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Re: need example for fisheye effect on images
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From: |
Kevin H. Hobbs |
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Subject: |
Re: need example for fisheye effect on images |
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Date: |
Fri, 21 Sep 2012 12:14:22 -0400 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120828 Thunderbird/15.0 |
On 09/21/2012 11:21 AM, paiuia wrote:
>
> With
> I = imread('c:\users\ax\desktop\_math\sfera.jpg');
> S = conv2 (I, ones (5, 5) / 25, "same");
> [Dx, Dy] = gradient (S);
>
> I get error:
> " error: invalid conversion of uint8 matrix to Matrix "
>
Convert your image to double first.
I = double(I);
Then do your processing.
Then convert it back (or not) to unsigned int to write it.
% rescale and write
m = max(max( I ));
imwrite( uint8( I / m * 255 ), "out.png" );
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