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baij
Joined: 08 Dec 2007
Posts: 3
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 05 Jun 2008 6:57 How to add fog to a image by Matlab |
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| How to add the fog to a image or make the image like covered by fog (Matlab) ?. Please help me and send me the code. Thanks a lot.
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xulfee
Joined: 27 May 2008
Posts: 205
Helped: 25
Location: Pakistan
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| 11 Jun 2008 5:26 How to add fog to a image by Matlab |
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| do u want to blure ur image?if yes then just do low pass filtering with image,other wise some noise functions are available in matlab see their documentation
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echo47
Joined: 07 Apr 2002
Posts: 4205
Helped: 564
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| 11 Jun 2008 5:52 How to add fog to a image by Matlab |
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Are you talking about distance fog, like this?
http://en.wikipedia.org/wiki/Image:CGfog.jpg
Fog is basically a decrease in contrast or linear blending with a solid color such as blue-gray, but the amount of blending varies according to the distance to the objects in the scene. That's not something you can easily do without depth info.
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baij
Joined: 08 Dec 2007
Posts: 3
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| 28 Jun 2008 11:09 Re: How to add fog to a image by Matlab |
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Thanks. Here my code
| Code: |
function im=FogEffect(i)
a = imadjust(i,[0.1 0.1 0.1; 1 1 1],[0 0 0; 1 1 1]);
[m,n,d] = size(i);
for w = 1:3
for u = 1:m
for v = 1:n
if mod(v+u,2) == 0
a(u,v,w) = 225;
end
end
end
end
h = fspecial('gaussian',10,1);
im = imfilter(a,h);
end |
and result
After
But it's not really real fog. Some one can help me develop this code. Thanks for your help.
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echo47
Joined: 07 Apr 2002
Posts: 4205
Helped: 564
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| 28 Jun 2008 11:26 How to add fog to a image by Matlab |
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| What effect you are trying to achieve?
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baij
Joined: 08 Dec 2007
Posts: 3
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| 28 Jun 2008 11:34 Re: How to add fog to a image by Matlab |
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| In some case, when the objects are near or far. My code can not make the real fog in the image.
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echo47
Joined: 07 Apr 2002
Posts: 4205
Helped: 564
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| 28 Jun 2008 11:36 How to add fog to a image by Matlab |
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A JPEG image doesn't contain any depth information.
MATLAB can't guess the object distances.
Maybe you could manually paint fog onto the image by using something like Photoshop.
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