title: Access raw YUV values from JPEG with JavaScript
body: <p>I have dynamically loaded a JPEG image into a 2D html canvas and I would like to access the raw YCbCr pixel values.</p>
  
  <p>From what I understand, JPEG encodes the pixel data in YCbCr, but chrome appears convert it to RGB when accessing it with getImageData().</p>
  
  <p>I have tried using the RGB to YCbCr conversion calculations but it appears to be a lossy conversion as they don't map perfectly 1-to-1.</p>
  
  <p>Is it possible to access the raw YCbCr pixel values in JavaScript?</p>