@vladmandic/face-api/src/faceFeatureExtractor/extractorsFactory.ts

FaceAPI: AI-powered Face Detection & Rotation Tracking, Face Description & Recognition, Age & Gender & Emotion Prediction for Browser and NodeJS using TensorFlow/JS

import { extractConvParamsFactory, extractSeparableConvParamsFactory, ExtractWeightsFunction, ParamMapping } from '../common/index';
import { DenseBlock3Params, DenseBlock4Params } from './types';

export function extractorsFactory(extractWeights: ExtractWeightsFunction, paramMappings: ParamMapping[]) {
  const extractConvParams = extractConvParamsFactory(extractWeights, paramMappings);
  const extractSeparableConvParams = extractSeparableConvParamsFactory(extractWeights, paramMappings);

  function extractDenseBlock3Params(channelsIn: number, channelsOut: number, mappedPrefix: string, isFirstLayer = false): DenseBlock3Params {
    const conv0 = isFirstLayer
      ? extractConvParams(channelsIn, channelsOut, 3, `${mappedPrefix}/conv0`)
      : extractSeparableConvParams(channelsIn, channelsOut, `${mappedPrefix}/conv0`);
    const conv1 = extractSeparableConvParams(channelsOut, channelsOut, `${mappedPrefix}/conv1`);
    const conv2 = extractSeparableConvParams(channelsOut, channelsOut, `${mappedPrefix}/conv2`);

    return { conv0, conv1, conv2 };
  }

  function extractDenseBlock4Params(channelsIn: number, channelsOut: number, mappedPrefix: string, isFirstLayer = false): DenseBlock4Params {
    const { conv0, conv1, conv2 } = extractDenseBlock3Params(channelsIn, channelsOut, mappedPrefix, isFirstLayer);
    const conv3 = extractSeparableConvParams(channelsOut, channelsOut, `${mappedPrefix}/conv3`);

    return {
      conv0, conv1, conv2, conv3,
    };
  }

  return {
    extractDenseBlock3Params,
    extractDenseBlock4Params,
  };
}