import * as tf from '@tensorflow/tfjs';
/**
 * This duplicates the behavior of `keras_retinanet.utils.anchors.AnchorParameters`
 */
export interface AnchorParameters {
    ratios: number[];
    sizes: number[];
    strides: number[];
    scales: number[];
}
/**
 * This duplicates the behavior of `keras_retinanet.utils.anchors.AnchorParameters.default`
 */
export declare const defaultAnchorParameters: AnchorParameters;
/**
 * This duplicates the behavior of `keras_retinanet.utils.anchors.shift`
 * @hidden
 */
export declare function shift(shape: number[], stride: number, anchors: tf.Tensor2D): tf.Tensor2D;
/**
 * This duplicates the behavior of `keras_retinanet.utils.anchors.generate_anchors`
 * @hidden
 */
export declare function generateAnchors(baseSize: number, anchorParams?: AnchorParameters): tf.Tensor2D;
/**
 * This duplicates the behavior of `keras_retinanet.utils.anchors.anchors_for_shape`
 * @hidden
 */
export declare function anchorsForShape(inputShape: number[], anchorParams?: AnchorParameters): tf.Tensor<tf.Rank.R2>;