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2013-09-17 06:46:22 -0500 commented question inferiority of circular marker for stereo-calibration

I doubt anyone will explain this, it's almost a research question. Yes circular markers should be better especially if combined with other methods, which unfortunately are not implemented in opencv. See e.g. paper by Datta, Kim, Kanade.

2013-09-17 06:38:11 -0500 received badge  Supporter (source)
2013-09-16 12:43:07 -0500 asked a question c2039 VS2012 build erros

While compiling the master from github (eff21788a80738db8b0a5901c21e447ff9134d96) on VS2012 (ultimate) under Windows 8 in 32bit mode, I get the following error(s) in Debug mode:

C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xutility(364): error C2039: 'iterator_category' : is not a member of 'cv::MatIterator_<_Tp>'

In Release mode the error does not appear. Is it a bug?

2013-04-15 13:39:53 -0500 received badge  Student (source)
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2013-04-15 13:28:09 -0500 asked a question tests fail depending on compiler: is it OK?

Compiled git version of opencv with intel and clang compilers. Many tests fail if compiled with intel compiler.

Eg. ./opencv_perf_features2d typical failed test lools like

    The difference between expect_min and actual_min is 7.2759576141834259e-12, which exceeds eps, where
expect_min evaluates to 7.5574986112769693e-05,
actual_min evaluates to 7.5574993388727307e-05, and
eps evaluates to 2.2204460492503131e-16.
Argument "points-response" has unexpected minimal value

Is it known or expected behaviour?