otb-users Google Group

One-class SVM from GUI

hanlie.pretor...@gmail.com (ping) — Fri, 06 Nov 2009 11:22:08 UT

Hi,

I received the Orfeo Toolbox at IGARSS 2009 and I would like to use
its SVM classifier to detect a single species of vegetation in a
colour infrared aerial photograph.

I launched the supervised classification GUI application and selected
the following:

- one-class SVM

- kernel = RBF

Re: OTB-App installation

emmanuel.christo...@gmail.com (Emmanuel Christophe) — Fri, 06 Nov 2009 03:37:22 UT

Hi Boris,
That shouldn't have been deleted. This is back now, it should be able
to compile. Thanks for informing us!

Btw, you shouldn't have to use sudo for the 'hg clone'.

If you are interested in the OTB Applications, you might want to try:
hg clone [link]

DEM directory - check files

lomba...@consorzio-innova.it (nunzialombardi) — Thu, 05 Nov 2009 09:30:02 UT

I have a directory containing some DEM files.
How can I chek if in the given directory exists a DEM file which
covers a desired geographic zone?
Many thanks in advance

Filters I want to show in the images.

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Tue, 03 Nov 2009 09:50:18 UT

I would like to be able to show the result of this filter in an output
image:

00164 typedef
otb::SpectralAngleDistanceImag eFilter<MultiSpectralImageType ,
00165 InternalImageType> SAFilterType;
00166 SAFilterType::Pointer saFilter = SAFilterType::New();
00167 saFilter->SetReferencePixel(pi xelRef);

RoadExtraction by Steps.

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Mon, 02 Nov 2009 16:40:27 UT

I am now modifying the road Extraction by steps example. What I'm
trying to do is to modify the example so after the application of each
filter, I generate an image with the effect of the filter in the
image. Is that possible for all the filters in the application? and
secondly, how can that be done, i've tried putting these lines instead

swimming pools

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Thu, 29 Oct 2009 10:03:33 UT

Conrad suggested that I use the blue channel in the quickbird image
to identify swimming pools. How do I separate the quickbird image in
the 4 spectral bands, and how do I obtain each channel, using some of
the filters supplied by otb?

Problems after last sync with OSSIM

antonio.valent...@tiscali.it (Antonio Valentino) — Wed, 28 Oct 2009 13:10:15 UT

Hi list,
I'm experimenting some problem a with sensor models after last sync
with OSSIM.
E.g. the otbOrthoRectif program stopped working on ENVISAT data:
$ otbOrthoRectif -in
ASA_IMP_1PNUPA20060202_062233_ 000000152044_00435_20529_3110. N1 -out
ASA_IMP_utm.tif -mapProj UTM 40 N -xUL 303750 -yUL 2784640 -xSize 500

LinkPathFilter.

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Wed, 28 Oct 2009 10:28:43 UT

After looking at many images yesterday, we found that there is room
for improvement in this filter. What i've seen is that although it
works well in many situations, in some it exhibits a random character.
Any ideas, or scientific articles about the best way of linking
vertices?

The last question for today.

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Tue, 27 Oct 2009 15:38:06 UT

in the road extraction application-what does the distance threshold
parameter mean?

Trying to use the otb feature extraction

phu...@gmail.com (Phumzile) — Tue, 27 Oct 2009 14:33:32 UT

Hi all
I am working on a project to identify informal settlements in
quickbird images. I looked at the possibility of using the road
networks as one of the identifying features of informal settlements. I
have thus looked at the road extraction application, tested it on
several pictures to assess its performance. I am now trying to include

Problems with Road extraction.

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Tue, 27 Oct 2009 12:33:06 UT

We are still trying to understand how the RoadAplication links paths.
We have found unexpectedly that the application fails to link a simple
straight road-we are using .bmp single channel images-
a road like this
------------------------------ ------------------------------ ------------------------------ -

Suggestions for detection of double roads.

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Mon, 26 Oct 2009 10:56:39 UT

Which filter, in the AddRoadExtractionByExample, is responsible for
controlling the size of road width? , and which filter do you suggest
to me to modify if I want to detect highways, that is, for example, in
Spain, A-6, or in England M-5, that is roads with more than 3 lanes?

RoadExtraction application

andresruizdeelv...@gmail.com (AndresRuizDeElvira) — Mon, 26 Oct 2009 08:33:01 UT

On Friday, I spent quite a lot time working with the windows
application for road extraction. I found that by tuning some of the
parameters of the filters, I got very good results on simple .bmp
images, without using the spectral angle. I used the option for the
selection of channel, and I selected Channel 1. I am using this trick,

Severino Fernandez Alvarez está ausente de la oficina.

fde...@inta.es (Severino Fernández Álvarez) — Sun, 25 Oct 2009 21:01:23 UT

Estaré ausente de la oficina desde el Sáb 24/10/2009 y no volveré hasta el
Mar 03/11/2009 .
Responderé a su mensaje cuando regrese.
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IMPORTANT: The contents of this email and any attachments are confidential. They are intended for the

Image rotation

adamo.fe...@gmail.com (Adamo Ferro) — Thu, 22 Oct 2009 15:11:32 UT

Hi everybody!

I'm trying to understand how transformations work... in particular I
would like to rotate an image by a given angle.

I wrote the following piece of code (derived by reading the examples
for registration), but I get an image only when the angle (parameters
[0]) is equal to 0... if not every pixel is set to the