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    • SixLabors.ImageSharp
      • Color
      • ColorMatrix
      • Configuration
      • DenseMatrix<T>
      • GeometryUtilities
      • GraphicOptionsDefaultsExtensions
      • GraphicsOptions
      • IConfigurationModule
      • IDeepCloneable
      • IDeepCloneable<T>
      • IImage
      • IImageInfo
      • Image
      • Image<TPixel>
      • ImageExtensions
      • ImageFormatException
      • ImageFrame
      • ImageFrame<TPixel>
      • ImageFrameCollection
      • ImageFrameCollection<TPixel>
      • ImageInfoExtensions
      • ImageProcessingException
      • IndexedImageFrame<TPixel>
      • InvalidImageContentException
      • Matrix3x2Extensions
      • MetadataExtensions
      • Number
      • Point
      • PointF
      • Rational
      • ReadOrigin
      • Rectangle
      • RectangleF
      • SignedRational
      • Size
      • SizeF
      • UnknownImageFormatException
    • SixLabors.ImageSharp.Advanced
      • AdvancedImageExtensions
      • IImageVisitor
      • IImageVisitorAsync
      • IRowIntervalOperation
      • IRowIntervalOperation<TBuffer>
      • IRowOperation
      • IRowOperation<TBuffer>
      • ParallelExecutionSettings
      • ParallelRowIterator
    • SixLabors.ImageSharp.ColorSpaces
      • CieLab
      • CieLch
      • CieLchuv
      • CieLuv
      • CieXyy
      • CieXyz
      • Cmyk
      • Hsl
      • Hsv
      • HunterLab
      • Illuminants
      • LinearRgb
      • Lms
      • Rgb
      • RgbWorkingSpaces
      • YCbCr
    • SixLabors.ImageSharp.ColorSpaces.Companding
      • GammaCompanding
      • LCompanding
      • Rec2020Companding
      • Rec709Companding
      • SRgbCompanding
    • SixLabors.ImageSharp.ColorSpaces.Conversion
      • CieXyChromaticityCoordinates
      • ColorSpaceConverter
      • ColorSpaceConverterOptions
      • GammaWorkingSpace
      • IChromaticAdaptation
      • LmsAdaptationMatrix
      • LWorkingSpace
      • Rec2020WorkingSpace
      • Rec709WorkingSpace
      • RgbPrimariesChromaticityCoordinates
      • RgbWorkingSpace
      • SRgbWorkingSpace
      • VonKriesChromaticAdaptation
    • SixLabors.ImageSharp.Formats
      • IImageDecoder
      • IImageEncoder
      • IImageFormat
      • IImageFormat<TFormatMetadata, TFormatFrameMetadata>
      • IImageFormat<TFormatMetadata>
      • IImageFormatDetector
      • IImageInfoDetector
      • ImageFormatManager
      • PixelTypeInfo
    • SixLabors.ImageSharp.Formats.Bmp
      • BmpBitsPerPixel
      • BmpConfigurationModule
      • BmpDecoder
      • BmpEncoder
      • BmpFileMarkerType
      • BmpFormat
      • BmpImageFormatDetector
      • BmpInfoHeaderType
      • BmpMetadata
      • RleSkippedPixelHandling
    • SixLabors.ImageSharp.Formats.Gif
      • GifColorTableMode
      • GifConfigurationModule
      • GifDecoder
      • GifDisposalMethod
      • GifEncoder
      • GifFormat
      • GifFrameMetadata
      • GifImageFormatDetector
      • GifMetadata
      • IGifExtension
    • SixLabors.ImageSharp.Formats.Jpeg
      • JpegConfigurationModule
      • JpegDecoder
      • JpegEncoder
      • JpegFormat
      • JpegImageFormatDetector
      • JpegMetadata
      • JpegSubsample
    • SixLabors.ImageSharp.Formats.Png
      • PngBitDepth
      • PngChunkFilter
      • PngColorType
      • PngCompressionLevel
      • PngConfigurationModule
      • PngDecoder
      • PngEncoder
      • PngFilterMethod
      • PngFormat
      • PngImageFormatDetector
      • PngInterlaceMode
      • PngMetadata
      • PngTextData
      • PngTransparentColorMode
    • SixLabors.ImageSharp.Formats.Tga
      • TgaBitsPerPixel
      • TgaCompression
      • TgaConfigurationModule
      • TgaDecoder
