face-api/src/common/extractFCParamsFactory.ts

import * as tf from '../../dist/tfjs.esm.js';

import { ExtractWeightsFunction, FCParams, ParamMapping } from './types';

export function extractFCParamsFactory(
  extractWeights: ExtractWeightsFunction,
  paramMappings: ParamMapping[],
) {
  return (
    channelsIn: number,
    channelsOut: number,
    mappedPrefix: string,
  ): FCParams => {
    const fc_weights = tf.tensor2d(extractWeights(channelsIn * channelsOut), [channelsIn, channelsOut]);
    const fc_bias = tf.tensor1d(extractWeights(channelsOut));

    paramMappings.push(
      { paramPath: `${mappedPrefix}/weights` },
      { paramPath: `${mappedPrefix}/bias` },
    );

    return {
      weights: fc_weights,
      bias: fc_bias,
    };
  };
}