public object[] GetStretcher(IRasterDataProvider dataProvider, int[] bandNos, float percent)
{
int[] bNos = bandNos.Distinct().ToArray();
Dictionary <int, RasterQuickStatResult> results;
IProgressMonitor progress = _smartSession.ProgressMonitorManager.DefaultProgressMonitor;
try
{
progress.Reset("正在执行直方图统计...", 100);
progress.Start(false);
IRasterQuickStatTool stat = new RasterQuickStatTool();
results = stat.Compute(dataProvider, null, bNos,
(idx, tip) =>
{
progress.Boost(idx, "正在执行直方图统计...");
});
}
finally
{
progress.Finish();
}
RasterQuickStatResult[] rts = new RasterQuickStatResult[bandNos.Length];
for (int i = 0; i < bandNos.Length; i++)
{
rts[i] = results[bandNos[i]];
}
//
object[] stretchers = GetStretcher(dataProvider.DataType, rts, percent);
return(stretchers);
}
public object PercentXStretcher(int bandNo, float percent)
{
Dictionary <int, RasterQuickStatResult> results;
IRasterQuickStatTool stat = new RasterQuickStatTool();
results = stat.Compute(this, null, new int[] { bandNo }, null);
RasterQuickStatResult rst = results[bandNo];
//
object[] stretchers = GetStretcher(this.DataType, new RasterQuickStatResult[] { rst }, percent);
return(stretchers[0]);
}
private void DisplayStatResult(string fileName, Dictionary <int, RasterQuickStatResult> results)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine(fileName);
foreach (int bandNo in results.Keys)
{
RasterQuickStatResult result = results[bandNo];
sb.AppendLine(" BandNo " + bandNo.ToString());
sb.AppendLine(" MinValue:".PadRight(20) + result.MinValue.ToString("0.####"));
sb.AppendLine(" MaxValue:".PadRight(20) + result.MaxValue.ToString("0.####"));
sb.AppendLine(" MeanValue:".PadRight(20) + result.MeanValue.ToString("0.####"));
sb.AppendLine(" Histogram,Bin=".PadRight(20) + result.HistogramResult.Bin.ToString());
HistogramResult histResult = result.HistogramResult;
int buckets = histResult.ActualBuckets;
sb.AppendLine("DN".PadLeft(15) + "Count(Npts)".PadLeft(15) + "Total Count".PadLeft(15) + "Percent".PadLeft(15) + "Acc Percent".PadLeft(15));
double minValue = result.MinValue;
double bin = histResult.Bin;
long accCount = 0;
double percent = 0;
double accPercent = 0;
for (int i = 0; i < buckets; i++)
{
accCount += histResult.Items[i];
percent = 100 * histResult.Items[i] / (float)histResult.PixelCount;
accPercent += percent;
string sLine = (minValue + i * bin).ToString().PadLeft(15) +
histResult.Items[i].ToString().PadLeft(15) +
accCount.ToString().PadLeft(15) +
percent.ToString("0.####").PadLeft(15) +
accPercent.ToString("0.####").PadLeft(15);
sb.AppendLine(sLine);
}
}
richTextBox1.Text = sb.ToString();
}
