Image Enhancement by Intensity Based Interpolation and Selective Threshold

In this paper a new approach for image enhancement considering pixel intensity variation for interpolation is presented. This technique determines edges by comparing the intensity variations between centre pixel and its neighboring pixels of window size 5 5. On the basis of designed thresholds, extrapolated blank pixels are filled. The sliding window 5 5 size gives better result over window size 3 3. The proposed method is tested on satellite and medical images. The quantitative and subjective results have established superiority of the proposed scheme over linear interpolation methods.