import { EdgeArea, EdgePoint } from "./ImageTracer";
import { EdgeRaster, EdgeTypeId } from "./EdgeRasterBuilder";
export type BoundingBox = [number, number, number, number];
export declare class AreaScanner {
    /**
     * 3. Walking through an edge node array, discarding edge node types 0 and 15 and creating paths from the rest.
     *  Walk directions: 0 > ; 1 ^ ; 2 < ; 3 v
     * @param edgeRaster
     * @returns
     */
    scan(edgeRaster: EdgeRaster, pathMinLength: number): EdgeArea[];
    protected addPointToArea(area: EdgeArea, x: number, y: number, edgeType: EdgeTypeId): number;
    protected findParentId(path: EdgeArea, paths: EdgeArea[], maxPath: number, w: number, h: number): number;
    protected boundingBoxIncludes(parentbbox: BoundingBox, childbbox: BoundingBox): boolean;
    protected pointInPolygon(point: EdgePoint, path: EdgePoint[]): boolean;
}
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