import type { SignImage, SignImageSourceLocal, SignImageSourceRemote } from './data-definitions/TrafficSignDataTypes.js';
export declare const isSignImageMissing: (image: SignImage | undefined) => image is "missing";
export declare const normalizeSignImage: (image: SignImage) => SignImage;
export declare const isSignImageSource: (image: SignImage) => image is SignImageSourceRemote | SignImageSourceLocal;
//# sourceMappingURL=signImage.d.ts.map