The goal of this research was to present an approach which address both de noising and contrast enhancement.1)2D wavelet transform （WT）.2)At finer scales

wavelet phase filter was used in WT domain to reduce noise and at coarse scales

and semisoft wavelet shrinkage technique was used to furtrher reduce noise.3)Based on human visual properties

the coefficients of 2D WT of image were emphasized by a generalized adaptive gain nonlinear operator.4)Image reconstruction.Preliminary results show that the proposed approach can make unseen or barely seen features of an image more obvious without generating artifacts and enhance the contrast of region of interest in images while reducing the enhancement of noise.