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2012-12-13 20:54:06 -0500 | commented answer | Is there something wrong with circle grid with patternSize of 4 * 3 ? Thank you very much for your kind help! With the method you suggested I succeed to detect the 4x3 grid. By debugging for a lot of times, I find the ‘minDensity’, a member variable defined in class ‘CirclesGridFinderParameters’, has a default initial value of 10, which is a little big for my case of 4x3 grid. I reset this value to 5, and the default method of ‘findCirclesGrid()’ detected the 4x3 grid of circle successfully. Therefore, the main reason for the problem is that I have not set a reasonable value for some parameter defined in class ‘CirclesGridFinderParameters’, and it has nothing to do with the ‘findCirclesGrid()’. Thanks again! |

2012-12-12 20:39:16 -0500 | commented answer | findCirclesGrid Yes, the images are shown here: http://answers.opencv.org/question/5130/is-there-something-wrong-with-circle-grid-with/ Thank you for your attention! |

2012-12-12 20:34:52 -0500 | asked a question | Is there something wrong with circle grid with patternSize of 4 * 3 ? Hi, the findCirclesGrid() can detect the circle center points with symmetrical patternSize of 16 * 8, which is shown as follow: However, I fail to use this function to deal with the symmetrical patternSize of 4 * 3, which is shown as follow: Could someone tell me how to detect the circle points in patternSize of 4 * 3 ? Thanks! |

2012-12-12 08:51:24 -0500 | commented answer | findCirclesGrid Hi, I use symmetrical circle grid with patternSize of 4 * 3, which are 4 points per row and 3 points per column. However the return value of the findHoles() defined in class CirclesGridFinder is always false. Therefore, the findCirclesGrid() can not find the circle center points with patternSize of 4*3. If I want to detect the circle in symmetrical circle grid with patternSize of 4 * 3, is there any way to solve this problem. Thanks. |

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