title: Compare pixel values in photoshop
body: <p>i want to make a little photoshop javascript. Technically, i just need to know how to compare the color values of pixels af if they were an array with three integer values in each, for example: (pseudocode)</p>
  
  <pre><code>for all pixels x
      for all pixels y
          if left pixel's green channel is bigger than red channel:
              set the blue channel to 25
          else
              if the blue channel is greater than 50
                  set the green channel to 0
  </code></pre>
  
  <p>in the documentation, there's a ton of things like filters, text and layers you can do, but how do you do something as simple as this?</p>