CODEWITHSUNDEEP
matlab
AsiJapan
AsiJapan

Reputation: 313

Top, bottom, left, right x,y coordinates of a polyshape object- Matlab

I converted an image to a polyshape and therefore how can I find the top, bottom, left, right x,y coordinates of a polyshape object that was created ?

Code:

clc;
clear;
close all; 

fileName= 'https://i.sstatic.net/AIJO3.jpg';
I = rgb2gray(imread(fileName));
I = imcomplement(I); 
 
imshow(I);
hold on;
 
%%%%%%Boundary
BW = imbinarize(I);
[B,L] = bwboundaries(BW,'noholes');
 
k=1;
stat = regionprops(I,'Centroid');
b = B{k};                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
yBoundary = b(:,2);
xBoundary = b(:,1);
plot(yBoundary, xBoundary, 'g', 'linewidth', 2);
 
%%%%%Polyshape object
pgon1 = polyshape(yBoundary, xBoundary); %flipped polyshape
plot(pgon1);

enter image description here

Upvotes: 1

Views: 179

Answers (1)

matthlud
matthlud

Reputation: 75

To get the enclosing top (y_max), bottom (y_min), left (x_min), and right (x_max) coordinates (i.e. the bounding box), you can use:

[xlim,ylim] = boundingbox(pgon1);

In the two row-vectors, the lower and upper extremes of the x- and y-coordinates are saved respectively. Please refer to: https://mathworks.com/help/matlab/ref/polyshape.boundingbox.html

Upvotes: 2

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