Getting error when using Image Labeler App, need help (R2020a)

Whenever I open the Image Labeler App and try to load images, I get the follwing error message:

Error using vision.internal.labeler.tool.Layout/hideTabXCloseButton

Java exception occurred:

java.lang.ClassCastException: java.lang.Character cannot be cast to java.lang.String

at com.mathworks.widgets.desk.DTOccupant.getName(DTOccupant.java:373)

at com.mathworks.widgets.desk.Desktop.clientMatches(Desktop.java:6443)

at com.mathworks.widgets.desk.Desktop.getDTClient(Desktop.java:6380)

at com.mathworks.widgets.desk.Desktop.getClient(Desktop.java:815)

Warning: Error occurred while evaluating listener callback.

Error using vision.internal.imageLabeler.tool.ImageLabelerTool/appendImage

Undefined function 'appendImage' for input arguments of type 'struct'.

How can I fix this?

Answer 1

[Bhargavi Maganuru]

This is an existing bug in 2020a. The file names must have at least two characters or two digits. As a workaround, if the file name is 1.jpg then rename it to 01.jpg.

[Jeeva Rajan]

yes , it worked,Thanks, i had been struggling for 4 hours. installing java and other solutions

[sudha vaiyapuri]

yes, it worked. Thank you

Answer 2

[Bhargavi Maganuru]

Hi,

You can load unlabeled images data into Image Labeler app from a folder, images stored in datastore, or from a labeler session. Make sure that images must be readble by imread

[Jeeva Rajan]

Error using vision.internal.labeler.tool.Layout/hideTabXCloseButton

Java exception occurred:

java.lang.ClassCastException

Warning: Error occurred while evaluating listener callback.

getting the same error,but not resolves

[Bhargavi Maganuru]

Can you mention the version of MATLAB you're using and share the dataset you're using if possible?

[Jeeva Rajan]

2020a

[Jeeva Rajan]

even if i use imds to load the dataset, i am getting the error.i am uisng 50 images captured from webcam of size 480x640x3

Error using vision.internal.labeler.tool.Layout/hideTabXCloseButton

Java exception occurred:

java.lang.ClassCastException

[Bhargavi Maganuru]

'even if i use imds to load the dataset', does imds means imageDatastore? Are you able to read images with imread ?

[Jeeva Rajan]

yes i can read the image with imread, yes i have used imageDatastore