Class RasterCachedImage
Der Name: Aspose.Imaging Versammlung: Aspose.Imaging.dll (25.4.0)
Es handelt sich um ein Raster-Bild, das Raster-Grafiken unterstützt. Dieses Bild cachet Pixel-Daten, wenn erforderlich.
public abstract class RasterCachedImage : RasterImage, IDisposable, IObjectWithBounds, IRasterImageArgb32PixelLoader, IRasterImageRawDataLoader, IHasXmpData, IHasMetadataInheritance
object ← DisposableObject ← DataStreamSupporter ← Image ← RasterImage ← RasterCachedImage
Derived
ApngFrame , AvifImage , BmpImage , DicomPage , DjvuPage , DjvuRaster , DngImage , GifFrameBlock , Jpeg2000Image , JpegImage , PngImage , RasterCachedMultipageImage , TgaImage , TiffFrame , WebPFrameBlock
Implements
IDisposable , IObjectWithBounds , IRasterImageArgb32PixelLoader , IRasterImageRawDataLoader , IHasXmpData , IHasMetadata
Vererbte Mitglieder
RasterImage.xmpData , RasterImage.RemoveMetadata() , RasterImage.Save(Stream, ImageOptionsBase, Rectangle) , RasterImage.GetModifyDate(bool) , RasterImage.Dither(DitheringMethod, int) , RasterImage.Dither(DitheringMethod, int, IColorPalette) , RasterImage.GetDefaultPixels(Rectangle, IPartialArgb32PixelLoader) , RasterImage.GetDefaultRawData(Rectangle, IPartialRawDataLoader, RawDataSettings) , RasterImage.GetDefaultArgb32Pixels(Rectangle) , RasterImage.GetDefaultRawData(Rectangle, RawDataSettings) , RasterImage.GetArgb32Pixel(int, int) , RasterImage.GetPixel(int, int) , RasterImage.SetArgb32Pixel(int, int, int) , RasterImage.SetPixel(int, int, Color) , RasterImage.ReadScanLine(int) , RasterImage.ReadArgb32ScanLine(int) , RasterImage.WriteScanLine(int, Color[]) , RasterImage.WriteArgb32ScanLine(int, int[]) , RasterImage.LoadPartialArgb32Pixels(Rectangle, IPartialArgb32PixelLoader) , RasterImage.LoadPartialPixels(Rectangle, IPartialPixelLoader) , RasterImage.LoadArgb32Pixels(Rectangle) , RasterImage.LoadArgb64Pixels(Rectangle) , RasterImage.LoadPartialArgb64Pixels(Rectangle, IPartialArgb64PixelLoader) , RasterImage.LoadPixels(Rectangle) , RasterImage.LoadCmykPixels(Rectangle) , RasterImage.LoadCmyk32Pixels(Rectangle) , RasterImage.LoadRawData(Rectangle, RawDataSettings, IPartialRawDataLoader) , RasterImage.LoadRawData(Rectangle, Rectangle, RawDataSettings, IPartialRawDataLoader) , RasterImage.SaveRawData(byte[], int, Rectangle, RawDataSettings) , RasterImage.SaveArgb32Pixels(Rectangle, int[]) , RasterImage.SavePixels(Rectangle, Color[]) , RasterImage.SaveCmykPixels(Rectangle, CmykColor[]) , RasterImage.SaveCmyk32Pixels(Rectangle, int[]) , RasterImage.SetResolution(double, double) , RasterImage.SetPalette(IColorPalette, bool) , RasterImage.Resize(int, int, ImageResizeSettings) , RasterImage.Rotate(float, bool, Color) , RasterImage.Rotate(float) , RasterImage.BinarizeFixed(byte) , RasterImage.BinarizeOtsu() , RasterImage.BinarizeBradley(double) , RasterImage.BinarizeBradley(double, int) , RasterImage.Blend(Point, RasterImage, Rectangle, byte) , RasterImage.Blend(Point, RasterImage, byte) , RasterImage.Grayscale() , RasterImage.NormalizeHistogram() , RasterImage.AdjustBrightness(int) , RasterImage.AdjustContrast(float) , RasterImage.AdjustGamma(float, float, float) , RasterImage.AdjustGamma(float) , RasterImage.GetSkewAngle() , RasterImage.NormalizeAngle() , RasterImage.NormalizeAngle(bool, Color) , RasterImage.Filter(Rectangle, FilterOptionsBase) , RasterImage.ReplaceColor(Color, byte, Color) , RasterImage.ReplaceColor(int, byte, int) , RasterImage.ReplaceNonTransparentColors(Color) , RasterImage.ReplaceNonTransparentColors(int) , RasterImage.ToBitmap() , RasterImage.ReleaseManagedResources() , RasterImage.UpdateMetadata() , RasterImage.UpdateDimensions(int, int) , RasterImage.PremultiplyComponents , RasterImage.UseRawData , RasterImage.UpdateXmpData , RasterImage.XmpData , RasterImage.RawIndexedColorConverter , RasterImage.RawCustomColorConverter , RasterImage.RawFallbackIndex , RasterImage.RawDataSettings , RasterImage.UsePalette , RasterImage.RawDataFormat , RasterImage.RawLineSize , RasterImage.IsRawDataAvailable , RasterImage.HorizontalResolution , RasterImage.VerticalResolution , RasterImage.HasTransparentColor , RasterImage.HasAlpha , RasterImage.TransparentColor , RasterImage.ImageOpacity , RasterImage.DataLoader , Image.CanLoad(string) , Image.CanLoad(string, LoadOptions) , Image.CanLoad(Stream) , Image.CanLoad(Stream, LoadOptions) , Image.Create(ImageOptionsBase, int, int) , Image.Create(Image[]) , Image.Create(MultipageCreateOptions) , Image.Create(string[], bool) , Image.Create(string[]) , Image.Create(Image[], bool) , Image.GetFileFormat(string) , Image.GetFileFormat(Stream) , Image.GetFittingRectangle(Rectangle, int, int) , Image.GetFittingRectangle(Rectangle, int[], int, int) , Image.Load(string, LoadOptions) , Image.Load(string) , Image.Load(Stream, LoadOptions) , Image.Load(Stream) , Image.GetProportionalWidth(int, int, int) , Image.GetProportionalHeight(int, int, int) , Image.RemoveMetadata() , Image.CanSave(ImageOptionsBase) , Image.Resize(int, int) , Image.Resize(int, int, ResizeType) , Image.Resize(int, int, ImageResizeSettings) , Image.GetDefaultOptions(object[]) , Image.GetOriginalOptions() , Image.ResizeWidthProportionally(int) , Image.ResizeHeightProportionally(int) , Image.ResizeWidthProportionally(int, ResizeType) , Image.ResizeHeightProportionally(int, ResizeType) , Image.ResizeWidthProportionally(int, ImageResizeSettings) , Image.ResizeHeightProportionally(int, ImageResizeSettings) , Image.RotateFlip(RotateFlipType) , Image.Rotate(float) , Image.Crop(Rectangle) , Image.Crop(int, int, int, int) , Image.Save() , Image.Save(string) , Image.Save(string, ImageOptionsBase) , Image.Save(string, ImageOptionsBase, Rectangle) , Image.Save(Stream, ImageOptionsBase) , Image.Save(Stream, ImageOptionsBase, Rectangle) , Image.GetSerializedStream(ImageOptionsBase, Rectangle, out int) , Image.SetPalette(IColorPalette, bool) , Image.UpdateContainer(Image) , Image.GetCanNotSaveMessage(ImageOptionsBase) , Image.GetFitRectangle(Rectangle) , Image.GetImage2Export(ImageOptionsBase, Rectangle, IImageExporter) , Image.GetFitRectangle(Rectangle, int[]) , Image.OnPaletteChanged(IColorPalette, IColorPalette) , Image.OnPaletteChanging(IColorPalette, IColorPalette) , Image.ReleaseManagedResources() , Image.BitsPerPixel , Image.Bounds , Image.Container , Image.Height , Image.Palette , Image.UsePalette , Image.Size , Image.Width , Image.InterruptMonitor , Image.BufferSizeHint , Image.AutoAdjustPalette , Image.HasBackgroundColor , Image.FileFormat , Image.BackgroundColor , DataStreamSupporter.timeout , DataStreamSupporter.CacheData() , DataStreamSupporter.Save() , DataStreamSupporter.Save(Stream) , DataStreamSupporter.Save(string) , DataStreamSupporter.Save(string, bool) , DataStreamSupporter.SaveData(Stream) , DataStreamSupporter.ReleaseManagedResources() , DataStreamSupporter.OnDataStreamContainerChanging(StreamContainer) , DataStreamSupporter.DataStreamContainer , DataStreamSupporter.IsCached , DisposableObject.Dispose() , DisposableObject.ReleaseManagedResources() , DisposableObject.ReleaseUnmanagedResources() , DisposableObject.VerifyNotDisposed() , DisposableObject.Disposed , object.GetType() , object.MemberwiseClone() , object.ToString() , object.Equals(object?) , object.Equals(object?, object?) , object.ReferenceEquals(object?, object?) , object.GetHashCode()
Examples
Das folgende Beispiel verwandelt ein farbiges Raster-Cached-Bild in seine grayscale-Repräsentation. Grayscale-Bildungen bestehen ausschließlich aus grauen Schatten und tragen nur Intensitätsinformationen.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
rasterImage.Grayscale();
rasterImage.Save(dir + "sample.Grayscale.png");
}Constructors
RasterCachedImage()
Initialisiert eine neue Instanz der Aspose.Imaging.RasterCachedImage Klasse.
protected RasterCachedImage()RasterCachedImage(ICOLORPALETTE)
Initialisiert eine neue Instanz der Aspose.Imaging.RasterCachedImage Klasse.
protected RasterCachedImage(IColorPalette colorPalette)Parameters
colorPalette IColorPalette
Die Farbe Palette.
Properties
IsCached
Er erhält einen Wert, der angibt, ob Bilddaten derzeit verschlüsselt sind.
public override bool IsCached { get; }Eigentumswert
Methods
AdjustBrightness(Int)
Anpassung einer Beleuchtung für Bild.
public override void AdjustBrightness(int brightness)Parameters
brightness int
Brightness Wert ist.
Examples
Im folgenden Beispiel wird die Glanzkorrektur eines raster cached Bildes durchgeführt.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Set the brightness value. The accepted values of brightness are in the range [-255, 255].
rasterImage.AdjustBrightness(50);
rasterImage.Save(dir + "sample.AdjustBrightness.png");
}AdjustContrast(Flotte)
Bildkontrast
public override void AdjustContrast(float contrast)Parameters
contrast float
Kontrastwert (in Range [-100; 100])
Examples
Das folgende Beispiel führt eine Kontrastkorrektur eines Raster-Cached-Bilds durch.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Set the contrast value. The accepted values of contrast are in the range [-100f, 100f].
rasterImage.AdjustContrast(50);
rasterImage.Save(dir + "sample.AdjustContrast.png");
}AdjustGamma(Flotte, Flotte und Flotte)
Gamma Korrektur eines Bildes.
public override void AdjustGamma(float gammaRed, float gammaGreen, float gammaBlue)Parameters
gammaRed float
Gamma für den roten Kanalkoeffizient
gammaGreen float
Gamma für Grünkanalkoeffizient
gammaBlue float
Gamma für Blue Channel Coefficient
Examples
Das folgende Beispiel führt eine Gamma- Korrektur eines Raster-Cached-Bilds durch, das verschiedene Koeffizienten für Farbkomponenten anwendet.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Set individual gamma coefficients for red, green and blue channels.
rasterImage.AdjustGamma(1.5f, 2.5f, 3.5f);
rasterImage.Save(dir + "sample.AdjustGamma.png");
}AdjustGamma(Flotte)
Gamma Korrektur eines Bildes.
public override void AdjustGamma(float gamma)Parameters
gamma float
Gamma für rote, grüne und blaue Kanäle Coefficient
Examples
Das folgende Beispiel führt eine Gamma-Korrektur eines Raster-Cached-Bilds durch.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Set gamma coefficient for red, green and blue channels.
