51 results about "Domain level" patented technology

The invention discloses a cross-domain three-dimensional model retrieval method based on a multi-level feature alignment network, and the method comprises the steps: carrying out virtual photographingof a three-dimensional model in a three-dimensional model database through a virtual camera, and generating multi-view data; constructing a multi-level feature alignment network; performing domain-level feature alignment on an image and the features of the three-dimensional model by s discriminator through an alignment network; calculating centroids of all features of each class in the two domains of the image and the three-dimensional model based on the alignment network, taking the distance between the centroids of the same class as a part of a loss function, and minimizing the loss function by using a back propagation algorithm; and when the loss function is minimized, respectively extracting features of the image and the three-dimensional model by utilizing the trained multi-level feature alignment network, and carrying out cross-domain three-dimensional model retrieval. According to the method, a new network framework, namely a multi-level feature alignment network, is provided,feature alignment is carried out on an image domain and a three-dimensional model domain on the domain level and the class level, and the cross-domain three-dimensional model retrieval precision is improved.