/**
 * Validation utilities for PDF processing
 */
export declare class ValidationUtils {
    /**
     * Validates file path exists and is readable
     */
    static validateFilePath(filePath: string): void;
    /**
     * Validates page number
     */
    static validatePageNumber(pageNumber: number, totalPages: number): void;
    /**
     * Validates render options
     */
    static validateRenderOptions(options: {
        width?: number;
        quality?: number;
    }): void;
    /**
     * Validates object ID
     */
    static validateObjectId(objectId: string): void;
    /**
     * Validates bounding box
     */
    static validateBoundingBox(bbox: any): boolean;
    /**
     * Safely gets numeric value with fallback
     */
    static safeNumber(value: any, fallback?: number): number;
    /**
     * Safely gets string value with fallback
     */
    static safeString(value: any, fallback?: string): string;
}
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