Error when exporting ground truth from Image Labeler for Semantic Segmentation

Hi,

I have created a project with the Image Labeler app in which I labeled pixels in several MRI images (files attached - three labels per image, each pixel in each image should have been labeled correctly, image size varies) When I proceed to export the ground truth variable/file I receive the following error:

Warning: Error occurred while executing the listener callback for event
ExportWithSaveAndSyncEvent defined for class
vision.internal.labeler.multiUser.view.View:
Error using fileparts
Input must be a row vector of characters, or a string scalar, or a cellstr,
or a string matrix.

Error in
vision.internal.labeler.multiUser.model.project.ProjTaskUtil.createPixelLabelFilePath

Error in
vision.internal.labeler.multiUser.model.project.ProjTaskUtil/generatePixLabelFilenamesWpath

Error in
vision.internal.labeler.multiUser.model.project.Project/copyWithRename

Error in
vision.internal.labeler.multiUser.model.project.Project/exportSDonly_allImages_SUP

Error in vision.internal.labeler.multiUser.model.project.Project/exportSUP

Error in
vision.internal.labeler.multiUser.model.project.Project/exportWithSaveAndSync

Error in
vision.internal.labeler.multiUser.model.ProjectFileModel/exportWithSaveAndSync

Error in
vision.internal.labeler.multiUser.controller.ProjectFileController/exportWithSaveAndSyncEventCallback

Error in
vision.internal.labeler.multiUser.controller.ProjectFileController>@(varargin)this.exportWithSaveAndSyncEventCallback(varargin{:})

Error in vision.internal.labeler.multiUser.view.View/exportData

Error in
vision.internal.imageLabeler.multiUser.controller.ImageLabelerToolMultiUser>@(evtSrc,evtData)exportData(this.View,evtData)

Error in
vision.internal.labeler.multiUser.model.ProjectSessionModel/exportSingleUserSessionData

Error in
vision.internal.labeler.multiUser.model.ProjectSessionModel/packSingleUserExportData

Error in
vision.internal.imageLabeler.multiUser.controller.ImageLabelerToolMultiUser>@(evtSrc,evtData)packSingleUserExportData(this.Session,evtData)

Error in vision.internal.labeler.multiUser.view.View/exportButtonClicked

Error in vision.internal.labeler.multiUser.view.View

Error in
vision.internal.imageLabeler.multiUser.view.ImageLabelerToolstrip/exportLabelsFromAllImages

Error in vision.internal.imageLabeler.multiUser.view.ImageLabelerToolstrip

Error in matlab.ui.internal.toolstrip.ListItem/ActionPerformedCallback (line
143)
this.notify('ItemPushed');

Error in
matlab.ui.internal.toolstrip.base.Control>@(event,data)ActionPerformedCallback(this,event,data)
(line 336)
this.ActionPerformedListener = addlistener(this.Action,
'ActionPerformed', @(event, data) ActionPerformedCallback(this,
event, data));

Error in matlab.ui.internal.toolstrip.base.Action/PeerEventCallback (line
859)
this.notify('ActionPerformed', eventdata);

Error in
matlab.ui.internal.toolstrip.base.ActionInterface>@(event,data)PeerEventCallback(this,event,data)
(line 41)
this.PeerEventListener = addlistener(this.Peer, 'peerEvent',
@(event, data) PeerEventCallback(this, event, data));

Error in
viewmodel.internal.factory.ManagerFactoryProducer>@(src,event)callback(src,viewmodel.internal.factory.ManagerFactoryProducer.convertStructToEventData(event))
(line 79)
proxyCallback = @(src, event)callback(src, ...
    > In vision.internal.labeler.multiUser.view/View/exportData
In vision.internal.imageLabeler.multiUser.controller.ImageLabelerToolMultiUser>@(evtSrc,evtData)exportData(this.View,evtData)
In vision.internal.labeler.multiUser.model/ProjectSessionModel/exportSingleUserSessionData
In vision.internal.labeler.multiUser.model/ProjectSessionModel/packSingleUserExportData
In vision.internal.imageLabeler.multiUser.controller.ImageLabelerToolMultiUser>@(evtSrc,evtData)packSingleUserExportData(this.Session,evtData)
In vision.internal.labeler.multiUser.view/View/exportButtonClicked
In vision.internal.labeler.multiUser.view.View
In vision.internal.imageLabeler.multiUser.view/ImageLabelerToolstrip/exportLabelsFromAllImages
In vision.internal.imageLabeler.multiUser.view.ImageLabelerToolstrip
In matlab.ui.internal.toolstrip/ListItem/ActionPerformedCallback (line 143)
In matlab.ui.internal.toolstrip.base.Control>@(event,data)ActionPerformedCallback(this,event,data) (line 336)
In matlab.ui.internal.toolstrip.base/Action/PeerEventCallback (line 859)
In matlab.ui.internal.toolstrip.base.ActionInterface>@(event,data)PeerEventCallback(this,event,data) (line 41)
In viewmodel.internal.factory.ManagerFactoryProducer>@(src,event)callback(src,viewmodel.internal.factory.ManagerFactoryProducer.convertStructToEventData(event)) (line 79)

I'm attaching all related files; you should be able to open them with the Image Labeler without problem.

NOTE: while labeling the images in the Image Labeler I removed a few images that were found not to be relevant for the problem at hand. So the original set of images is actually larger than the labeled one.

Any idea of what the issue might be?

Many thanks,

Jacopo

[Elymer]

I am also experiencing the same problem

[Jacopo Biasetti]

Hi Elymer,

I contacted Mathworks and they found that this is an actual bug. It will be fixed in a new release.

Best,

Jacopo

[Gustavo Liñan]

I've got the same error, it's a shame that after expending hours in the labelling, one gets this unacceptable behavior of a licensed tool.

[Jacopo Biasetti]

Hi Gustavo,

Mathworks has provided me with a temporary patch for this particular problem. You might want to contact Support and check if they can help you with this.

Best,

Jacopo

[Godwin Theckineth]

Is there a temporary work around for this issue without having to redo the labelling?

[Jacopo Biasetti]

Yes. MATLAB support provided me with a temporary fixed. I suggest to contact them directly.

Best of luck,

Jacopo

Answer 1

[Yoga]

Hi @Jacopo Biasetti !

This is a known bug happening in Image Labeler App in MATLAB R2023a. After labelling the data and trying to export them, the error will show up.

This issue will be fixed in one of MATLAB's future releases.