1. A method for determining control parameters for image enhancement, the method comprising the acts of: receiving image data for a first frame; calculating an adaptive threshold value based on the image data; determining a pixel slope distribution for a pixel window of the image data, wherein the pixel window is selected based on the adaptive threshold value; determining a spectrum estimation coefficient based on the pixel distribution, wherein the spectrum estimation coefficient is determined based on the spectral components of the image data; and determining one or more control parameters for enhancement of the image data based on the spectrum estimation coefficient, wherein the one or more control parameters relate to filtering parameters for adaptive enhancement of image data.