Class RasterImage
Contents
[
Hide
]RasterImage class
Represents a raster image supporting raster graphics operations.
public abstract class RasterImage : Image, IHasXmpData, IRasterImageArgb32PixelLoader
Properties
| Name | Description |
|---|---|
| AutoAdjustPalette { get; set; } | Gets or sets a value indicating whether automatic adjust palette. |
| virtual BackgroundColor { get; set; } | Gets or sets a value for the background color. |
| abstract BitsPerPixel { get; } | Gets the image bits per pixel count. |
| Bounds { get; } | Gets the image bounds. |
| BufferSizeHint { get; set; } | Gets or sets the buffer size hint which is defined max allowed size for all internal buffers. |
| Container { get; } | Gets the Image container. |
| DataStreamContainer { get; } | Gets the object’s data stream. |
| Disposed { get; } | Gets a value indicating whether this instance is disposed. |
| virtual FileFormat { get; } | Gets a value of file format |
| virtual HasAlpha { get; } | Gets a value indicating whether this instance has alpha. |
| virtual HasBackgroundColor { get; set; } | Gets or sets a value indicating whether image has background color. |
| virtual HasTransparentColor { get; set; } | Gets a value indicating whether image has transparent color. |
| abstract Height { get; } | Gets the image height. |
| virtual HorizontalResolution { get; set; } | Gets or sets the horizontal resolution, in pixels per inch, of this RasterImage. |
| virtual ImageOpacity { get; } | Gets opacity of this image. |
| InterruptMonitor { get; set; } | Gets or sets the interrupt monitor. |
| abstract IsCached { get; } | Gets a value indicating whether object’s data is cached currently and no data reading is required. |
| IsRawDataAvailable { get; } | Gets a value indicating whether raw data loading is available. |
| Palette { get; set; } | Gets or sets the color palette. The color palette is not used when pixels are represented directly. |
| virtual PremultiplyComponents { get; set; } | Gets or sets a value indicating whether the image components must be premultiplied. |
| RawCustomColorConverter { get; set; } | Gets or sets the custom color converter |
| virtual RawDataFormat { get; } | Gets the raw data format. |
| RawDataSettings { get; } | Gets the current raw data settings. Note when using these settings the data loads without conversion. |
| RawFallbackIndex { get; set; } | Gets or sets the fallback index to use when palette index is out of bounds |
| RawIndexedColorConverter { get; set; } | Gets or sets the indexed color converter |
| virtual RawLineSize { get; } | Gets the raw line size in bytes. |
| Size { get; } | Gets the image size. |
| virtual TransparentColor { get; set; } | Gets the image transparent color. |
| virtual UpdateXmpData { get; set; } | Gets or sets a value indicating whether to update the XMP metadata. |
| override UsePalette { get; } | Gets a value indicating whether the image palette is used. |
| virtual UseRawData { get; set; } | Gets or sets a value indicating whether to use raw data loading when the raw data loading is available. |
| virtual VerticalResolution { get; set; } | Gets or sets the vertical resolution, in pixels per inch, of this RasterImage. |
| abstract Width { get; } | Gets the image width. |
| virtual XmpData { get; set; } | Gets or sets the XMP metadata. |
Methods
| Name | Description |
|---|---|
| virtual AdjustBrightness(int) | Adjust of a brightness for image. |
| virtual AdjustContrast(float) | Image contrasting |
| virtual AdjustGamma(float) | Gamma-correction of an image. |
| virtual AdjustGamma(float, float, float) | Gamma-correction of an image. |
| virtual BinarizeBradley(double) | Binarization of an image using Bradley’s adaptive thresholding algorithm using the integral image thresholding |
| virtual BinarizeBradley(double, int) | Binarization of an image using Bradley’s adaptive thresholding algorithm using the integral image thresholding |
| virtual BinarizeFixed(byte) | Binarization of an image with predefined threshold |
| virtual BinarizeOtsu() | Binarization of an image with Otsu thresholding |
| Blend(Point, RasterImage, byte) | Blends this image instance with the overlay image. |
| virtual Blend(Point, RasterImage, Rectangle, byte) | Blends this image instance with the overlay image. |
| abstract CacheData() | Caches the data and ensures no additional data loading will be performed from the underlying DataStreamContainer. |
