calibration board tracking

edit

not all dots are detected in each image, like the example, there are 3 or 4 rows of dots at the top of the board that are not being detected.

You can achieve what you want using another board with less circles or squares (Chessboard) .

To get transformation matrix you need "world coordinates" and their correspondence in image.

Did you try findCirclesGrid function ?

The large dots in the center are used to calculate the homography. What is good way to find only the large dots in the image and determine their correspondence to their known xyz values?

I think the easiest way is contour detection, then eliminate small circles using area or length threshold. you'll be able to find contours mass center. ( after detecting all large dots make sure they are sorted to matche their known values ).

thank you.