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How do you add a border to an image?

How do you add a border to an image?

How do you add a border to an image?

I am trying to analyse an image in Matlab and need to be able to see the left edge of the image. At the moment I add a 1 pixel border to the image (or just to the left side) in a photo program like Gimp. This is time consuming so I'm looking for a way to get Matlab to add the border for me.

At the moment I use

dispIm = imread(file,'tif');

Which then opens the image ready for analysis. What code can I add to add the black border?

RE: How do you add a border to an image?

Solved the problem :)

RE: How do you add a border to an image?

good you solved it. Matlab has a computer vision toolbox that may be handy. Will be interesting to see how many CV researchers switch from C to Matlab because of it. Open CV is still a good resource though.  


RE: How do you add a border to an image?

You could use ImageMagick to add borders to your outputs. For Linux:


clear;clc;close all;
A = [0.866-0.5*i, 0.866+0.5*i, 0.000+1,0*i]'
h = figure(1);
W = 4; H = 3;
FN = findall(h,'-property','FontName');
FS = findall(h,'-property','FontSize');
system('convert bordertest.png -bordercolor green -border 10x10 bordertest.png')
In Windows, convert has some issues... but here is a discussion of how to get ImageMagick convert working in Windows:

Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio

RE: How do you add a border to an image?

I forgot in the previous post: The result of the above code is attached. Also, the important line from the above example is:


system('convert bordertest.png -bordercolor green -border 10x10 bordertest.png')
Clearly, you could change the border color to whatever you'd like.

Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio

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