export declare function isEmptyValues(value: any): boolean;
export declare function getUTF8CharLength(str: string): number;
export declare function getLocation(watermark: any, params: Array<any>): {
    northwest: any;
    north: any;
    northeast: any;
    west: any;
    center: any;
    east: any;
    southwest: any;
    south: any;
    southeast: any;
};
export declare function getBase64(IMG: HTMLImageElement, defaultImgSize: any, spc: any): string;
/**
 * 数据万象给的公式计算
 * ethanfzhang@tencent.com
 * https://cloud.tencent.com/document/product/460/6951
 */
export declare function createTextCanvas(textMsg: string, textFontSize: number, degree: number, alpha: any, fillStyle: string, font: string): HTMLCanvasElement;
