Applies nonmaximal suppression to a list.
See nonMaxSupr for more information. Has the same effect as nonMaxSupr
except it operates on a list of position/values pairs. Running time is
n^2 in the number of such pairs. For comparison running time of
nonMaxSupr is ord( sum( size(I,d)*radii(d) ).
This function has an additional parameter - flag. If flag==1, then all
locations that are not strictly the biggest in their window are
suppressed (ie, keeps max only if it is UNIQUE). This can be useful for
large flat regions -- nonMaxSupr(ones(30),3) does no suppression since
all values are equal in each window, but nonMaxSuprList(ones(30),3) w
flag==1 suppresses all locations. If flag==2 ties are broken randomly (in
fact this allows for slightly faster execution).
USAGE
[subs,vals,keep] = nonMaxSuprList( subs, vals, radii, ...
[thresh], [maxn], [flag] )
INPUTS
subs - subscripts of point locations (m x d)
vals - values at point locations (m x 1)
radii - suppression window dimensions
thresh - [] minimum value below which not to look for (or [])
maxn - [] return at most maxn of the largest vals
flag - [] suppress equal vals (see above)
OUTPUTS
subs - subscripts of non-suppressed point locations (n x d)
vals - values at non-suppressed point locations (n x 1)
keep - indicies of kept locations from subs (n x 1)
EXAMPLE
See also SUBSTOARRAY, NONMAXSUPR, NONMAXSUPRWIN
Piotr's Computer Vision Matlab Toolbox Version 2.12
Copyright 2014 Piotr Dollar. [pdollar-at-gmail.com]
Licensed under the Simplified BSD License [see external/bsd.txt]