/// <summary>
/// 辐射定标。
/// </summary>
/// <param name="InputDS">输入的栅格数据集。</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <param name="Gain">增益倍数。</param>
/// <param name="Offset">偏移量。</param>
/// <param name="OutPath">输出栅格数据集的位置。</param>
/// <returns>返回操作成功或失败。</returns>
public static bool ApplyGainAndOffset(OSGeo.GDAL.Dataset InputDS, OSGeo.GDAL.DataType OutDataType, List <double> Gain, List <double> Offset, string OutPath)
{
try
{
if (InputDS == null)
{
throw new ArgumentNullException("输入数据集为空。");
}
if (String.IsNullOrWhiteSpace(OutPath.Trim()))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
if ((Gain.Count != InputDS.RasterCount) || (Offset.Count != InputDS.RasterCount))
{
throw new IndexOutOfRangeException("增益数据或偏移数据与输入数据集波段数不符。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
FrmProgress FP = new FrmProgress()
{
Text = "正在进行辐射定标...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
int xSize = InputDS.RasterXSize;
int ySize = InputDS.RasterYSize;
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, xSize, ySize, InputDS.RasterCount, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
Tools.Common.CopyMetadata(InputDS, DS);
for (int i = 0; i < InputDS.RasterCount; i++) //遍历每个波段
{
FP.SetProgress2("正在处理波段：", i + 1, InputDS.RasterCount, "");
for (int Row = 0; Row < ySize; Row++) //遍历每一行(y)
{
FP.SetProgress1("正在处理：", Row + 1, ySize, "行");
double[] Values = new double[xSize];
//读取DN到数组
InputDS.GetRasterBand(i + 1).ReadRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
for (int Col = 0; Col < xSize; Col++) //对每一个值进行计算
{
Values[Col] = GainOffset(Values[Col], Gain[i], Offset[i]);
}
//写结果到新栅格
DS.GetRasterBand(i + 1).WriteRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
}
FP.Finish();
Dri.Dispose();
DS.Dispose();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
/// <summary>
/// 重分类。
/// </summary>
/// <param name="InputDS">输入的数据集。</param>
/// <param name="ReplaceList">用于对照值替换的表。</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <param name="OutPath">输出数据集的路径。</param>
/// <param name="DefaultValue">若值不在ReplaceList中，则该像元的值设为。</param>
/// <returns>操作成功或失败。</returns>
public static bool Reclassify(OSGeo.GDAL.Dataset InputDS, List <double[]> ReplaceList, OSGeo.GDAL.DataType OutDataType, string OutPath, double DefaultValue = 0.03)
{
try
{
if (InputDS == null)
{
throw new ArgumentNullException("输入数据集为空。");
}
if (String.IsNullOrWhiteSpace(OutPath.Trim()))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
if (InputDS.RasterCount != 1)
{
throw new ArgumentOutOfRangeException("重分类的影像不是灰度影像。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
int xSize = InputDS.RasterXSize;
int ySize = InputDS.RasterYSize;
FrmProgress FP = new FrmProgress()
{
Text = "正在进行重分类...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
double NoDataValue = -9999;
int HasNoDataValue = -1;
InputDS.GetRasterBand(1).GetNoDataValue(out NoDataValue, out HasNoDataValue);
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, xSize, ySize, 1, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
if (HasNoDataValue == 1)
{
DS.GetRasterBand(1).SetNoDataValue(NoDataValue);
}
Tools.Common.CopyMetadata(InputDS, DS);
for (int Row = 0; Row < ySize; Row++)
{
