import type { Point } from './face-scheme-data';
export interface DetectFaceYuNetOptions {
    /** View coordinate width the points must be projected into (the SVG viewBox W). */
    viewWidth: number;
    /** View coordinate height (the SVG viewBox H). */
    viewHeight: number;
    /** ESM bundle URL for `onnxruntime-web`. */
    ortModuleUrl?: string;
    /** Base URL for the ORT wasm fileset. */
    ortWasmBaseUrl?: string;
    /** URL of the YuNet `.onnx` model (defaults to the kit's bundled copy). */
    modelUrl?: string;
    /** Minimum detection score (default 0.6). */
    scoreThreshold?: number;
    /** Lifecycle hook — `'loading'` while the runtime/model initialise, `'detecting'` during inference. */
    onStage?: (stage: 'loading' | 'detecting') => void;
}
/**
 * Detect a single face in `src` and return YuNet's canonical keypoint →
 * photo-point pairs, projected into the view coordinate space using the same
 * `xMidYMid slice` (cover) fit the FaceScheme `<image>` uses. Resolves `null`
 * if no face is found. Browser-only.
 */
export declare function detectFaceYuNet(src: string, options: DetectFaceYuNetOptions): Promise<Array<{
    id: string;
    photo: Point;
}> | null>;
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