Hi,
There are usually two steps in pan-sharpening : first, you resample the
XS image to the resolution and sampling grid of the P image, and then
you perform the fusion operation using a pixel or neighborhood operator.
The Pansharpening application only applies the latter.
Regards,
Julien
Le 03/03/2015 17:03, Ned Horning a écrit :
Hi Julien,
Thanks for the very fast reply. I don't understand your response. I
thought pan sharpening used high-resolution panchromatic and lower
resolution multispectral bands in which case the spacing would have to
be different. In my case the origins for the Pan and MS images are the
same but the pan spacing is 1.5m and the MS spacing is 6m. I have a
feeling I'm missing something simple but it's not clear to me.
Ned
On 03/03/2015 10:56 AM, Julien Michel wrote:
Dear Ned,
The answer is more simple : the pansharpening application expect
registered images (i.e. spacing and origin must match). If you want
an application that includes registration/resampling, have a look at
BundleToPerfectSensor. You can also performa a Superimpose beforehand.
Regards,
Julien
Le 03/03/2015 16:54, Ned Horning a écrit :
Hi all -
I am trying to use Pansharpening through the OTB Applications
browser in Monteverdi 2 0.8.0 on Ubuntu 12.04 and am getting an
error when I try to fuse Pan (1.5m) and MS (6m) SPOT 6 image bands.
The error message is:
--
Inputs do not occupy the same physical space!
InputImage Origin: [8.5232700e+05, 7.9139910e+06], InputImage_1
Origin: [8.5232475e+05, 7.9139932e+06]
Tolerance: 6.0000000e-06
InputImage Spacing: [6.0000000e+00, -6.0000000e+00], InputImage_1
Spacing: [1.5000000e+00, -1.5000000e+00]
Tolerance: 6.0000000e-06
--
I have a feeling this is caused by a conflict between the image
origin being defined by the pixel center or corner and perhaps a
rounding error. Here is a table of the X/Y coordinates using the
coordinates for the upper left pixel reported by gdalinfo and the
error message from OTB Pansharpening
--
Pan image
gdalinfo OTB Difference
852324 852324.75 -.75
7913994 7913993.20 .80
MS image
gdalinfo OTB Difference
852324 852327.00 -3.00
7913994 7913991.00 3.00
--
The output from gdalinfo lists "AREA_OR_POINT=Area" and in that case
I think the upper left corner of the pixel should be used as a
reference. If AREA_OR_POINT=Point the the center of the pixel would
be used - at least that is my understanding.
I also see there is a "Tolerance" in the OTB error output. For some
reason the difference between the gdalinfo and OTB Y coordinate for
the Pan image is 0.8 and it should be 0.75 is it is for the X
coordinate. Maybe this is the problem? Is it a rounding error?
Anyway, if anyone has suggestions about how I should deal with this
please let me know.
All the best,
Ned
--
--
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]
<mailto:[email protected]>.
For more options, visit https://groups.google.com/d/optout.
--
Julien MICHEL
CNES - DCT/SI/AP - BPI 1219
18, avenue Edouard Belin
31401 Toulouse Cedex 09 - France
Tel: +33 561 282 894 - Fax: +33 561 283 109
--
--
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]
<mailto:[email protected]>.
For more options, visit https://groups.google.com/d/optout.
--
--
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]
<mailto:[email protected]>.
For more options, visit https://groups.google.com/d/optout.
--
Julien MICHEL
CNES - DCT/SI/AP - BPI 1219
18, avenue Edouard Belin
31401 Toulouse Cedex 09 - France
Tel: +33 561 282 894 - Fax: +33 561 283 109
--
--
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.