FP.SetProgress1("正在处理：", Row + 1, ySize, "行");
double[] Values = new double[xSize];
InputDS.GetRasterBand(1).ReadRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
for (int Col = 0; Col < xSize; Col++)
{
//值为NoData
if (Math.Abs(Values[Col] - NoDataValue) < 1e-7)
{
continue;
}
int i = -1;
//对照表进行值替换
for (i = 0; i < ReplaceList.Count; i++)
{
if (Values[Col] == ReplaceList[i][0])
{
Values[Col] = ReplaceList[i][1];
break;
}
}
if (i == ReplaceList.Count)
{
Values[Col] = 0.03;
}
}
DS.GetRasterBand(1).WriteRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
DS.Dispose();
FP.Finish();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
/// <summary>
/// NoData值替换。将非NoData值替换为指定值。
/// </summary>
/// <param name="InputDS">输入的数据集。</param>
/// <param name="NoDataValue">NoData值。</param>
/// <param name="ReplaceValue">非NoData值替换为的值。</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <param name="OutPath">输出数据集的路径。</param>
/// <returns>操作成功或失败。</returns>
public static bool ReplaceNoData(OSGeo.GDAL.Dataset InputDS, double NoDataValue, double ReplaceValue, OSGeo.GDAL.DataType OutDataType, string OutPath, double NewNoDataValue = -9999)
{
try
{
if (InputDS == null)
{
throw new ArgumentNullException("输入数据集为空。");
}
if (String.IsNullOrWhiteSpace(OutPath.Trim()))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
if (InputDS.RasterCount != 1)
{
throw new ArgumentOutOfRangeException("替换值的影像不是灰度影像。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
int xSize = InputDS.RasterXSize;
int ySize = InputDS.RasterYSize;
FrmProgress FP = new FrmProgress()
{
Text = "正在进行非NoData值替换...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, xSize, ySize, 1, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
Tools.Common.CopyMetadata(InputDS, DS);
DS.GetRasterBand(1).SetNoDataValue(NoDataValue);
for (int Row = 0; Row < ySize; Row++)
{
FP.SetProgress1("正在处理：", Row + 1, ySize, "行");
double[] Values = new double[xSize];
InputDS.GetRasterBand(1).ReadRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
for (int Col = 0; Col < xSize; Col++)
{
if (Math.Abs(Values[Col] - NoDataValue) > 1e-7)
{
//将ReplaceValue与NoDataValue的值设置为一样的可以仅更改NoData值
if (Math.Abs(ReplaceValue - NoDataValue) > 1e-7)
{
Values[Col] = ReplaceValue;
}
}
else
{
Values[Col] = NewNoDataValue;
}
}
DS.GetRasterBand(1).WriteRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
DS.Dispose();
FP.Finish();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
public static bool CutImage(OSGeo.GDAL.Dataset InputDS, int CutWidth, int CutHeight, OSGeo.GDAL.DataType OutDataType, string OutFolder)
{
try
{
if (InputDS == null)
{
throw new ArgumentNullException("输入的数据集不可为空。");
}
if (String.IsNullOrWhiteSpace(OutFolder))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
//取输入的宽、高、波段最小值创建输出数据集。
int Width = InputDS.RasterXSize;
int Height = InputDS.RasterYSize;
int Rows = Height / CutHeight;
int Cols = Width / CutWidth;
FrmProgress FP = new FrmProgress()
{
Text = "正在进行影像裁剪...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
FP.Output("输出的目录为：" + OutFolder);
FP.Output("输出的数据类型为：" + OutDataType.ToString());
for (int row = 0; row < Rows; row++)
{
FP.SetProgress2("总进度：", row + 1, Rows, "");
string ParentPath = row.ToString();
