how to save image of the result imfindcircle

i have used imfindcircle to find circle object in image. do you know how to save the image result of the circle object detected?

[Image Analyst]

What kind of result do you want? The function imwrite() saves images - why can't you use that? Please explain why that won't work but only after you read this.

Answer 1

[harjeet singh]

dear raja, most probable you are using viscircles to highlighter the circles, this commands uses superimposing of graph over the image not actually changes the pixel values.

use this program to save circles with markings

clear all
close all
clc

A = imread('coins.png');
figure(1)
imshow(A)
drawnow

[centers, radii, metric] = imfindcircles(A,[15 30]);
centersStrong5 = centers(1:5,:);
radiiStrong5 = radii(1:5);
metricStrong5 = metric(1:5);

%/////// this command makes plot superimpose on the image not the pixels change permanently 

viscircles(centersStrong5, radiiStrong5,'EdgeColor','b');
imwrite(A,'image_out_1.jpg');

%/////// for changing the values of the pixels in the image for making circle //////
B(:,:,1)=A;
B(:,:,2)=A;
B(:,:,3)=A;

for i=1:length(radiiStrong5)
    theta=0:1:360;
    r=round(centersStrong5(i,1) + radiiStrong5(i)*sin(theta));
    c=round(centersStrong5(i,2) + radiiStrong5(i)*cos(theta));

      for j=1:length(r)
          B(c(j),r(j),:)=[0 0 255];
      end
  end
  figure(2)
  imshow(B)
  drawnow

imwrite(B,'image_out_2.jpg');

[raja gopal]

thank you for the code but i want to save the image result of the original image with circle marking. do you know how?

[harjeet singh]

in the last of the code imwrite(B,'image_out_2.jpg'); command do what you are asking for,

[Image Analyst]

harjeet and I both suggest imwrite(), but we don't know what you want to save because you haven't told us. Remember my comment at the very top where I asked "What kind of result to you want?" Well . . . we still don't have an answer to that question. Why not???

[raja gopal]

hello how to make marking circle become thicker? please help :(

Answer 2

[Alejandro Navarro]

Hello.

instead of saving the output of a viscircles + image to a file, I would like to assign it as a variable. I have tried "imfuse(Image,Circles)" but this does not work because the circles are not an image, but a "matlab.graphics.primitive.Group". How would I do that related task?

Thanks

Answer 3

[Michal Heker]

How about making a circles mask with imdilate and a disk element structure?

Something like this:

BW = zeros(size(I,1),size(I,2));

for i = 1:length(points)

landmarksMask(points(i,2),(points(i,1)) = 1;

end

BW = imdilate(BW, strel('disk',3));

And duplicate your image with BW.