declare const IMAGE_MIME_TYPES: Set<string>;
declare function normalizeMimeType(mimeType: string): string;
declare function isImageMimeType(mimeType: string): boolean;
declare function parseThumbnailWidth(raw: string | null | undefined, options?: {
    defaultWidth?: number;
    minWidth?: number;
    maxWidth?: number;
}): number;
declare function resizeImageContents(contents: Uint8Array, width: number, mimeType: string): Promise<{
    body: Uint8Array;
    contentType: string;
}>;
export { IMAGE_MIME_TYPES, isImageMimeType, normalizeMimeType, parseThumbnailWidth, resizeImageContents, };