How can I tune the threshold in majority operation

instenr_asds - 2022-02-24T12:55:08+00:00

Question: How can I tune the threshold in majority operation

How can I tune the threshold in majority operation with BWMORPH in Image Processing Toolbox 6.1 (R2009a)? The majority action in BWMORPH sets a pixel to 1 if five or more pixels in its 3-by-3 neighborhood are 1s; otherwise, it sets the pixel to 0.   I would like to do it with a number different from five.

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Expert Answer

John Michell answered . 2025-11-20

function Result = MyBWMorph (BW, n)

f = @(x) (sum(x(:)) >= n);

lut = makelut(f,3);

Result = applylut (BW, lut);

This function sets a pixel from the BW image to 1 if 'n' or more pixels in its 3-by-3 neighborhood are 1, otherwise, it sets the pixel to 0.

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