import type { FrameDifference, DifferenceOptions } from './types';
export declare class FrameDifferenceCalculator {
    calculateDifference(frame1: HTMLCanvasElement, frame2: HTMLCanvasElement, timestamp1: number, timestamp2: number, options?: DifferenceOptions): FrameDifference;
    private validateFrames;
    private prepareFramesForComparison;
    private extractFrameData;
    private convertToGrayscale;
    private calculatePixelDifference;
    private calculateHistogramDifference;
    private buildHistogram;
    private compareHistograms;
    private correlateHistogramChannel;
    areFramesIdentical(frame1: HTMLCanvasElement, frame2: HTMLCanvasElement): boolean;
}
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