Description Usage Arguments Value Author(s) See Also Examples
The rmObjects
functions deletes objects from an image
by setting their pixel intensity values to 0.
reenumerate
re-enumerates all objects in an image from 0 (background)
to the actual number of objects.
1 2 3 | rmObjects(x, index, reenumerate = TRUE)
reenumerate(x)
|
x |
An |
index |
A numeric vector (or a list of vectors if |
reenumerate |
Logical, should all the objects in the image be re-indexed afterwards (default). |
An Image
object or an array, containing the new objects.
Oleg Sklyar, osklyar@ebi.ac.uk, 2006-2007
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | ## make objects
x = readImage(system.file('images', 'shapes.png', package='EBImage'))
x = x[110:512,1:130]
y = bwlabel(x)
## number of objects found
max(y)
display(normalize(y), title='Objects')
## remove every second letter
objects = list(
seq.int(from = 2, to = max(y), by = 2),
seq.int(from = 1, to = max(y), by = 2)
)
z = rmObjects(combine(y, y), objects)
display(normalize(z), title='Object removal')
## the number of objects left in each image
apply(z, 3, max)
## perform object removal without re-enumerating
z = rmObjects(y, objects, reenumerate = FALSE)
## labels of objects left
unique(as.vector(z))[-1L]
## re-index objects
z = reenumerate(z)
unique(as.vector(z))[-1L]
|
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