closing(w, r, ...) ## S3 method for class 'owin': closing(w, r, \dots, polygonal=NULL) ## S3 method for class 'ppp': closing(w, r, \dots, polygonal=TRUE) ## S3 method for class 'psp': closing(w, r, \dots, polygonal=TRUE)
"owin"or a line segment pattern (object of class
"psp") or a point pattern (object of class
as.maskcontrolling the pixel resolution, if a pixel approximation is used
polygonal=TRUE) or a pixel grid approximation (
r > 0, an object of class
"owin"representing the closed region. If
r=0, the result is identical to
For a small radius $r$, the closing operation has the effect of smoothing out irregularities in the boundary of $W$. For larger radii, the closing operation smooths out concave features in the boundary. For very large radii, the closed set $W*$ becomes more and more convex.
openingfor the opposite operation.
erosion for the basic
as.owin for information about windows.
data(letterR) v <- closing(letterR, 0.25, dimyx=256) plot(v, main="closing") plot(letterR, add=TRUE)
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