As the geospatial industry continues to evolve, so too does the software. Here’s a look at what’s new in ENVI 5.3, the latest release of the popular image analysis software from Exelis VIS.
- New data formats and sensors. ENVI 5.3 now provides support to read and display imagery from Deimos-2, DubaiSat-2, Pleiades-HR and Spot mosaic tiles, GeoPackage vectors, Google-formatted SkySat-2, and Sentinel-2.
- Spectral indices. In addition to the numerous indices already included in ENVI (more than 60), new options include the Normalized Difference Mud Index (NDMI) and Modified Normalized Difference Water Index (MNDWI).
- Atmospheric correction. The Quick Atmospheric Correction (QUAC) algorithm has been updated with the latest enhancements from Spectral Sciences, Inc. to help improve algorithm accuracy.
- Digital elevation model. Users can now download the GMTED2010 DEM (7.5 arc seconds resolution) from the Exelis VIS website for use in improving the accuracy of Image Registration using RPC Orthorectification and Auto Tie Point Generation.
- Point clouds. If you subscribe to the ENVI Photogrammetry Module (separate license from ENVI), then the Generate Point Clouds by Dense Image Matching tool is now available for generating 3D point clouds from GeoEye-1, IKONOS, Pleiades-1A, QuickBird, Spot-6, WorldView-1,-2 and -3, and the Digital Point Positioning Data Base (DPPDB).
- LiDAR. The ENVI LiDAR module has been merged with ENVI and can now be launched directly from within the ENVI interface.
- Geospatial PDF. Your views, including all currently displayed imagery, layers and annotations in those views, can now be exported directly to geospatial PDF files.
- Spatial subset. When selecting files to add to the workspace, the File Selection tool now includes options to subset files by raster, vector, region of interest or map coordinates.
- Regrid raster. Users can now regrid raster files to custom defined grids (geographic projection, pixel size, spatial extent and/or number of rows and columns).
- Programming. The latest ENVI release also includes dozens of new tasks, too numerous to list here, that can be utilized for developing custom user applications in ENVI and ENVI Services Engine.
To learn more about the above features and improvements, as well as many more, read the latest release notes or check out the ENVI help documentation.
Earlier this month Exelis Visual Information Solutions released ENVI 5.2, the latest version of their popular geospatial analysis software.
ENVI 5.2 includes a number of new image processing tools as well as various updates and improvements to current capabilities. We’ve already downloaded our copy and started working with the new features. Here’s a look at what’s included.
A few of the most exciting new additions to ENVI include the Spatiotemporal Analysis tools, Spectral Indices tool, Full Motion Video player, and improved integration with ArcGIS:
- Spatiotemporal Analysis. Just like the name sounds, this feature provides users the ability to analyze stacks of imagery through space and time. Most notably, tools are now available to build a raster series, where images are ordered sequentially by time, to reproject images from multiple sensors into a common projection and grid size, and to animate and export videos of these raster series.
- Spectral Indices. Expanding on the capabilities of the previous Vegetation Index Calculator, the new Spectral Indices tool includes 64 different indices, which in addition to analyzing vegetation can also be used to investigate geology, man-made features, burned areas and water. The tool conveniently selects only those indices that can be calculated for a given input image dependent on its spectral characteristics. So when you launch the tool you’ll only see those indices that can be calculated using your imagery.
- Full Motion Video. ENVI 5.2 now supports video, allowing users to not just play video, but also convert video files to time-enabled raster series and extract individual video frames for analysis using standard ENVI tools. Supported file formats include Skybox SkySat video, Adobe Flash Video and Shockwave Flash, Animated GIF, Apple Quicktime, Audio Video Interleaved, Google WebM Matroska, Matroska Video, Motion JPEG and JPEG2000, MPEG-1 Part 2, MPEG-2 Transport Stream, MPEG-2 Part 2, MPEG-4 Part 12 and MPEG-4 Part 14.
- Integration with ArcGIS. Originally introduced in ENVI 5.0, additional functionality has been added for ENVI to seamlessly interact with ArcGIS, including the ability to integrate analysis tools and image output layers in a concurrent session of ArcMap. For those working in both software domains, this helps simplify your geospatial workflows and more closely integrate your raster and vector analyses.
Other noteworthy additions in this ENVI release include:
- New data types. ENVI 5.2 now provides support to read and display imagery from AlSat-2A, Deimos-1, Gaofen-1, Proba-V S10, Proba-V S1, SkySat-1, WorldView-3, Ziyuan-1-02C and Ziyuan-3A, as well as data formats GRIB-1, GRIB-2, Multi-page TIFF and NetCDF-4.
- NNDiffuse Pan Sharpening. A new pan sharpening tool based on nearest neighbor diffusion has been added, which is multi-threaded for high-performance image processing.
- Scatter Plot Tool. The previous scatter plot tool has been updated and modernized, allowing users to dynamically switch bands, calculate spectral statistics, interact with ROIs, and generate density slices of the displayed spectral data.
- Raster Color Slice. This useful tool has also been updated, particularly from a performance perspective, providing dynamic updates in the image display according to parameter changes made in the tool.
For those interested in implementing ENVI in the cloud, the ENVI 5.2 release also marks the release of ENVI Services Engine 5.2 , which is an enterprise version of ENVI that facilitates on-demand, scalable, web-based image processing applications. As an example, HySpeed Computing is currently developing a prototype implementation of ESE for processing hyperspectral imagery from the HICO sensor on the International Space Station. The HICO Image Processing System will soon be publically available for testing and evaluation by the community. A link to access the system will be provided on our website once it is released.
To learn about the above features, and many more not listed here, see the video from Exelis VIS and/or read the latest release notes on ENVI 5.2.
We’re excited to put the new tools to work. How about you?