Can I speed up the Image Labeler by skipping the thumbnails?

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The imageLabeler app goes through the whole imageDatastore once at startup in order to create thumbnails of the images. This causes the startup to take a long time, especially if the imageDatastore has many files and/or each read operation takes a long time.
Is it possible to skip the thumbnail creation, or have it run some sort of faster preview function for the thumbnail creation?

Accepted Answer

Matthew Fall
Matthew Fall on 6 Jul 2022
I was able to do this by using dbstack in my imageDatastore readFcn to check
ismember('HorizontalImageStrip.createThumbnail', {dbstack().name})
This allowed me to check when the Image Labeler was calling my imageDatastore in order to create thumbnails. I then had my readFcn do something different (specifically, I made it return an image of the file name)

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