fv/lib/filters/binarize.js

FormVision is a node.js library for extracting data from scanned forms

// Generated by CoffeeScript 2.3.1
var dv, tesseractInstance;

dv = require('dv');

tesseractInstance = null;

// Return a binarized version of *image*. Currently uses Tesseract for this.
module.exports = function(image) {
  if (tesseractInstance == null) {
    tesseractInstance = new dv.Tesseract();
  }
  tesseractInstance.image = image;
  return tesseractInstance.thresholdImage();
};