Class RasterCachedImage
Navne til: Aspose.Imaging Sammensætning: Aspose.Imaging.dll (25.4.0)
Representerer et rasterbillede, der understøtter rastergrafikoperationer. Dette billede cacher pixeldata, når det er nødvendigt.
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
De arvede medlemmer
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
Følgende eksempel forvandler et farvet raster cached billede til sin gråskala repræsentation. Grayscale billeder består udelukkende af skygge af grå og bærer kun intensitetsoplysninger.
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()
Initialiserer en ny instans af Aspose.Imaging.RasterCachedImage klasse.
protected RasterCachedImage()RasterCachedImage(ICOLORPalette)
Initialiserer en ny instans af Aspose.Imaging.RasterCachedImage klasse.
protected RasterCachedImage(IColorPalette colorPalette)Parameters
colorPalette IColorPalette
Den farve palette.
Properties
IsCached
Giver en værdi, der angiver, om billeddata er cachet i øjeblikket.
public override bool IsCached { get; }Ejendomsværdi
Methods
AdjustBrightness(Int)
Tilpasning af lys for billedet.
public override void AdjustBrightness(int brightness)Parameters
brightness int
Lysets værdi.
Examples
Følgende eksempel foretager lysjustering af et raster cached billede.
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(Flåder)
Billedkontrast
public override void AdjustContrast(float contrast)Parameters
contrast float
Kontrastværdi (i rækkefølge [-100; 100])
Examples
Følgende eksempel udfører kontrast korrigering af et raster cached billede.
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(Flåder, Flåder og Flåder)
Gamma-korrektion af et billede.
public override void AdjustGamma(float gammaRed, float gammaGreen, float gammaBlue)Parameters
gammaRed float
Gamma for rødkanal koefficient
gammaGreen float
Gamma for grøn kanal koefficient
gammaBlue float
Gamma for blå kanal koefficient
Examples
Følgende eksempel udfører gamma-korrektion af et raster cached billede, der anvender forskellige koefficienter til farvekomponenter.
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(Flåder)
Gamma-korrektion af et billede.
public override void AdjustGamma(float gamma)Parameters
gamma float
Gamma for røde, grønne og blå kanaler
Examples
Følgende eksempel udfører gamma-korrektion af et raster cached billede.
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(Dobbelt og int)
Binarisering af et billede ved hjælp af Bradley’s adaptive grænseoverskridende algoritme ved hjælp af den integrerede image grænseoverskridende
public override void BinarizeBradley(double brightnessDifference, int windowSize)Parameters
brightnessDifference double
Den lysforskel mellem piksler og gennemsnittet af et s x s vindue af piksler centreret omkring denne piksel.
windowSize int
Størrelsen af s x s vindue af piksler centreret omkring denne piksel
Examples
Følgende eksempel binariserer et raster cached billede med Bradley’s adaptive træk algoritme med den angivne vinduesstørrelse.
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(dobbelt)
Binarisering af et billede ved hjælp af Bradley’s adaptive grænseoverskridende algoritme ved hjælp af den integrerede image grænseoverskridende
public override void BinarizeBradley(double brightnessDifference)Parameters
brightnessDifference double
Den lysforskel mellem piksler og gennemsnittet af et s x s vindue af piksler centreret omkring denne piksel.
Examples
Følgende eksempel binariserer et raster cached billede med Bradley’s adaptive grænseoverskridende algoritme. binære billeder indeholder kun 2 farver - sort og hvid.
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 af et billede med en fordefineret grænse
public override void BinarizeFixed(byte threshold)Parameters
threshold byte
Hvis den tilsvarende grå værdi af en pixel er større end grænsen, vil der tildeles en værdi af 255 til den, 0 ellers.
Examples
Følgende eksempel binariserer et raster cached billede med den forhåndsdefinerede grænse. binære billeder indeholder kun 2 farver - sort og hvid.
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 af et billede med Otsu
public override void BinarizeOtsu()Examples
Følgende eksempel binariserer et raster cached billede med Otsu grænse. binære billeder indeholder kun 2 farver - sort og hvid.
