The output is similar to bilinear interpolation, but the smoothing effect caused by the averaging of surrounding input pixel values in more dramatic. Stair-step effect caused by the nearest neighbor approach is reduced.
Image looks smooth.
Alters original data and reduces contrast by averaging neighboring values together. Is computationally more expensive than nearest neighbor or bilinear interpolation. Unrectified raster image Figure 3. Rectified using nearest neighbor resampling. Notice the dark edge cells created by averaging zero values located around the perimeter of the ouput file into real data values.