rasterImage.AdjustGamma(2.5f);
rasterImage.Save(dir + "sample.AdjustGamma.png");
}BinarizeBradley(Doppelt, Int)
Binarisierung eines Bildes mit Bradley’s adaptive Frontierungsalgorithmus mit der integrierten Bildfrontierung
public override void BinarizeBradley(double brightnessDifference, int windowSize)Parameters
brightnessDifference double
Der Lichtunterschied zwischen dem Pixel und dem Durchschnitt eines s x s Fensters von Pixeln, die um diesen Pixel zentriert sind.
windowSize int
Die Größe des s x s Fensters von Pixeln, die um diesen Pixel zentriert sind
Examples
Das folgende Beispiel binarisiert ein raster cached Bild mit Bradley’s adaptive Frontierung-Algorithmus mit der angegebenen Fenstergröße.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Binarize the image with a brightness difference of 5.
// The brightness is a difference between a pixel and the average of an 10 x 10 window of pixels centered around this pixel.
rasterImage.BinarizeBradley(5, 10);
rasterImage.Save(dir + "sample.BinarizeBradley5_10x10.png");
}BinarizeBradley(doppelt)
Binarisierung eines Bildes mit Bradley’s adaptive Frontierungsalgorithmus mit der integrierten Bildfrontierung
public override void BinarizeBradley(double brightnessDifference)Parameters
brightnessDifference double
Der Lichtunterschied zwischen dem Pixel und dem Durchschnitt eines s x s Fensters von Pixeln, die um diesen Pixel zentriert sind.
Examples
Das folgende Beispiel binarisiert ein raster cached Bild mit Bradley’s adaptive thresholding algorithm. binarisierte Bilder enthalten nur 2 Farben - schwarz und wei.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Binarize the image with a brightness difference of 5.
// The brightness is a difference between a pixel and the average of an s x s window of pixels centered around this pixel.
// The size of window will be calibrated automatically.
rasterImage.BinarizeBradley(5);
rasterImage.Save(dir + "sample.BinarizeBradley5.png");
}BinarizeFixed(byte)
Binarisierung eines Bildes mit vordefinierter Grenze
public override void BinarizeFixed(byte threshold)Parameters
threshold byte
Wenn der entsprechende graue Wert eines Pixels größer ist als der Grenzwert, wird ihm ein Wert von 255 zugeordnet, 0 sonst.
Examples
Das folgende Beispiel binarisiert ein raster cached Bild mit der vordefinierten Grenze. binarisierte Bilder enthalten nur 2 Farben - schwarz und wei.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Binarize the image with a threshold value of 127.
// If a corresponding gray value of a pixel is greater than 127, a value of 255 will be assigned to it, 0 otherwise.
rasterImage.BinarizeFixed(127);
rasterImage.Save(dir + "sample.BinarizeFixed.png");
}BinarizeOtsu()
Binarisierung eines Bildes mit Otsu-Grenze
public override void BinarizeOtsu()Examples
Das folgende Beispiel binarisiert ein Raster-Cached-Bild mit Otsu-Grenze. binarisierte Bilder enthalten nur 2 Farben - Schwarz und Wei.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Binarize the image with Otsu thresholding.
rasterImage.BinarizeOtsu();
rasterImage.Save(dir + "sample.BinarizeOtsu.png");
}Blend(Punkt, RasterImage, Rectangle, Byte)
Mischen Sie diese Bildinstanz mit dem overlay’ Bild.
public override void Blend(Point origin, RasterImage overlay, Rectangle overlayArea, byte overlayAlpha = 255)Parameters
origin Point
Das Hintergrundbild blendender Herkunft.
overlay RasterImage
Das überladende Bild.
overlayArea Rectangle
Das Overlay-Gebiet.
overlayAlpha byte
Die Überschwemmung der Alpha.
CacheData()
Es versteckt die Daten und sorgt dafür, dass keine zusätzlichen Datenladungen vom unteren Aspose.Imaging.DataStreamSupporter.DataStreamContainer durchgeführt werden.
public override void CacheData()Examples
Das folgende Beispiel zeigt, wie raster image caching die Leistung beeinflusst. im Allgemeinen wird das Lesen von cached-Daten schneller durchgeführt als das Lesen von nicht cached-Daten.
string dir = "c:\\temp\\";
// Load an image from a PNG file.
