MATLAB: Why I have Error using pixelLabelImageDatastore on Matlab_r1018b

matlab2018_computervisiontoolbox

I have the problem below: Error using pixelLabelImageDatastore The specified superclass 'matlab.io.datastore.MiniBatchable' contains a parse error, cannot be found on MATLAB's search path, or is shadowed by another file with the same name.

Best Answer

I've figured out the problem. I had the Computer Vision toolbox installed but not the Deep Learning Toolbox. Make sure both toolboxes are installed and the error will probably go away.

Related Solutions

MATLAB: Error : Undefined function or variable “pixelLabelImageDatastore”

The only solution is to upgrade to R2018a or later.

MATLAB: Error Combining two pixelLabelImageDatastores or randomPatchExtractionDatastores

The error "Duplicate table variable name:" w.r.t combining certain datastores is a known issue and it might be addressed in the future releases.

In order to get the similar behaviour of combine (like that of imageDatastore or pixelLabelDatastore) the workaround would be that you'll need to put the output in a cell by using transform on your pixelLabelImageDatastore.

dataSetDir = fullfile(toolboxdir('vision'),'visiondata','triangleImages');
imageDir = fullfile(dataSetDir,'trainingImages');
labelDir = fullfile(dataSetDir,'trainingLabels');
imds1 = imageDatastore(imageDir);
imds2 = imageDatastore(imageDir);
classNames = ["triangle","background"];
labelIDs   = [255 0];
pxds1 = pixelLabelDatastore(labelDir,classNames,labelIDs);
pxds2 = pixelLabelDatastore(labelDir,classNames,labelIDs);
pids1 = pixelLabelImageDatastore(imds1,pxds1);
pids2 = pixelLabelImageDatastore(imds2,pxds2);
imdsc = combine(imds1,imds2);
pxdsc = combine(pxds1,pxds2);
tpids1 = transform(pids1, @(x){x});
tpids2 = transform(pids2, @(x){x});
pidsc = combine(pids1,pids2);
tpidsc = combine(tpids1,tpids2);
%% Check the behaviour of combine for each type of datastore
read(imds1)
read(imdsc)
read(pxds1)
read(pxdsc)
read(pids1)
read(tpids1)
read(tpidsc)

Best Answer

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MATLAB: Error : Undefined function or variable “pixelLabe​lImageData​store”

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Related Question

MATLAB: Error : Undefined function or variable “pixelLabelImageDatastore”

MATLAB: Error Combining two pixelLabelImageDatastores or randomPatchExtractionDatastores