In this digital era, huge amount of digital data is transferred from place to another due to vast digital technology. The
transfer of data and images from one point to another plays a vital role in this digital world. One of the common examples of
digital data is image. During transferring of image, it may lose its quality and it is also sensitive to noise which degrades the
quality of the image or destroy its edges. To overcome all these problems image processing is used. In image processing, nonlinear filters plays a vital role in removal of impulse noise (salt and pepper noise) as linear filter fails to do so. At very high noise
density the existing non linear filter either fails to preserve edges or fails to get better denoised image at noise density as high as
99%. In present work, a modified two-stage algorithm is proposed which is the fusion of best existing non linear filtering
techniques, for retaining the denoised image as much as possible.
