Rapidly Making Colorful Landsat-8 Imagery Composite with Free Advanced Image Stretching
and Pan-sharpening Software from GeoSage
Sydney, Australia – 17 June 2013:
Latest high-quality Landsat-8 satellite imagery freely available from the U.S. Geological Survey (USGS)
provides enormous potential for innovation and applications. There is a great demand for new software
tools that can analyze the imagery in a straightforward way.
Currently, while there are many image processing software tools on the market, very few can quickly
make beautiful, detail-rich imagery composites with adaptive image stretching and advanced image pansharpening.
One may spend hours to produce something that ought to be handy in the first place. For
many GIS users, it is often hard to find right capable tools (i.e. band combination, image stretching and
pan-sharpening) in GIS packages. And for casual users and the general public, dedicated tools to process
the vast Landsat imagery archive are lacking.
GeoSage is pleased to release Spectral Transformer tool sets for Landsat-8 imagery to fill in this gap.
The standalone tools are powerful and easy to use, and perform three steps of analyses:
Step 1: Simple band combination to make three-band imagery composite
Step 2: Adaptive linear and non-linear image stretching to make colorful imagery composite
Step 3: Advanced and fast image pan-sharpening to make spatially sharper and colorful
The tools specifically target Landsat-8 imagery in GeoTIFF format directly downloaded from the USGS
Landsat-8 distribution portals, e.g. GloVis. The processed (stretched and pan-sharpened) imagery at
30m- and 15-mresolution in GeoTIFF format can be readily used in all GIS and mapping platforms (e.g.
ArcGIS, MapInfo and Google Earth)
Landsat-8 captures about 400 scenes per day. The U.S. Geological Survey (USGS) distributes Landsat-8 data in three very accessible ways:
- Browse and download data – GloVis – http://glovis.usgs.gov demo
- Search and bulk-download data – EarthExplorer – http://earthexplorer.usgs.gov useful tutorial
- View and get colour images – LandsatLook Viewer – http://landsatlook.usgs.gov
The USGS Landsat portal also provides comprehensive FAQs in relation to the new Landsat-8 imagery and its comparison with the previous Landsat series. It is important to read these before conducting proper image processing. Landsat-8 products are delivered as 16-bit images with the panchromatic band at 15m resolution and multispectral bands at 30m resolution, and band combinations are unique (e.g. bands 4/3/2 refer to red/green/blue, respectively).
New analysis tools
While the imagery source is magnificent, more work needs to be progressed on how to use the imagery in a straightforward way.
- There are many remote sensing and image processing software tools on the market, but it is fair to say that very few can efficiently make beautiful, detail-rich imagery composites with adaptive image histogram stretching and advanced image pan-sharpening. One may spend hours to produce something that is of high quality.
- For many GIS users, it is often hard to find right capable tools (i.e. band combination, image stretching and image pan-sharpening) in GIS software packages.
- And for casual users and the general public, dedicated tools to process the vast Landsat imagery archive are lacking.
Spectral Transformer tools for Landsat-8 imagery fill in this gap.
Standalone tool set performs three steps of analyses:
- Step 1 – Band combination (to make three-band imagery composite)
- Step 2 – Image histogram stretching (to make colourful composite)
- Step 3 – Image pan-sharpening (to make spatially sharper and colourful composite)
We believe these tools are very useful for a wide range of users who are interested in analysing the Landsat-8 imagery.
– See more at: http://www.geosage.com/highview/features_landsat8.html#sthash.kdWHEbQs.dpuf