/// <summary>
///
/// </summary>
/// <param name="srcData"></param>
/// <param name="arges"></param>
/// <returns></returns>
public override double[] Process(double[] input_data, FilterArgs args)
{
double[] sData = base.Process(input_data, args);
if (sData == null)
{
return(null);
}
if (!(args is MedianFilterArgs))
{
return(null);
}
MedianFilterArgs e = args as MedianFilterArgs;
return(this.Process(sData, e));
}
/// <summary>
/// 平台处理函数
/// </summary>
/// <param name="srcData"></param>
/// <param name="arges"></param>
/// <returns></returns>
public List <FlatInfo> Process(double[] input_data, FilterArgs args)
{
if (input_data == null)
{
return(null);
}
if (args == null)
{
return(null);
}
if (!(args is MedianFilterArgs))
{
return(null);
}
MedianFilterArgs arg = args as MedianFilterArgs;
int _flat_width = arg.FrameSize / 2 + 1;
if (input_data.Length <= _flat_width)
{
return(null);
}
//查找平台
List <FlatInfo> _flat_list = new List <FlatInfo>();
List <FlatInfo> _flat1 = FindFlat(input_data.ToList(), _flat_width);
if (_flat1 != null)
{
_flat_list.AddRange(_flat1);
}
List <FlatInfo> _flat2 = FindFlat(input_data.ToList(), _flat_width + 1);
if (_flat2 != null)
{
_flat_list.AddRange(_flat2);
}
//List<FlatInfo> _flat3 = FindFlat(input_data.ToList(), _flat_width - 1);
//if (_flat3 != null)
// _flat_list.AddRange(_flat3);
return(_flat_list);
}
/// <summary>
/// midpoint filter
/// </summary>
/// <param name="srcData"></param>
/// <param name="FrameSize"></param>
/// <returns></returns>
protected virtual double[] Process(double[] input_data, MedianFilterArgs args)
{
if (input_data == null)
{
return(null);
}
if (args == null)
{
return(null);
}
if (input_data.Length <= args.FrameSize)
{
return(input_data);
}
int _half_window_size = args.FrameSize / 2;
int _flat_width = _half_window_size + 1;
//一次滤波过程中总有半窗口长度的数据未被滤波
//组织用于恢复平台的原始数据
List <double> _input_data_list = input_data.ToList();
_input_data_list.InsertRange(0, this._his_input_nofilting);
_his_input_nofilting = _input_data_list.GetRange(_input_data_list.Count - _half_window_size, _half_window_size);//更新数据偏移
_input_data_list.RemoveRange(_input_data_list.Count - _half_window_size, _half_window_size);
_input_data_list.InsertRange(0, this._his_input_list);
//中值滤波
double[] _mid_data_buf = _midFilter.Process(input_data, args);
if (_mid_data_buf == null)
{
return(null);
}
if (_mid_data_buf.Length <= _flat_width)
{
return(_mid_data_buf);
}
//组织滤波后的数据，数量应该与input_data_list数据一致
List <double> _mid_data_list = _mid_data_buf.ToList();
_mid_data_list.InsertRange(0, this._his_mid_list);
if (_mid_data_list.Count != _input_data_list.Count)
{
return(null);
}
//寻找并处理平台
List <FlatInfo> _flat_list = _flatPro.Process(_mid_data_list.ToArray(), args);
if (_flat_list != null && _flat_list.Count != 0)
{
//用原始数据恢复平台
foreach (FlatInfo fi in _flat_list)
{
_mid_data_list.RemoveRange(fi.StartIndex, fi.FlatWidth);
_mid_data_list.InsertRange(fi.StartIndex, _input_data_list.GetRange(fi.StartIndex, fi.FlatWidth));
}
}
//处理历史数据
_his_mid_list.Clear();
_his_input_list.Clear();
if ((_flat_list == null) || (_flat_list.Count == 0))
{
_his_mid_list.AddRange(_mid_data_list.GetRange(_mid_data_list.Count - (_half_window_size + 2), _half_window_size + 2));
_his_input_list.AddRange(_input_data_list.GetRange(_input_data_list.Count - (_half_window_size + 2), _half_window_size + 2));
_mid_data_list.RemoveRange(_mid_data_list.Count - (_half_window_size + 2), _half_window_size + 2);
}
else
{
FlatInfo _flat_info = _flat_list[_flat_list.Count - 1];
int _end_index = _flat_info.StopIndex + 1;
_his_mid_list.AddRange(_mid_data_list.GetRange(_end_index, _mid_data_list.Count - _end_index));
_his_input_list.AddRange(_input_data_list.GetRange(_end_index, _input_data_list.Count - _end_index));
_mid_data_list.RemoveRange(_end_index, _mid_data_list.Count - _end_index);
}
//for (int i = _mid_data_list.Count - 1; i >= _mid_data_list.Count - _flat_width; i--)
//{
// if (_mid_data_list[i - 1] == _mid_data_list[i])
// {
// this._his_mid_list.Clear();
// this._his_input_list.Clear();
// }
// else
// {
// this._his_mid_list.Clear();
// int count = _mid_data_list.Count - i + 1;
// this._his_mid_list.AddRange(_mid_data_list.GetRange(i - 1, count));
// _mid_data_list.RemoveRange(i - 1, count);
// this._his_input_list.Clear();
// this._his_input_list.AddRange(_input_data_list.GetRange(i - 1, count));
// break;
// }
//}
return(_mid_data_list.ToArray());
}
