Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_recognition
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_recognition
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_recognition
fix mutex of ColorHistogram and HoughCircles
Merge pull request #216 from garaemon/fix-scoped-lock

Fix scoped lock in ColorHistogram and HoughCircles