Struct MetricConfig 

pub struct MetricConfig {
    pub dssim: bool,
    pub ssimulacra2: bool,
    pub butteraugli: bool,
    pub psnr: bool,
    pub xyb_roundtrip: bool,
}

Configuration for which metrics to calculate.

Fields

dssim: bool

Calculate DSSIM (structural dissimilarity).

ssimulacra2: bool

Calculate SSIMULACRA2 (perceptual similarity, higher is better).

butteraugli: bool

Calculate Butteraugli (perceptual difference, lower is better).

psnr: bool

Calculate PSNR (peak signal-to-noise ratio). NOT RECOMMENDED.

xyb_roundtrip: bool

Roundtrip reference through XYB color space before comparing.

When enabled, the reference image is converted RGB → XYB → u8 → XYB → RGB before computing metrics. This isolates true compression error from color space conversion error.

Recommended for codecs that operate in XYB color space (e.g., jpegli).

Implementations

impl MetricConfig

pub fn all() -> Self

Calculate all available metrics.

pub fn fast() -> Self

Fast metric set (PSNR only). NOT RECOMMENDED for quality comparison.

pub fn perceptual() -> Self

Perceptual metrics only (DSSIM, SSIMULACRA2, Butteraugli). RECOMMENDED.

pub fn perceptual_xyb() -> Self

Perceptual metrics with XYB roundtrip. RECOMMENDED for XYB codecs.

Same as perceptual() but with XYB roundtrip enabled. This gives fairer comparisons for codecs that operate in XYB color space (like jpegli) by isolating compression error from color space conversion error.

pub fn ssimulacra2_only() -> Self

SSIMULACRA2 only - good balance of speed and accuracy.

pub fn with_xyb_roundtrip(self) -> Self

Enable XYB roundtrip on this config.

Trait Implementations

impl Clone for MetricConfig

fn clone(&self) -> MetricConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MetricConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MetricConfig

fn default() -> MetricConfig

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MetricConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MetricConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.