Hi, I'm trying to calibrate a camera with **Asymmetric Circles Grid**. It works fine but only for very small images like 640x480. I need to calibrate with much bigger images but **findCirclesGrid** function cannot detect large circles. I found the problem is probably in **SimpleBlobDetector** settings. When I'm increased **maxArea** parameter to 50000. It's able to detect some of my source images but only those with ideally rounded circles. Images with perspective deformed circles aren't detected. How I must set other Blob detector parameters? Or the problem is elsewhere?
Example:
[Detected small image](https://s13.postimg.org/fjixxr5uf/detected.jpg),
[Not detected large image](https://s13.postimg.org/l8z6i2c0l/not_detected.jpg)
Edit: It seems that CALIB_CB_CLUSTERING flag solved my problem.
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