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The very interesting thing is that it goes through transparent portions of png backgrounds. Try it in the google logo.

I am very impressed.

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What? I could not believe what you wrote but you are right, it does go through transparent background.

http://i.imgur.com/byfmzAJ.png

How did he make it work? I didn't think this would be possible.

Yes, extremely impressed with the tool.

EDIT: Looked at the code. He takes screenshot of the active tab when extension is clicked. And then parses the PNG in measureDistances function when mouse moves.

https://github.com/mrflix/dimensions/blob/master/extension/d...

For a mouse at position X, Y, it tries to find the farthest Top, Bottom, Right, Left points with same color/threshold. This is why it is able to see through 'transparent' Google logo.

https://github.com/mrflix/dimensions/blob/master/js/worker.j...

Great work.

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