MATLAB: Get an image from a fgure window

imageImage Processing Toolboxviscircles

I have an image which has a lot of circles. So I have used imfindcirles and viscircles to find and visualize the circles in a figure window. Now I want to get the image as it is and store it in a variable in the program.

I tried using getimage, but it gets only the original image, without the circles marked in it.

Best Answer

Did you try to get cdata?

theFrame = get(gca, 'CData');

If that doesn't work, use export_fig.

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MATLAB: Problem with pixels of filled circle

It's because you're not saving the image. You're saving a screenshot, and who knows how big that is? You can adjust the size to whatever you want. Just because the underlying image has a radius of 200 doesn't mean that the radius on the display is 200 pixels. In fact you can change it just by dragging the corner of the window. What you want to do is to call imwrite() to save the actual image, not saveas() to save the screenshot:

imwrite(uint8(circlePixels),'circulo.bmp');

MATLAB: Get the Centroid of a specific object in an image

I = imread("image.png") ; 
[y,x] = find(I==0) ; 
iwant = [mean(x) mean(y)] ; 
% check 
imshow(I) 
hold on
plot(iwant(1),iwant(2),'+r')

Best Answer

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MATLAB: Problem with pixels of filled circle

MATLAB: Get the Centroid of a specific object in an image

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