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(Point, RasterImage, Rectangle, byte)
Blend denne billedinstans med overlay’ billedet.
public override void Blend(Point origin, RasterImage overlay, Rectangle overlayArea, byte overlayAlpha = 255)Parameters
origin Point
Den baggrundsbillede blendende oprindelse.
overlay RasterImage
Det overlydende billede.
overlayArea Rectangle
Det overladte område.
overlayAlpha byte
Den overladte alfa.
CacheData()
Det skjuler dataene og sikrer, at der ikke udføres yderligere opladning af data fra underliggende Aspose.Imaging.DataStreamSupporter.
public override void CacheData()Examples
Følgende eksempel viser, hvordan raster image caching påvirker ydeevnen.I almindelighed udføres læse cached data hurtigere end læse ikke-cache 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)
Skrue billedet ud.
public override void Crop(Rectangle rectangle)Parameters
rectangle Rectangle
Det rektangulære.
Examples
Følgende eksempel skaber et raster cached billede. skabningsområdet angives 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)
Der er tale om optagelse af det aktuelle billede.
public override void Dither(DitheringMethod ditheringMethod, int bitsCount, IColorPalette customPalette)Parameters
ditheringMethod DitheringMethod
Den dyderende metode.
bitsCount int
De sidste bits tæller for dithering.
customPalette IColorPalette
Det er den sædvanlige palette til dithering.
Grayscale()
Omdannelse af et billede til sin grayscale repræsentation
public override void Grayscale()Examples
Følgende eksempel forvandler et farvet raster cached billede til sin gråskala repræsentation. Grayscale billeder består udelukkende af skygge af grå og bærer kun intensitetsoplysninger.
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()
Normaliserer billedhistogrammet – justerer pixelværdier til at bruge alle de tilgængelige rækkevidde.
public override void NormalizeHistogram()OnCached()
Opkaldt, når data er cachet, og alle relaterede ressourcer kan blive deallokeret.
protected virtual void OnCached()OnPaletteChanged(Fællesskab, Fællesskab)
Det kaldes, når paletten ændres.
protected override void OnPaletteChanged(IColorPalette oldPalette, IColorPalette newPalette)Parameters
oldPalette IColorPalette
Den gamle palette.
newPalette IColorPalette
Den nye palette.
Resize(Int, Int, ResizeType)
genopretter billedet.
public override void Resize(int newWidth, int newHeight, ResizeType resizeType)Parameters
newWidth int
Den nye bredde.
newHeight int
Den nye højde.
resizeType ResizeType
Den modsatte type.
Examples
Dette eksempel lader et raster cached billede og resyser det ved hjælp af forskellige 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 og ImageResizeSettings)
genopretter billedet.
public override void Resize(int newWidth, int newHeight, ImageResizeSettings settings)Parameters
newWidth int
Den nye bredde.
newHeight int
Den nye højde.
settings ImageResizeSettings
De tilbagevendende indstillinger.
Examples
Dette eksempel oplader et raster cached billede og resyser det ved hjælp af forskellige resizing indstillinger.
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(flåd, bool, farve)
Gør billedet rundt i centrum.
public override void Rotate(float angle, bool resizeProportionally, Color backgroundColor)Parameters
angle float
Den roterende hjørne i grader. Positive værdier vil rotere klokkevis.
resizeProportionally bool
Hvis du har indstillet til ’true’ vil du have din billedstørrelse ændret i henhold til roterede rektangle (kornpunkter) projektioner i andet tilfælde, der forlader dimensioner ukrudt og kun interne billedindhold er roteret.
backgroundColor Color
Farve af baggrunden.
RotateFlip(RotateFlipType)
Roterer, flips eller roterer og flips billedet.
public override void RotateFlip(RotateFlipType rotateFlipType)Parameters
rotateFlipType RotateFlipType
Den roterede flip type.
Examples
Dette eksempel oplader et raster cached billede, roterer det ved 90 grader klockvis og optionelt fliberer billedet horisontalt og/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");
}
}
