Description

Adjusts the band levels of the source raster linearly.

Public Methods

ClearAdjustments	Clears the level adjustment values for all bands.
SetLevelAdjustment	Sets the linear level adjustment value for the given Raster Band. Both negative and positive values are accepted.

Example

Adjust the color levels of 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); 

 

// 

// Adjust the color levels of the image 

// 

IAgStkGraphicsLevelsFilter levelsFilter = manager.Initializers.LevelsFilter.Initialize(); 

levelsFilter.SetLevelAdjustment(AgEStkGraphicsRasterBand.eStkGraphicsRasterBandBlue, -255); 

levelsFilter.SetLevelAdjustment(AgEStkGraphicsRasterBand.eStkGraphicsRasterBandGreen, -255); 

image.ApplyInPlace((IAgStkGraphicsRasterFilter)levelsFilter); 

 

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.eStkGraphicsScreenOverlayOriginBottomRight; 

overlay.Texture = texture; 

 

overlayManager.Add((IAgStkGraphicsScreenOverlay)overlay);

Adjust the color levels of 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)

'

' The URI can be a file path, http, https, or
ftp location

'

Dim image As IAgStkGraphicsRaster =
manager.Initializers.Raster.InitializeWithStringUri( _

    imageFile)



'

' Adjust the color levels of the
image

'

Dim levelsFilter As IAgStkGraphicsLevelsFilter =
manager.Initializers.LevelsFilter.Initialize()

levelsFilter.SetLevelAdjustment(AgEStkGraphicsRasterBand.eStkGraphicsRasterBandBlue,
-255)

levelsFilter.SetLevelAdjustment(AgEStkGraphicsRasterBand.eStkGraphicsRasterBandGreen,
-255)

image.ApplyInPlace(DirectCast(levelsFilter,
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.eStkGraphicsScreenOverlayOriginBottomRight



overlayManager.Add(DirectCast(overlay,
IAgStkGraphicsScreenOverlay))

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IAgStkGraphicsLevelsFilter Interface

Description

Public Methods

Example

See Also