Downsampling of an Image

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jeyapreetha

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Hai Friends,
I'm havin a doubt n downsampling of an image using Quincunx matrix. In one IEEE paper I have read that when downsampling of an image using Quincunx matrix the resultant image is downsampled and rotated by 45 degrees. I got the downsampled image,but it didn't get rotated. Plz anybody give me the procedure especially for Quincunx downsampling.
Thanks in advance.
 


I am also having the same doubt... how come u did the downsampling by quincunx matrix? like Q=[1 -1; 1 1] right.. so how u did that, based on the image size. have to do down sampling for row as well as column..how will it do? if u can , will u give me some examples....
 
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