Signal Processing, Inc. — Department of Defense SBIR Phase I: Matrix completion has many applications such as link recovery, data mining, image reconstr

Description

Matrix completion has many applications such as link recovery, data mining, image reconstruction, etc. We propose a novel algorithm to solve the above mentioned matrix completion problem. In particular, we have derived a novel framework to approximate the rank by another function. This novel framework not only leads to state of the art results in reconstructing missing entries in data matrices, it also can be generalized to find missing values in tensor data which is considered to be significantly harder than the matrix case due to the complexity in its structure and which are unable to solve by previous approaches. Moreover, our new framework can easily deal with noisy measurements. We have proven two theorems to provide theoretical guarantees for convergence of solutions. Finally, we also have efficient implementation of our framework. Preliminary comparative studies with several recent algorithms in matrix completion have demonstrated that our algorithm achieves comparable approximation performance of the best algorithm in the literature and yet only requires 1% of the computations. The matrix dimension was several thousands. This means our algorithm is suitable for real-time matrix and tensor completion of large scale applications.