获取图像的像素，每个像素之间有一定距离-Javascript

Question

所以我基本上是在做一个图像，上面有一些语言字符，我想从图像中获取像素，以显示字符的图案，它们之间有一定距离，我写的代码可以正常工作，但是在那里有两个问题： 1.像素间距不一致 2.在粗体字符上正确分配像素

const PNGjs = require('pngjs-image');
const fs = require('fs');
let cordinates = [];
let newCordinates = [];
let minDistance = 20;
let count = 0;
let preX, preY = -1;

PNGjs.readImage('./assets/output/A.png', function(err, image) {

  for(let i = 0; i < image.getHeight(); i++) {
    for(let j = 0; j < image.getWidth(); j++) {
      if(image.getPixel(j, i) === -16777216){
          cordinates.push({x: j, y: i});
      }
    }
  }

  for(let i = 0; i < cordinates.length; i=i+80){
    for(let j = 0; j < cordinates.length; j=j+50){
      let cord1 = cordinates[i];
      let cord2 = cordinates[j];

      let min = parseInt(Math.sqrt(Math.pow(cord1.x - cord2.x, 2) + Math.pow(cord1.y - cord2.y, 2)).toFixed(0));
      if(min > 20 && min < 40) {
          newCordinates.push(cord2);
          j = j + 50;
      }
    }
  }

  let p = [];
  console.log('[STEP 3] : started')
  for(let i = 0; i < newCordinates.length; i++){
    if(p.indexOf(newCordinates[i]) === -1)
      p.push(newCordinates[i])
  }

  // writes the file to coordinates.json
  fs.writeFile('./coordinates.json', JSON.stringify(p), function(err) {
    if (err) throw err;

    console.log("coordinates.json saved");
  })
});