2 Commits

Author	SHA1	Message	Date
catree	5a79b90ade	Update chessboard pattern image to remove squares overlap. Update also asymmetric pattern image.	2018-03-15 13:22:56 +01:00
Vadim Pisarevsky	4ac4ce3e40	replaced 8x6 pattern with 9x6, which orientation can be determined without any ambiguity	2010-12-13 15:00:35 +00:00