Unsupervised shape discovery using synchronized spectral networks

Highlights：

• A new unsupervised shape discovery method using a novel joint foreground/background segmentation and a dense part-part correspondence between all image pairs.

• A new multiscale spectral synchronization method which jointly align the spectral representations of all input images.

• A novel unsupervised superpixel-based groupwise co-registration which converts the implicit eigenvector-eigenvector synchronization to superpixel-superpixel dense correspondences.