private void SetStretchers()
{
if (_selectedBandNos.Length == 1)
{
if (_stretcherProvider != null)
{
//by chennan 20130403 修改单波段文件密度分割、线性填色错误问题
ColorMapTable <int> oldColorMapTable = _colorMapTable;
//
object obj = _stretcherProvider.GetStretcher(_dataProvider.fileName, _dataProvider.DataType, _colorTableName, out _colorMapTable);
if (obj != null)
{
_stretcher = obj as Func <T, byte>;
}
else
{
//by chennan 20130403 修改单波段文件密度分割、线性填色错误问题
_colorMapTable = oldColorMapTable;
//
st1 = _dataProvider.GetRasterBand(_selectedBandNos[0]).Stretcher as IRgbStretcher <T>;
}
}
else
{
st1 = _dataProvider.GetRasterBand(_selectedBandNos[0]).Stretcher as IRgbStretcher <T>;
}
}
else if (_selectedBandNos.Length == 3)
{
st1 = _dataProvider.GetRasterBand(_selectedBandNos[0]).Stretcher as IRgbStretcher <T>;
st2 = _dataProvider.GetRasterBand(_selectedBandNos[1]).Stretcher as IRgbStretcher <T>;
st3 = _dataProvider.GetRasterBand(_selectedBandNos[2]).Stretcher as IRgbStretcher <T>;
}
}
private void SetStretchers()
{
if (_selectedBandNos.Length == 1)
{
if (_stretcherProvider != null)
{
object obj = _stretcherProvider.GetStretcher(_dataProvider.fileName, _colorTableName, out _colorMapTable);
if (obj != null)
{
_stretcher = obj as Func <T, byte>;
}
else
{
st1 = _dataProvider.GetRasterBand(_selectedBandNos[0]).Stretcher as IRgbStretcher <T>;
}
}
else
{
st1 = _dataProvider.GetRasterBand(_selectedBandNos[0]).Stretcher as IRgbStretcher <T>;
}
}
else if (_selectedBandNos.Length == 3)
{
st1 = _dataProvider.GetRasterBand(_selectedBandNos[0]).Stretcher as IRgbStretcher <T>;
st2 = _dataProvider.GetRasterBand(_selectedBandNos[1]).Stretcher as IRgbStretcher <T>;
st3 = _dataProvider.GetRasterBand(_selectedBandNos[2]).Stretcher as IRgbStretcher <T>;
}
}
public ColorPalette GetColorPalette(IRgbStretcher <T> stretcher, ColorMapTable <T> colorMapTable)
{
ColorPalette palette = (new Bitmap(1, 1, PixelFormat.Format8bppIndexed)).Palette;
byte minByte = 0, maxByte = 0;
Func <T, byte> tobyte = stretcher.Stretcher;
foreach (ColorMapItem <T> it in colorMapTable.Items)
{
minByte = tobyte(it.MinValue);
maxByte = tobyte(it.MaxValue);
for (int i = minByte; i < maxByte; i++)
{
palette.Entries[i] = it.Color;
}
}
return(palette);
}
private bool Write(string inputFileName, string outputFileName, string bandNos, string imageHanceFile, Action <int, string> progressCallback)
{
if (string.IsNullOrEmpty(inputFileName) || !File.Exists(inputFileName))
{
return(false);
}
if (string.IsNullOrEmpty(outputFileName))
{
outputFileName = Path.Combine(Path.GetDirectoryName(inputFileName), Path.GetFileNameWithoutExtension(inputFileName) + ".tif");
}
//解析图像增强方案
if (!string.IsNullOrEmpty(imageHanceFile) && File.Exists(imageHanceFile))
{
_grbProcessors = TryGetRgbProcess(imageHanceFile);
}
using (IRasterDataProvider inRaster = GeoDataDriver.Open(inputFileName) as IRasterDataProvider)
{
RasterIdentify identify = new RasterIdentify(inputFileName);
//设置波段选择及拉伸器
int[] bandNums = TryGetBandSet(bandNos);
if (bandNums == null || (bandNums.Length != 1 && bandNums.Length != 3))
{
Console.WriteLine("输入波段号参数错误！");
return(false);
}
foreach (int band in bandNums)
{
if (band > inRaster.BandCount)
{
return(false);
}
}
IRgbStretcher <UInt16>[] stretchers = new IRgbStretcher <UInt16> [bandNums.Length];
for (int i = 0; i < stretchers.Length; i++)
{
stretchers[i] = new LinearRgbStretcherUInt16(0, 1000, 0, 255);
}
IRasterDataProvider outRaster = null;
try
{
if (progressCallback != null)
{
progressCallback(0, "开始进行文件格式转换...");
