Sharpening Interpolated Image by Using Cube of Pixel Difference and Evaluation in Frequency Domain
Naoki Ono, Kiichi Urahama · Journal of the Institute of Industrial Applications Engineers · 2016
In order to improve image resolution, some interpolation has to be applied. However, in general, an interpolation generates smooth connections between adjacent sampling points and causes blurred edges in the interpolated image. To suppress such blur in edges, it is desired that some sharpening effect is included in the interpolating process. In this paper, we propose a sharpening method using cubic operations of the differences of pixel values. Experimental results show that this method produces sharp high resolution image which is more similar than that by any other method to a target image.