XDMBandIndexTransform Class

// IO initialize to load image file
XRasterIO RasterIO = new XRasterIO();
String strError = "";
if (RasterIO.Initialize(out strError) == false)
{
    return;
}

// Image load
String strFilePathLoad = "D:\\Sample\\RS_Sample\\IndexTransform\\etm.xdm";
XRSLoadFile xrsFileInput = RasterIO.LoadFile(strFilePathLoad, out strError, false, eIOCreateXLDMode.All_NoMsg);

// Set input param 
XBandParamIndexTransform InputParam = new XBandParamIndexTransform();

// Common
InputParam.IndexTransMethod = eIndexTransMethod.LANDSAT_TM_NDVI;
InputParam.SrcFile = xrsFileInput;

// Create New process band and set input param
XDMBandIndexTransform bandProcess = new XDMBandIndexTransform();
bandProcess.BandName = xrsFileInput.FileName;
bandProcess.SetInputParam(ref InputParam);

// create XRSSaveFile to save realtime band(XDMBandXXXX)
XRSSaveFile fileSave = new XRSSaveFile();
XDMBand bandCast = (XDMBand)bandProcess;
fileSave.AddBand(ref bandCast);

// Save output file
XThread thd = null;
String strFilePathSave = "D:\\Sample\\Out_IndexTransform.xdm";
if (!RasterIO.Export(ref fileSave, strFilePathSave, "XDM", out strError, thd))
{
    return;
}