      • TgaEncoder
      • TgaFormat
      • TgaImageFormatDetector
      • TgaImageType
      • TgaImageTypeExtensions
      • TgaMetadata
    • SixLabors.ImageSharp.Memory
      • AllocationOptions
      • ArrayPoolMemoryAllocator
      • Buffer2D<T>
      • Buffer2DExtensions
      • Buffer2DRegion<T>
      • IManagedByteBuffer
      • IMemoryGroup<T>
      • InvalidMemoryOperationException
      • MemoryAllocator
      • MemoryAllocatorExtensions
      • RowInterval
      • SimpleGcMemoryAllocator
    • SixLabors.ImageSharp.Metadata
      • FrameDecodingMode
      • ImageFrameMetadata
      • ImageMetadata
      • PixelResolutionUnit
    • SixLabors.ImageSharp.Metadata.Profiles.Exif
      • ExifDataType
      • ExifParts
      • ExifProfile
      • ExifTag
      • ExifTag<TValueType>
      • IExifValue
      • IExifValue<TValueType>
    • SixLabors.ImageSharp.Metadata.Profiles.Icc
      • IccColorSpaceType
      • IccDeviceAttribute
      • IccPrimaryPlatformType
      • IccProfile
      • IccProfileClass
      • IccProfileFlag
      • IccProfileHeader
      • IccProfileId
      • IccProfileTag
      • IccRenderingIntent
      • IccTagDataEntry
      • IccTypeSignature
      • IccVersion
      • InvalidIccProfileException
    • SixLabors.ImageSharp.Metadata.Profiles.Iptc
      • IptcProfile
      • IptcTag
      • IptcTagExtensions
      • IptcValue
    • SixLabors.ImageSharp.PixelFormats
      • A8
      • Argb32
      • Bgr24
      • Bgr565
      • Bgra32
      • Bgra4444
      • Bgra5551
      • Byte4
      • HalfSingle
      • HalfVector2
      • HalfVector4
      • IPackedVector<TPacked>
      • IPixel
      • IPixel<TSelf>
      • L16
      • L8
      • La16
      • La32
      • NormalizedByte2
      • NormalizedByte4
      • NormalizedShort2
      • NormalizedShort4
      • PixelAlphaCompositionMode
      • PixelAlphaRepresentation
      • PixelBlender<TPixel>
      • PixelColorBlendingMode
      • PixelConversionModifiers
      • PixelOperations<TPixel>
      • Rg32
      • Rgb24
      • Rgb48
      • Rgba1010102
      • Rgba32
      • Rgba64
      • RgbaVector
      • Short2
      • Short4
    • SixLabors.ImageSharp.Processing
      • AdaptiveThresholdExtensions
      • AffineTransformBuilder
      • AnchorPositionMode
      • AutoOrientExtensions
      • BackgroundColorExtensions
      • BinaryDitherExtensions
      • BinaryThresholdExtensions
      • BinaryThresholdMode
      • BlackWhiteExtensions
      • BokehBlurExtensions
      • BoxBlurExtensions
      • BrightnessExtensions
      • ColorBlindnessExtensions
      • ColorBlindnessMode
      • ContrastExtensions
      • CropExtensions
      • DetectEdgesExtensions
      • DitherExtensions
      • DrawImageExtensions
      • EntropyCropExtensions
      • FilterExtensions
      • FlipExtensions
      • FlipMode
      • GaussianBlurExtensions
      • GaussianSharpenExtensions
      • GlowExtensions
      • GrayscaleExtensions
      • GrayscaleMode
      • HistogramEqualizationExtensions
      • HueExtensions
      • IImageProcessingContext
      • InvertExtensions
      • KnownDitherings
      • KnownEdgeDetectorKernels
      • KnownFilterMatrices
      • KnownQuantizers
      • KnownResamplers
      • KodachromeExtensions
      • LightnessExtensions
      • LomographExtensions
      • OilPaintExtensions
      • OpacityExtensions
      • PadExtensions
      • PixelateExtensions
      • PixelRowDelegateExtensions
      • PixelRowOperation
      • PixelRowOperation<T>
      • PolaroidExtensions
      • ProcessingExtensions
      • ProjectiveTransformBuilder
      • QuantizeExtensions
      • ResizeExtensions
      • ResizeMode
      • ResizeOptions
      • RotateExtensions
      • RotateFlipExtensions
