Improvement of the image enlargement method based on the Laplacian pyramid representation

The Laplacian pyramid is the hierarchical expression. Based on Laplacian pyramid representation, the prediction of unknown higher-frequency components is equivalent to the prediction of an unknown high-resolution Laplacian image. Gaussian filter is used for calculating of the Laplacian pyramid. And the band-width of the Gaussian filter is optimal for image compression. However, we cannot assert the band-width is optimal for the image enlargement method. In this paper, we change the band-width of the Gaussian filter in order to improve the performance of the enlargement method based on Laplacian pyramid representation. We show that the emphasis degree is changed by changing the band-width of the Gaussian filter.