Using the Monte Carlo Method to find the area of an drawn image.
Live version here
Draw an image, run the monte carlo method to calculate it's area. Increase or decrese the number of samples used in the simulation. I have written a similar code that runs the simulation several times and get the mean of them all. I like this one better. The canvas is 500x500 pixels. So, if you color it all and click solve, you should get a result of 250000 pixels.
Canvas - Draw the image you want to calculate the area from.
Input - Enter the number of samples to be used in the simulation, in the input box.
Solve - Click to solve the aproximate area of the drawn image. You can click solve multiple times to get different results.
Clear - Clear the canvas.
Take a look at the code here