/**
 * Aspect ratio detection from Sanity field names.
 *
 * Maps common field naming conventions (e.g. heroImage, ogImage) to the
 * closest valid Lamina API aspect ratio value so generated assets match
 * the intended placement without manual editor intervention.
 */
/** Valid aspect ratio values accepted by the Lamina content.create() API. */
export type LaminaAspectRatio = '1:1' | '16:9' | '9:16' | '4:3' | '4:5' | 'auto';
export declare const ASPECT_RATIO_OPTIONS: readonly {
    value: LaminaAspectRatio | '';
    label: string;
}[];
export interface DetectedAspectRatio {
    ratio: LaminaAspectRatio;
    /** Human-readable explanation, e.g. "16:9 (hero image)" */
    label: string;
}
/**
 * Detect the best aspect ratio for a given field name.
 *
 * @returns The detected ratio and a human-readable label, or `null` when
 *          the field name is unknown or not provided.
 */
export declare function detectAspectRatio(fieldName?: string): DetectedAspectRatio | null;