export declare function applyAttention(attention: Region, image: Size, target: Size, ruleOfThirds?: boolean): Region;
export declare function fill(source: Size, target: Size): number;
export declare function fit(source: Size, target: Size): number;
export declare function coerceAngle(value: number): number;
export declare function convertDegreeToRadian(rotate: number): number;
export declare function getMidPoint(evt: TouchEvent): {
    x: number;
    y: number;
};
export declare function getDistance(evt: TouchEvent): number;
export interface Region {
    x: number;
    y: number;
    width: number;
    height: number;
}
interface Size {
    width: number;
    height: number;
}
export {};