I performed MorphologicalComponents on an image, and from there used SelectComponents to filter out my desired components. Is there a way to extract out the unique values from the entire array? i.e. get a list of the labelled component values

I tried using DeleteDuplicates, but that only works on a list, and also tried using Select with a search criteria #>0, but that didn't work out as well.

Thank you!

  • $\begingroup$ DeleteDuplicates@*Flatten? $\endgroup$ Apr 24, 2019 at 21:13
  • $\begingroup$ That works, thank you! $\endgroup$
    – Gnaprs
    Apr 24, 2019 at 21:20
  • $\begingroup$ You're welcome. Actually, you gave the answer yourself: "but that only works on a list" ;) $\endgroup$ Apr 24, 2019 at 21:23

1 Answer 1


The solution was given by Henrik:


Thank you!


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