private void button14_Click(object sender, EventArgs e)
{
//构造参数提供者
string fname = @"f:\\FY3A_Mersi_2010_06_24_10_00_1000M_L1B_PRJ_Whole.LDF";
IRasterDataProvider prd = GeoDataDriver.Open(fname) as IRasterDataProvider;
ArgumentProvider argprd = new ArgumentProvider(prd, null);
//构造判识表达式
//string express = "(band4 + band3) == 0? 0f : (band4 - band3) / (float)(band4 + band3)";
string express = "NDVI(band4,band3)";
int[] bandNos = new int[] { 4, 3 };
//构造栅格计算判识器
IRasterExtracter <UInt16, float> extracter = new SimpleRasterExtracter <UInt16, float>();
extracter.Reset(argprd, bandNos, express);
//判识
resultNDVI = new MemPixelFeatureMapper <float>("NDVI", 1000, new Size(prd.Width, prd.Height), prd.CoordEnvelope, prd.SpatialRef);
Stopwatch sw = new Stopwatch();
sw.Start();
extracter.Extract(resultNDVI);
//sw.Stop();
//Text = sw.ElapsedMilliseconds.ToString();
//判识结果生成二值位图
//IBinaryBitmapBuilder builder = new BinaryBitmapBuilder();
//Size bmSize = new Size(prd.Width / 2, prd.Height / 2);
//Bitmap bitmap = builder.CreateBinaryBitmap(bmSize, Color.Red, Color.Transparent);
//builder.Fill(idxs, new Size(prd.Width, prd.Height), ref bitmap);
//bitmap.Save("f:\\1.png", ImageFormat.Png);
//判识结果永久保存
RasterIdentify id = new RasterIdentify();
id.ThemeIdentify = "CMA";
id.ProductIdentify = "FIR";
id.SubProductIdentify = "NDVI";
id.Satellite = "FY3A";
id.Sensor = "MERSI";
id.Resolution = "250M";
id.OrbitDateTime = DateTime.Now.Subtract(new TimeSpan(1, 0, 0, 0, 0));
id.GenerateDateTime = DateTime.Now;
IInterestedRaster <float> iir = new InterestedRaster <float>(id, new Size(prd.Width, prd.Height), prd.CoordEnvelope.Clone());
iir.Put(resultNDVI);
iir.Dispose();
sw.Stop();
Text = sw.ElapsedMilliseconds.ToString();
int count = iir.Count(aoi, (v) => { return(v == 1); });
iir.Count(aoi, (v) => { return((int)v); });
}