1. A method of enhancing image data, comprising: transforming image data from an intensity domain to a wavelet domain to produce a plurality of wavelet coefficients, wherein a first set of wavelet coefficients of the plurality of wavelet coefficients comprises low-frequency wavelet coefficients; modifying the first set of wavelet coefficients using a coefficient distribution based filter to produce a modified first set of wavelet coefficients, wherein modifying the first set of wavelet coefficients using the coefficient distribution based filter comprises partitioning the first set of wavelet coefficients into a plurality of regions, calculating a coefficient distribution for each region of the plurality of regions, modifying the coefficient distribution for each region, forming a coefficient transformation function for each region, and modifying the first set of wavelet coefficients using the coefficient transformation functions; and transforming the modified first set of wavelet coefficients from the wavelet domain to the intensity domain to produce enhanced image data.