import type { DoubleMatrix } from 'cheminfo-types';
import { matrixPQN } from 'ml-spectra-processing';
export interface PQNFilter {
    name: 'pqn';
    options?: PQNOptions;
}
export type PQNOptions = Omit<Exclude<Parameters<typeof matrixPQN>[1], undefined>, 'output'>;
export declare function pqn(matrix: DoubleMatrix, options?: PQNOptions): {
    data: {
        data: number[][];
        medianOfQuotients: number[];
    };
};
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