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
// Cache all pixel data so that no additional data loading will be performed from the underlying data stream
image.CacheData();
System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
// Reading all pixels is pretty fast.
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
int color = image.GetArgb32Pixel(x, y);
}
}
stopwatch.Stop();
System.Console.WriteLine("Reading all cached pixels took {0} ms.", stopwatch.ElapsedMilliseconds);
}
// Load an image from a PNG file
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
// Reading all pixels is not as fast as when caching
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
int color = image.GetArgb32Pixel(x, y);
}
}
stopwatch.Stop();
System.Console.WriteLine("Reading all pixels without preliminary caching took {0} ms.", stopwatch.ElapsedMilliseconds);
}
// The output may look like this:
// Reading all cached pixels took 1500 ms.
// Reading all pixels without preliminary caching took 150000 ms.Crop(Rectangle)
Das Bild schneiden.
public override void Crop(Rectangle rectangle)Parameters
rectangle Rectangle
Die rechte Ecke.
Examples
Das folgende Beispiel erzeugt ein raster cached Bild. Die Erntefläche wird über Aspose.Imaging.Rectangle angegeben.
string dir = @"c:\temp\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
// Crop the image. The cropping area is the rectangular central area of the image.
Aspose.Imaging.Rectangle area = new Aspose.Imaging.Rectangle(rasterImage.Width / 4, rasterImage.Height / 4, rasterImage.Width / 2, rasterImage.Height / 2);
rasterImage.Crop(area);
// Save the cropped image to PNG
rasterImage.Save(dir + "sample.Crop.png");
}Dither(DitheringMethod, int, IColorPalette)
Ausführungen, die sich auf das aktuelle Bild auswirken.
public override void Dither(DitheringMethod ditheringMethod, int bitsCount, IColorPalette customPalette)Parameters
ditheringMethod DitheringMethod
Die Dithering Methode.
bitsCount int
Die letzten Bits zählen für Dithering.
customPalette IColorPalette
Die gewöhnliche Palette für Dithering.
Grayscale()
Umwandlung eines Bildes in seine grayscale Darstellung
public override void Grayscale()Examples
Das folgende Beispiel verwandelt ein farbiges Raster-Cached-Bild in seine grayscale-Repräsentation. Grayscale-Bildungen bestehen ausschließlich aus grauen Schatten und tragen nur Intensitätsinformationen.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
Aspose.Imaging.RasterCachedImage rasterImage = (Aspose.Imaging.RasterCachedImage)image;
rasterImage.Grayscale();
rasterImage.Save(dir + "sample.Grayscale.png");
}NormalizeHistogram()
Normalisieren Sie das Bildhistogram – passen Sie die Pixelwerte an, um alle verfügbaren Bereiche zu verwenden.
public override void NormalizeHistogram()OnCached()
Anruf, wenn die Daten verschlüsselt werden und alle damit verbundenen Ressourcen deallokiert werden können.
protected virtual void OnCached()OnPaletteChanged(IColorPalette und IColorPalette)
Anrufen, wenn die Palette geändert wird.
protected override void OnPaletteChanged(IColorPalette oldPalette, IColorPalette newPalette)Parameters
oldPalette IColorPalette
Die alte Palette.
newPalette IColorPalette
Die neue Palette.
Resize(int, int, ResizeType)
Wiederherstellen des Bildes.
public override void Resize(int newWidth, int newHeight, ResizeType resizeType)Parameters
newWidth int
Die neue Breite.
newHeight int
Die neue Höhe.
resizeType ResizeType
Die Resize Art.
