Resolution-Invariant Image Representation for Content-Based Zooming

This paper presents a novel Resolution-Invariant Image Representation (RIIR) framework, and applies it for Content-Based Zooming (CBZ) applications. We explain how to generate a multi-resolution bases set, from which the learned image representation can be resolution-invariant. This provides the key technology to support the continues image up-scaling task for the CBZ applications, which existing example-based resolution enhancement approaches cannot handel, or simply 2-D image interpolation algorithm cannot give satisfactory image quality for. We discuss two clustering based methods to construct the bases set. Experimental results show that, both the two methods give good image quality, and the proposed RIIR framework outperforms existing methods in various aspects.