Plotting coordinates of object boundaries over x,y-sytem

Question

Thuy Dung Nguyen 2018-8-29

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回答： Vishal Bhutani 2018-9-3

bsp.jpg

I have the segmented image of 8 sprays. I want to extract the boundary of each sprays and plot it over a x,y-system with the main axis of the spray as the positive x-axis. As a result I want to have 8 plots of 8 sprays.

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Answer 1

Vishal Bhutani 2018-9-3

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By my understanding you want to plot 8 sprays in 8 different figures. You can find the attached code for extracting boundaries from sprays and plot in different figures.

clc
clear all
close all
%bsp image
i = imread('bsp.jpg');
figure
imshow(i);
bw = imbinarize(i);
x = bwboundaries(bw);
%To plot all the sprays on single figure
figure
for k = 1:length(x)
   boundary = x{k};
   plot(boundary(:,2), boundary(:,1));
   hold on;
end
%To plot 8 sprays on 8 figures
hold off;
for k = 1:length(x)
   figure
   boundary = x{k};
   plot(boundary(:,2), boundary(:,1));
end