looks around ready. if you want to be sure then grab a microscope off ebay for a few bucks and look at the trichomes. you want a bit of amber, with mostly cloudy, and hardly any clear
That picture isn't really good enough to give you a proper answer.
All I can see is a vague calyx and some vague colour.
I'd recommend you get a microscope or a loupe.
They are very inexpensive and they will ensure you get a proper harvest.
It's probably the best investment you can make for your grow.
if your not going to use a scope wich would deffinately be the way to go then look at the pistil color and wait for 75-80 percent red, and watch to see if buds are still growing or seem to hae stopped.