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Sequence of decomposed structuring elements

getsequence will be removed in a future release. See strel for the current list of methods.


SEQ = getsequence(SE)


SEQ = getsequence(SE) returns the array of structuring elements SEQ, containing the individual structuring elements that form the decomposition of SE. SE can be an array of structuring elements. SEQ is equivalent to SE, but the elements of SEQ have no decomposition.

Class Support

SE and SEQ are arrays of STREL objects.


The strel function uses decomposition for square structuring elements larger than 3-by-3. Use getsequence to extract the decomposed structuring elements.

se = strel('square',5)
se =
Flat STREL object containing 25 neighbors.
Decomposition: 2 STREL objects containing a total of 10 neighbors

     1     1     1     1     1
     1     1     1     1     1
     1     1     1     1     1
     1     1     1     1     1
     1     1     1     1     1

seq = getsequence(se)
seq =
2x1 array of STREL objects

Use imdilate with the 'full' option to see that dilating sequentially with the decomposed structuring elements really does form a 5-by-5 square:


Introduced before R2006a

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