      • RotateMode
      • SaturateExtensions
      • SepiaExtensions
      • SkewExtensions
      • TaperCorner
      • TaperSide
      • TransformExtensions
      • VignetteExtensions
    • SixLabors.ImageSharp.Processing.Extensions.Transforms
      • SwizzleExtensions
    • SixLabors.ImageSharp.Processing.Processors
      • CloningImageProcessor
      • CloningImageProcessor<TPixel>
      • ICloningImageProcessor
      • ICloningImageProcessor<TPixel>
      • IImageProcessor
      • IImageProcessor<TPixel>
      • ImageProcessor<TPixel>
    • SixLabors.ImageSharp.Processing.Processors.Binarization
      • AdaptiveThresholdProcessor
      • BinaryThresholdProcessor
    • SixLabors.ImageSharp.Processing.Processors.Convolution
      • BokehBlurProcessor
      • BoxBlurProcessor
      • EdgeDetector2DKernel
      • EdgeDetector2DProcessor
      • EdgeDetectorCompassKernel
      • EdgeDetectorCompassProcessor
      • EdgeDetectorKernel
      • EdgeDetectorProcessor
      • GaussianBlurProcessor
      • GaussianSharpenProcessor
    • SixLabors.ImageSharp.Processing.Processors.Dithering
      • ErrorDither
      • IDither
      • IPaletteDitherImageProcessor<TPixel>
      • OrderedDither
      • PaletteDitherProcessor
    • SixLabors.ImageSharp.Processing.Processors.Drawing
      • DrawImageProcessor
    • SixLabors.ImageSharp.Processing.Processors.Effects
      • IPixelRowDelegate
      • OilPaintingProcessor
      • PixelateProcessor
    • SixLabors.ImageSharp.Processing.Processors.Filters
      • AchromatomalyProcessor
      • AchromatopsiaProcessor
      • BlackWhiteProcessor
      • BrightnessProcessor
      • ContrastProcessor
      • DeuteranomalyProcessor
      • DeuteranopiaProcessor
      • FilterProcessor
      • GrayscaleBt601Processor
      • GrayscaleBt709Processor
      • HueProcessor
      • InvertProcessor
      • KodachromeProcessor
      • LightnessProcessor
      • LomographProcessor
      • OpacityProcessor
      • PolaroidProcessor
      • ProtanomalyProcessor
      • ProtanopiaProcessor
      • SaturateProcessor
      • SepiaProcessor
      • TritanomalyProcessor
      • TritanopiaProcessor
    • SixLabors.ImageSharp.Processing.Processors.Normalization
      • AdaptiveHistogramEqualizationProcessor
      • AdaptiveHistogramEqualizationSlidingWindowProcessor
      • GlobalHistogramEqualizationProcessor
      • HistogramEqualizationMethod
      • HistogramEqualizationOptions
      • HistogramEqualizationProcessor
    • SixLabors.ImageSharp.Processing.Processors.Overlays
      • BackgroundColorProcessor
      • GlowProcessor
      • VignetteProcessor
    • SixLabors.ImageSharp.Processing.Processors.Quantization
      • DefaultPixelSamplingStrategy
      • ExtensivePixelSamplingStrategy
      • IPixelSamplingStrategy
      • IQuantizer
      • IQuantizer<TPixel>
      • OctreeQuantizer
      • OctreeQuantizer<TPixel>
      • PaletteQuantizer
      • QuantizeProcessor
      • QuantizerConstants
      • QuantizerOptions
      • QuantizerUtilities
      • WebSafePaletteQuantizer
      • WernerPaletteQuantizer
      • WuQuantizer
    • SixLabors.ImageSharp.Processing.Processors.Transforms
      • AffineTransformProcessor
      • AutoOrientProcessor
      • BicubicResampler
      • BoxResampler
      • CropProcessor
      • CubicResampler
      • DegenerateTransformException
      • EntropyCropProcessor
      • FlipProcessor
      • IResampler
      • IResamplingTransformImageProcessor<TPixel>
      • ISwizzler
      • LanczosResampler
      • NearestNeighborResampler
      • ProjectiveTransformProcessor
      • ResizeProcessor
      • RotateProcessor
      • SkewProcessor
      • SwizzleProcessor<TSwizzler>
      • TriangleResampler
      • WelchResampler

