray scale image
      img = double(rgb2gray(Img))/255;
      [meanAmplitude, msEnergy] = gaborWavelet(img, 4, 6); % 4 = number of scales, 6 = number of orientations
      wavelet_moments = waveletTransform(Img);
       Feature_Vector = [hsvHist autoCorrelogram color_moments meanAmplitude msEnergy wavelet_moments];
      whos Feature_Vector
      F1 = mean2(hsvHist(:));
      F2 = mean2(autoCorrelogram(:));
      F3 = mean2(color_moments(:));
      F4 = mean2(meanAmplitude(:));
      F5 = mean2(msEnergy(:));
      F6 = mean2(wavelet_moments(:));
end
xlswrite('testdata.xlsx',[F1 F2 F3 F4 F5 F6]);

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Answer 1

KSSV 2017-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/341470-images-not-performing-all-functions-inside-for-loop#answer_268013

编辑：KSSV 2017-5-23

在 MATLAB Online 中打开

You are savin gonly the last image features, you need to save all the image features into a cell/matrix.

Dir = 'C:\Users\Administrator\Desktop\Tinna\PROJECT\soil_jpg\DataSet';
images = dir(fullfile(Dir,'*.jpg'));
F1 = cell(length(images),1) ;
F2 = cell(length(images),1) ;
F3 = cell(length(images),1) ;
F4 = cell(length(images),1) ;
F5 = cell(length(images),1) ;
F6 = cell(length(images),1) ;
for m = 1 : length(images)
    Img = imread(fullfile(Dir,images(m).name));
    Img = imadjust(Img,stretchlim(Img));
    Img = imresize(Img,[256,256]);
    hsvHist = hsvHistogram(Img);
    autoCorrelogram = colorAutoCorrelogram(Img);
    color_moments = colorMoments(Img);
    % for gabor filters we need gray scale image
    img = double(rgb2gray(Img))/255;
    [meanAmplitude, msEnergy] = gaborWavelet(img, 4, 6); % 4 = number of scales, 6 = number of orientations
    wavelet_moments = waveletTransform(Img);
    Feature_Vector = [hsvHist autoCorrelogram color_moments meanAmplitude msEnergy wavelet_moments];
    whos Feature_Vector
    F1{m} = mean2(hsvHist(:));
    F2{m} = mean2(autoCorrelogram(:));
    F3{m} = mean2(color_moments(:));
    F4{m} = mean2(meanAmplitude(:));
    F5{m} = mean2(msEnergy(:));
    F6{m} = mean2(wavelet_moments(:));
end
xlswrite('testdata.xlsx',[F1 F2 F3 F4 F5 F6]);