I strongly suspect that there should be a built-in solution to the following problem:

I have a binary image like this:

image = Binarize@ColorNegate@Graphics[{
     Disk[{0, 0}, 1],
     Disk[{-1.5, 1.5}, 0.5],
     Disk[{3, 1}, {1, 1.5}]
     }, PlotRange -> 3 {{-1, 1}, {-1, 1}}]

enter image description here

I want to process the components with functions like MorphologicalComponents and ComponentMeasurements. How can I exclude components that touch the image boundary? In this example the partially cropped ellipse should be excluded.

  • $\begingroup$ I am almost certain I have seen options for this somewhere, but I can't seem to find it in the docs. $\endgroup$ – Szabolcs Mar 11 at 16:58
  • 2
    $\begingroup$ Use DeleteBorderComponents first to remove them? $\endgroup$ – SHuisman Mar 11 at 17:06
  • 1
    $\begingroup$ @SHuisman Will you post an answer or will you vote to close as "easily found in the docs"? I really didn't find it, even knowing I've seenit. $\endgroup$ – Szabolcs Mar 11 at 17:07

Use DeleteBorderComponents first to remove them:

image = DeleteBorderComponents[image]

There is also:

ComponentMeasurements[image, ... , #AdjacentBorderCount == 0 &]
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