Question

matlab如何确定一个图像中不同形状物体的质心

Answer 1

clear;clc;close all
I=imread('1.jpg');
I_gray=rgb2gray(I);
level=graythresh(I_gray);

[height,width]=size(I_gray);
I_bw=im2bw(I_gray,level);

for i=1:height %%循环中进行反色
for j=1:width
if I_bw(i,j)==1
I_bw(i,j)=0;
else I_bw(i,j)=1;
end

end
end

[L,num]=bwlabel(I_bw,8);
plot_x=zeros(1,num);%%用于记录质心位置的坐标
plot_y=zeros(1,num);

for k=1:num %%num个区域依次统计质心位置
sum_x=0;sum_y=0;area=0;
for i=1:height
for j=1:width
if L(i,j)==k
sum_x=sum_x+i;
sum_y=sum_y+j;
area=area+1;
end
end
end
plot_x(k)=fix(sum_x/area);
plot_y(k)=fix(sum_y/area);
end

figure(1);imshow(I_bw);
for i=1:num
hold on
plot(plot_y(i) ,plot_x(i), '*')
end