/**
 * Low-level binary reader for PDS3 image data.
 * Supports 8-bit and 16-bit sample reads with configurable byte order
 * determined by the `SAMPLE_TYPE` keyword in the LBL label.
 */
export declare class BinaryReader {
    private readonly view;
    private readonly littleEndian;
    private readonly signed;
    /**
     * @param buffer - Raw image buffer.
     * @param sampleType - Value of the PDS3 `SAMPLE_TYPE` keyword
     *   (e.g. `'MSB_INTEGER'`, `'LSB_INTEGER'`).
     */
    constructor(buffer: ArrayBuffer, sampleType: string);
    /**
     * Reads an unsigned integer sample at the given byte offset.
     *
     * @param offset - Byte offset within the buffer.
     * @param bits - Sample bit-depth (8 or 16).
     * @returns Raw (unscaled) sample value.
     * @throws If `bits` is not 8 or 16.
     */
    read(offset: number, bits: number): number;
}