matlab实例之3维图像连通性分析

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bwlabeln函数

bwlabeln - Label connected components in binary image

This MATLAB function returns a label matrix, L, containing labels for the
connected components in BW.L = bwlabeln(BW)
L = bwlabeln(BW,conn)
[L,n] = bwlabeln(___)

一个matlab 实例

clear all; clc; close all;addpath /home/dzhang/Matlab_toolbox/matlab_nifti/;
addpath /nasdisk/disk2/SleepDeprivation/voxelwise_analysis/;CutNum = 20;
corr_type = 'pearson';%% local FCD part
%% with 8AM
tmp = load_untouch_nii(['./RES/alphasim/lfcd_alphasim_NonVul_8am.nii']);
img = tmp.img;BW = double(abs(img)>0);
[L,NUM] = bwlabeln(BW,6);howmany = [];
Lcut = [];
count = 1;
for p = 1:NUMhowmany = length(find(L(:)==p)); if howmany < CutNumimg(find(L==p)) = 0; end
endtemp = load_untouch_nii('temp4.nii');
temp.hdr.dime.dim(6) = 1;
temp.img = zeros(61,73,61);
temp.img(:) = img;   
save_untouch_nii(temp,['./RES/alphasim/lfcd_alphasim_NonVul_8am_cut.nii']);  

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