| CanSave(ImageOptionsBase) | Determines whether image can be saved to the specified file format represented by the passed save options. |
| virtual Crop(Rectangle) | Crops the specified rectangle. |
| virtual Crop(int, int, int, int) | Crop image with shifts. |
| Dispose() | Disposes the current instance. |
| Dither(DitheringMethod, int) | Performs dithering on the current image. |
| abstract Dither(DitheringMethod, int, IColorPalette) | Performs dithering on the current image. |
| virtual Filter(Rectangle, FilterOptionsBase) | Filters the specified rectangle. |
| GetArgb32Pixel(int, int) | Gets an image 32-bit ARGB pixel. |
| GetDefaultArgb32Pixels(Rectangle) | Gets the default 32-bit ARGB pixels array. |
| virtual GetDefaultOptions(object[]) | Gets the default options. |
| GetDefaultPixels(Rectangle, IPartialArgb32PixelLoader) | Gets the default pixels array using partial pixel loader. |
| GetDefaultRawData(Rectangle, RawDataSettings) | Gets the default raw data array. |
| GetDefaultRawData(Rectangle, IPartialRawDataLoader, RawDataSettings) | Gets the default raw data array using partial pixel loader. |
| virtual GetModifyDate(bool) | Gets the date and time the resource image was last modified. |
| virtual GetOriginalOptions() | Gets the options based on the original file settings. This can be helpful to keep bit-depth and other parameters of the original image unchanged. For example, if we load a black-white PNG image with 1 bit per pixel and then save it using the Save method, the output PNG image with 8-bit per pixel will be produced. To avoid it and save PNG image with 1-bit per pixel, use this method to get corresponding saving options and pass them to the Save method as the second parameter. |
| GetPixel(int, int) | Gets an image pixel. |
| virtual GetSerializedStream(ImageOptionsBase, Rectangle, out int) | Converts to aps. |
| GetSkewAngle() | Gets the skew angle. This method is applicable to scanned text documents, to determine the skew angle when scanning. |
| virtual Grayscale() | Transformation of an image to its grayscale representation |
| LoadArgb32Pixels(Rectangle) | Loads 32-bit ARGB pixels. |
| LoadArgb64Pixels(Rectangle) | Loads 64-bit ARGB pixels. |
| LoadCmyk32Pixels(Rectangle) | Loads pixels in CMYK format. |
| LoadPartialArgb32Pixels(Rectangle, IPartialArgb32PixelLoader) | Loads 32-bit ARGB pixels partially by packs. |
| LoadPartialArgb64Pixels(Rectangle, IPartialArgb64PixelLoader) | Loads 64-bit ARGB pixels partially by packs. |
| LoadPartialPixels(Rectangle, IPartialPixelLoader) | Loads pixels partially by packs. |
| LoadPixels(Rectangle) | Loads pixels. |
| LoadRawData(Rectangle, RawDataSettings, IPartialRawDataLoader) | Loads raw data. |
| LoadRawData(Rectangle, Rectangle, RawDataSettings, IPartialRawDataLoader) | Loads raw data. |
| NormalizeAngle() | Normalizes the angle. This method is applicable to scanned text documents to get rid of the skewed scan. This method uses GetSkewAngle and Rotate methods. |
| virtual NormalizeAngle(bool, Color) | Normalizes the angle. This method is applicable to scanned text documents to get rid of the skewed scan. This method uses GetSkewAngle and Rotate methods. |
| ReadArgb32ScanLine(int) | Reads the whole scan line by the specified scan line index. |
| ReadScanLine(int) | Reads the whole scan line by the specified scan line index. |
| override RemoveMetadata() | Removes this image instance metadata by setting this XmpData value to null. |
| ReplaceColor(Color, byte, Color) | Replaces one color to another with allowed difference and preserves original alpha value to save smooth edges. |
| virtual ReplaceColor(int, byte, int) | Replaces one color to another with allowed difference and preserves original alpha value to save smooth edges. |
| ReplaceNonTransparentColors(Color) | Replaces all non-transparent colors with new color and preserves original alpha value to save smooth edges. Note: if you use it on images without transparency, all colors will be replaced with a single one. |
| virtual ReplaceNonTransparentColors(int) | Replaces all non-transparent colors with new color and preserves original alpha value to save smooth edges. Note: if you use it on images without transparency, all colors will be replaced with a single one. |
| Resize(int, int) | Resizes the image. The default NearestNeighbourResample is used. |
| override Resize(int, int, ImageResizeSettings) | Resizes the image with extended options. |
