import type { ImageData } from 'canvas';
import type { QrCodeLib } from '../../interfaces/QrCodeLib.mjs';
/**
 * Gets the ImageData from an image, for Node.js environments.
 * This ImageData is then further processed to get QR codes.
 * @param inputImage - The image to get the ImageData from.
 * @returns A promise that resolves to the ImageData.
 */
export declare const getImageDataFromInput: (inputImage: string | File | Uint8Array) => Promise<ImageData>;
/**
 * Node.js implementation of QR code library wrapper
 */
export declare class NodeQrCodeLib implements QrCodeLib {
    private qrCodeModule;
    /**
     * Gets the QR code module, loading it if necessary
     * @returns Promise that resolves to the QR code module
     */
    private getQrCodeModule;
    /**
     * @inheritdoc
     */
    toDataURL(text: string): Promise<string>;
    /**
     * @inheritdoc
     */
    getImageDataFromInput(imageInput: string | File | Uint8Array): Promise<ImageData>;
}