Leadtools.ImageProcessing Namespace : ColorResolutionCommand Class |
public class ColorResolutionCommand : RasterCommand, IRasterCommand
'Declaration Public Class ColorResolutionCommand Inherits RasterCommand Implements IRasterCommand
'Usage Dim instance As ColorResolutionCommand
public sealed class ColorResolutionCommand : IRasterCommand
function Leadtools.ImageProcessing.ColorResolutionCommand()
public ref class ColorResolutionCommand : public RasterCommand, IRasterCommand
This class provides flexibility in specifying the output destination and in specifying the palette to use.
For general information about dithering, refer to Color Resolution and Dithering and Dithering Methods.
You can convert the image in place or create a new converted image.
In specifying a palette, you can use simple palette options, or you can specify a palette that is tailored to your needs. The tailored palette can be any size that you specify. It can include specific colors, reserved blank entries, and open entries that this method fills with optimized colors.
If you use the same tailored palette more than once, you can improve performance by creating a table, using RasterUserMatchTable.
NOTE: Using this class to change the color order of a 24-bit or 32-bit image (i.e. RGB to BGR) will have no effect on the image when painting or saving (to a file). If you want to change the visual appearance, you can simply swap the color order using the RasterImage.Order property.
When converting to 32 and 64-bit images, you can control whether to initialize the alpha channel values to all 0's or 1's through the InitAlpha property.
This class does not support signed data images. An exception will be thrown if a signed data image is passed to this class.
For more information, refer to Introduction to Image Processing With LEADTOOLS.
For more information, refer to Introduction - Palette Handling.
Public Sub ColorResolutionCommandExample() Dim codecs As RasterCodecs = New RasterCodecs() Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") Dim destFileName1 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres8.bmp") Dim destFileName2 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres4.bmp") ' Load the source image from disk Dim image As RasterImage = codecs.Load(srcFileName) ' First color-res it to 8 bits per pixel using the Netscape palette into a seperate image Dim cmd As ColorResolutionCommand = New ColorResolutionCommand() cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage cmd.BitsPerPixel = 8 cmd.Order = RasterByteOrder.Rgb cmd.DitheringMethod = RasterDitheringMethod.None cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.UsePalette cmd.SetPalette(RasterPalette.Netscape()) cmd.Run(image) Dim destImage As RasterImage = cmd.DestinationImage Debug.Assert(destImage.BitsPerPixel = 8) ' Save it to disk codecs.Save(destImage, destFileName1, RasterImageFormat.Bmp, 8) destImage.Dispose() ' Now color-res the image in-place to 4-bits per pixel using the Optimized palette cmd.Mode = ColorResolutionCommandMode.InPlace cmd.BitsPerPixel = 4 cmd.Order = RasterByteOrder.Rgb cmd.DitheringMethod = RasterDitheringMethod.None cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized cmd.Run(image) Debug.Assert(image.BitsPerPixel = 4) ' Save it to disk codecs.Save(image, destFileName2, RasterImageFormat.Bmp, 4) destImage.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
public void ColorResolutionCommandExample() { RasterCodecs codecs = new RasterCodecs(); string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres8.bmp"); string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres4.bmp"); // Load the source image from disk RasterImage image = codecs.Load(srcFileName); // First color-res it to 8 bits per pixel using the Netscape palette into a seperate image ColorResolutionCommand cmd = new ColorResolutionCommand(); cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage; cmd.BitsPerPixel = 8; cmd.Order = RasterByteOrder.Rgb; cmd.DitheringMethod = RasterDitheringMethod.None; cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.UsePalette; cmd.SetPalette(RasterPalette.Netscape()); cmd.Run(image); RasterImage destImage = cmd.DestinationImage; Debug.Assert(destImage.BitsPerPixel == 8); // Save it to disk codecs.Save(destImage, destFileName1, RasterImageFormat.Bmp, 8); destImage.Dispose(); // Now color-res the image in-place to 4-bits per pixel using the Optimized palette cmd.Mode = ColorResolutionCommandMode.InPlace; cmd.BitsPerPixel = 4; cmd.Order = RasterByteOrder.Rgb; cmd.DitheringMethod = RasterDitheringMethod.None; cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized; cmd.Run(image); Debug.Assert(image.BitsPerPixel == 4); // Save it to disk codecs.Save(image, destFileName2, RasterImageFormat.Bmp, 4); destImage.Dispose(); // Clean Up image.Dispose(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; }
RasterCommandExamples.prototype.ColorResolutionCommandExample = function () { Tools.SetLicense(); with (Leadtools) { with (Leadtools.Codecs) { with (Leadtools.ImageProcessing) { var codecs = new RasterCodecs(); var srcFileName = "Assets\\Image1.cmp"; var destFileName1 = "Image1_colorres8.bmp"; var destFileName2 = "Image1_colorres4.bmp"; var image; var destImage; var cmd; // Load the source image from disk return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) { return codecs.loadAsync(LeadStreamFactory.create(loadFile)) }) .then(function (img) { image = img; // First color-res it to 8 bits per pixel using the Netscape palette into a seperate image cmd = new ColorResolutionCommand(); cmd.mode = ColorResolutionCommandMode.createDestinationImage; cmd.bitsPerPixel = 8; cmd.order = RasterByteOrder.rgb; cmd.ditheringMethod = RasterDitheringMethod.none; cmd.paletteFlags = ColorResolutionCommandPaletteFlags.netscape; cmd.run (image); destImage = cmd.destinationImage; console.assert(destImage.bitsPerPixel === 8, "destImage.bitsPerPixel === 8"); // Save it to disk return Tools.AppLocalFolder().createFileAsync(destFileName1) }) .then(function (saveFile) { return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 8) }) .then(function () { destImage.close(); // Now color-res the image in-place to 4-bits per pixel using the Optimized palette cmd.mode = ColorResolutionCommandMode.inPlace; cmd.bitsPerPixel = 4; cmd.order = RasterByteOrder.rgb; cmd.ditheringMethod = RasterDitheringMethod.none; cmd.paletteFlags = ColorResolutionCommandPaletteFlags.optimized; cmd.run(image); console.assert(image.bitsPerPixel === 4, "image.bitsPerPixel === 4"); // Save it to disk return Tools.AppLocalFolder().createFileAsync(destFileName2) }) .then(function (saveFile) { return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 4) }) .then(function () { destImage.close(); // Clean Up image.close(); codecs.close(); }); } } } }
[TestMethod] public async Task ColorResolutionCommandExample() { RasterCodecs codecs = new RasterCodecs(); string srcFileName = @"Assets\Image1.cmp"; string destFileName1 = @"Image1_colorres8.bmp"; string destFileName2 = @"Image1_colorres4.bmp"; // Load the source image from disk StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName); RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)); // First color-res it to 8 bits per pixel using the Netscape palette into a seperate image ColorResolutionCommand cmd = new ColorResolutionCommand(); cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage; cmd.BitsPerPixel = 8; cmd.Order = RasterByteOrder.Rgb; cmd.DitheringMethod = RasterDitheringMethod.None; cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Netscape; cmd.Run(image); RasterImage destImage = cmd.DestinationImage; Assert.IsTrue(destImage.BitsPerPixel == 8); // Save it to disk StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName1); await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 8); destImage.Dispose(); // Now color-res the image in-place to 4-bits per pixel using the Optimized palette cmd.Mode = ColorResolutionCommandMode.InPlace; cmd.BitsPerPixel = 4; cmd.Order = RasterByteOrder.Rgb; cmd.DitheringMethod = RasterDitheringMethod.None; cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized; cmd.Run(image); Assert.IsTrue(image.BitsPerPixel == 4); // Save it to disk saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName2); await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 4); destImage.Dispose(); // Clean Up image.Dispose(); }
public void ColorResolutionCommandExample(RasterImage image, Stream destStream8, Stream destStream4) { RasterCodecs codecs = new RasterCodecs(); // First color-res it to 8 bits per pixel using the Netscape palette into a seperate image ColorResolutionCommand cmd = new ColorResolutionCommand(); cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage; cmd.BitsPerPixel = 8; cmd.Order = RasterByteOrder.Rgb; cmd.DitheringMethod = RasterDitheringMethod.None; cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.UsePalette; cmd.SetPalette(RasterPalette.Netscape()); cmd.Run(image); RasterImage destImage = cmd.DestinationImage; Debug.Assert(destImage.BitsPerPixel == 8); // Save it to disk codecs.Save(destImage, destStream8, RasterImageFormat.Bmp, 8); destImage.Dispose(); // Now color-res the image in-place to 4-bits per pixel using the Optimized palette cmd.Mode = ColorResolutionCommandMode.InPlace; cmd.BitsPerPixel = 4; cmd.Order = RasterByteOrder.Rgb; cmd.DitheringMethod = RasterDitheringMethod.None; cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized; cmd.Run(image); Debug.Assert(image.BitsPerPixel == 4); // Save it to disk codecs.Save(image, destStream4, RasterImageFormat.Bmp, 4); destImage.Dispose(); // Clean Up image.Dispose(); }
Public Sub ColorResolutionCommandExample(ByVal image As RasterImage, ByVal destStream8 As Stream, ByVal destStream4 As Stream)
Dim codecs As RasterCodecs = New RasterCodecs()
' First color-res it to 8 bits per pixel using the Netscape palette into a seperate image
Dim cmd As ColorResolutionCommand = New ColorResolutionCommand()
cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage
cmd.BitsPerPixel = 8
cmd.Order = RasterByteOrder.Rgb
cmd.DitheringMethod = RasterDitheringMethod.None
cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.UsePalette
cmd.SetPalette(RasterPalette.Netscape())
cmd.Run(image)
Dim destImage As RasterImage = cmd.DestinationImage
Debug.Assert(destImage.BitsPerPixel = 8)
' Save it to disk
codecs.Save(destImage, destStream8, RasterImageFormat.Bmp, 8)
destImage.Dispose()
' Now color-res the image in-place to 4-bits per pixel using the Optimized palette
cmd.Mode = ColorResolutionCommandMode.InPlace
cmd.BitsPerPixel = 4
cmd.Order = RasterByteOrder.Rgb
cmd.DitheringMethod = RasterDitheringMethod.None
cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized
cmd.Run(image)
Debug.Assert(image.BitsPerPixel = 4)
' Save it to disk
codecs.Save(image, destStream4, RasterImageFormat.Bmp, 4)
destImage.Dispose()
' Clean Up
image.Dispose()
End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
ColorResolutionCommand Members
Leadtools.ImageProcessing Namespace
Introduction to Image Processing With LEADTOOLS
Dithering Methods
Codecs.CodecsThumbnailOptions.DitheringMethod property
ImageProcessing.ColorResolutionCommand.DitheringMethod property
RasterDitheringMethod enumeration
RasterDefaults.DitheringMethod property
RasterImage.DitheringMethod property
RasterImage.DitherLine method
RasterImage.StartDithering method
RasterImage.StopDithering method
RasterBufferConverter.Convert
Convert