| private cvUpdateMotionHistory ( IntPtr silhouette, IntPtr mhi, double timestamp, double duration ) : void | ||
| silhouette | IntPtr | |
| mhi | IntPtr | |
| timestamp | double | |
| duration | double | |
| Результат | void | |
/// <summary>
/// Update the motion history with the specific image and the specific timestamp
/// </summary>
/// <param name="foregroundMask">The foreground of the image to be added to history</param>
/// <param name="timestamp">The time when the image is captured</param>
public void Update(Image <Gray, Byte> foregroundMask, DateTime timestamp)
{
_lastTime = timestamp;
TimeSpan ts = _lastTime.Subtract(_initTime);
_foregroundMask = foregroundMask;
if (_mhi == null)
{
_mhi = new Image <Gray, float>(foregroundMask.Size);
}
if (_mask == null)
{
_mask = foregroundMask.CopyBlank();
}
if (_orientation == null)
{
_orientation = new Image <Gray, float>(foregroundMask.Size);
}
CvInvoke.cvUpdateMotionHistory(foregroundMask.Ptr, _mhi, ts.TotalSeconds, _mhiDuration);
double scale = 255.0 / _mhiDuration;
CvInvoke.cvConvertScale(_mhi.Ptr, _mask.Ptr, scale, (_mhiDuration - ts.TotalSeconds) * scale);
CvInvoke.cvCalcMotionGradient(_mhi.Ptr, _mask.Ptr, _orientation.Ptr, _maxTimeDelta, _minTimeDelta, 3);
}
