import type { MeasurementXY, OneLowerCase } from 'cheminfo-types';
import type { Shape1D } from 'ml-peak-shape-generator';
export interface PeakPickingOptions {
    /** x variable label, by default 'x' */
    xVariable?: OneLowerCase;
    /** y variable label, by default 'y' */
    yVariable?: OneLowerCase;
    /** should we look for the closest min / max, default true */
    optimize?: boolean;
    /** options of the peak shape fit */
    shape?: Shape1D;
    /** are we looking for maxima or minima, default true */
    max?: boolean;
}
/**
 * Based on a x value we will return a peak
 * if you set optimize=True the returned positions will be
 * the closest actual datapoints to the fitted peak location.
 * the x/y of the fitted peak will be in xOptimized and yOptimized
 * @param spectrum
 * @param target
 * @param options
 */
export declare function peakPicking(spectrum: MeasurementXY, 
/** value to search (on x axis) */
target: number, options?: PeakPickingOptions): {
    [key: string]: number;
    optimized?: any;
} | undefined;
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