Rotation of time series

Thread View: comp.soft-sys.matlab

2 messages

[T] Back to Threads [V] Tree View [G] Group Articles

2 total messages Started by David Page Fri, 18 May 2001 05:29

#147

Author: David Page
Date: Fri, 18 May 2001 05:29

11 lines
1459 bytes

Hi All,

Its been a general problem in Image processing that the algorithms should be
rotational invariant. However time series are considered objects in one
dimension.

Does anybody have any ideas on what can be the physical interpretation of
rotation of a time series by a certain angle?

Thanks,
David.

Re: Rotation of time series

#148

Author: Jordan Rosenthal
Date: Fri, 18 May 2001 13:21

32 lines
2235 bytes

David,

Huh?  If it is truly a one dimensional signal, then there is no
interpretation of a rotation, at least not in the conventional sense.

I guess, however, you could embed the time-series along a line in a higher
dimensional space.  So, for example, the time series could a particular row
of an image that can then be rotated to lie in a different direction.  Or
perhaps the time signal can be transformed into a different higher
dimensional space (e.g., time-frequency), rotated in this space, and then
transformed back.

Where did this come up?

Jordan

"David Page" <david@REMOVE_SPAM.imhost.com> wrote in message
news:Zq2N6.95550$2U.44352545@news2.rdc2.tx.home.com...
> Hi All,
>
> Its been a general problem in Image processing that the algorithms should
be
> rotational invariant. However time series are considered objects in one
> dimension.
>
> Does anybody have any ideas on what can be the physical interpretation of
> rotation of a time series by a certain angle?
>
> Thanks,
> David.
>
>

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads