Visual Basic (Declaration) | |
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Public Class GrayscaleCommand Inherits RasterCommand Implements IRasterCommand |
Visual Basic (Usage) | Copy Code |
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Dim instance As GrayscaleCommand |
C# | |
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public class GrayscaleCommand : RasterCommand, IRasterCommand |
C++/CLI | |
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public ref class GrayscaleCommand : public RasterCommand, IRasterCommand |
This example will load a 24-bit image then convert it to a grayscale image with 8, 12 and 16 bits/pixel
Visual Basic | Copy Code |
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Public Sub GrayscaleCommandExample() Dim codecs As RasterCodecs = New RasterCodecs() Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") Dim destFileName8 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale8.jpg") Dim destFileName12 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale12.jpg") Dim destFileName16 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale16.jpg") ' Load the source image from disk as 24-bits/pixel Dim image As RasterImage = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1) ' Check the grayscale mode Console.WriteLine("Grsyscale mode of original image = {0}", image.GrayscaleMode) ' Convert to 8-bit grayscale Dim command As GrayscaleCommand = New GrayscaleCommand() command.BitsPerPixel = 8 command.Run(image) ' Check the grayscale mode Console.WriteLine("Grsyscale mode after grayscale command with 8 bpp = {0}", image.GrayscaleMode) ' Save it to disk codecs.Options.Jpeg.Save.QualityFactor = 2 codecs.Save(image, destFileName8, RasterImageFormat.Jpeg, 8) image.Dispose() ' Load the image again this time grayscale to 12-bits/pixel image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1) command.BitsPerPixel = 12 command.Run(image) Console.WriteLine("Grsyscale mode after grayscale command with 12 bpp = {0}", image.GrayscaleMode) codecs.Options.Jpeg.Save.QualityFactor = 2 codecs.Save(image, destFileName12, RasterImageFormat.Jpeg, 12) image.Dispose() ' Load the image again this time grayscale to 16-bits/pixel image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1) command.BitsPerPixel = 16 command.Run(image) Console.WriteLine("Grsyscale mode after grayscale command with 16 bpp = {0}", image.GrayscaleMode) ' When saving 16-bit jpegs, you must use lossless quality factor codecs.Options.Jpeg.Save.QualityFactor = 0 codecs.Save(image, destFileName16, RasterImageFormat.Jpeg, 16) image.Dispose() ' Clean Up image.Dispose() 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 GrayscaleCommandExample() { RasterCodecs codecs = new RasterCodecs(); string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); string destFileName8 = Path.Combine(LEAD_VARS.ImagesDir,"Image1_grayscale8.jpg"); string destFileName12 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale12.jpg"); string destFileName16 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale16.jpg"); // Load the source image from disk as 24-bits/pixel RasterImage image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); // Check the grayscale mode Console.WriteLine("Grsyscale mode of original image = {0}", image.GrayscaleMode); // Convert to 8-bit grayscale GrayscaleCommand command = new GrayscaleCommand(); command.BitsPerPixel = 8; command.Run(image); // Check the grayscale mode Console.WriteLine("Grsyscale mode after grayscale command with 8 bpp = {0}", image.GrayscaleMode); // Save it to disk codecs.Options.Jpeg.Save.QualityFactor = 2; codecs.Save(image, destFileName8, RasterImageFormat.Jpeg, 8); image.Dispose(); // Load the image again this time grayscale to 12-bits/pixel image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); command.BitsPerPixel = 12; command.Run(image); Console.WriteLine("Grsyscale mode after grayscale command with 12 bpp = {0}", image.GrayscaleMode); codecs.Options.Jpeg.Save.QualityFactor = 2; codecs.Save(image, destFileName12, RasterImageFormat.Jpeg, 12); image.Dispose(); // Load the image again this time grayscale to 16-bits/pixel image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); command.BitsPerPixel = 16; command.Run(image); Console.WriteLine("Grsyscale mode after grayscale command with 16 bpp = {0}", image.GrayscaleMode); // When saving 16-bit jpegs, you must use lossless quality factor codecs.Options.Jpeg.Save.QualityFactor = 0; codecs.Save(image, destFileName16, RasterImageFormat.Jpeg, 16); image.Dispose(); // Clean Up image.Dispose(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
