A framework for image magnification: induction revisited

An original image magnification method called induction was proposed recently, whose specificity is to state the problem of image magnification as an inverse problem of image reduction. The methods usually employed, like interpolation, fail to verify this constraint, which provides a formalism for magnification and a framework for evaluating the quality of the enlarged images. In this paper, we revisit the induction through a new interpretation using wavelets. We put forward major improvements including a direct implementation, much more efficient than the iterative algorithm proposed previously.