1. An apparatus, comprising: a processor; and a media processing node arranged to enhance sharpness of an input image using said processor, said media processing node comprising: a receiver to receive the input image; a wavelet decomposition module to perform multiple levels of wavelet decomposition of said input image by performing wavelet analysis for edge detection using a wavelet transform, said wavelet analysis comprising a windowing technique with variable-sized time regions; and an edge enhancement module to perform horizontal, vertical, and diagonal enhancement on high frequency components of wavelet decomposition output from said wavelet decomposition module.