How obtain coordinates of pixels within bwboundaries for each object?

Suppose I have an image

and then I use the code below

I=imread("image.bmp");
    imshow(I); hold on; [B,L,N] = bwboundaries(I);
    for k=1:length(B),
    	boundary = B{k};
    	plot(boundary(:,2), boundary(:,1),'.r')
    end

The boundaries then look like

However, I don't just want the x,y coordinates of each pixel ON the boundaries. I also want the x,y coordinates of each pixel INSIDE the boundaries also. That is, I want to store the row/column numbers for each object in separate matrices. So I want a matrix `A1` that should store the row/column numbers for the white pixels in the big object, and a matrix `A2` that should store the row/column numbers for the white pixels in the circular object

Is there a way to do this in Matlab?

[darova]

Use rgb2gray(), im2bw(), bwlabel()

Answer 1

[KALYAN ACHARJYA]

Code for find the pixels of two withe segmented objects

(Larger is object1 and circular object2)

%Image raed, ensure that image_bw is the binary image
image_bw=im2bw(rgb2gray(imread('image5.png')));
%Extration largest 1 blob only
object1=bwareafilt(image_bw,1);
% Find the rows and colums of object1
[rows_obj1,rows_obj1]=find(object1);
% Find second object
object2=image_bw & imcomplement(object1);
[rows_obj2,cols_obj2]=find(object2);

% Now use the rows_obj1 & rows_obj1 as you want
% Also rows_obj2 & cols_obj2
matrix_A1=[rows_obj1 rows_obj1];
matrix_A2=[rows_obj2 rows_obj2];

[asdf]

what if I have more than 2 objects? how should I modify this code?

[KALYAN ACHARJYA]

As you asked for individual matrices for each segmented part(blobs), any image having more number of segmented blobs, you must separate indivually and apply the same.