Hi Pete and John,
Thanks for your helps. I have only converted a couple of test scans to spd
files. Now I'm using spdlib in python to convert all envi cubes to spd
files. I assume I need to download the new code file and rebuild spdlid on
my system? Also it seems when I'm creating the spd file with
SPDPySeqWriter, it takes care of the quick look image generation and I
don't have to worry about it by myself? Once I use the new code that uses
waveform maximum intensities, I should be able to see a valid quick look
image instead of all pixels of one. Is it right? I'm still on a learning
curve here. Thanks for any help.
Zhan.
On Mon, Jun 9, 2014 at 4:33 PM, Pete Bunting [pfb] <[email protected]> wrote:
> Hi John,
>
> Sounds good to me, I should have probably done that to begin with. Go
> ahead and commit it.
>
> Zhan, once John has committed the updated you will have to re-build your
> files - spdcopy or spdtranslate should do it - as the quicklook image is
> created as the file is written to the disk.
>
> Cheers, Pete
>
> ****************************************************
> * Dr Pete Bunting
> * Senior Lecturer in Remote Sensing
> * Earth Observation and Ecosystem Dynamics Group
> * Department of Geography and Earth Sciences
> * Aberystwyth University
> * Aberystwyth
> * Ceredigion
> * SY23 3DB
> * UK
> *
> * Ph: +44 (0) 1970 622615
> * Mob: +44 (0) 7917 842743
> * Email: [email protected]
> * ORCID: http://orcid.org/0000-0002-7435-0148
> ****************************************************
>
> On 9 Jun 2014, at 19:21, ARMSTON John <
> [email protected]> wrote:
>
> > Hi Zhan,
> >
> > Agree that maximum intensity is a better general choice for waveforms,
> for the Reigl as well.
> >
> > The quicklook generation code does not have configurable options.
> Easiest solution is to just change it to maximum.
> > Pete - you have any objections to this? I've changed the source code
> (SPDFileWrite.cpp) - so will commit if not.
> >
> > cheers,
> > John.
> >
> > From: Zhan Li [mailto:[email protected]]
> > Sent: Sunday, 8 June 2014 8:13 AM
> > To: [email protected]
> > Subject: [spdlib-develop] Use pulse maximum intensity to create quick
> look image
> >
> > Hi,
> >
> > After I created a spd file from ENVI data cube with a python file and
> inspected it as an HDF5 file with Matlab's hdf5 functions, the quick look
> image is not right. All the pixel values are simply 1. How should I create
> the quick look image with python bindings of spdlib?
> >
> > Also in Pete's paper in Computers & Geosciences it mentions the quick
> look image is the mean waveform intensity if only pulse data is stored.
> However for our pulse data, the mean image is not good due to high
> background noise level. The maximum intensity is a better choice. Can I ask
> the spdlib to create the quick look image with maximum intensity instead of
> default mean intensity?
> >
> > Thanks,
> >
> > Zhan.
> >
> > --
> > Zhan Li, 李展;
> > Earth & Environment, Boston University, USA;
> >
> > 2008 - 2011, in Chinese Academy of Sciences, China;
> > 2004 - 2008, in Nanjing University, China;
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--
Zhan Li, 李展;
Earth & Environment, Boston University, USA;
2008 - 2011, in Chinese Academy of Sciences, China;
2004 - 2008, in Nanjing University, China;
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