Bucket extraction for HoG is wrong

[edubois]

FYI, I think there is a mistake in your code:

CVPR2015/HoGCamera/jni/edge_detect_generator.cpp

Line 33 in b0cc827

grad_bucket(x, y) = cast<int>(round((atan2(y, x) * B / (float)M_PI))) % B;

This can be negative,
Shouldn't you add 2 * PI to the value atan result when it's negative and do a modulo pi?