-
Notifications
You must be signed in to change notification settings - Fork 22
/
sizeOfObject.m
40 lines (37 loc) · 1.42 KB
/
sizeOfObject.m
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
32
33
34
35
36
37
38
39
40
function [size_descend,ind] = sizeOfObject(img, conn)
% [size_descend,ind] = sizeOfObject(img, conn)
%
% Compute the size of each connected component in binary image and sort the
% size in descending order.
% Input: img--2D or 3D binary image;
% conn--connectivity defined by the user. It can have the following
% value:
% Value Meaning
% Two-dimensional connectivities
% 4 4-connected neighborhood
% 8 8-connected neighborhood
% Three-dimensional connectivities
% 6 6-connected neighborhood
% 18 18-connected neighborhood
% 26 26-connected neighborhood
% The default connectivity is 8 for 2D, and 26 for 3D.
% Output: size_descend--size of each connected component in descending
% order
% ind--index of sorted connected component
%
% (c) Yu Huang (Andy), May 2011
% The Neural Engineering Lab, Dept. of Biomedical Engineering, City College of New York
% Send bugs to [email protected]
if nargin < 2
if ndims(img) == 2
conn = 8;
elseif ndims(img) == 3
conn = 26;
end
end
CC = bwconncomp(img,conn);
size_obj = zeros(1,CC.NumObjects);
for k = 1:CC.NumObjects
size_obj(k) = length(CC.PixelIdxList{k});
end
[size_descend,ind] = sort(size_obj,'descend');