Class RasterCachedImage
Namn på plats: Aspose.Imaging Församling: Aspose.Imaging.dll (25.4.0)
Representerar en rasterbild som stöder rastergrafikverksamhet. Denna bild cache pixeldata när det behövs.
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
Arvsmedlemmar
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
Följande exempel omvandlar en färgad raster cached bild till sin gråskala representation. Grayscale bilder består uteslutande av skuggor av grå och bär endast intensitetsinformation.
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()
Initialiserar en ny instans av Aspose.Imaging.RasterCachedImage klass.
protected RasterCachedImage()RasterCachedImage(Färgpalett)
Initialiserar en ny instans av Aspose.Imaging.RasterCachedImage klass.
protected RasterCachedImage(IColorPalette colorPalette)Parameters
colorPalette IColorPalette
Färgpaletten är.
Properties
IsCached
Det får ett värde som anger om bilddata är cachade för närvarande.
public override bool IsCached { get; }Fastighetsvärde
Methods
AdjustBrightness(int)
Anpassa en ljusstyrka för bild.
public override void AdjustBrightness(int brightness)Parameters
brightness int
ljusets värde.
Examples
Följande exempel utför briljant korrigering av en raster cached bild.
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(Flotta)
bildkontrast
public override void AdjustContrast(float contrast)Parameters
contrast float
Kontrastvärde (i intervall [-100; 100])
Examples
Följande exempel gör kontrast korrigering av en raster cached bild.
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(flotta, flotta och flotta)
Gamma korrigering av en bild.
public override void AdjustGamma(float gammaRed, float gammaGreen, float gammaBlue)Parameters
gammaRed float
Gamma för rödkanalkoefficient
gammaGreen float
Gamma för grön kanalkoefficient
gammaBlue float
Gamma för blåkanalkoefficient
Examples
Följande exempel utför gamma-korrigering av en raster cached bild som tillämpar olika koefficienter för färgkomponenter.
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(Flotta)
Gamma korrigering av en bild.
public override void AdjustGamma(float gamma)Parameters
gamma float
Gamma för röda, gröna och blå kanaler koefficient
Examples
Följande exempel utför gamma-korrigering av en raster cached bild.
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(dubbel, int)
Binarisering av en bild med hjälp av Bradleys adaptiva tröskelvärde algoritm med hjälp av integrerad bildtröskelvärde
public override void BinarizeBradley(double brightnessDifference, int windowSize)Parameters
brightnessDifference double
Skillnaden i ljusstyrka mellan pixel och genomsnittet av ett s x s fönster av pixlar som är inriktade runt denna pixel.
windowSize int
Storleken på s x s fönstret av pixlar som är inriktade runt denna pixel
Examples
Följande exempel binariserar en raster cached bild med Bradleys adaptiva gränsvärde algoritm med angiven fönsterstorlek. binariserade bilder innehåller bara 2 färger - svart och vitt.
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(dubbel)
Binarisering av en bild med hjälp av Bradleys adaptiva tröskelvärde algoritm med hjälp av integrerad bildtröskelvärde
public override void BinarizeBradley(double brightnessDifference)Parameters
brightnessDifference double
Skillnaden i ljusstyrka mellan pixel och genomsnittet av ett s x s fönster av pixlar som är inriktade runt denna pixel.
Examples
Följande exempel binariserar en raster cached bild med Bradleys adaptiva gränsvärdealgoritm. binära bilder innehåller bara 2 färger - svart och vitt.
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)
Binarisering av en bild med fördefinierad gräns
public override void BinarizeFixed(byte threshold)Parameters
threshold byte
Om motsvarande gråvärde för en pixel är större än gränsen, tilldelas det ett värde av 255 eller 0 annars.
Examples
Följande exempel binariserar en raster cached bild med den fördefinierade gränsen. binariserade bilder innehåller bara 2 färger - svart och vitt.
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()
Binarisering av en bild med Otsu-gränssnitt
public override void BinarizeOtsu()Examples
Följande exempel binariserar en raster cached bild med Otsu gränssnitt. binariserade bilder innehåller bara 2 färger - svart och vitt.
