import { IXRReferenceImage } from "@galacean/engine-design";
/**
 *  A reference image is an image to look for in the physical environment.
 */
export declare class XRReferenceImage implements IXRReferenceImage {
    name: string;
    imageSource: ImageBitmapSource;
    physicalWidth: number;
    /**
     * Create a reference image.
     * @param name - The name of the image to be tracked
     * @param imageSource - The image to be tracked
     * @param physicalWidth - The expected physical width measurement for the real-world image being tracked in meters
     */
    constructor(name: string, imageSource: ImageBitmapSource, physicalWidth: number);
}