4 connected neighbors in region growing

I have a question about a function I'm trying to write Iwant a function Neighbor4(x,y) which is a function that takes seed pixel and go through all its neighbors and check for its intensity, then find the mean for the four neighbors, if it was less that 0.1 then it will produce a new x,y with value 1 and move it to a black image of zeroes

is there a simple way someone can explain to me?

Answer 1

[Image Analyst]

Maybe you should just try grayconnected()?

Otherwise, try my attached magic wand program (like Adobe Photoshop's magic wand).