import { FrameExtractor } from '../../core/FrameExtractor';
import { FrameScorer } from './FrameScorer';
import { MemoryManager } from '../../utils/MemoryManager';
import type { ThumbnailOptions, Thumbnail, ProgressCallback } from '../../types';
export declare class ThumbnailGenerator {
    private frameExtractor;
    private frameScorer;
    private memoryManager;
    constructor(frameExtractor?: FrameExtractor, frameScorer?: FrameScorer, memoryManager?: MemoryManager);
    generate(video: HTMLVideoElement, options?: ThumbnailOptions & {
        onProgress?: ProgressCallback;
    }): Promise<Thumbnail[]>;
    private validateVideo;
    private validateAndNormalizeOptions;
    private calculateExtractionStrategy;
    private extractCandidateFrames;
    private scoreAndFilterFrames;
    private applyDiversityFilter;
    private generateThumbnails;
    private resizeCanvas;
}
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