    Class DefaultPixelSamplingStrategy

    A pixel sampling strategy that enumerates a limited amount of rows from different frames, if the total number of pixels is over a threshold.

    Inheritance
    Object
    DefaultPixelSamplingStrategy
    Implements
    IPixelSamplingStrategy
    Inherited Members
    Object.Equals(Object)
    Object.Equals(Object, Object)
    Object.GetHashCode()
    Object.GetType()
    Object.MemberwiseClone()
    Object.ReferenceEquals(Object, Object)
    Object.ToString()
    Namespace: SixLabors.ImageSharp.Processing.Processors.Quantization
    Assembly: SixLabors.ImageSharp.dll
    Syntax
    public class DefaultPixelSamplingStrategy : IPixelSamplingStrategy

    Constructors

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    DefaultPixelSamplingStrategy()

    Initializes a new instance of the DefaultPixelSamplingStrategy class.

    Declaration
    public DefaultPixelSamplingStrategy()
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    DefaultPixelSamplingStrategy(Int32, Double)

    Initializes a new instance of the DefaultPixelSamplingStrategy class.

    Declaration
    public DefaultPixelSamplingStrategy(int maximumPixels, double minimumScanRatio)
    Parameters
    Type Name Description
    Int32 maximumPixels

    The maximum number of pixels to process.

    Double minimumScanRatio

    always scan at least this portion of total pixels within the image.

    Properties

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    MaximumPixels

    Gets the maximum number of pixels to process. (The threshold.)

    Declaration
    public long MaximumPixels { get; }
    Property Value
    Type Description
    Int64
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    MinimumScanRatio

    Gets a value indicating: always scan at least this portion of total pixels within the image. The default is 0.1 (10%).

    Declaration
    public double MinimumScanRatio { get; }
    Property Value
    Type Description
    Double

    Methods

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    EnumeratePixelRegions<TPixel>(Image<TPixel>)

    Enumerates pixel regions within the image as Buffer2DRegion<T>.

    Declaration
    public IEnumerable<Buffer2DRegion<TPixel>> EnumeratePixelRegions<TPixel>(Image<TPixel> image)
        where TPixel : struct, IPixel<TPixel>
    Parameters
    Type Name Description
    Image<TPixel> image

    The image.

    Returns
    Type Description
    IEnumerable<Buffer2DRegion<TPixel>>

    An enumeration of pixel regions.

    Type Parameters
    Name Description
    TPixel

    The pixel type.

    Implements

    IPixelSamplingStrategy
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