tesseract.js-v2-beta-sample-code-3.js

const { createWorker, createScheduler } = require('tesseract.js');
const image = 'https://tesseract.projectnaptha.com/img/eng_bw.png';

const scheduler = createScheduler();

(async () => {
  for (let i = 0; i < 4; i++) {
    const w = createWorker();
    await w.load();
    await w.loadLanguage('eng');
    await w.initialize('eng');
    scheduler.addWorker(w);
  }
  const rets = await Promise.all(Array(10).fill(0).map(() => (
    scheduler.addJob('recognize', image);
  )));
  console.log(rets.map(({ data: { text } }) => text));
  await scheduler.terminate();
})();