NONE              155 modules/core/include/opencv2/core/mat.hpp         NONE              = 0 << KIND_SHIFT,
NONE              289 modules/core/include/opencv2/core/opengl.hpp         NONE            = 0,
NONE              460 modules/core/include/opencv2/core/persistence.hpp         NONE      = 0, //!< empty node
NONE              215 modules/viz/include/opencv2/viz/types.hpp             enum { NONE = 0, ALT = 1, CTRL = 2, SHIFT = 4 };