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From: Vladimir Vassilevsky on 22 Mar 2010 20:06


Greg Heath wrote:

> On Mar 22, 3:54 pm, maury <maury...(a)core.com> wrote:
>
>>On Mar 22, 2:44 pm, "sanam1" <sanamsingh(a)n_o_s_p_a_m.hotmail.com>
>>wrote:
>>
>>
>>>Hi. What are the alternatives we have to cross-correllation ?
>>>If I want to find degree to similarity between two sampled signals what
>>>options do I have besides doing the obvious correlation??
>>
>>>Thanks in advance
>>
>>Take a look at the amplitude magnitude difference function
>
>
> Any reasonable alternative measure should be between signals that are
> normalized for differences in scale and location.

Extend this to any affine transformations ?

VLV
From: sanam1 on 23 Mar 2010 02:29
Hi,
Thanks for your reply. Suppose if I have two signals and I correlate them
then I get degree of similarity between them. But my question is that I
want to achieve same result but with an operation other than correlation.
Hope I have made my question clear.
Regards,
Sanam


>sanam1 wrote:
>
>> Hi. What are the alternatives we have to cross-correllation ?
>> If I want to find degree to similarity between two sampled signals what
>> options do I have besides doing the obvious correlation??
>
>Define "similarity".
>Depending on this, there could be infinitely many ways to measure it.
>
>VLV
>
From: sanam1 on 23 Mar 2010 02:35
Hi,
How can I use affine transformation here??
>
>
>Greg Heath wrote:
>
>> On Mar 22, 3:54 pm, maury <maury...(a)core.com> wrote:
>>
>>>On Mar 22, 2:44 pm, "sanam1" <sanamsingh(a)n_o_s_p_a_m.hotmail.com>
>>>wrote:
>>>
>>>
>>>>Hi. What are the alternatives we have to cross-correllation ?
>>>>If I want to find degree to similarity between two sampled signals
what
>>>>options do I have besides doing the obvious correlation??
>>>
>>>>Thanks in advance
>>>
>>>Take a look at the amplitude magnitude difference function
>>
>>
>> Any reasonable alternative measure should be between signals that are
>> normalized for differences in scale and location.
>
>Extend this to any affine transformations ?
>
>VLV
>
From: HardySpicer on 23 Mar 2010 03:10
On Mar 23, 8:44 am, "sanam1" <sanamsingh(a)n_o_s_p_a_m.hotmail.com>
wrote:
> Hi. What are the alternatives we have to cross-correllation ?
> If I want to find degree to similarity between two sampled signals what
> options do I have besides doing the obvious correlation??
>
> Thanks in advance

You could shift one wrt the other, multiply and sum.
From: dvsarwate on 23 Mar 2010 08:18
On Mar 23, 2:10 am, HardySpicer <gyansor...(a)gmail.com> wrote:


>> You could shift one wrt the other, multiply and sum.


And what is the difference between this shift-multiply-sum
operation, by which you presumably mean something like

sum_{over all i} x[i]*y[i+k]

and the cross-correlation that the OP does not want?
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