import { NdArray } from 'ndarray';
import { Shape } from './shapes/Shape';
import { ShapeColor } from './shapes/ShapeColor';
import { Options } from './config/Options';
/**
 * Render a raster image to a collection of shapes
 */
export declare class Shapesnap {
    target: NdArray;
    options?: Options | undefined;
    private readonly log;
    private readonly width;
    private readonly height;
    private readonly background;
    private readonly current;
    private readonly buffer;
    private readonly results;
    private score;
    constructor(target: NdArray, options?: Options | undefined);
    get image(): NdArray;
    get shapes(): ShapeColor[];
    get svg(): string;
    get difference(): number;
    step(): Shapesnap;
    autoStep(callback?: (progress: string) => void): Shapesnap;
    addShape(shape: Shape, alpha: number): void;
}