find 8 neighbours in image
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hi dears..... plz help me
how i find the 8 neighbours around the white pixels...
3 commentaires
Image Analyst
le 4 Juil 2020
Use imdilate() then and it with the original
neighbors = imdilate(bw, true(3)) & ~bw;
Réponses (2)
KSSV
le 21 Sep 2017
Read about knnsearch
I = imread('2.png') ;
I = rgb2gray(I) ;
[y,x] = find(I) ;
% 8 nearest neighbors
[ny,nx] = size(I) ;
[X,Y] = meshgrid(1:nx,1:ny) ;
% global indices
idx = knnsearch([X(:) Y(:)],[x,y],'k',8) ;
% sub indices
[i,j] = ind2sub(size(I),idx) ;
2 commentaires
Walter Roberson
le 17 Oct 2017
This code does not answer the questions "Find them in what sense? What output are you looking for?"
Mehadi Hasan
le 22 Oct 2021
I = imread('2.png') ;
I = rgb2gray(I) ;
[y,x] = find(I) ;
% 8 nearest neighbors
[ny,nx] = size(I) ;
[X,Y] = meshgrid(1:1x,1:1y) ;
% global indices
idx = knnsearch([X(:1) Y(:1)],[x,y],'k',8) ;
% sub indices
[i,j] = ind2sub(size(I),idx) ;
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