mathematical function in matlab

hello,

i want to compute a feature for image processing that uses coefficients from the haar wavelet and has this form :

and the coefficients are :

i have the coefficients but i am not very good at math.Can someone help me with this?

[Geoff Hayes]

harrison - what are j, k and l in the above equation?

[harrison]

they are not mentioned somewhere else in this paper. I believe that they are counters.something like this C11 , C12 , C22 , C33 .

[Geoff Hayes]

Harrison - okay... Are you sure that the above equation is correct? Why do both sums iterate over i? Should one be a j?

[harrison]

i am very sorry Geoff i made a mistake the second one is j.I double checked everything now and this was the only mistake.Sorry again.

[Geoff Hayes]

That's fine..still unclear on what k and l are though. In the above, you are asked to compute f. Since you have two sums, you start with the first, so i equals to zero, and compute the inner sum where you just square the two coefficients and sum them together. These coefficients would be C(k,l) and C(k,l+1) for j equals to zero and j equals to one respectively. You then repeat this for i equals to one and sum the result with that which you found for i equals to zero. The remaining operations should then be clear.

[harrison]

sorry that i couldn't tell you more info.Thanks for your time Geoff.