Moving at the cam

The main problem w/ my webcam script, is that it always take a shot even when nothing is on the desk, by night for example or when i’m at work. Beside i can use something like monitor, it isn’t the best way since i use a huge amout of CPU. So i decide to save picture only if the previous one is not the same. But how to compare two pictures ? After a little googling I found this:

import Image

h1 =
h2 =

rms = math.sqrt(reduce(operator.add,map(lambda a,b: (a-b)**2, h1, h2))/len(h1))

So now i only save the picture in my snapshot folder if the RMS is greater that 100, so no more 10 times the same one.

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