arifd

// I wrote a sobel edge detector in Javascript!
// todo: try Laplacian of Gaussian (LoG) instead of Sobel

// Example usage (taking the pxiels 1D):
// const edge = createEdgeMapFromImageData(imageData);
// for (const i in edge) {
//   let x = i % canvas.width;
//   let y = (i - x) / canvas.width;
//   ctx.fillStyle = `rgba(${edge[i]},${edge[i]},${edge[i]},255)`;
//   ctx.fillRect(x, y, 1, 1 );

arifd

export function listFactors(target) {
  let primes = listPrimes(target);
  let factors = [];
  for (let i = 0; i < primes.length; i++) {
    if ((target % primes[i]) === 0) factors.push(primes[i]); 
  }
  return factors;
}

// list all prime numbers up to n

arifd

// If you want to load an image but have it be scaled.
// instead of 'new Image();' call this function, with onload being its 3rd argument.
function createScaledImageFromSource(src, scaleFactor, callback = null)
{
  let img = new Image();
  img.src = src;

  let outImage = new Image();

  img.onload = () => 

arifd

// In INITIALISATION:

  // create webcam stream
  let video      = document.createElement('video');
  video.width    = 320;
  video.height   = 240;
  video.autoplay = true;
  let constraints = {video: true};
  navigator.mediaDevices.getUserMedia(constraints).then(stream => video.srcObject = stream);