Class SKPixelComparisonResult

Namespace: SkiaSharp.Extended

Assembly: SkiaSharp.Extended.dll

Holds the results of a pixel-by-pixel image comparison.

public class SKPixelComparisonResult

Inheritance: object

SKPixelComparisonResult

Inherited Members: object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Constructors

SKPixelComparisonResult(int, int, int): Initializes a new instance of SKPixelComparisonResult.

SKPixelComparisonResult(int, int, int, long): Initializes a new instance of SKPixelComparisonResult.

SKPixelComparisonResult(int, int, int, long, int): Initializes a new instance of SKPixelComparisonResult.

Properties

AbsoluteError: Gets the sum of per-channel absolute differences across all pixels.

ChannelCount: Gets the number of channels compared (3 for RGB, 4 for RGBA).

ErrorPixelCount: Gets the number of pixels that differ between the two images.

ErrorPixelPercentage: Gets the ratio of differing pixels to total pixels (0.0 to 1.0). Returns 0 if TotalPixels is 0.

MeanAbsoluteError: Gets the mean absolute error per channel, computed as AbsoluteError / (TotalPixels × ChannelCount). Range: 0 (identical) to 255 (maximum difference). Returns 0 if TotalPixels is 0.

MeanSquaredError: Gets the mean squared error per channel, computed as SumSquaredError / (TotalPixels × ChannelCount). Range: 0 (identical) to 65025 (maximum difference). Returns 0 if TotalPixels is 0.

NormalizedRootMeanSquaredError: Gets the normalized root mean squared error, computed as RootMeanSquaredError / 255. Range: 0 (identical) to 1 (maximum difference). Useful for threshold-based pass/fail testing.

PeakSignalToNoiseRatio: Gets the peak signal-to-noise ratio in decibels, computed as 10 × log₁₀(255² / MeanSquaredError). Returns PositiveInfinity for identical images.

RootMeanSquaredError: Gets the root mean squared error, computed as the square root of MeanSquaredError. Range: 0 (identical) to 255 (maximum difference).

SumSquaredError: Gets the sum of per-channel squared differences across all pixels.

TotalPixels: Gets the total number of pixels compared.

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