import { PdfFilter } from './types.js';
/**
 * Creates an LZW filter for encoding and decoding PDF stream data.
 * LZW (Lempel-Ziv-Welch) is a lossless compression algorithm.
 * This is a minimal implementation for PDF (12-bit, no early change, no predictor).
 *
 * @returns A PdfFilter object with encode and decode methods.
 *
 * @example
 * ```typescript
 * const filter = lzw()
 * const compressed = filter.encode(rawData)
 * const decompressed = filter.decode(compressed)
 * ```
 */
export declare function lzw(): PdfFilter;