detect a circle in an image along with radius and color code example

Example 1: detect a circle in an image along with radius and color

[centers,radii] = imfindcircles(rgb,[20 25],'ObjectPolarity','dark', ...
          'Sensitivity',0.95);

delete(h)
viscircles(centers,radii);

Example 2: detect a circle in an image along with radius and color

imshow(rgb)
h = viscircles(centers,radii);

Example 3: detect a circle in an image along with radius and color

[centers,radii] = imfindcircles(rgb,[20 25],'ObjectPolarity','dark', ...
    'Sensitivity',0.9)

Example 4: detect a circle in an image along with radius and color

[centers,radii] = imfindcircles(rgb,[20 25],'ObjectPolarity','dark')

Example 5: detect a circle in an image along with radius and color

imshow(rgb)

hBright = viscircles(centersBright, radiiBright,'Color','b');

Example 6: detect a circle in an image along with radius and color

h = viscircles(centers,radii);

Example 7: detect a circle in an image along with radius and color

rgb = imread('coloredChips.png');
imshow(rgb)

Example 8: detect a circle in an image along with radius and color

[centersBright,radiiBright] = imfindcircles(rgb,[20 25], ...
    'ObjectPolarity','bright','Sensitivity',0.92);

Example 9: detect a circle in an image along with radius and color

[centersBright,radiiBright,metricBright] = imfindcircles(rgb,[20 25], ...
    'ObjectPolarity','bright','Sensitivity',0.92,'EdgeThreshold',0.1);

delete(hBright)
hBright = viscircles(centersBright, radiiBright,'Color','b');

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Misc Example