error- real positive integers or logicals.

I get error as

    Subscript indices must either be real positive integers or logicals.

please can anyone tell why i get this error

am performing dualtree2D, my image is rgb and have converted into

    double(rgs2gray(x))

x is my input image ,

my dual tree code is

    x = imread('dock.jpg')     % Test signal
     J = 4;
     x=double(rgb2gray(x))% number of stages
     [Faf, Fsf] = FSfarras; % 1st stage anal. & synth. filters
     [af, sf] = dualfilt1;
     w = dualtree2D(x, J, Faf, af)

I got code from http://eeweb.poly.edu/iselesni/WaveletSoftware/dt2D.html

[Walter Roberson]

Exactly where do you get the error? What is the traceback shown?

[FIR]

walter i reseized the image and got it walter

now is there any code to reduce the co-efficient using noise shapping algorithm