The standard deviation at any point in image averaging: (x, y) = 1/ K (x, y), where (x, y) is the average image formed by averaging K different noisy images and (x, y) is the noise added to an original image f(x, y). What is the relation between K and the variability of the pixel values at each location (x, y)?

• A. tIncrease in K, decreases the noise of pixel values
• B. tIncrease in K, increases the noise of pixel values
• C. tDecrease in K, decreases the noise of pixel values
• D. tDecrease in K, increases the noise of pixel values