export type VisualThreshold = {
    maxDiffPixels?: number | undefined;
    maxDiffPixelRatio?: number | undefined;
};
export type ThresholdEvaluationInput = {
    diffPixels: number;
    totalPixels: number;
    threshold?: VisualThreshold;
};
export type ThresholdEvaluation = {
    passed: boolean;
    diffRatio: number;
    reason?: 'maxDiffPixels' | 'maxDiffPixelRatio';
};
export declare function evaluateVisualThreshold(input: ThresholdEvaluationInput): ThresholdEvaluation;