Absolutely ready, now I'm no professional but from my reading I've discovered that theres two good indicators of harvest time...
Don't freak out! Yellowing of the leaves is a sign that its time to harvest...
second big indicator is that 70-90% of the pistils should be brown and wilted, in your case I'd say that's apparent haha... anyways... chop that bitch!
edit: those leaves are looking a little brown tho... did you flush your plant? Could be a nute problem