import type { Point } from './face-scheme-data';
export interface DetectFaceLandmarksOptions {
    /** 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 `@mediapipe/tasks-vision`. */
    visionModuleUrl?: string;
    /** Base URL for the MediaPipe wasm fileset. */
    wasmBaseUrl?: string;
    /** URL of the `face_landmarker.task` model. */
    modelAssetPath?: string;
    /** Lifecycle hook — `'loading'` while the model initialises, `'detecting'` during inference. */
    onStage?: (stage: 'loading' | 'detecting') => void;
}
/**
 * Detect a single face in `src` and return the FaceScheme canonical-anchor →
 * 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 detectFaceLandmarks(src: string, options: DetectFaceLandmarksOptions): Promise<Array<{
    id: string;
    photo: Point;
}> | null>;
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