I am getting error in function imds=imageDatastore(fullfile(rootFolder, categories), 'LabelSource', 'foldernames'); why?
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i am getting an error for above code in matlab 2016a
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Answers (2)
Walter Roberson
on 1 Jun 2016
You removed some of the code that is needed to download data. Go back to http://www.mathworks.com/examples/matlab-computer-vision/mw/vision_product-DeepLearningImageClassificationExample-image-category-classification-using-deep-learning and pull out the entire code.
In particular you need the lines
if ~exist(outputFolder, 'dir') % download only once
disp('Downloading 126MB Caltech101 data set...');
untar(url, outputFolder);
end
and
% Location of pre-trained "AlexNet"
cnnURL = 'http://www.vlfeat.org/matconvnet/models/beta16/imagenet-caffe-alex.mat';
and
if ~exist(cnnMatFile, 'file') % download only once
disp('Downloading pre-trained CNN model...');
websave(cnnMatFile, cnnURL);
end
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Arthur
on 6 Apr 2018
Consider to adapt your code to:
path = char(path) %pass to this variable your complet data set path
categories = {'airplanes', 'ferry', 'laptop'};
imds = imageDatastore(fullfile(path, categories), 'LabelSource', 'foldernames');
tbl = countEachLabel(imds);
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