Struct Tolerance 

pub struct Tolerance {
    pub min_score: Option<f64>,
    pub max_outliers: Option<f64>,
    pub channel_delta: u8,
}

Available on crate feature snapshot only.

How closely a frame must match its snapshot.

Every gate this names must pass. A gate left as None is one whose verdict would be meaningless for this snapshot’s content, and leaving it out says so rather than naming a threshold that either never passes or never fails.

The two gates catch different mistakes. The perceptual score notices a change spread thinly over the whole frame, which moves every pixel a little. The outlier allowance notices a change confined to a few pixels, which moves those a lot — the kind a second implementation of the same pipeline produces where it resolves an edge or an occlusion differently, and the kind an average over the frame barely registers.

Fields

min_score: Option<f64>

The perceptual score the frame must reach, on SSIMULACRA2’s 0–100 scale, or None to judge the frame only by its outlier pixels.

max_outliers: Option<f64>

The fraction of pixels that may differ from the baseline by more than channel_delta, or None to judge the frame only by its score.

channel_delta: u8

The per-channel difference, in 0–255 units, within which a pixel counts as matching however far the frame’s score falls.

Trait Implementations

impl Clone for Tolerance

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Tolerance