import type { QrScannerFormat } from './types';
export declare function prepareDecoder(wasmUrl?: string, signal?: AbortSignal): Promise<void>;
export declare function decode(image: ImageData, formats: QrScannerFormat[], wasmUrl?: string, signal?: AbortSignal): Promise<import("zxing-wasm/reader").ReadResult | undefined>;
export declare function loadImage(file: File, signal?: AbortSignal): Promise<HTMLImageElement>;
export declare function captureImage(source: HTMLVideoElement | HTMLImageElement, canvas: HTMLCanvasElement, maxSize?: number, region?: {
    x: number;
    y: number;
    width: number;
    height: number;
}): ImageData | undefined;