Method for optimizing human face joint driving model based on sparse expression

The invention discloses a method for optimizing a face joint driving model based on sparse expressions. The invention provides a universal human face joint driving model, and optimizes a human face mixed shape by optimizing initial joint transformation under a neutral expression, fitting parameters of each target expression manual adjustment panel controller, optimizing original expression control parameters and composite expression control parameters to a joint transformation mapping matrix, and optimizing a human face joint driving model. And the human face joint drive after the corresponding role optimization is more natural. Meanwhile, an energy function and constraint conditions are designed, expressions required for optimization are innovatively designed, and face details such as lying silkworms and wrinkles are optimized into corresponding face mixed shapes through a preset mask method. According to the method, the problem of face joint driving optimization of the corresponding role can be efficiently