/**
 * Convert Base64 string to Uint8Array
 * @param {string} base64 - Base64 encoded string
 * @returns {Uint8Array} - Decoded binary data
 */
export declare function base64ToUint8Array(base64: string): Uint8Array;
/**
 * Convert Uint8Array to Base64 string
 * @param {Uint8Array} uint8Array - Binary data
 * @returns {string} - Base64 encoded string
 */
export declare function uint8ArrayToBase64(uint8Array: Uint8Array): string;
/**
 * Convert Blob to Base64 string (alternative implementation using arrayBuffer)
 * @param {Blob} blob - Blob object to convert
 * @returns {Promise<string>} - Promise that resolves to Base64 encoded string
 */
export declare function blobToBase64(blob: Blob): Promise<string>;
/**
 * Create a blob URL from a Uint8Array for displaying images
 * @param {Uint8Array} uint8Array - Binary image data
 * @param {string} mimeType - MIME type of the image
 * @returns {string} - Blob URL that can be used in img.src
 */
export declare function createImageBlobUrl(uint8Array: Uint8Array, mimeType?: string): string;
/**
 * Create a data URL directly from a Base64 string
 * @param {string} base64 - Base64 encoded image data
 * @param {string} mimeType - MIME type of the image
 * @returns {string} - Data URL that can be used in img.src
 */
export declare function createImageDataUrlFromBase64(base64: string, mimeType?: string): string;
/**
 * Process the UploadReadyData object by converting Base64 strings to Uint8Arrays
 * @param {any} uploadData - The parsed JSON upload data
 * @returns {any} - Processed upload data with typed arrays
 */
export declare function processUploadReadyData(uploadData: any): any;
/**
 * Get mime type based on the first few bytes of a binary file
 * This is a simple implementation that handles common image formats
 * @param {Uint8Array} data - The binary data
 * @returns {string} - The detected MIME type or default 'application/octet-stream'
 */
export declare function detectMimeType(data: Uint8Array): string;
/**
 * Creates an optimal image blob URL based on the image data
 * Detects the MIME type from the data
 * @param {Uint8Array} imageData - The binary image data
 * @returns {string} - A blob URL for the image
 */
export declare function createOptimalImageUrl(imageData: Uint8Array): string;
/**
 * Creates an optimal image blob URL directly from Base64 data
 * @param {string} base64 - Base64 encoded image data
 * @returns {string} - A blob URL for the image
 */
export declare function createOptimalImageUrlFromBase64(base64: string): string;
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