title: Image pixel color picker with jQuery
body: <p>First of all this is not a simple "color picker". So there's a picture (size and content does not matter) and i want to pick the color of some pixels (and then use these color to generate a HTML or Canvas based halftone "image").</p>
  
  <p><img src="https://i.stack.imgur.com/5a4Bl.png" alt="how it work"></p>
  
  <p>For example: There is a 240x240 image. I want to pick the color of the following coordinates: x80y80, x80y160, x160y80, x160y160. How can i get them with jQuery/javascript (excluding jQuery UI)? Is it necessary to use canvas element?</p>
  
  <p>I would appreciate if somebody could help me on this mission.</p>