Done.
Julien
-------- Message transféré --------
Sujet : Re: Fwd: NoData values in otb?
Date : Mon, 15 Dec 2014 17:54:09 +0100
De : Agustin Lobo <[email protected]>
Pour : Julien Michel <[email protected]>
Thanks a lot for the fast answer. Do you mind sending it to the list
and we can discuss there?
Regards,
Agus
On Mon, Dec 15, 2014 at 2:51 PM, Julien Michel <[email protected]> wrote:
I am sorry I have been away for 2 weeks and I am catching up with my mails
just today. There is currently no way to handle no-data values at the OTB
level. Gdal is able to read/write a no-data property for datasets, but this
does not cope well with the general pipeline model in OTB (and ITK), as we
do not know what happen to no-data values when chaining several filters
(e.g. resampling for instance). As a result this is considered as an
application dependant parameter : some of our applications explicitely
handle no data value (which must be provided by the user as a parameter).
Regards,
Julien
Le 15/12/2014 10:21, Agustin Lobo a écrit :
Julien,
Do you know the answer to this question? I've searched the doc and
cannot find anything related to it.
Instead, I've found another user asking the same question in 2010! and
not getting any answer either...
http://otb-users.37221.n3.nabble.com/Defining-null-values-td986404.html
This is also a concern for the band math. For example, is there a
function to check if a pixel is null or nodata?
Thanks,
Agus
---------- Forwarded message ----------
From: Agustin Lobo <[email protected]>
Date: Mon, Dec 15, 2014 at 10:16 AM
Subject: Fwd: NoData values in otb?
To: Agustin Lobo <[email protected]>
---------- Forwarded message ----------
From: Agustin Lobo <[email protected]>
Date: Fri, Nov 28, 2014 at 12:16 PM
Subject: NoData values in otb?
To: [email protected]
I edit my previous message, as I mean No Data rather than Null values
On Thu, Nov 27, 2014 at 3:49 PM, Agustin Lobo <[email protected]>
wrote:
is there a way to define a NoData value in the images so that those
values
are ignored in the computations? In the case of FineRegistration it looks
like I get wrong results near the edges of the image because one of the
images
has null (which I represent as 0 in the tiff) values in one of the edges.
Is defining the NoData value in the tiff sufficient? I guess not
according to what I'm seeing, but i might be wrong.
Agus
--
--
Check the OTB FAQ at
http://www.orfeo-toolbox.org/FAQ.html
You received this message because you are subscribed to the Google
Groups "otb-users" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/otb-users?hl=en
---
You received this message because you are subscribed to the Google Groups "otb-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