| virtual Resize(int, int, ResizeType) | Resizes the image. |
| ResizeHeightProportionally(int) | Resizes the height proportionally. The default NearestNeighbourResample is used. |
| virtual ResizeHeightProportionally(int, ImageResizeSettings) | Resizes the height proportionally. |
| virtual ResizeHeightProportionally(int, ResizeType) | Resizes the height proportionally. |
| ResizeWidthProportionally(int) | Resizes the width proportionally. The default NearestNeighbourResample is used. |
| virtual ResizeWidthProportionally(int, ImageResizeSettings) | Resizes the width proportionally. |
| virtual ResizeWidthProportionally(int, ResizeType) | Resizes the width proportionally. |
| override Rotate(float) | Rotate image around the center. |
| virtual Rotate(float, bool, Color) | Rotate image around the center. |
| abstract RotateFlip(RotateFlipType) | Rotates, flips, or rotates and flips the image. |
| Save() | Saves the image data to the underlying stream. |
| Save(Stream) | Saves the object’s data to the specified stream. |
| override Save(string) | Saves the image to the specified file location. |
| Save(Stream, ImageOptionsBase) | Saves the image’s data to the specified stream in the specified file format according to save options. |
| virtual Save(string, bool) | Saves the object’s data to the specified file location. |
| virtual Save(string, ImageOptionsBase) | Saves the object’s data to the specified file location in the specified file format according to save options. |
| override Save(Stream, ImageOptionsBase, Rectangle) | Saves the image’s data to the specified stream in the specified file format according to save options. |
| virtual Save(string, ImageOptionsBase, Rectangle) | Saves the object’s data to the specified file location in the specified file format according to save options. |
| SaveArgb32Pixels(Rectangle, int[]) | Saves the 32-bit ARGB pixels. |
| SaveCmyk32Pixels(Rectangle, int[]) | Saves the pixels. |
| SavePixels(Rectangle, Color[]) | Saves the pixels. |
| SaveRawData(byte[], int, Rectangle, RawDataSettings) | Saves the raw data. |
| SetArgb32Pixel(int, int, int) | Sets an image 32-bit ARGB pixel for the specified position. |
| override SetPalette(IColorPalette, bool) | Sets the image palette. |
| SetPixel(int, int, Color) | Sets an image pixel for the specified position. |
| virtual SetResolution(double, double) | Sets the resolution for this RasterImage. |
| virtual ToBitmap() | Converts raster image to the bitmap. This method is not supported in versions from .Net7.0 and higher |
| WriteArgb32ScanLine(int, int[]) | Writes the whole scan line to the specified scan line index. |
| WriteScanLine(int, Color[]) | Writes the whole scan line to the specified scan line index. |
Examples
This example shows how to Loads Pixel information in an Array of Type Color, manipulates the array and set it back to the image. To perform these operations, this example creates a new Image file (in GIF format) uisng MemoryStream object.
[C#]
//Create an instance of MemoryStream
using (System.IO.MemoryStream stream = new System.IO.MemoryStream())
{
//Create an instance of GifOptions and set its various properties including the Source property
Aspose.Imaging.ImageOptions.GifOptions gifOptions = new Aspose.Imaging.ImageOptions.GifOptions();
gifOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream);
//Create an instance of Image
using (Aspose.Imaging.RasterImage image = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Create(gifOptions, 500, 500))
{
//Get the pixels of image by specifying the area as image boundary
Aspose.Imaging.Color[] pixels = image.LoadPixels(image.Bounds);
//Loop over the Array and sets color of alrenative indexed pixel
for (int index = 0; index < pixels.Length; index++)
{
if (index % 2 == 0)
{
//Set the indexed pixel color to yellow
pixels[index] = Aspose.Imaging.Color.Yellow;
}
else
{
//Set the indexed pixel color to blue
pixels[index] = Aspose.Imaging.Color.Blue;
}
}
//Apply the pixel changes to the image
image.SavePixels(image.Bounds, pixels);
// save all changes.
image.Save();
}
// Write MemoryStream to File
using (System.IO.FileStream fileStream = new System.IO.FileStream(@"C:\temp\output.gif", System.IO.FileMode.Create))
{
stream.WriteTo(fileStream);
}
}
See Also
- class Image
- interface IHasXmpData
- interface IRasterImageArgb32PixelLoader
- namespace Aspose.Imaging
- assembly Aspose.Imaging