Directory.CreateDirectory(Path.Combine(OutFolder, ParentPath));
for (int col = 0; col < Cols; col++)
{
FP.SetProgress1("当前行进度：", col + 1, Cols, "");
string OutName = row.ToString() + "_" + col.ToString() + ".tif";
OSGeo.GDAL.Dataset DS = Dri.Create(Path.Combine(OutFolder, ParentPath, OutName), CutWidth, CutHeight, InputDS.RasterCount, OutDataType, null);
for (int band = 1; band <= InputDS.RasterCount; band++)
{
double[] buf = new double[CutWidth * CutHeight];
InputDS.GetRasterBand(band).ReadRaster(col * CutWidth, row * CutHeight, CutWidth, CutHeight, buf, CutWidth, CutHeight, 0, 0);
DS.GetRasterBand(band).WriteRaster(0, 0, CutWidth, CutHeight, buf, CutWidth, CutHeight, 0, 0);
}
////单行读取写入，防止爆内存。
//for (int cRow = 0; cRow < CutHeight; cRow++)
//{
// double[] buf = new double[CutWidth];
// InputDS.GetRasterBand(band).ReadRaster(col * CutWidth, row * CutHeight + cRow, CutWidth, 1, buf, CutWidth, 1, 0, 0);
// DS.GetRasterBand(band).WriteRaster(0, cRow, CutWidth, 1, buf, CutWidth, 1, 0, 0);
// DS.FlushCache();
// Thread.Sleep(1);
//}
DS.FlushCache();
DS.Dispose();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
}
FP.Finish();
InputDS.Dispose();
Dri.Dispose();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
/// <summary>
/// 数据集相除。
/// </summary>
/// <param name="D1">被除数据集。</param>
/// <param name="D2">除数据集。</param>
/// <param name="OutDataType">输出数据集的数据类型。</param>
/// <param name="OutPath">输出路径。</param>
/// <returns>操作成功或失败。</returns>
public static bool Divide(OSGeo.GDAL.Dataset D1, OSGeo.GDAL.Dataset D2, OSGeo.GDAL.DataType OutDataType, string OutPath)
{
try
{
if (D1 == null || D2 == null)
{
throw new ArgumentNullException("输入的数据集不可为空。");
}
if (String.IsNullOrWhiteSpace(OutPath.Trim()))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
//取输入的宽、高、波段最小值创建输出数据集。
int Width = Math.Min(D1.RasterXSize, D2.RasterXSize);
int Height = Math.Min(D1.RasterYSize, D2.RasterYSize);
int band = Math.Min(D1.RasterCount, D2.RasterCount);
FrmProgress FP = new FrmProgress()
{
Text = "正在进行数据集除法运算...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, Width, Height, band, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
Tools.Common.CopyMetadata(D1, DS);
for (int bandcount = 1; bandcount <= band; bandcount++)
{
FP.SetProgress2("正在处理", bandcount, band, "波段");
for (int row = 0; row < Height; row++)
{
FP.SetProgress1("正在处理：", row + 1, Height, "行");
double[] d1Tmp = new double[Width];
double[] d2Tmp = new double[Width];
double[] dsTmp = new double[Width];
D1.GetRasterBand(bandcount).ReadRaster(0, row, Width, 1, d1Tmp, Width, 1, 0, 0);
D2.GetRasterBand(bandcount).ReadRaster(0, row, Width, 1, d2Tmp, Width, 1, 0, 0);
for (long i = 0; i < Width; i++)
{
if (d2Tmp[i] == 0)
{
dsTmp[i] = 0;
}
else
{
dsTmp[i] = d1Tmp[i] / d2Tmp[i];
}
}
DS.GetRasterBand(bandcount).WriteRaster(0, row, Width, 1, dsTmp, Width, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
}
FP.Finish();
Dri.Dispose();
DS.Dispose();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
/// <summary>
/// 影像直方图匹配。
/// </summary>
/// <param name="InputDS">输入的数据集。</param>
/// <param name="MatchDS">要匹配到的数据集。</param>
/// <param name="InputCumu">输入的数据集的累积概率表。</param>
/// <param name="MatchingCumu">要匹配到的数据集的累积概率表。</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <param name="OutPath">输出栅格数据集的位置。</param>
