import type { Mask } from '../Mask.ts';
import type { Point } from '../utils/geometry/points.ts';
/**
 * Return an array with the coordinates of the pixels that are on the
 * external border of the mask using Theo Pavlidis's tracing algorithm.
 * The reference is the top-left corner of the ROI.
 * @param mask - Mask to process.
 * @returns The array of external border pixels.
 */
export declare function getContourPavlidis(mask: Mask): Point[];
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