Draw circle on image, center to center

Hello Every One.

I want to draw circle on image, center to center, the radius equal to quarter of the image side length. How can I do please

[Matt J]

What does "center to center" mean?

[bashar halleem]

Center of circle at the center of Image

Answer 1

[Matt J]

Maybe this is what you're looking for,

>> A=rgb2gray(imread('wagon.jpg')); imshow(A);
>> [m,n]=size(A);
>> drawcircle('Center',[n,m]/2+0.5,'Radius',length(A)/4)

[bashar halleem]

It is not work

[Matt J]

As you can see, it did for me.

[bashar halleem]

for the same image it is done, but for my image it give me a Error, I think it is by my image location. What shall I change in this code please @MJ

[Matt J]

Here's another example, this time in color:

>> A=(imread('strawberries.jpg')); imshow(A);
>> [m,n,~]=size(A);
>> drawcircle('Center',[n,m]/2+0.5,'Radius',length(A)/4)

[bashar halleem]

Yes its work, thank you friend.

[Matt J]

OP's comment moved here:

Thanks @Matt J

[Matt J]

You are quite welcome.