Has anyone had any luck using the function detectCircleGridPoints? I can't get it to work and I have the Computer Vision Toolbox installed.

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Andrea Labudzki 2022-1-16

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评论： Andrea Labudzki 2022-1-19

I have a simple calibration pattern that I would like to implement in my code, but I keep getting the following error: Unrecognized function or variable 'detectCircleGridPoints'. I am simply calling this function within my script:

fileName = 'calibration.jpeg';
img = imread(fileName);
I = rgb2gray(img);
patternDims = [9,9]
detectCircleGridPoints(I,patternDims)

What am I doing wrong?

Here is the image by the way:

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Torsten 2022-1-16

编辑：Torsten 2022-1-16

To be sure, try the command for a toolbox for which you know you have a licence.

If it is a private MATLAB license you are working with, you will have to contact Mathworks Support Center, I guess.

If it is a campus licence, contact the computing center.

Andrea Labudzki 2022-1-17

alright, thanks for the advice!

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采纳的回答

yanqi liu 2022-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/1630095-has-anyone-had-any-luck-using-the-function-detectcirclegridpoints-i-can-t-get-it-to-work-and-i-have#answer_875765

在 MATLAB Online 中打开

clc; clear all; close all;

fileName = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/864390/image.jpeg';

img = imread(fileName);

I = rgb2gray(img);

I2 = imresize(I, 800/size(I,1), 'bilinear');

im = I2;

I2 = imcomplement(I2);

bw = ~im2bw(I2, 0.6);

bw = bwareaopen(bw, 10);

bw = imfill(bw, 'holes');

bw2 = ~imopen(bw, strel('disk', 3));

patternDims = [9 9];

imagePoints = detectCircleGridPoints(im2uint8(bw2),patternDims,PatternType="symmetric")

imagePoints = 81×2

373.8634 224.8094 374.8543 270.5855 375.4484 315.5516 375.6929 360.0652 375.7049 404.0779 375.3967 448.0973 374.4328 492.8970 373.1154 538.0381 371.4042 584.3329 419.6315 226.0630

J = insertText(im,imagePoints,1:size(imagePoints,1));

J = insertMarker(J,imagePoints,'x',Color="green",Size=5);

imshow(J)

title("Detected a Circle Grid of Dimensions " + mat2str(patternDims))