Generation of a High-Resolution Image from a Single Low-Resolution Image Using Discrete Cosine Transformation
Shinya Suzuki, Hiroyuki Kudo · The Journal of The Institute of Image Information and Television Engineers · 2007
We propose a simple method to generate a high-resolution (HR) image from a single low-resolution (LR) image.The method solves a simultaneous linear equation that relates the HR image to the LR image.Since this equation is underdetermined,we utilize the energy compaction property of discrete cosine transformation to reduce the number of unknowns used to represent the HR image.We propose two different implementation methods.The first divides the LR image into a set of small blocks and the proposed method is applied to each block separately.The second implementation method applies the proposed method directly to the full image frame.The results of our simulation studies are shown.