/// <returns>操作成功或失败。</returns>
public static bool HistogramMatching(OSGeo.GDAL.Dataset InputDS, OSGeo.GDAL.Dataset MatchDS, double[][] InputCumu, double[][] MatchingCumu, OSGeo.GDAL.DataType OutDataType, string OutPath)
{
try
{
if (InputDS.RasterCount != MatchDS.RasterCount)
{
throw new ArgumentException("数据集波段数不一致。");
}
FrmProgress FP = new FrmProgress()
{
Text = "正在进行影像直方图匹配...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
int[][] LUT = new int[InputDS.RasterCount][];
FP.Output("正在计算查找表...");
for (int i = 0; i < InputDS.RasterCount; i++)
{
LUT[i] = HistogramMatching(InputCumu[i], MatchingCumu[i]);
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
int xSize = InputDS.RasterXSize;
int ySize = InputDS.RasterYSize;
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, xSize, ySize, InputDS.RasterCount, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
Tools.Common.CopyMetadata(InputDS, DS);
for (int bandcount = 0; bandcount < InputDS.RasterCount; bandcount++)
{
FP.SetProgress2("正在处理", bandcount + 1, InputDS.RasterCount, "波段");
Tools.Common.GetMinimum(InputDS.GetRasterBand(bandcount + 1), out double inputDSBandMin);
Tools.Common.GetMinimum(MatchDS.GetRasterBand(bandcount + 1), out double matchDSBandMin);
for (int Row = 0; Row < ySize; Row++)
{
FP.SetProgress1("正在处理", Row + 1, ySize, "行");
double[] Values = new double[xSize];
//读取DN到数组
InputDS.GetRasterBand(bandcount + 1).ReadRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
for (int Col = 0; Col < xSize; Col++)
{
//防止GDAL自带方法算出的统计数据越界。
if ((Values[Col] - inputDSBandMin) <= 0)
{
Values[Col] = matchDSBandMin + LUT[bandcount][0];
continue;
}
if ((Values[Col] - inputDSBandMin) >= LUT[bandcount].Length - 1)
{
Values[Col] = matchDSBandMin + LUT[bandcount][LUT[bandcount].Length - 1];
continue;
}
Values[Col] = matchDSBandMin + LUT[bandcount][(int)(Values[Col] - inputDSBandMin)];
}
//写结果到新栅格
DS.GetRasterBand(bandcount + 1).WriteRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
}
FP.Finish();
Dri.Dispose();
DS.Dispose();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
/// <summary>
/// 平滑锐化算法。
/// </summary>
/// <param name="InputDS">输入的栅格数据集。</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <param name="Method">平滑锐化方法。</param>
/// <param name="OutPath">输出栅格数据集的位置。</param>
/// <returns>返回操作成功或失败。</returns>
public static bool SmoothSharpening(OSGeo.GDAL.Dataset InputDS, OSGeo.GDAL.DataType OutDataType, SmoothShapeninngMethods Method, string OutPath)
{
try
{
if (InputDS == null)
{
throw new ArgumentNullException("输入数据集为空。");
}
if (String.IsNullOrWhiteSpace(OutPath.Trim()))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
int xSize = InputDS.RasterXSize;
int ySize = InputDS.RasterYSize;
FrmProgress FP = new FrmProgress()
{
Text = "正在进行平滑锐化操作...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
FP.Output("选择的平滑/锐化方法为：\"" + (typeof(SmoothShapeninngMethods).GetField((Method).ToString()).GetCustomAttributes(false)[0] as DescriptionAttribute).Description + "\"");
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, xSize, ySize, InputDS.RasterCount, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
Tools.Common.CopyMetadata(InputDS, DS);
