fprint-r303t/fingerprint.js

Install:

const __await = require('tslib');
const fs = require('fs');

let Finger;

Finger = require('./libfprint');

let processImage = async (timeout) => {
  timeout = parseInt(timeout) || 10000;

  let config = { width: 214, height: 214, rotate: 180 };

  let image = await Finger.getImage(timeout, true, Object.assign(config || {}));
  if (!image) throw new Error('No image with finger');

  console.log('---> enroll end');
  let mask;
  mask = await image.constructor.read('mask.png');

  console.log('---> resize start\n');
  await image.resize(config.width, config.height);

  console.log('---> mask start');
  await image.mask(mask, Math.ceil((config.width - 192) / 2), Math.ceil((config.height - 192) / 2));
  console.log('---> crop start');
  await image.crop(Math.ceil((config.width - 192) / 2), Math.ceil((config.height - 192) / 2), 192, 192);
  if (config.rotate) {
    console.log('---> rotate start');
    await image.rotate(parseInt(config.rotate));
  }
  let buf = await new Promise((resolve, reject) => image.getBuffer(image.constructor.MIME_PNG, (err, buffer) => err ? reject(err) : resolve(buffer)));
  return buf;
}

let i = 0;
let errIndex = 0;
let checkFinger = () => {
  processImage(5000)
    .then(buffer => {
      if (buffer) {
        fs.writeFile(`./test${i}.png`, buffer, function (err) {
          if (err) {
            return console.log(err);
          }
        });
        if (i < 10) {
          i++;
          console.log('--->scan №', i + 1, ' start');
          checkFinger();
        }
      }
      else console.log('--->image=', buffer);
    })
    .catch(e => {
      errIndex++;
      console.log('--->errIndex = '+ errIndex);
      console.error(e);
      setTimeout(() => checkFinger(), 1000);
    });
}

checkFinger();


module.exports = processImage;