ArcEngine做栅格数据拉伸

//获得已打开的栅格数据

IRasterLayer rasterLayer = new RasterLayerClass();

rasterLayer = (IRasterLayer)axMapControl1.Map.Layer[0];

//实现渲染接口。单波段影像用IRasterRenderer接口足够，多波段影像用IRasterRGBRenderer接口。

IRasterRenderer rasterRender = new RasterRGBRendererClass();

rasterRender.Raster =rasterLayer.Raster;

IRasterRGBRenderer rasterRGBRender = rasterRender as IRasterRGBRenderer;

rasterRender.Update();

IRasterStretch2 rasterStretchType = rasterRGBRender as IRasterStretch2;

//esriRasterStretchTypesEnum是枚举类型，包含多个拉伸方式

rasterStretchType.StretchType = esriRasterStretchTypesEnum.esriRasterStretch_Custom;

rasterStretchType.StandardDeviationsParam = 2; //方差

rasterStretchType.StretchStatsType = esriRasterStretchStatsTypeEnum.esriRasterStretchStats_AreaOfView;

rasterLayer.Renderer = rasterRGBRender as IRasterRenderer;

axMapControl1.Refresh();