def ParseFromString(self, serialized):
    self.Clear()
    self.MergeFromString(serialized)
Computes the second camera matrix (assuming P1 = [I 0]) 
dataset/ETHPy150Open AppScale/appscale/AppServer/google/net/proto2/python/public/message.py/Message.ParseFromString--crossover with--dataset/ETHPy150Open jesolem/PCV/PCV/geometry/sfm.py/compute_P_from_essential