TIFF image substraction operation from with LAStools

[Bernardino J. Buenaobra]

Hello Group:

For purposes of exercise and test if this is going to work lets say we have a first return only LAS to a TIFF (say frDSM.tif) via las2dem or lasgrid and then another say for a last return LAS to TIFF same as before via las2dem or lasgrid (say lrDSM.tif).
I would like to be able to see the resulting image TIFF so that essentially I perform the operation ddDSM=frDSM.tiff - lrDSM.tiff (say a difference) would that be possible without me doing it in Matlab outside LAStools? Any suggestions?

---
Bernardino (Berns) Jerez Buenaobra
Senior Science Research Specialist
Data Processing Component
USC DOST-UP/NEC Project LiDAR (Light Detection and Ranging)
for Disaster Risk Exposure Assessment for Mitigation (DREAM)
2F J.Baumgartner Bldg.,Learning Resource Center (LRC)
University of San Carlos(Talamban Campus)
Nasipit Rd.,Talamban, Cebu City
Philippines 6000
Contact information:
Mobile: +639479582261
Office: +63322300100 local 188-190
Google+ berns.b...@gmail.com
Skype ID: poormanphysics
Professional Reference, Research and Education link:
http://ph.linkedin.com/pub/bernardino-buenaobra/16/42/637
________________________________

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[Melanie Luck-Vogel]

Hi Bernardino,

 

the subtraction of two tiff images is very easy in any remote sensing or GIS software.

 

In case that you don't have access to e.g. ENVI, ERDAS or ArcMap or any other commercial software, you could also try it in QGIS, which is a free open source software.

 

Regards

Melanie

Dr Melanie Lück-Vogel

Senior Researcher Remote Sensing

Coastal Systems Research Group

Natural Resources and the Environment

CSIR

P.O. Box 320, Stellenbosch, 7599
11 Jan Cilliers Street, Stellenbosch, 7600

South Africa

+27 21 888 2412             (Office)
+27 21 888 2693             (Fax)

mluck...@csir.co.za    (email)

 

http://www.csir.co.za

>>> "Bernardino J. Buenaobra" <bjbue...@usc.edu.ph> 01/10/2015 08:26 >>>

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[Bernardino J. Buenaobra]

Hi Dr.Melanie:

Thanks for the suggestion I know it could be done by that too but if this is some few parts of a long script I'd like to build in Windows CMD or in Python also again I wanted it to be in context
of a "pure" LAStool processing approach.

Regards,
Berns B.

---
Bernardino (Berns) Jerez Buenaobra
Senior Science Research Specialist
Data Processing Component
USC DOST-UP/NEC Project LiDAR (Light Detection and Ranging)
for Disaster Risk Exposure Assessment for Mitigation (DREAM)
2F J.Baumgartner Bldg.,Learning Resource Center (LRC)
University of San Carlos(Talamban Campus)
Nasipit Rd.,Talamban, Cebu City
Philippines 6000
Contact information:
Mobile: +639479582261
Office: +63322300100 local 188-190
Google+ berns.b...@gmail.com
Skype ID: poormanphysics
Professional Reference, Research and Education link:
http://ph.linkedin.com/pub/bernardino-buenaobra/16/42/637

________________________________________
From: Melanie Luck-Vogel [MLuck...@csir.co.za]
Sent: Thursday, October 01, 2015 3:51 PM
To: LAStools - efficient tools for LiDAR processing
Subject: Re: [LAStools] TIFF image substraction operation from with LAStools

Hi Bernardino,

the subtraction of two tiff images is very easy in any remote sensing or GIS software.

In case that you don't have access to e.g. ENVI, ERDAS or ArcMap or any other commercial software, you could also try it in QGIS, which is a free open source software.

Regards
Melanie

Dr Melanie Lück-Vogel

Senior Researcher Remote Sensing
Coastal Systems Research Group
Natural Resources and the Environment
CSIR

P.O. Box 320, Stellenbosch, 7599
11 Jan Cilliers Street, Stellenbosch, 7600
South Africa

+27 21 888 2412 (Office)
+27 21 888 2693 (Fax)

mluck...@csir.co.za<mailto:mluck...@csir.co.za> (email)

http://www.csir.co.za<http://www.csir.co.za/>

This message has been scanned for viruses and dangerous content by MailScanner<http://www.mailscanner.info/>,

and is believed to be clean.

Please consider the environment before printing this email.

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Download LAStools at
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[Martin Isenburg]

Hello,

I suggest using GDAL or GRASS that will allow you to script together point processing of LAStools with raster processing in a single batch file. I find that especially GDAL makes a great companion to do all kind of raster magic with the results produced by LAStools ...

Martin @rapidlasso