SilverlightCSharp | Copy Code |
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public void GrayscaleCommandExample(RasterImage image, Stream destStream8, Stream destStream12, Stream destStream16) { RasterCodecs codecs = new RasterCodecs(); RasterImage temp = image.Clone(); // Check the grayscale mode Debug.WriteLine("Grsyscale mode of original image = {0}", image.GrayscaleMode); // Convert to 8-bit grayscale GrayscaleCommand command = new GrayscaleCommand(); command.BitsPerPixel = 8; command.Run(image); // Check the grayscale mode Debug.WriteLine("Grsyscale mode after grayscale command with 8 bpp = {0}", image.GrayscaleMode); Debug.Assert(image.GrayscaleMode == RasterGrayscaleMode.OrderedInverse || image.GrayscaleMode == RasterGrayscaleMode.OrderedNormal); // Save it to disk codecs.Options.Jpeg.Save.QualityFactor = 2; codecs.Save(image, destStream8, RasterImageFormat.Jpeg, 8); image.Dispose(); // this time grayscale to 12-bits/pixel image = temp.Clone(); command.BitsPerPixel = 12; command.Run(image); Debug.WriteLine("Grsyscale mode after grayscale command with 12 bpp = {0}", image.GrayscaleMode); codecs.Options.Jpeg.Save.QualityFactor = 2; codecs.Save(image, destStream12, RasterImageFormat.Jpeg, 12); image.Dispose(); // this time grayscale to 16-bits/pixel image = temp.Clone(); command.BitsPerPixel = 16; command.Run(image); Debug.WriteLine("Grsyscale mode after grayscale command with 16 bpp = {0}", image.GrayscaleMode); // When saving 16-bit jpegs, you must use lossless quality factor codecs.Options.Jpeg.Save.QualityFactor = 0; codecs.Save(image, destStream16, RasterImageFormat.Jpeg, 16); image.Dispose(); // Clean Up temp.Dispose(); } |
SilverlightVB | Copy Code |
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Public Sub GrayscaleCommandExample(ByVal image As RasterImage, ByVal destStream8 As Stream, ByVal destStream12 As Stream, ByVal destStream16 As Stream) Dim codecs As RasterCodecs = New RasterCodecs() Dim temp As RasterImage = image.Clone() ' Check the grayscale mode Debug.WriteLine("Grsyscale mode of original image = {0}", image.GrayscaleMode) ' Convert to 8-bit grayscale Dim command As GrayscaleCommand = New GrayscaleCommand() command.BitsPerPixel = 8 command.Run(image) ' Check the grayscale mode Debug.WriteLine("Grsyscale mode after grayscale command with 8 bpp = {0}", image.GrayscaleMode) Debug.Assert(image.GrayscaleMode = RasterGrayscaleMode.OrderedInverse OrElse image.GrayscaleMode = RasterGrayscaleMode.OrderedNormal) ' Save it to disk codecs.Options.Jpeg.Save.QualityFactor = 2 codecs.Save(image, destStream8, RasterImageFormat.Jpeg, 8) image.Dispose() ' this time grayscale to 12-bits/pixel image = temp.Clone() command.BitsPerPixel = 12 command.Run(image) Debug.WriteLine("Grsyscale mode after grayscale command with 12 bpp = {0}", image.GrayscaleMode) codecs.Options.Jpeg.Save.QualityFactor = 2 codecs.Save(image, destStream12, RasterImageFormat.Jpeg, 12) image.Dispose() ' this time grayscale to 16-bits/pixel image = temp.Clone() command.BitsPerPixel = 16 command.Run(image) Debug.WriteLine("Grsyscale mode after grayscale command with 16 bpp = {0}", image.GrayscaleMode) ' When saving 16-bit jpegs, you must use lossless quality factor codecs.Options.Jpeg.Save.QualityFactor = 0 codecs.Save(image, destStream16, RasterImageFormat.Jpeg, 16) image.Dispose() ' Clean Up temp.Dispose() End Sub |
Support for 12 and 16-bit grayscale images is available only in the Document/Medical Imaging editions.
The resulting image can be an 8-bit, 12-bit, or 16-bit grayscale image. Once the function is complete, the RasterImage.GrayscaleMode property will indicate the type of grayscale image.
When converting to 12-bit or 16-bit grayscale, the RasterImage.GetLookupTable is not used. When converting to 8-bit grayscale, the RasterImage.GetLookupTable is used to get the RGB for each input pixel. The grayscale value corresponding to that RGB triple is used in the destination image.
This method does not support signed images.
For more information, refer to Introduction to Image Processing With LEADTOOLS.
For more information, refer to Grayscale Images.
System.Object
Leadtools.ImageProcessing.RasterCommand
Leadtools.ImageProcessing.GrayscaleCommand
Target Platforms: Silverlight, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only), Windows Phone 7