export interface FaceMeshDetectionPlugin {
    /**
     * Detects face mesh from the supplied image.
     *
     * Only available on Android.
     *
     * @since 5.3.0
     */
    processImage(options: ProcessImageOptions): Promise<ProcessImageResult>;
}
/**
 * @since 5.3.0
 */
export interface ProcessImageOptions {
    /**
     * The local path to the image file.
     *
     * @since 5.3.0
     */
    path: string;
    /**
     * Sets the use case.
     *
     * When `BoundingBoxOnly` is selected, the returned `FaceMesh` only contains bounding box.
     *
     * When `FaceMesh` is selected, the returned `FaceMesh` contains bounding box as well as 468 `FaceMeshPoint` and triangle information.
     * It detects at most 2 faces in this case and it is slower than `BoundingBoxOnly`.
     *
     * @since 5.3.0
     * @default UseCase.FaceMesh
     * @see https://developers.google.com/android/reference/com/google/mlkit/vision/facemesh/FaceMeshDetectorOptions.UseCase
     */
    useCase?: UseCase;
}
/**
 * @since 5.3.0
 */
export interface ProcessImageResult {
    /**
     * The detected face meshs.
     *
     * @since 5.3.0
     */
    faceMeshs: FaceMesh[];
}
/**
 * Defines options for main use case.
 *
 * @since 5.3.0
 * @see https://developers.google.com/android/reference/com/google/mlkit/vision/facemesh/FaceMeshDetectorOptions.UseCase
 */
export declare enum UseCase {
    /**
     * Return bounding box for detected face.
     *
     * @since 5.3.0
     * @see https://developers.google.com/android/reference/com/google/mlkit/vision/facemesh/FaceMeshDetectorOptions#public-static-final-int-bounding_box_only
     */
    BoundingBoxOnly = 0,
    /**
     * Return face mesh info for detected face.
     * It detects at most 2 faces in this use case.
     *
     * @since 5.3.0
     * @see https://developers.google.com/android/reference/com/google/mlkit/vision/facemesh/FaceMeshDetectorOptions#public-static-final-int-face_mesh
     */
    FaceMesh = 1
}
/**
 * Represents a face mesh detected by `FaceMeshDetector`.
 *
 * When `BoundingBoxOnly` is selected, `FaceMesh` only contains valid bounding box.
 *
 * When `FaceMesh` is selected, `FaceMesh` also contains a group of 468 3D face mesh points and related triangle information.
 * Each point is represented by `FaceMeshPoint` describing a specific position in detected face.
 * The triangle information is a group of 3 `FaceMeshPoint`s representing a valid surface on Face (e.g. a valid small surface on nose tip).
 *
 * @since 5.3.0
 * @see https://developers.google.com/android/reference/com/google/mlkit/vision/face/Face
 */
export interface FaceMesh {
    /**
     * Returns the axis-aligned bounding rectangle of the detected face mesh.
     *
     * @since 5.3.0
     */
    bounds: Rect;
    /**
     * Returns contours with a list of `FaceMeshPoint` representing the detected face.
     *
     * @since 5.3.0
     */
    contours?: Contours;
    /**
     * Returns a list of `FaceMeshPoint` representing the whole detected face.
     *
     * @since 5.3.0
     */
    faceMeshPoints?: FaceMeshPoint[];
    /**
     * Returns a list of `Triangle` representing logical triangle surfaces of detected face.
     *
     * Each `Triangle` contains 3 `FaceMeshPoint`, representing 3 points of the triangle surface.
     * The sequence of the 3 points are constant and always counter clockwise in face mesh.
     *
     * @since 5.3.0
     */
    triangles?: Triangle[];
}
/**
 * Rect holds four integer coordinates for a rectangle.
 *
 * @since 5.3.0
 * @see https://developer.android.com/reference/android/graphics/Rect.html
 */
export interface Rect {
    /**
     * The X coordinate of the left side of the rectangle.
     *
     * @since 5.3.0
     */
    left: number;
    /**
     * The Y coordinate of the top of the rectangle.
     *
     * @since 5.3.0
     */
    top: number;
    /**
     * The X coordinate of the right side of the rectangle.