for (int band = 0; band < InputDS.RasterCount; band++) //遍历每个波段
{
FP.SetProgress1("正在处理", band + 1, InputDS.RasterCount, "波段");
for (int Row = 0; Row < ySize - 2; Row++) //从第1行遍历至倒数第三行
{
FP.SetProgress2("正在处理", Row, ySize - 2, "行");
double[] Values = new double[3 * xSize]; //读取的数值
double[] Result = new double[xSize]; //结果数值
InputDS.GetRasterBand(band + 1).ReadRaster(0, Row, xSize, 3, Values, xSize, 3, 0, 0); //读取3行
Array.Copy(Values, xSize, Result, 0, xSize); //
for (int Col = 0; Col < xSize - 2; Col++) //对每一个值进行计算
{
double[,] Input = new double[3, 3];
for (int i = 0; i < 3; i++)
{
Input[i, 0] = Values[Col + i * xSize];
Input[i, 1] = Values[Col + i * xSize + 1];
Input[i, 2] = Values[Col + i * xSize + 2];
}
Result[Col + 1] = SmoothSharpening(Input, Method); //计算输入数据中心像元的值
}
//写结果到新栅格
DS.GetRasterBand(band + 1).WriteRaster(0, Row + 1, xSize, 1, Result, xSize, 1, 0, 0);
}
if ((Method.ToString()).Contains("Smooth"))
{
double[] row = new double[xSize];
InputDS.GetRasterBand(band + 1).ReadRaster(0, 0, xSize, 1, row, xSize, 1, 0, 0); //读取第一行
DS.GetRasterBand(band + 1).WriteRaster(0, 0, xSize, 1, row, xSize, 1, 0, 0);
InputDS.GetRasterBand(band + 1).ReadRaster(0, ySize - 1, xSize, 1, row, xSize, 1, 0, 0); //读取最后一行
DS.GetRasterBand(band + 1).WriteRaster(0, ySize - 1, xSize, 1, row, xSize, 1, 0, 0);
}
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
FP.Finish();
Dri.Dispose();
DS.Dispose();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(false);
}
}
/// <summary>
/// 二值化。
/// </summary>
/// <param name="InputDS">输入的数据集。</param>
/// <param name="Threshold">分割阈值。</param>
/// <param name="ZeroValue">小于阈值的像元值被设为...</param>
/// <param name="OneValue">大于阈值的像元值被设为...</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <param name="OutPath">输出栅格数据集的位置。</param>
/// <returns>操作成功或失败。</returns>
public static bool Binarize(OSGeo.GDAL.Dataset InputDS, double Threshold, double ZeroValue, double OneValue, OSGeo.GDAL.DataType OutDataType, string OutPath)
{
try
{
if (InputDS == null)
{
throw new ArgumentNullException("输入数据集为空。");
}
if (InputDS.RasterCount != 1)
{
throw new ArgumentException("输入的数据集波段大于1。");
}
if (String.IsNullOrWhiteSpace(OutPath.Trim()))
{
throw new ArgumentNullException("输出路径为空或非法。");
}
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
int xSize = InputDS.RasterXSize;
int ySize = InputDS.RasterYSize;
FrmProgress FP = new FrmProgress()
{
Text = "正在进行二值化操作...",
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
OSGeo.GDAL.Dataset DS = Dri.Create(OutPath, xSize, ySize, 1, OutDataType, null);
FP.Output("已创建输出数据集\"" + OutPath + "\"，数据类型为" + OutDataType.ToString() + "。");
Tools.Common.CopyMetadata(InputDS, DS);
for (int Row = 0; Row < ySize; Row++)
{
FP.SetProgress1("正在处理：", Row + 1, ySize, "行");
double[] Values = new double[xSize];
InputDS.GetRasterBand(1).ReadRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
for (int Col = 0; Col < xSize; Col++)
{
//阈值应用
if (Values[Col] < Threshold)
{
Values[Col] = ZeroValue;
}
else
{
Values[Col] = OneValue;
}
}
DS.GetRasterBand(1).WriteRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
FP.Finish();
Dri.Dispose();
DS.Dispose();
return(true);
}
catch (Exception err)
{
MessageBox.Show(err.Message);
return(false);
}
}