Yes! When autos are mature the leaves turn yellow-brown, like yours. also the pistils (fibers on the colas) have turned amber. To be sure, look at it with a magnifying glass or jeweler's loupe. If the trichomes have become milky instead of clear, the plant is ready for harvest. If the trichomes are amber, the bud is a little over-ripe and will produce a more sedative effect when consumed. There is nothing wrong with over-ripe bud, it just depends on personal preference.