From the data analysis by means of the Original Image has a greater proximity to the real space. It is also used for automated space-correlation (spatial autocorrelation) in order to analyze a group of image points.
The analysis by the Original Image is the closest to the real space over. They are also used to find the spatial auto-correlation (spatial autocorrelation) to analyze the clustering of the pixels.
From the data analysis, how to Original Image is similar to the real space. It also uses spatial correlation automatic (spatial autocorrelation). To analyze the value of the pixel.