declare global {
    interface Window {
        cv: any;
    }
}
/**
 * OpenCV.js builds to try, in order. Both are single-file builds with the WASM embedded,
 * so no companion `.wasm` request is needed.
 *
 * Note: opencv.org only publishes rolling branch builds — pinned version paths such as
 * `/4.10.0/opencv.js` were removed upstream and now return 404. `5.x` is the current
 * development line and `4.x` the stable line; the 4.x entry is a fallback for the case
 * where the 5.x build is temporarily broken or unavailable.
 */
export declare const DEFAULT_OPENCV_URLS: string[];
/**
 * Overrides which OpenCV.js build(s) to load — e.g. to self-host instead of using the CDN.
 * Must be called before anything triggers a load; ignored once loading has started.
 */
export declare function configureOpenCV(urls: string | string[]): void;
/**
 * Lazily loads OpenCV.js, trying each configured build in order.
 * Rejects only when every candidate fails. Callers read `window.cv`.
 *
 * IMPORTANT: this promise must never resolve *with* the OpenCV module. Emscripten's
 * module object has its own `.then` method, so it is thenable — resolving a promise
 * with it makes the promise machinery try to adopt it and call `.then` forever, which
 * wedges the whole tab in an infinite microtask loop. Always resolve with `undefined`
 * and let callers read `window.cv`.
 */
export declare function loadOpenCV(): Promise<void>;
interface UseOpenCVResult {
    cv: any | null;
    ready: boolean;
    error: Error | null;
}
/** Lazily loads OpenCV.js from CDN. Starts loading only when `enabled` is true. */
export declare function useOpenCV(enabled?: boolean): UseOpenCVResult;
export {};