}
outRaster = CreatOutputRaster(outputFileName, inRaster, bandNums.Length, progressCallback);
int rowStep = ComputeRowStep(inRaster);
int stepCount = (int)((inRaster.Height) / rowStep + 0.5f);
int curStep = -1;
for (int i = 0; i < inRaster.Height; i += rowStep)
{
if (i + rowStep > inRaster.Height)
{
rowStep = inRaster.Height - i;
}
long bufferSize = inRaster.Width * rowStep;
switch (inRaster.DataType)
{
case enumDataType.UInt16:
{
curStep++;
int curp = (int)((curStep * 1.0f / stepCount) * 100);
if (progressCallback != null)
{
progressCallback(curp, "转换完成" + curp + "%");
}
UInt16[] dataBuffer = new UInt16[bufferSize];
if (bandNums.Length == 3)
{
Byte[] outRDatabuffer = new Byte[bufferSize];
Byte[] outGDatabuffer = new Byte[bufferSize];
Byte[] outBDatabuffer = new Byte[bufferSize];
unsafe
{
//读取RGB三个波段的值并做拉伸处理存入相应buffer数组
fixed(UInt16 *ptr = dataBuffer)
{
fixed(Byte *outRPtr = outRDatabuffer)
{
fixed(Byte *outGPtr = outGDatabuffer)
{
fixed(Byte *outBPtr = outBDatabuffer)
{
IntPtr buffer = new IntPtr(ptr);
inRaster.GetRasterBand(bandNums[0]).Read(0, i, inRaster.Width, rowStep, buffer, inRaster.DataType, inRaster.Width, rowStep);
//R拉伸转换
IntPtr outRBuffer = new IntPtr(outRPtr);
byte * rptr0 = (byte *)outRBuffer;
for (int j = 0; j < dataBuffer.Length; j++)
{
stretchers[0].Stretch(dataBuffer[j], rptr0);
rptr0++;
}
inRaster.GetRasterBand(bandNums[1]).Read(0, i, inRaster.Width, rowStep, buffer, inRaster.DataType, inRaster.Width, rowStep);
//G拉伸转换
IntPtr outGBuffer = new IntPtr(outGPtr);
byte * gptr0 = (byte *)outGBuffer;
for (int j = 0; j < dataBuffer.Length; j++)
{
stretchers[0].Stretch(dataBuffer[j], gptr0);
gptr0++;
}
inRaster.GetRasterBand(bandNums[2]).Read(0, i, inRaster.Width, rowStep, buffer, inRaster.DataType, inRaster.Width, rowStep);
//B拉伸转换
IntPtr outBBuffer = new IntPtr(outBPtr);
byte * bptr0 = (byte *)outBBuffer;
for (int j = 0; j < dataBuffer.Length; j++)
{
stretchers[0].Stretch(dataBuffer[j], bptr0);
bptr0++;
}
//图像增强处理
RgbProcess(outRBuffer, outGBuffer, outBBuffer, outRDatabuffer.Length);
outRaster.GetRasterBand(1).Write(0, i, inRaster.Width, rowStep, outRBuffer, enumDataType.Byte, inRaster.Width, rowStep);
outRaster.GetRasterBand(2).Write(0, i, inRaster.Width, rowStep, outGBuffer, enumDataType.Byte, inRaster.Width, rowStep);
outRaster.GetRasterBand(3).Write(0, i, inRaster.Width, rowStep, outBBuffer, enumDataType.Byte, inRaster.Width, rowStep);
}
}
}
}
}
break;
}
else if (bandNums.Length == 1)
{
Byte[] outDatabuffer = new Byte[bufferSize];
unsafe
{
//读取1个波段的值并做拉伸处理存入相应buffer数组
fixed(UInt16 *ptr = dataBuffer)
{
fixed(Byte *outRPtr = outDatabuffer)
{
IntPtr buffer = new IntPtr(ptr);
inRaster.GetRasterBand(bandNums[0]).Read(0, i, inRaster.Width, rowStep, buffer, inRaster.DataType, inRaster.Width, rowStep);
//R拉伸转换
IntPtr outRBuffer = new IntPtr(outRPtr);
byte * rptr0 = (byte *)outRBuffer;
for (int j = 0; j < dataBuffer.Length; j++)
{
stretchers[0].Stretch(dataBuffer[j], rptr0);
rptr0++;
}
outRaster.GetRasterBand(1).Write(0, i, inRaster.Width, rowStep, outRBuffer, enumDataType.Byte, inRaster.Width, rowStep);
}
}
}
}
break;
}
default: break;
}
}
if (progressCallback != null)
{
progressCallback(100, "文件" + inputFileName + "转换完成");
}
return(true);
}
finally
{
if (outRaster != null)
{
outRaster.Dispose();
}
}
}
}
private Func <T, byte> GetStretcherFromDataProvider(int bandNo)
{
IRgbStretcher <T> st = _dataProvider.GetRasterBand(bandNo).Stretcher as IRgbStretcher <T>;
return(st.Stretcher);
}