import { PreprocessingOptions } from '../types';
/**
 * Enhances image quality for better OCR results
 */
export declare class ImageEnhancer {
    /**
     * Preprocess image for OCR
     * @param imagePath Path to image file or Buffer (or URI in React Native)
     * @param options Preprocessing options
     * @returns Processed image buffer (or original input in React Native)
     */
    enhance(imagePath: string | Buffer, options?: PreprocessingOptions): Promise<Buffer | string | any>;
    /**
     * Auto-rotate image based on EXIF orientation
     */
    autoRotate(imagePath: string | Buffer): Promise<Buffer | string | any>;
    /**
     * Detect and correct perspective distortion
     * Note: Basic implementation - advanced perspective correction would require
     * additional libraries or native processing
     */
    correctPerspective(imagePath: string | Buffer): Promise<Buffer | string | any>;
}
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