     *
     * @since 5.3.0
     */
    right: number;
    /**
     * The Y coordinate of the bottom of the rectangle.
     *
     * @since 5.3.0
     */
    bottom: number;
}
/**
 * Represents a 3D point in face mesh.
 *
 * The index is an unique ID meaning a fixed position on face, ranging from 0 to 467.
 *
 * In `Point3D`, `x` and `y` are pixel location of detected face in `InputImage`.
 * `z` is also scaled to image size, while the origin will be somewhere in the center of all 468 face mesh points.
 *
 * @since 5.3.0
 * @see https://developers.google.com/android/reference/com/google/mlkit/vision/facemesh/FaceMeshPoint
 */
export interface FaceMeshPoint {
    /**
     * Gets the index of the face mesh point, ranging from 0 to 467.
     * For each specific point, the index is a constant value.
     *
     * @since 5.3.0
     */
    index: number;
    /**
     * Gets a 3D point in face mesh.
     *
     * Inside `Point3D`, `X` and `Y` means a 2D position in original image.
     *
     * More information on the `Z` value:
     * - The unit of measure for the `Z` value is the same as `X` and `Y`.
     * - The smaller the `Z` value, the closer that landmark is to the camera.
     * - The `Z` origin is approximately at the center of all 468 face mesh points.
     *   `Z` value will be negative if the point is close to camera and will be positive if the point is away from the camera.
     *
     * @since 5.3.0
     */
    point: Point3D;
}
/**
 * Represents a 3D point.
 *
 * @since 5.3.0
 */
export interface Point3D {
    /**
     * Returns the X value of the point.
     *
     * @since 5.3.0
     */
    x: number;
    /**
     * Returns the Y value of the point.
     *
     * @since 5.3.0
     */
    y: number;
    /**
     * Returns the Z value of the point.
     *
     * @since 5.3.0
     */
    z: number;
}
/**
 * Represents a triangle with 3 generic points.
 *
 * @since 5.3.0
 */
export interface Triangle {
    /**
     * Returns all points inside the `Triangle`.
     *
     * @since 5.3.0
     */
    points: FaceMeshPoint[];
}
/**
 * Represents contours with their face mesh points.
 *
 * @since 5.3.0
 */
export interface Contours {
    /**
     * Returns all points for the `FaceOval` contour.
     *
     * @since 5.3.0
     */
    faceOval?: FaceMeshPoint[];
    /**
     * Returns all points for the `LeftEyebrowTop` contour.
     *
     * @since 5.3.0
     */
    leftEyebrowTop?: FaceMeshPoint[];
    /**
     * Returns all points for the `LeftEyebrowBottom` contour.
     *
     * @since 5.3.0
     */
    leftEyebrowBottom?: FaceMeshPoint[];
    /**
     * Returns all points for the `RightEyebrowTop` contour.
     *
     * @since 5.3.0
     */
    rightEyebrowTop?: FaceMeshPoint[];
    /**
     * Returns all points for the `RightEyebrowBottom` contour.
     *
     * @since 5.3.0
     */
    rightEyebrowBottom?: FaceMeshPoint[];
    /**
     * Returns all points for the `LeftEye` contour.
     *
     * @since 5.3.0
     */
    leftEye?: FaceMeshPoint[];
    /**
     * Returns all points for the `RightEye` contour.
     *
     * @since 5.3.0
     */
    rightEye?: FaceMeshPoint[];
    /**
     * Returns all points for the `UpperLipTop` contour.
     *
     * @since 5.3.0
     */
    upperLipTop?: FaceMeshPoint[];
    /**
     * Returns all points for the `UpperLipBottom` contour.
     *
     * @since 5.3.0
     */
    upperLipBottom?: FaceMeshPoint[];
    /**
     * Returns all points for the `LowerLipTop` contour.
     *
     * @since 5.3.0
     */
    lowerLipTop?: FaceMeshPoint[];
    /**
     * Returns all points for the `LowerLipBottom` contour.
     *
     * @since 5.3.0
     */
    lowerLipBottom?: FaceMeshPoint[];
    /**
     * Returns all points for the `NoseBridge` contour.
     *
     * @since 5.3.0
     */
    noseBridge?: FaceMeshPoint[];
}