Great! I already liked to try Python in the browser and I was thrilled to find the WeScheme that was posted here. But using something, literally so visual as image processing is an awesome idea.
One comment: Maybe, I'm the only person in the world so tired and stupid. But at first I got the impression that it didn't execute in chrome or was so slow that it takes forever. So I fired up Firefox to test it there. Only then, did I realize, that the new computed picture would show up to the right of the code. I had zoomed in too much in chrome.
I guess the average Stanford student is smarter, but if you would force the picture to be below the code you might have one source of confusion less.
One comment: Maybe, I'm the only person in the world so tired and stupid. But at first I got the impression that it didn't execute in chrome or was so slow that it takes forever. So I fired up Firefox to test it there. Only then, did I realize, that the new computed picture would show up to the right of the code. I had zoomed in too much in chrome. I guess the average Stanford student is smarter, but if you would force the picture to be below the code you might have one source of confusion less.