import { Corners, Point, Rect } from '../types';
import { VisitedPoints } from '../utils/VisitedPoints';
export declare type Edge = Int32Array;
export interface Shape {
    bounds: Rect;
    edges: {
        top: Edge;
        right: Edge;
        bottom: Edge;
        left: Edge;
    };
}
/**
 * Finds a shape in a binarized image by looking for adjacent pixels of a
 * specific color starting at a given point.
 */
export declare function findShape(imageData: ImageData, startingPoint: Point, visitedPoints?: VisitedPoints, { color }?: {
    color?: number | undefined;
}): Shape;
export interface ParseRectangleResult {
    isRectangle: boolean;
    angles: [number, number, number, number];
}
/**
 * Determines whether the given corners make for a roughly rectangular shape.
 * The amount of allowed error can be controlled.
 *
 * @param corners the corners to check
 * @param param1.allowedErrorAngle the angle in radians to allow in error
 */
export declare function parseRectangle(corners: Corners, { allowedErrorAngle }?: {
    allowedErrorAngle?: number | undefined;
}): ParseRectangleResult;