如何去除柵格影像的黑邊？

來自：http://zhihu.esrichina.com.cn/?/question/6725

朱新穎

【解決辦法】：
可以通過設置背景值以及背景色解決此問題。
對於三波段進行RDB渲染的影像可以使用下面代碼：

IRasterRenderer RR = RL.Renderer; 
IRasterRGBRenderer rasterRGBRenderer = null; 
if (RR is IRasterRGBRenderer) 
rasterRGBRenderer = RR as IRasterRGBRenderer; 
RR.Update(); 
rasterRGBRenderer.RedBandIndex = 0; 
rasterRGBRenderer.GreenBandIndex = 1; 
rasterRGBRenderer.BlueBandIndex = 2; 
IRgbColor rgb = new RgbColorClass(); 
rgb.NullColor = true; 
IRasterStretch2 RS = rasterRGBRenderer as IRasterStretch2; // IRasterStretch無法設置數組，需用2 
double background = 
{ 
0, 0, 0 
}; 
RS.Background = true; 
RS.BackgroundValue = background as object; 
RS.BackgroundColor = rgb as IColor; 
axMapControl1.Refresh();

對於單波段影像： 
單波段：

IRasterRenderer RR = RL.Renderer;
IRasterStretchColorRampRenderer RSC = null;
if (RR is IRasterStretchColorRampRenderer)
RSC = RR as IRasterStretchColorRampRenderer;
RR.Update();
RSC.BandIndex = 0;
IRgbColor rgb = new RgbColorClass(); 
rgb.NullColor = true; 
IRasterStretch RS = RSC as IRasterStretch;
RS.Background = true;
RS.set_BackgroundValues(0);
RS.BackgroundColor = rgb as IColor;
axMapControl1.Refresh();