Noise

addnoise(M, p, n) Returns matrix M with added noise, with probability p/2 to add or subtract n to or from the pixel intensity.

Arguments:

• M is an image matrix.
• p is a real number between 0 and 1, inclusive.
• n is a real number with absolute value between 0 and 255, inclusive.

Notes:

• The function will clip the resulting pixel values to the range 0 to 255.