Virtual character face driving method and device, terminal equipment and readable storage medium

The invention provides a virtual character face driving method and device, terminal equipment and a readable storage medium, and the method comprises the steps: obtaining a face image of a user, carrying out the face key point detection of the face image, and obtaining the face key points of the user; smoothing the face key points of the user; performing alignment processing on the user face key points after smoothing processing and standard face key points by adopting a least square method to obtain an aligned face key point matrix; dividing the aligned face key point matrix according to face parts to obtain a key point matrix of each part; dividing each expression base according to the face part to obtain an expression base matrix of each part; inputting the expression basis matrix of each part into the corresponding part key point matrix for sparse coding, and calculating each coding coefficient; and driving the face of the virtual character by adopting each coding coefficient. According to the method, the