houghcirclescv

Syntax

houghcirclescv(handle, ratio, dist...)

houghcirclescv(handle, ratio, dist, param1, param2, min, max)

Inputs

handle

Handle of an image from the ComputerVision library.

Type: integer

ratio

Inverse ratio of the accumulator resolution to the image resolution.

Type: scalar

dist

Minimum distance between the centers of the detected circles.

Type: scalar

param1

Optional first method-specific parameter, defaults to 100.

Type: scalar

param2

Optional second method-specific parameter, defaults to 100.

Type: scalar

min

Optional minimum circle radius, defaults to 0.

Type: integer

max

Optional maximum circle radius, defaults to 0.

Type: integer

Example

Detect and show circles in an image using Hough transform:

src = imreadcv('bird3.jpg');
srcsize = imsizecv(src);
houghcirclescv(src, 1, srcsize(1)/16, 150,  20, 10, 30);

Detect and show circles:

%Read image
img = imreadcv('houghcirclescv_fig3.png',1);
figure(1);
imshowcv(img);
  
%Apply Hough transform on the image
houghcirclescv(img,3,2,200,300,10);

figure(2);
imshowcv(img);