HolyMoly's profile - activity

Ah! Is there any reason why you can't do that only in the java version? Will mucking about the source code help? Thanks!

Hi y'all, I am using OpenCV 3.2.0 on Android to detect an asymmetrical circle grid. I want to modify the default parameters of SimpleBlobDetector and pass it on findCircleGrid() to improve the detection rate. I can get as far as modifying the params but I am unable to pass this object to findCirclesGrid. In fact, findCirclesGrid does not take in a fourth parameter in the Android version. I am able to do it successfully in C++ like this:

SimpleBlobDetector::Params params;

params.filterByConvexity = false;

Ptr<FeatureDetector> blobDetector = SimpleBlobDetector::create(params);

findCirclesGrid(image, boardsize, centers, CALIB_CB_ASYMMETRIC_GRID, blobDetector);

Is there any way to do this in Android version of OpenCV? Thanks in advance!

Hi nikitos1550, Can you elaborate on how you ended up solving this issue? I am facing a similar problem albeit with an asymmetrical pattern. I am unable to place a finger on when and why findCirclesGrid is failing.

Hi! I am using OpenCV 2.4 on Ubuntu and I am trying to detect an asymmetric circle grid. First I am cropping and warping the image and in the resulting image I am using findCirclesGrid. It is working fine in around 40% of the cases but fails arbitrarily even when the images are visually very similar. e.g.: but .

I have also tried enabling CALIB_CB_CLUSTERING flag and weirdly that seems to make things worse for me. Manipulating parameters for the SImpleBlobDetector doesn't work in a consistent way for all the images. What could be going wrong? Is there a way to debug it systematically and visually observe where findCirclesGrid is failing?

Thanks!