Why do I see an all white image when I use IMFILTER?

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ibrahim abufeseifes
ibrahim abufeseifes 2013-10-19
评论： Image Analyst 2013-10-22
i have chessboard image and i'm apply ones(31) filter for this image by using imfilter but the result is white image . can you help me to solve this error
this code used
%%%%%%%%%%%%%%%%%
g = imread('ch2.jpg');
h= rgb2gray(g);
w=ones(31);
gd=imfilter(h,w);
imshow(gd,[]) ;

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回答（2 个）

Premnath
Premnath 2013-10-19
编辑：Premnath 2013-10-19
I am unsure what you are trying to achieve. If you are using w=ones(31) as averaging filter. Then change your code as below
g = imread('ch2.jpg');
h= rgb2gray(g);
w=fspecial('average',31);
gd=imfilter(h,w);
imshow(gd) ;
Image Analyst
Image Analyst 2013-10-19
Cast h to double and it will work:
h = double(rgb2gray(g));

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