export type AliyunGapCandidate = {
    gapX: number;
    confidence: number;
    scale?: number;
};
export type AliyunOpenCvResult = {
    ok: boolean;
    method?: string;
    backgroundWidth?: number;
    backgroundHeight?: number;
    pieceX?: number;
    pieceWidth?: number;
    candidates?: AliyunGapCandidate[];
    error?: string;
};
export declare function resetAliyunOpenCvAvailabilityForTest(): void;
export declare function detectAliyunGapOpenCv(backgroundPath: string, piecePath: string, maxCandidates?: number, timeoutMs?: number, geometry?: {
    pieceTop: number;
    pieceWidth: number;
    pieceHeight: number;
    renderedBackgroundWidth: number;
    renderedBackgroundHeight: number;
}): Promise<AliyunOpenCvResult>;
export declare function scaleAliyunGapCoordinate(gapX: number, sourceWidth: number, renderedWidth: number): number;
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