Noise estimator by S.C. Tai, S.M. Yang

A fast method for image noise estimation using Laplacian operator and adaptive edge detection

-- Function file: TaiYang(Im, p, comment)

Noise estimator by S.C. Tai, S.M. Yang

Shen-Chuan Tai, Shih-Ming Yang, 'A fast method for image noise estimation using Laplacian operator and

adaptive edge detection', Communications, Control and Signal Processing, 2008. ISCCSP 2008

Correct equation in :

O. Laligant, F. Truchetet, E. Fauvet, 'Noise estimation from digital

step-model signal', IEEE Trans. Image Processing, 2013 Dec., 22(12):5158:67

Parameters:

sigma = TaiYang(Im, p, comment)

Im : image

p : percentage of points having low gradient to take into account comment

returned result : noise standard deviation (sigma)

Example : [sigmaTai, useful_pixels_percentage] = TaiYang("house.bmp", 10, 0);