import { AccessibilityNode, Bounds } from "../parsers/ui-dump.js";
export declare const MIN_ICON_SIZE = 16;
export declare const MAX_ICON_SIZE = 200;
export declare const MIN_ASPECT_RATIO = 0.5;
export declare const MAX_ASPECT_RATIO = 2;
export declare const MAX_CANDIDATES = 6;
/**
 * Check if dimensions are within icon size constraints.
 */
export declare function isIconSized(width: number, height: number): boolean;
/**
 * Filter accessibility nodes to find unlabeled clickable elements that are icon-sized.
 * Returns max 6 candidates sorted by position (top-to-bottom, left-to-right).
 */
export declare function filterIconCandidates(nodes: AccessibilityNode[]): AccessibilityNode[];
/**
 * Format candidate bounds as string "[x0,y0][x1,y1]"
 */
export declare function formatBounds(node: AccessibilityNode): string;
/**
 * Crop a region from an image and return as base64 JPEG.
 * Scales down to max 128x128 if larger.
 */
export declare function cropCandidateImage(imagePath: string, bounds: Bounds): Promise<string>;