Description
Extracts a band or set of bands from the
source raster. The
Extract
Format property specifies the bands and the order of the bands
that will be extracted.
Public
Properties
Example
Extract the alpha
component from an image
| [C#] |
 Copy Code
|
IAgStkGraphicsSceneManager manager = ((IAgScenario)root.CurrentScenario).SceneManager;
IAgStkGraphicsScreenOverlayCollectionBase overlayManager = (IAgStkGraphicsScreenOverlayCollectionBase)manager.ScreenOverlays.Overlays;
//
// The URI can be a file path, http, https, or ftp location
//
IAgStkGraphicsRaster image = manager.Initializers.Raster.InitializeWithStringUri(
imageFile);
//
// Extract the alpha channel from the image
//
IAgStkGraphicsBandExtractFilter channelExtract = manager.Initializers.BandExtractFilter.InitializeWithBand(AgEStkGraphicsRasterBand.eStkGraphicsRasterBandAlpha);
image.ApplyInPlace((IAgStkGraphicsRasterFilter)channelExtract);
IAgStkGraphicsRendererTexture2D texture = manager.Textures.FromRaster(image);
//
// Display the image using a screen overlay
//
IAgStkGraphicsTextureScreenOverlay overlay = manager.Initializers.TextureScreenOverlay.Initialize();
((IAgStkGraphicsOverlay)overlay).Width = 0.2;
((IAgStkGraphicsOverlay)overlay).WidthUnit = AgEStkGraphicsScreenOverlayUnit.eStkGraphicsScreenOverlayUnitFraction;
((IAgStkGraphicsOverlay)overlay).Height = 0.2;
((IAgStkGraphicsOverlay)overlay).HeightUnit = AgEStkGraphicsScreenOverlayUnit.eStkGraphicsScreenOverlayUnitFraction;
((IAgStkGraphicsOverlay)overlay).Origin = AgEStkGraphicsScreenOverlayOrigin.eStkGraphicsScreenOverlayOriginTopRight;
overlay.Texture = texture;
overlayManager.Add((IAgStkGraphicsScreenOverlay)overlay);
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Extract the alpha
component from an image
| [Visual Basic .NET] |
Copy Code
|
Dim
manager As IAgStkGraphicsSceneManager
= DirectCast(root.CurrentScenario, IAgScenario).SceneManager
Dim overlayManager As IAgStkGraphicsScreenOverlayCollectionBase =
DirectCast(manager.ScreenOverlays.Overlays,
IAgStkGraphicsScreenOverlayCollectionBase)
Dim image As IAgStkGraphicsRaster =
manager.Initializers.Raster.InitializeWithStringUri( _
imageFile)
Dim channelExtract As IAgStkGraphicsBandExtractFilter =
manager.Initializers.BandExtractFilter.InitializeWithBand(AgEStkGraphicsRasterBand.eStkGraphicsRasterBandAlpha)
image.ApplyInPlace(DirectCast(channelExtract,
IAgStkGraphicsRasterFilter))
Dim texture As IAgStkGraphicsRendererTexture2D =
manager.Textures.FromRaster(image)
Dim overlay As IAgStkGraphicsTextureScreenOverlay =
manager.Initializers.TextureScreenOverlay.Initialize()
DirectCast(overlay, IAgStkGraphicsOverlay).Width = 0.2
DirectCast(overlay, IAgStkGraphicsOverlay).WidthUnit =
AgEStkGraphicsScreenOverlayUnit.eStkGraphicsScreenOverlayUnitFraction
DirectCast(overlay, IAgStkGraphicsOverlay).Height = 0.2
DirectCast(overlay, IAgStkGraphicsOverlay).HeightUnit =
AgEStkGraphicsScreenOverlayUnit.eStkGraphicsScreenOverlayUnitFraction
overlay.Texture = texture
DirectCast(overlay, IAgStkGraphicsOverlay).Origin =
AgEStkGraphicsScreenOverlayOrigin.eStkGraphicsScreenOverlayOriginTopRight
overlayManager.Add(DirectCast(overlay,
IAgStkGraphicsScreenOverlay))
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See Also
ExtractFormat