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(Poäng, RasterImage, Rectangle, byte)
Blanda denna bild instans med bilden overlay".
public override void Blend(Point origin, RasterImage overlay, Rectangle overlayArea, byte overlayAlpha = 255)Parameters
origin Point
Bakgrunden bild bländande ursprung.
overlay RasterImage
Den överlägsna bilden.
overlayArea Rectangle
överlägset område.
overlayAlpha byte
Den överlägsen alfa.
CacheData()
Däckar data och säkerställer att inga ytterligare data laddningar kommer att utföras från underliggande Aspose.Imaging.DataStreamSupporter.DataStreamContainer.
public override void CacheData()Examples
Följande exempel visar hur raster image caching påverkar prestanda.I det allmänna fallet görs läsning av cached data snabbare än läsning av icke-cased data.
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)
Skruva upp bilden.
public override void Crop(Rectangle rectangle)Parameters
rectangle Rectangle
och rektangeln.
Examples
Följande exempel odlar en raster cached bild. odlingsområdet anges via Aspose.Imaging.Rectangle.
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)
Föreställningar dyter på den nuvarande bilden.
public override void Dither(DitheringMethod ditheringMethod, int bitsCount, IColorPalette customPalette)Parameters
ditheringMethod DitheringMethod
Metoden för att diktera.
bitsCount int
De sista bitarna räknar för dithering.
customPalette IColorPalette
Den vanliga paletten för dithering.
Grayscale()
Omvandling av en bild till sin gråskala representation
public override void Grayscale()Examples
Följande exempel omvandlar en färgad raster cached bild till sin gråskala representation. Grayscale bilder består uteslutande av skuggor av grå och bär endast intensitetsinformation.
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()
Normaliserar bilden histogram – justerar pixelvärden för att använda alla tillgängliga intervall.
public override void NormalizeHistogram()OnCached()
Kallas när data cacheras och alla relaterade resurser kan deallokeras.
protected virtual void OnCached()OnPaletteChanged(Föregående inläggFöregående IColorPalette)
Kallas när paletten ändras.
protected override void OnPaletteChanged(IColorPalette oldPalette, IColorPalette newPalette)Parameters
oldPalette IColorPalette
Den gamla paletten.
newPalette IColorPalette
Den nya paletten.
Resize(int, int, resizeType)
återställer bilden.
public override void Resize(int newWidth, int newHeight, ResizeType resizeType)Parameters
newWidth int
Den nya bredden.
newHeight int
Den nya höjden.
resizeType ResizeType
Den återställande typen.
Examples
Detta exempel lader en raster cached bild och resyser den med hjälp av olika resizing metoder.
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)
återställer bilden.
public override void Resize(int newWidth, int newHeight, ImageResizeSettings settings)Parameters
newWidth int
Den nya bredden.
newHeight int
Den nya höjden.
settings ImageResizeSettings
De återställda inställningarna.
Examples
Detta exempel lader en raster cached bild och resyser den med hjälp av olika resizing inställningar.
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, färg)
Rotera bilden runt centrum.
public override void Rotate(float angle, bool resizeProportionally, Color backgroundColor)Parameters
angle float
Den roterade vinkeln i grader. Positiva värden roterar klockvis.
resizeProportionally bool
Om du ställer in “true” har du ändrat din bildstorlek i enlighet med roterade rektangulära (kornpunkter) projektioner i annat fall som lämnar dimensioner orörda och endast interna bildinnehåll roteras.
backgroundColor Color
Färgen på bakgrunden.
RotateFlip(RotateFlipType)
Roterar, flips, eller roterar och flips bilden.
public override void RotateFlip(RotateFlipType rotateFlipType)Parameters
rotateFlipType RotateFlipType
Den roterade flip typen.
Examples
Detta exempel laddar en raster cached bild, roterar den med 90 grader klockvis och alternativt flips bilden horisontellt och/eller vertikalt.
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");
}
}
