import type { PdfReaderOptions } from "./pdf.interface.js";
/**
 * A collection of constant values used for PDF processing thresholds.
 */
export declare const CONSTANT: {
    /** Minimum number of words per page to consider a page as containing text. */
    WORDS_PER_PAGE_THRESHOLD: number;
    /** Minimum text length per page to consider it as containing content. */
    TEXT_LENGTH_THRESHOLD: number;
    /** Height percentage from the top of the page used to detect headers. */
    HEADER_FROM_HEIGHT_PERCENTAGE: number;
    /** Height percentage from the bottom of the page used to detect footers. */
    FOOTER_FROM_HEIGHT_PERCENTAGE: number;
};
/**
 * Default options for configuring the PDF reader.
 */
export declare const PDF_READER_DEFAULT_OPTIONS: PdfReaderOptions;