Replace values to create an image with binary values (0,1)
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Commented: Amjad Iqbal on 21 Feb 2022
I have a matrix (2D image) which I need to replace values in such a way to obtain binary image.
I used Max function which replace values for one condition. However, In this case, I need to replace values greater and less than zero with zero (0) and replace all values = zero with 1.
I have uploaded image, vaues are ranging from (-3.8 to 3.8), can you please guide me on how to obtain binary image.
Many thanks in advance.
OK, now that you've added the .mat file, there are no values that are exactly 0. You need to define a range.
s = load('image.mat')
V = s.V;
subplot(2, 2, 1);
subplot(2, 2, 3:4);
title('Histogram of V')
% There are no values that are exactly zero so let's pick a tolerance
tolerance = 0.1;
binaryImage = abs(V) < tolerance;
subplot(2, 2, 2);
More Answers (2)
Sounds like a logical result would work.
a = [-3.8 -1 0 1 3.8];
c = a~=1
The challenge I see is that none of your data values exactly equal 1. You'll need to look at your data and decide what range of values you want to consider to represent land.
" I need to replace values greater and less than zero with zero (0) and replace all values = zero with 1. "
So why don't you just do
outputMatrix = inputMatrix == 0;
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