def oh_bithash(histogram): return histogram_hash(histogram.astype("double"))
def cl_bithash(cY, cCb, cCr): return histogram_hash( numpy.concatenate( cY, cCb, cCr).astype('double'))
def oh_bithash(histogram): return histogram_hash( histogram.astype('double'))
def edge_histo_bithash(histogram): return histogram_hash( histogram.astype('double'))