/**
 * Runtime validation schema and wrapper for tesseract.js OCR adapter options.
 *
 * @module @nhtio/adk/batteries/specialists/ocr/tesseract_js/validation
 *
 * @remarks
 * Validates `TesseractJsOcrAdapterOptions` at construction time. Throws
 * `E_INVALID_TESSERACT_JS_OCR_OPTIONS` on failure. `languages` is required and must be a non-empty
 * array of strings — language packs download on first use, so a missing/empty value fails loud
 * rather than silently picking a default; unknown top-level keys are rejected so typos fail loud.
 */
import type { TesseractJsOcrAdapterOptions } from "./types";
/** Validator schema for `TesseractJsOcrAdapterOptions`. Rejects unknown top-level keys. */
export declare const tesseractJsOcrOptionsSchema: import("@nhtio/validation").ObjectSchema<TesseractJsOcrAdapterOptions>;
/**
 * Validates an arbitrary input against `tesseractJsOcrOptionsSchema`.
 *
 * @param input - The raw options object to validate.
 * @returns The resolved options object with defaults filled in.
 * @throws {@link @nhtio/adk/batteries!E_INVALID_TESSERACT_JS_OCR_OPTIONS} when invalid.
 */
export declare const validateOptions: (input: unknown) => TesseractJsOcrAdapterOptions;