Struct ChannelDifference

Namespace

Egami.Analysis

Assembly

Egami.dll

How much one channel of two images differs, on the 0 to 1 scale of the channel values, so 8-bit and 16-bit results line up.

public readonly record struct ChannelDifference : IEquatable<ChannelDifference>

Implements

IEquatable<ChannelDifference>

Inherited Members

ValueType.Equals(object)

ValueType.GetHashCode()

ValueType.ToString()

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Examples

// Every cheap metric in one pass, per channel and overall, on the 0 to 1 scale; SSIM on request.
CompareResult result = Raster.Compare(expected, actual, new CompareOptions { Ssim = true, Fuzz = 0.02f });
Console.WriteLine($"PSNR {result.Overall.Psnr:F1} dB, SSIM {result.Overall.Ssim:F4}, {result.DifferentPixels} pixels off by more than 2%");
bool sameLook = result.Overall.Psnr >= 40;

Properties

Dssim

Gets the structural dissimilarity, (1 − Ssim) / 2, or NaN when SSIM was not computed.

public double Dssim { get; }

Property Value

double

Mae

Gets the mean absolute error: the average of |a − b|.

public double Mae { get; }

Property Value

double

Mse

Gets the mean squared error: the average of (a − b)².

public double Mse { get; }

Property Value

double

PeakError

Gets the largest |a − b| of any pixel (ImageMagick's PAE).

public double PeakError { get; }

Property Value

double

Psnr

Gets the peak signal-to-noise ratio in decibels, 10·log₁₀(1 / Mse), or +∞ when the channels are equal.

public double Psnr { get; }

Property Value

double

Rmse

Gets the root mean squared error, √Mse.

public double Rmse { get; }

Property Value

double

Ssim

Gets the structural similarity (Wang et al. 2004), 1 for equal channels, or NaN unless Ssim was set.

public double Ssim { get; }

Property Value

double