NOVEL IMPULSE DETECTION TECHNIQUE FOR IMAGE DENOISING

In this paper a simple noise (Salt and Pepper) detection technique is proposed by using 3 x 3 sub-windows in which the test pixel appears. A weight is assigned to the test pixel based on its position after sorting in each sub-window. Two thresholds are used to decide whether the test pixel is corrupted or not. If corrupted then only the standard median of the 3 x 3 vicinity is used to eliminate noise, other –wise no filtering is applied. The proposed scheme is simulated using standard images under different noisy conditions. The performance study shows the superiority of the proposed scheme over the existing standard median filters using 3 x 3 and 5 x 5 windows.