import { Vector3 } from "@babylonjs/core";
export declare const VISIBILITY_THRESHOLD: number;
export interface FilterParams {
    R?: number;
    Q?: number;
    oneEuroCutoff?: number;
    oneEuroBeta?: number;
    type: string;
    gaussianSigma?: number;
}
export declare const gaussianKernel1d: (size: number, sigma: number) => any[];
export declare class OneEuroVectorFilter {
    t_prev: number;
    x_prev: Vector3;
    private dx_prev;
    min_cutoff: number;
    beta: number;
    d_cutoff: number;
    constructor(t_prev: number, x_prev: Vector3, dx_prev?: Vector3, min_cutoff?: number, beta?: number, d_cutoff?: number);
    private static smoothing_factor;
    private static exponential_smoothing;
    next(t: number, x: Vector3): Vector3;
}
export declare class KalmanVectorFilter {
    R: number;
    Q: number;
    private readonly kalmanFilterX;
    private readonly kalmanFilterY;
    private readonly kalmanFilterZ;
    constructor(R?: number, Q?: number);
    next(t: number, vec: Vector3): Vector3;
}
export declare class GaussianVectorFilter {
    readonly size: number;
    private readonly sigma;
    private _values;
    get values(): Vector3[];
    private readonly kernel;
    constructor(size: number, sigma: number);
    push(v: Vector3): void;
    reset(): void;
    apply(): Vector3;
}
export declare class EuclideanHighPassFilter {
    private readonly threshold;
    private _value;
    get value(): Vector3;
    constructor(threshold: number);
    update(v: Vector3): void;
    reset(): void;
}