Function evaluate_single 

pub fn evaluate_single(
    reference: &ImgVec<RGB8>,
    encoded: &ImgVec<RGB8>,
    config: &MetricConfig,
) -> Result<MetricResult>

Evaluate a single encoded image against a reference.

This is a convenience wrapper around the individual metric calculation functions. It’s designed for simple use cases where you want to quickly evaluate the quality of an encoded image without setting up a full EvalSession.

Arguments

• reference - Reference image (original)
• encoded - Encoded/decoded image to compare
• config - Which metrics to calculate

Returns

MetricResult containing the calculated metric values.

Errors

Returns an error if:

• Images have different dimensions
• Images are too small for the metric (minimum 8x8 for butteraugli)
• Metric calculation fails

Example

use codec_eval::eval::helpers::evaluate_single;
use codec_eval::metrics::MetricConfig;

let config = MetricConfig::perceptual();
let result = evaluate_single(&reference, &encoded, &config)?;

if let Some(dssim) = result.dssim {
    println!("DSSIM: {:.6}", dssim);
}