face-api/build/faceRecognitionNet/extractParamsFromWeigthMap.js

import { disposeUnusedWeightTensors, extractWeightEntryFactory } from '../common';
import { isTensor2D } from '../utils';
function extractorsFactory(weightMap, paramMappings) {
    const extractWeightEntry = extractWeightEntryFactory(weightMap, paramMappings);
    function extractScaleLayerParams(prefix) {
        const weights = extractWeightEntry(`${prefix}/scale/weights`, 1);
        const biases = extractWeightEntry(`${prefix}/scale/biases`, 1);
        return { weights, biases };
    }
    function extractConvLayerParams(prefix) {
        const filters = extractWeightEntry(`${prefix}/conv/filters`, 4);
        const bias = extractWeightEntry(`${prefix}/conv/bias`, 1);
        const scale = extractScaleLayerParams(prefix);
        return { conv: { filters, bias }, scale };
    }
    function extractResidualLayerParams(prefix) {
        return {
            conv1: extractConvLayerParams(`${prefix}/conv1`),
            conv2: extractConvLayerParams(`${prefix}/conv2`)
        };
    }
    return {
        extractConvLayerParams,
        extractResidualLayerParams
    };
}
export function extractParamsFromWeigthMap(weightMap) {
    const paramMappings = [];
    const { extractConvLayerParams, extractResidualLayerParams } = extractorsFactory(weightMap, paramMappings);
    const conv32_down = extractConvLayerParams('conv32_down');
    const conv32_1 = extractResidualLayerParams('conv32_1');
    const conv32_2 = extractResidualLayerParams('conv32_2');
    const conv32_3 = extractResidualLayerParams('conv32_3');
    const conv64_down = extractResidualLayerParams('conv64_down');
    const conv64_1 = extractResidualLayerParams('conv64_1');
    const conv64_2 = extractResidualLayerParams('conv64_2');
    const conv64_3 = extractResidualLayerParams('conv64_3');
    const conv128_down = extractResidualLayerParams('conv128_down');
    const conv128_1 = extractResidualLayerParams('conv128_1');
    const conv128_2 = extractResidualLayerParams('conv128_2');
    const conv256_down = extractResidualLayerParams('conv256_down');
    const conv256_1 = extractResidualLayerParams('conv256_1');
    const conv256_2 = extractResidualLayerParams('conv256_2');
    const conv256_down_out = extractResidualLayerParams('conv256_down_out');
    const fc = weightMap['fc'];
    paramMappings.push({ originalPath: 'fc', paramPath: 'fc' });
    if (!isTensor2D(fc)) {
        throw new Error(`expected weightMap[fc] to be a Tensor2D, instead have ${fc}`);
    }
    const params = {
        conv32_down,
        conv32_1,
        conv32_2,
        conv32_3,
        conv64_down,
        conv64_1,
        conv64_2,
        conv64_3,
        conv128_down,
        conv128_1,
        conv128_2,
        conv256_down,
        conv256_1,
        conv256_2,
        conv256_down_out,
        fc
    };
    disposeUnusedWeightTensors(weightMap, paramMappings);
    return { params, paramMappings };
}
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