face-api/build/xception/extractParams.js

import { extractConvParamsFactory, extractSeparableConvParamsFactory, extractWeightsFactory } from '../common';
import { range } from '../utils';
function extractorsFactory(extractWeights, paramMappings) {
    const extractConvParams = extractConvParamsFactory(extractWeights, paramMappings);
    const extractSeparableConvParams = extractSeparableConvParamsFactory(extractWeights, paramMappings);
    function extractReductionBlockParams(channelsIn, channelsOut, mappedPrefix) {
        const separable_conv0 = extractSeparableConvParams(channelsIn, channelsOut, `${mappedPrefix}/separable_conv0`);
        const separable_conv1 = extractSeparableConvParams(channelsOut, channelsOut, `${mappedPrefix}/separable_conv1`);
        const expansion_conv = extractConvParams(channelsIn, channelsOut, 1, `${mappedPrefix}/expansion_conv`);
        return { separable_conv0, separable_conv1, expansion_conv };
    }
    function extractMainBlockParams(channels, mappedPrefix) {
        const separable_conv0 = extractSeparableConvParams(channels, channels, `${mappedPrefix}/separable_conv0`);
        const separable_conv1 = extractSeparableConvParams(channels, channels, `${mappedPrefix}/separable_conv1`);
        const separable_conv2 = extractSeparableConvParams(channels, channels, `${mappedPrefix}/separable_conv2`);
        return { separable_conv0, separable_conv1, separable_conv2 };
    }
    return {
        extractConvParams,
        extractSeparableConvParams,
        extractReductionBlockParams,
        extractMainBlockParams
    };
}
export function extractParams(weights, numMainBlocks) {
    const paramMappings = [];
    const { extractWeights, getRemainingWeights } = extractWeightsFactory(weights);
    const { extractConvParams, extractSeparableConvParams, extractReductionBlockParams, extractMainBlockParams } = extractorsFactory(extractWeights, paramMappings);
    const entry_flow_conv_in = extractConvParams(3, 32, 3, 'entry_flow/conv_in');
    const entry_flow_reduction_block_0 = extractReductionBlockParams(32, 64, 'entry_flow/reduction_block_0');
    const entry_flow_reduction_block_1 = extractReductionBlockParams(64, 128, 'entry_flow/reduction_block_1');
    const entry_flow = {
        conv_in: entry_flow_conv_in,
        reduction_block_0: entry_flow_reduction_block_0,
        reduction_block_1: entry_flow_reduction_block_1
    };
    const middle_flow = {};
    range(numMainBlocks, 0, 1).forEach((idx) => {
        middle_flow[`main_block_${idx}`] = extractMainBlockParams(128, `middle_flow/main_block_${idx}`);
    });
    const exit_flow_reduction_block = extractReductionBlockParams(128, 256, 'exit_flow/reduction_block');
    const exit_flow_separable_conv = extractSeparableConvParams(256, 512, 'exit_flow/separable_conv');
    const exit_flow = {
        reduction_block: exit_flow_reduction_block,
        separable_conv: exit_flow_separable_conv
    };
    if (getRemainingWeights().length !== 0) {
        throw new Error(`weights remaing after extract: ${getRemainingWeights().length}`);
    }
    return {
        paramMappings,
        params: { entry_flow, middle_flow, exit_flow }
    };
}
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