how to convert unit8 type images to logical type

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neha viswanath 2015-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/178621-how-to-convert-unit8-type-images-to-logical-type

评论： neha viswanath 2015-2-17

if true
    myFolder = 'E:\\inverted\\i1';
    for PicNum = 100:-1:1;
        fullFileName = fullfile(myFolder,sprintf('%d.bmp',PicNum));
        fprintf(1, 'Now reading %s\n', fullFileName);
        imageArray{PicNum}=imread(fullFileName);
        logical(imageArray{PicNum});//here im trying to convert my images to logical but its not happening
        imshow(imageArray{PicNum});  % Display image.
    end
 end

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Image Analyst 2015-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/178621-how-to-convert-unit8-type-images-to-logical-type#answer_168120

在 MATLAB Online 中打开

To convert a gray level image to a logical binary image you must threshold:

binaryImage = grayImage > someValue;

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neha viswanath 2015-2-16

thankyou sir

neha viswanath 2015-2-17

在 MATLAB Online 中打开

sir,I need to access each image in cell array.

if true
  for i=1:1:100
  feature_extractor(logicalImage{i});
end
end
so i could get features of all the images in 'ans'.with the above code i could not accomplish my task.can you please help me out.

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Adam 2015-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/178621-how-to-convert-unit8-type-images-to-logical-type#answer_168166

编辑：Adam 2015-2-16

在 MATLAB Online 中打开

imageArrayLogical = cellfun( @(im) logical(im), imageArray, 'UniformOutput', false );

or you can just do it in a for loop if you prefer. Note the result is still a cell array of your data so you still have to index into it using cell notation.