export declare function dataUriToBlobSync(dataUri: string): Blob;
export declare function urlToBlobAsync(url: string, abortSignal?: AbortSignal): Promise<Blob>;
export declare function blobToCanvas(blob: Blob, orientation?: number): Promise<HTMLCanvasElement>;
export declare function canvasToBlob(canvas: HTMLCanvasElement): Promise<Blob>;
export declare function getBlobOrientation(blob: Blob): Promise<number | undefined>;