Image-based three-dimensional reconstruction and model training method and device, and storage medium

The embodiment of the invention provides an image-based three-dimensional reconstruction and model training method and device and a storage medium, and the method comprises the steps: obtaining the face shape features of a first frequency, a second frequency and a third frequency corresponding to a two-dimensional face image, the frequency is used for indicating the change rate of the face shape features, the first frequency is lower than the second frequency, and the second frequency is lower than the third frequency; generating a corresponding basic three-dimensional face grid according to the face shape features of the first frequency; according to the face shape features of the second frequency and the third frequency, feature refinement is carried out on the basic three-dimensional face grid, and a target three-dimensional face grid is generated; and generating a three-dimensional face model corresponding to the two-dimensional face image according to the target three-dimensional face grid. Through the e