how to find connected neighbors?

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jenifer Ask
jenifer Ask 2019-11-13
回答： KSSV 2019-11-13
How do I find a neighbor of pixels with a neighbor whose value is 1?
(Loop to find connected neighbors)
I tried to run the operation on this code but failed
[y,x] = find(I) ;
figure
imshow(I)
hold on
plot(x,y,'.b')
i=x(100)
j=y(100)
neighbors(1) = I(i-1,j-1);
plot(i-1,j-1,'*r')
neighbors(2) = I(i-1,j);
plot(i-1,j,'*r')
neighbors(3) = I(i-1,j+1);
plot(i-1,j+1,'*r')
neighbors(4) = I(i,j-1);
plot(i,j-1,'*r')
neighbors(5) = I(i,j+1);
plot(i,j+1,'*r')
neighbors(6) = I(i+1,j-1);
plot(i+1,j-1,'*r')
neighbors(7) = I(i,j);
plot(i,j,'*r')
neighbors(8) = I(i+1,j);
plot(i+1,j,'*r')
neighbors(9) = I(i+1,j+1);
plot(i+1,j+1,'*r')

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采纳的回答

KSSV
KSSV 2019-11-13
If you know the location of the pixel..uou can use knnsearch or rangeseach. YOu can also search in mathworks, this question has been addressed multiple times.

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