the example program on shearlet transform code not working

I have the code below:

% simple example for FFST
% computes the shearlet transform of some geometric image
%
%--------------------------------------------------------------------------
% Sören Häuser ~ FFST ~ 2014-07-22 ~ last edited: 2014-07-22 (Sören Häuser)

% create image

A = rgb2gray(imread('G:/matlab2013/Crack/bin/gm.jpg'));

% shearlet transform

[ST,Psi] = shearletTransformSpect(A);

% inverse shearlet transform

C = inverseShearletTransformSpect(ST,Psi);

% plot results

subplot(2,2,1)
imagesc(A)
axis image off
colormap(gray)
title('original image')

subplot(2,2,2)
imagesc(abs(ST(:,:,18)))
axis image off
colormap(gray)
title('shearlet coefficients')

subplot(2,2,3)
imagesc(Psi(:,:,18))
axis image off
colormap(gray)
title('shearlet')

subplot(2,2,4)
imagesc(C)
axis image off
colormap(gray)
title('reconstructed image')

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plz how to make it work....

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its giving error like:

>> simple_example

Warning: Image is integer valued! 

> In checkImage at 19

    In shearletTransformSpect at 56

    In simple_example at 12 

Error using shearletTransformSpect (line 56)

Argument 'A' failed validation checkImage.

Error in simple_example (line 12)

[ST,Psi] = shearletTransformSpect(A);

------------------------------------------------------------------

gm.jpg is a natural image

[hp]

Image

Answer 1

[hp]

this is wat input image i have given to simple_example program to obtain shearlet coefficients and shearlets

[ponnu kunnath]

>> sshshss Undefined function or variable 'shearletTransform'.

Error in sshshss (line 7) [ST,Psi] = shearletTransform(A);for above code error like this is shown,pls help

[Walter Roberson]

shearletTransform is from http://www.shearlab.org/

Answer 2

[Walter Roberson]

You have to put

A = double(A);

after your

A = rgb2gray(imread('G:/matlab2013/Crack/bin/gm.jpg'));