/**
 * Implementation of Viola-Jones classifier
 *
 * Copyright (C) 2014 Ivar Clemens
 */
import { StageInterface } from './Cascade';
import { HaarClassifier } from './HaarClassifier';
import { IntegralImage } from './IntegralImage';
export declare class HaarStage {
    private _stageIdx;
    private _classifier;
    private _integralImage;
    private _scale;
    private _thresholds;
    private _rects;
    private _cache;
    private _caches;
    integralImage: IntegralImage;
    scale: number;
    constructor(classifier: HaarClassifier, stage: StageInterface, stageIdx: number);
    /**
     * Updates the scaled rectangle cache. It contains the coordinates of all
     * rectangles at the proper scale.
     */
    updateCache(): void;
    classify(ii: (Float32Array | Float64Array), offset: number, stdev: number, invArea: number): boolean;
}