Visual Basic (Declaration) | |
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Public Class SpatialFilterCommand Inherits Leadtools.ImageProcessing.RasterCommand Implements IRasterCommand |
Visual Basic (Usage) | Copy Code |
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Dim instance As SpatialFilterCommand |
C# | |
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public class SpatialFilterCommand : Leadtools.ImageProcessing.RasterCommand, IRasterCommand |
C++/CLI | |
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public ref class SpatialFilterCommand : public Leadtools.ImageProcessing.RasterCommand, IRasterCommand |
Run the Leadtools.ImageProcessing.Effects.SpatialFilterCommand on an image and applies a Prewitt edge detection filter.
Visual Basic | Copy Code |
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Public Sub SpatialFilterCommandExample() Dim codecs As New RasterCodecs() codecs.ThrowExceptionsOnInvalidImages = True Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")) ' Prepare the command Dim command As SpatialFilterCommand = New SpatialFilterCommand(SpatialFilterCommandPredefined.PrewittHorizontal) 'Apply a Prewitt edge detection filter. command.Run(leadImage) codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24) End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class |
C# | Copy Code |
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public void SpatialFilterCommandExample() { // Load an image RasterCodecs codecs = new RasterCodecs(); codecs.ThrowExceptionsOnInvalidImages = true; RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")); // Prepare the command SpatialFilterCommand command = new SpatialFilterCommand(SpatialFilterCommandPredefined.PrewittHorizontal); //Apply a Prewitt edge detection filter. command.Run(image); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
SilverlightCSharp | Copy Code |
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public void SpatialFilterCommandExample(RasterImage image, Stream outStream) { // Prepare the command SpatialFilterCommand command = new SpatialFilterCommand(SpatialFilterCommandPredefined.PrewittHorizontal); //Apply a Prewitt edge detection filter. // Save result image RasterCodecs codecs = new RasterCodecs(); codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24); image.Dispose(); } |
SilverlightVB | Copy Code |
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Public Sub SpatialFilterCommandExample(ByVal image As RasterImage, ByVal outStream As Stream) ' Prepare the command Dim command As SpatialFilterCommand = New SpatialFilterCommand(SpatialFilterCommandPredefined.PrewittHorizontal) 'Apply a Prewitt edge detection filter. ' Save result image Dim codecs As RasterCodecs = New RasterCodecs() codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24) image.Dispose() End Sub |
- A spatial filter recomputes the brightness of each pixel in an image by using a weighted averaging technique that considers the surrounding pixels. Spatial filters are used for operations such as sharpening an image or detecting edges within the image.
- The SpatialFilterCommand works best with 24-bit, 16-bit, or grayscale images. If the image uses a color palette, this command matches the new brightness value of each pixel to the nearest color in the existing palette.
- This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
- It is beyond the scope of this documentation to explain how applying various weighting factors affects an image. If you specify your own filter, you should refer to a textbook on image processing. For example, Digital Image Processing: Principles and Applications, by Gregory A. Baxes.
- This command does not support 32-bit grayscale images.
For more information, refer to List of Spatial Filters.
System.Object
Leadtools.ImageProcessing.RasterCommand
Leadtools.ImageProcessing.Effects.SpatialFilterCommand
Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)
Reference
SpatialFilterCommand MembersLeadtools.ImageProcessing.Effects Namespace
Detecting and Enhancing Edges and Lines
List of Spatial Filters
SharpenCommand Class
Leadtools.ImageProcessing.Color.PosterizeCommand
MosaicCommand Class
EmbossCommand Class
AverageCommand Class
Leadtools.ImageProcessing.Core.MedianCommand
AddNoiseCommand Class
Leadtools.ImageProcessing.Color.IntensityDetectCommand
BinaryFilterCommand Class
Leadtools.ImageProcessing.Core.MinimumCommand
Leadtools.ImageProcessing.Core.MaximumCommand
OilifyCommand Class
Leadtools.ImageProcessing.Color.SolarizeCommand
Leadtools.ImageProcessing.Core.WindowLevelCommand
SkeletonCommand Class
RegionHolesRemovalCommand Class
Leadtools.ImageProcessing.SpecialEffects.DiffuseGlowCommand
HighPassCommand Class
MaskConvolutionCommand Class