Examples
Dieses Beispiel laden ein raster cached Bild auf und resisiert es mit verschiedenen Resisierungsmethoden.
string dir = "c:\\temp\\";
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
// Scale up by 2 times using Nearest Neighbour resampling.
image.Resize(image.Width* 2, image.Height* 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
// Save to PNG with default options.
image.Save(dir + "upsample.nearestneighbour.png", new Aspose.Imaging.ImageOptions.PngOptions());
}
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
// Scale down by 2 times using Nearest Neighbour resampling.
image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
// Save to PNG with default options.
image.Save(dir + "downsample.nearestneighbour.png", new Aspose.Imaging.ImageOptions.PngOptions());
}
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
// Scale up by 2 times using Bilinear resampling.
image.Resize(image.Width* 2, image.Height* 2, Aspose.Imaging.ResizeType.BilinearResample);
// Save to PNG with default options.
image.Save(dir + "upsample.bilinear.png", new Aspose.Imaging.ImageOptions.PngOptions());
}
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
// Scale down by 2 times using Bilinear resampling.
image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.BilinearResample);
// Save to PNG with default options.
image.Save(dir + "downsample.bilinear.png", new Aspose.Imaging.ImageOptions.PngOptions());
}Resize(int, int, ImageResizeSettings)
Wiederherstellen des Bildes.
public override void Resize(int newWidth, int newHeight, ImageResizeSettings settings)Parameters
newWidth int
Die neue Breite.
newHeight int
Die neue Höhe.
settings ImageResizeSettings
Die Resize Einstellungen.
Examples
Dieses Beispiel laden ein raster cached Bild auf und resiziert es mit verschiedenen resizing-Einstellungen.
string dir = "c:\\temp\\";
Aspose.Imaging.ImageResizeSettings resizeSettings = new Aspose.Imaging.ImageResizeSettings();
// The adaptive algorithm based on weighted and blended rational function and lanczos3 interpolation.
resizeSettings.Mode = Aspose.Imaging.ResizeType.AdaptiveResample;
// The small rectangular filter
resizeSettings.FilterType = Aspose.Imaging.ImageFilterType.SmallRectangular;
// The number of colors in the palette.
resizeSettings.EntriesCount = 256;
// The color quantization is not used
resizeSettings.ColorQuantizationMethod = ColorQuantizationMethod.None;
// The euclidian method
resizeSettings.ColorCompareMethod = ColorCompareMethod.Euclidian;
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.png"))
{
// Scale down by 2 times using adaptive resampling.
image.Resize(image.Width / 2, image.Height / 2, resizeSettings);
image.Save(dir + "downsample.adaptive.png", new Aspose.Imaging.ImageOptions.PngOptions());
}Rotate(Float, Bool, Farbe)
Drehen Sie das Bild um das Zentrum.
public override void Rotate(float angle, bool resizeProportionally, Color backgroundColor)Parameters
angle float
Der Rotationswinkel in Grad. Positive Werte werden die Uhr drehen.
resizeProportionally bool
Wenn Sie auf “richtig” festgelegt sind, werden Sie Ihre Bildgröße gemäß rotierten Rechtangeln (Kornpunkte) Prognosen geändert haben, in anderen Fällen, die Dimensionen unberührt lassen und nur interne Bildgehalte rotierten.
backgroundColor Color
Farbe des Hintergrunds.
RotateFlip(RotateFlipType)
Rotiert, fließt oder dreht und fließt das Bild.
public override void RotateFlip(RotateFlipType rotateFlipType)Parameters
rotateFlipType RotateFlipType
Der Rotate Flip Typ.
Examples
Dieses Beispiel ladet ein raster cached Bild, dreht es um 90 Grad Uhr und optionell fließt das Bild horizontaler und/oder vertikalerweise.
string dir = "c:\\temp\\";
Aspose.Imaging.RotateFlipType[] rotateFlipTypes = new Aspose.Imaging.RotateFlipType[]
{
Aspose.Imaging.RotateFlipType.Rotate90FlipNone,
Aspose.Imaging.RotateFlipType.Rotate90FlipX,
Aspose.Imaging.RotateFlipType.Rotate90FlipXY,
Aspose.Imaging.RotateFlipType.Rotate90FlipY,
};
foreach (Aspose.Imaging.RotateFlipType rotateFlipType in rotateFlipTypes)
{
// Rotate, flip and save to the output file.
using (Aspose.Imaging.RasterCachedImage image = (Aspose.Imaging.RasterCachedImage)Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
image.RotateFlip(rotateFlipType);
image.Save(dir + "sample." + rotateFlipType + ".bmp");
}
}
