[Bf-vfx] Non-square shapes for pattern and search areas

[Sergey I. Sharybin]

Hi everyone!

It was got discussion today in #lbmv at irc.freenode.net related on 
forcing pattern/search area be square.

Main question: is non-square shape of marker useful in motion tracking 
workflow?

Some quick cases i could think could be solved just adding offset to 
search area or by resizing this areas.  But we've checked some tracking 
applications and they allow to use non-square markers. Soi'm not sure 
it'll be good idea to stick to squares.

P.S. From UI point of view, search are could be rectangular, just 
"missing" areas could be filled with black when it's passing to libmv 
which would probably be optimized for squares.

-- 
With best regards, Sergey I. Sharybin

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