fix the error? ??? Undefined function or method 'conv2' for input arguments of type 'double' and attributes 'full 3d complex'.

 clear all;
 close all;
 clc;
 I=imread('pic.jpg');
 imshow(I);

 %%Gabor
 phi = 6*pi/8;
 theta = 2;
 sigma = 0.65*theta;
 filterSize = 5;

 G = zeros(filterSize);

for i=(0:filterSize-1)/filterSize
    for j=(0:filterSize-1)/filterSize
        xprime= j*cos(phi);
        yprime= i*sin(phi);
        K = exp(2*pi*theta*sqrt(-1)*(xprime+ yprime));
        G(round((i+1)*filterSize),round((j+1)*filterSize)) =    exp(-(i^2+j^2)/(sigma^2))*K;
    end
 end

%%Convolve
J = conv2(I,G);
figure, imshow(imag(J));

Answer 1

[Wayne King]

I'm sure the problem is coming from the fact that your input I is 3-D. What would you expect 2-D convolution to do with a 3-D array and a 2-D matrix (your G)

How about doing this?

I = imread('pic.jpg');
I = double(rgb2gray(I)); % if you have the Image Processing Toolbox

Then try

J = conv2(I,G);

[saipb]

Wayne,

How does the above solution take care of the fact that a 2-D convolution is being performed with a 3-D array and a 2-D matrix? It only takes care of the the data type being double. Isn't it? I am also interested in performing a 2-D Gaussian filter, however, because I use meshgrid and compute the Gaussian using x and y which are now 3D variables, even my 2D filter will turn out to be 3D. In such a scenario, is it possible to use conv2(u,G_xy) or should I just go with convn(u,G_xy)?

-Sai