MATLAB: Frame of Animated Gif

animated gif

Hi, all. I want to make a steganography program using LSB in matlab. I use animated GIF for the cover object. As we know that Animated GIF is a file that consists of many images. So, can anyone tell me: How to get the frame number of this file in matlab? Thanks before.

Best Answer

http://www.mathworks.com/help/techdoc/ref/imread.html#f25-722074

Read all of the frames using imread(), and then look at the size of what is returned.

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MATLAB: How to convert a GIF file to a AVI file

I've written a function that converts GIF --> AVI based on Walter's 2018 answer.

Download gif2avi()

gif2avi(file) will convert the gif file to avi and will save it to your current directory. See the documentation for that function for additional inputs.

Let me know if you have an problems.

MATLAB: Issue with colormap when displaying an image extract from an animated gif file

Ok, iget it myself :

It seems that when we do (num <> 1)

GIF_file = dir([PathName, '*velocity*.gif']);
[im, map] = imread([GIF_file.folder, '\', GIF_file.name], 'frames', num);

'map' is always the colormap of the first image of the animated GIF. So, it's better to do :

infos = imfinfo([GIF_file.folder, '\', GIF_file.name], 'gif');
[im, map] = imread([GIF_file.folder, '\', GIF_file.name], 'frames', num);
imshow(im)
colormap(infos(num).ColorTable)

In this way, i get the good result for each frame of the animated GIF.

Best Answer

Related Solutions

MATLAB: How to convert a GIF file to a AVI file

MATLAB: Issue with colormap when displaying an image extract from an animated gif file

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