display values in a loop

i have this code to find all the centroids which objects have the specific area. however, I couldnt find a way to display the values and maybe pass the values to a variable(s). I really appreciate it if somebody could help me with some demos.

below is part of the code:

id = find([s.Area] > 1000 & [s.Area] < 100000 );

    for ii = 1:length(id);
    hold on, plot(s(id(ii)).Centroid(1),s(id(ii)).Centroid(2),'wp','MarkerSize',10,'MarkerFaceColor','r'), hold off

i want to do something like.. %disp(['Center location is (',num2str(s(id(ii)).Centroid(1),4),', ',num2str(s(id(ii)).Centroid(2),4),')'])

thanks in advance!

[David Young]

What is the problem with the code you have? I tried your suggested call to disp and it seems to work fine.

[Shi Wei Foo]

I'm not sure on that as well. been cracking my head for this. was the syntax wrong?

Answer 1

[Chandra Kurniawan]

Hello,

Here I give you my sample code

clear; clc;

I = imread('pillsetc.png');
bw = im2bw(I);
open = bwareaopen(bw,5);
SE = strel('square',5);
close = imclose(open, SE);
fill = imfill(close,'holes');
stat = regionprops(fill,'area','centroid');
id = find([stat.Area] > 1000 & [stat.Area] < 100000 );
imshow(I); hold on;
for x = 1 : length(id)
    plot(stat(id(x)).Centroid(1),stat(id(x)).Centroid(2),'ro');
    a(x) = stat(id(x)).Centroid(1);
    b(x) = stat(id(x)).Centroid(2);
    cenText = strcat('Center location is (',num2str(a(x),4),', ',num2str(b(x),4),')');
    text(a(x)-80,b(x)+20,cenText,'color','g','fontweight','bold');
    disp(cenText);
end

The x-centroid stored in variable 'a' and

the y-centroid stored in variable 'b'

Then both of figure and command window will show you the text that you want to display.

[Chandra Kurniawan]

Note : Detected objects only for 1000 < stat.area < 10000

Hope this will helps you

[Shi Wei Foo]

thank you so much it works fine!!