Image Enlargement using Biharmonic DP-Ball Surface

An image enlargement has intensified in many studies due to its novel approach of re-sizing image through scaling up or scaling down. Consequently, it allows smaller image to fit a larger screen when it is in a full display mode. It is also applicable in reducing higher image resolution into a lower image resolution. Conversely to some of its limitations, this study focuses on double enlargement of the original image by employing biharmonic cubic DP-Ball with respect to four boundary curves condition. Seven grey-scale test images are used in order to study the performance of the method. The performance indicator namely Peak Signal to Noise Ratio (PSNR) is used to compare the ability of the method compared to some existing methods.