How to convert omnidirectional/ 360 degree image into rectangular form?
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Manisha mane
on 8 Aug 2020
Commented: Image Analyst
on 8 Aug 2020
I wanted to convert 360 image into rectangular form. My image is like this type
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Accepted Answer
Image Analyst
on 8 Aug 2020
What I'd do is to find the inner and outer radii. Lots of ways to do that but you can just take a guess if you want. Then convert those into xInner and yInner and xOuter and yOuter using sin() and cos().
numAngles = 2 * pi * outerRadius;
angles = linspace(0, 2*pi, numAngles);
xOuter = outerRadius * cos(angles);
yOuter = outerRadius * sin(angles);
Then I'd go down the xouter arrays using improfile() to get the intensity along each ray. Then put that into a column of your output matrix. Not hard - give it a try.
for k = 1 : length(xOuter)
x2 = xOuter(k);
y2 = yOuter(k);
x1 = rows/2;
y1 = columns/2;
p = improfile(x1,y1,x2,y2)
outputImage(k, :, :) = p;
end
That won't work as is and that's intentional - I've left the fun parts for you because I assume you want to solve this puzzle yourself to have some pride of ownership. See if you can get it to work. It's really not hard.
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Image Analyst
on 8 Aug 2020
You can also use pol2cart() and meshgrid() like someone will undoubtedly suggest, but there's problems with that method, as you'd find out if you tried it.
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