create an image like this

hello all. i want to create this pattern using Matlab for image processing goal .

please help me , it's a part of my project.

Answer 1

[Joseph Cheng]

You can try something like this. If you think about what you're trying to do is create stripes based on degrees. And how do we get degrees in an image. by performing the arctan of pixel location based off a reference point.

halfI = zeros(1024,512);
x = 1:size(halfI,2);
y = 1:size(halfI,1);
[x y]=meshgrid(x,y);
Ang = flipud(atand(y./x));
figure,imagesc(Ang),colormap(gray),axis equal , axis tight

So here we have the angle for each pixel position from the horizontal and bottom left corner.

So how do we get stripes? well we define how wide each stripe is in angles and then alternate each one

dtheta = 2; %degrees per stripe
stripes = 0:dtheta:90;
for ind = 1:2:length(stripes)-1;
    halfI(stripes (ind)<Ang & stripes (ind+1)>Ang)=1;    
end
figure,imagesc(halfI),colormap(gray),axis equal , axis tight

So now we have half the image.

Img = ~[fliplr(halfI) halfI];
figure,imagesc(Img),colormap(gray), axis , axis tight

Center stripe is doubly thick in my example but i'll let you figure out that part.

[majid]

OH MY GOD , YOUR SOLUTION TO THIS PROBLEM IS AWESOME !! THANK YOU FOR YOUR PROMPT RESPONSE. but , would you please help me to solve middle stripe size ?

[Ayush singhal]

@Joseph Cheng

Is it possible to project these stripes on a 3d cube?