what this function do?
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function inputs = getBatchHdd(imdb, batch)
args_data = [{imdb.images.data(batch)} imdb.args];
noise = imdb.images.noise(:,:,:, batch);
label0 = imdb.images.label0(:,:,:, batch);
label1 = imdb.images.label1(:,:,:, batch);
data = vl_imreadjpeg(args_data{:});
data = data{1}/255*2-1; % set in the range of [-1:1]
if (imdb.gpus == true)
noise = gpuArray(noise);
data = gpuArray(data);
label0 = gpuArray(label0);
label1 = gpuArray(label1);
end
inputs = ({'noise', noise, 'data', data, 'label0',label0 'label1',label1} );
return;
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Walter Roberson
2018년 3월 25일
편집: Walter Roberson
2018년 3월 25일
It pre-processes the data for the given batch number to scale it to [-1 +1], and creates a cell array with the corresponding noise array, data, and two label entries. If the gpus option is set it creates those arrays on the GPU. Oh, and it looks like it might read the image from disk along the way.
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Walter Roberson
2018년 3월 26일
The function does not add noise: it retrieves a noise array that has already been calculated during the database creation. The noise will not be added to the data until later in the processing.
The noise array is created in src/cnn_train_dag_dcgan as
imdb.images.noise = single(randn(1, 1, 100, imdb.nSample, 'single'));
The surrounding comments indicate that the noise is pre-created for the purposes of reproducibility.
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