Calculates a global motion orientation in a selected region

orient = cv.calcGlobalOrientation(orientation, mask, mhi, timestamp, duration)

Input

• orientation Motion gradient orientation image calculated by the function cv.calcMotionGradient
• mask Mask image. It may be a conjunction of a valid gradient mask, also calculated by cv.calcMotionGradient, and the mask of a region whose direction needs to be calculated.
• mhi Motion history image calculated by cv.updateMotionHistory.
• timestamp Timestamp passed to cv.updateMotionHistory.
• duration Maximum duration of a motion track in milliseconds, passed to cv.updateMotionHistory.

Output

• orient Output global orientation.

The function calculates an average motion direction in the selected region and returns the angle between 0 degrees and 360 degrees. The average direction is computed from the weighted orientation histogram, where a recent motion has a larger weight and the motion occurred in the past has a smaller weight, as recorded in mhi.