How to get the coordinates of each room in a floor plan image through object identification method?

I have a floor plan image which contains objects and walls. I removed all the objects in it so it now contains only walls. Now I want to get the coordinates of each room. I am new to this platform. Can somebody please help me how to get the coordinates of each room? Or Can I get the end points of each line segment? This is the code.   function [bbox_loc,sign_objects,index1,st,furniture]=classify_objects_test1(I1) % clear all; % clc; % close all; I_initial=imread("C:\\Users\\User\\Desktop\\tkinter_codes\\floorplans\\ROBIN\\Dataset_3roomsmall\\Cat1_1.jpg"); %I_initial = imread('room_4.png'); I=I_initial; imshow(I); SE = strel('square',10); I = imdilate(I,SE); SE = strel('square',10); I = imerode(I,SE); wall_image=I; wall = I; I=I_initial; wall=im2bw(wall); imshow(wall); I=im2bw(I); I=imcomplement(I); wall = imcomplement(wall); I=I-wall; % imshow(I); I=imcomplement(I); SE = strel('square',1); IM2 = imdilate(I,SE); IM2 = I; IM2 = imerode(IM2,SE); imwrite(IM2,'fl_0sym.tif'); se1=strel('square',8); intm1=imerode(IM2,se1); se2=strel('square',4); intm2=imdilate(intm1,se2); intm3=imdilate(intm2,se2); imwrite(intm3,'fl_0sym1.tif'); I = imread('fl_0sym1.tif'); I = imcomplement(I); J = imfill(I); J = ~J; imwrite(J,'blb_0_1.jpg'); figure=I_initial; [m,n] = size(figure); figure1 = figure(:,:,[1 1 1]); figure = im2bw(figure); [m,n] = size(figure); image = imread('blb_0_1.jpg'); BW = im2bw(image); BW = imresize(BW,[m,n]); BW = ~BW; %for 4,1,9,8 SE = strel('square',10); BW = imdilate(BW,SE); %% figure;imshow(BW); st = regionprops(BW,'BoundingBox'); shape.Inserter = vision.ShapeInserter('LineWidth',4,'BorderColor','Custom','CustomBorderColor',uint8([255 0 0])); str_ele=strel('disk',1,0); for k = 1:length(st) % k=1; % for k = 1:1 thisBB = st(k).BoundingBox; %figure1 = step(shape.Inserter,figure1,bbox_loc{k}); thisBBarea=thisBB(3)*thisBB(4); if thisBB(3)>20 && thisBB(4)>20 rectangle = int32([thisBB(1),thisBB(2),thisBB(3),thisBB(4)]); end if(thisBBarea >870) bbox_loc{k}=rectangle; crop_I_new=imcrop(figure1,rectangle); crop_I_new_gray=rgb2gray(crop_I_new); crop_I=im2bw(crop_I_new_gray,0.7); % figure;imshow(crop_I); signature{k}=signature_find(crop_I); if isempty(signature{k}) signature{k}=[99999,99999,99999]; end figure1 = step(shape.Inserter,figure1,bbox_loc{k}); end end signature=signature(~cellfun('isempty',signature)); save('signature.mat','signature'); signature=load('signature.mat'); sign_objects=load('sign_object2'); for i=1:length(signature.signature) for j=1:length(sign_objects.sign_object2) diff{i,j}=abs(signature.signature{1,i}-sign_objects.sign_object2{j,1}.count); end end for(i=1:size(diff,1)) for(j=1:size(diff,2)) if(sign_objects.sign_object2{j,1}.count(3)>1000) temp1(i,j)=diff{i,j}(1)+diff{i,j}(2); else temp1(i,j)=diff{i,j}(1)+diff{i,j}(2)+diff{i,j}(3); end end end for(i=1:size(temp1,1)) [temp1_min(i),index1(i)]=min(temp1(i,:)); disp(sign_objects.sign_object2{index1(i),2}); furniture{i,1}=sign_objects.sign_object2{index1(i),2} figure;imshow(figure1); bbox_loc=bbox_loc(~cellfun('isempty',bbox_loc)); end for k = 1:length(bbox_loc) H= text( double(bbox_loc{k}(1)),double(bbox_loc{k}(2)),sign_objects.sign_object2{index1(k),2}); set(gcf,'DefaultTextColor','blue') end % for i=1:size(diff,1) % for j=1:size(diff,2) % % temp1(i,j)=(diff{i,j}(1)); % temp2(i,j)=(diff{i,j}(2)); % temp3(i,j)=(diff{i,j}(3)); % % % end % [temp1_min(i),index1(i)]=min(temp1(i,:)); % disp(sign_objects.sign_object1{index1(i),2}); % furniture{i,1}=sign_objects.sign_object1{index1(i),2} % end I am attaching a zip file which contains files which will be used by this code while running. This is the floorplan image with objects.   This is the image with only walls.