Error in flipping

Hi, all

I have a problem in flipping an image. I use flipud function from Matlab, but it keeps error

img = imread('peppers.png'); F = flipud(img); imshow(img); title('Image'); figure, imshow(F); title('Flip Vertical');

The error message was

??? Error using ==> flipud at 19 X must be a 2-D matrix.

Error in ==> Untitled8 at 4 F = flipud(img);

Can anyone tell me how to solve this? Thanks

Answer 1

[Chandra Kurniawan]

Hi,

It seem you use flipud command for 3D matrix.

Peppers.png was 3D uint8 matrix.

'??? Error using ==> flipud at 19 X must be a 2-D matrix' - means flipud takes 2D matrix.

So, you can use my function to perform 3D flipping :

function J = flipping(I)

[row col dim] = size(I);
J = zeros(row,col,dim);
mirror = floor(row/2);
for x = 1 : row-1
    for y = 1 : col-1
        J(x,y,:) = I((2*mirror)-x,y,:);    
    end
end

And then you can call it by :

I = imread('peppers.png');
J = flipping(I);
imshow(uint8(J));

And see the result below :

%

[Cecilia Adriana]

Thanks, sir!

It works

Answer 2

[Andrei Bobrov]

F = img(end:-1:1,:,:);

[Cecilia Adriana]

It works too,

thanks anyway!