/**
 * Google Vision OCR Provider
 * Uses Google Cloud Vision API for OCR processing
 */
import { IOCRProvider, OCRResult, OCRConfig } from './ocr-interfaces';
export declare class GoogleVisionProvider implements IOCRProvider {
    readonly name = "google-vision";
    private client;
    private vision;
    constructor(credentials?: string);
    /**
     * Check if Google Vision is available
     */
    isAvailable(): Promise<boolean>;
    /**
     * Extract text from image buffer
     */
    extractText(image: Buffer, config?: OCRConfig): Promise<OCRResult>;
    /**
     * Extract text from image file
     */
    extractTextFromFile(imagePath: string, config?: OCRConfig): Promise<OCRResult>;
    /**
     * Extract text from multiple images
     */
    extractTextFromImages(images: Buffer[], config?: OCRConfig): Promise<OCRResult[]>;
    /**
     * Ensure Google Vision is available
     */
    private ensureAvailable;
    /**
     * Convert Google Vision result to our format
     */
    private convertGoogleVisionResult;
}
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