yuna
Joined: 27 Sep 2006
Posts: 13
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 13 Oct 2006 4:47 Discrete cosine transform DCT (urgent) |
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Dear all,
I am doing the palm print recognition.May i know is it somebody know how to calculate the DCT of the image?
i have try a few method....in the MATLAB..
i use the DCT or DCT2 in MATLAB but the result is not good....
I hope somebody can help me...
My source code is as below....I have try 3 method to calculate the DCT of image...
DCTfm1 = dct2(I);
max(max(DCTfm1))
min(min(DCTfm1))
ans =
18.0219
ans =
-6.2640
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logofDCT = log(DCTfm1);
max(max(logofDCT))
min(min(logofDCT))
ans =
-13.8896 + 3.1416i
ans =
-1.4010
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a = I;
b=im2col(a,[8 8],'distinct');
mean(b);
max(b);
a1=mean(b)./max(b);
[max_a1,k] = max(a1)
max_a1 =
0.2985
k =
87
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I want to ask whether which method above is better to used in the propagation of neural network.?May be i did wrong in my source code.....please guide me...
If you have any source code or file which related with the DCT or neural network, please e-mail to me....
yuna_free(at)yahoo.com
Please.............. i really hope somebody can guide me...
Thanks in advance.....
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