/**
 * Utility for reading local image files and converting to base64 data URIs.
 * Used by image-to-3d, multi-image-to-3d, and image-to-image tools
 * so agents don't need to pass huge base64 strings through MCP arguments.
 */
/**
 * Read a local image file and return a base64 data URI.
 * Throws descriptive errors for missing files, unsupported formats, or oversized files.
 */
export declare function fileToDataUri(filePath: string): Promise<string>;
/**
 * Resolve an image source: if file_path is provided, convert to data URI;
 * otherwise return image_url as-is.
 */
export declare function resolveImageSource(image_url?: string, file_path?: string): Promise<string>;