import { GenericImageFilter } from "./GenericImageFilter";
export declare class BlackwhiteFilter extends GenericImageFilter {
    threshold: number;
    otsuEnabled: boolean;
    adaptive: boolean;
    blockSize: number;
    C: number;
    constructor(cvs: HTMLCanvasElement, threshold: number, otsuEnabled: boolean, adaptive: boolean, blockSize: number, C: number);
    process(img: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement): number;
    adaptiveThresholdWithIntegralImage(imageData: ImageData): ImageData;
    computeIntegralImage(data: Uint8ClampedArray, width: number, height: number): Uint32Array;
    getAreaSum(integral: Uint32Array, width: number, x1: number, y1: number, x2: number, y2: number): number;
    globalThresholding(imageData: ImageData): any;
    grayscale(r: number, g: number, b: number): number;
    setAdaptive(adaptive: boolean, blockSize: number, C: number): void;
    setThreshold(threshold: number): void;
    setOTSUEnabled(enabled: boolean): void;
}