The IVyTools is a Python application which provides an end-to-end workflow support for the processing of video and imagery into water velocity and streamflow measurements. IVyTools uses Space-Time Image Velocimetry to compute water surface velocity from sequences of images.
The latest release can be downloaded here.
The change log and links to releases can be viewed here.
Bugs and enhancement requests can be reported here.
Details on how to contribute can be viewed here.
Suggested Citation: Engel, F. L., and Knight, T. 2025. Image Velocimetry Tools (IVyTools): U.S. Geological Software Release, https://doi.org/10.5066/P1KMVCNY.
- Frank L. Engel, Ph.D. (ideation, primary development)
- Travis Knight (AreaComp, cross-section engine)
- Carl Legleiter (STIV Core, PIV Core)
- Chris MacPherson (Testing, Review)
- Paul Kinzel (Testing)
- Matt Gyves (Testing)
- John Fulton (Testing)
- Russ Lotspeich (Testing)
- Students in the U.S. Geological Survey (USGS), Water Mission Area Hydrologic—Remote Sensing Branch sponsored Non-contact classes (Testing)
- IVyTools will be available to USGS users through WFAST to registered computers. Internal USGS users with computers not registered in WFAST can download the software from the IVyTools repository at the link in the table above.
- No installation is required to use the software, however the LAVFilters codec is required to enable video playback. See the Installation instructions in the Release Notes for more information.
- To run the application, extract the contents from the downloaded
.zipfile into a folder of the user's choice. - The
.zipfile includes a user guide that contains detailed instructions on IVyTools's features and an executable to run the application.
IVyTools is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The software has not received final approval by the U.S. Geological Survey (USGS). No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the software and related material nor shall the fact of release constitute any such warranty. The software is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the software.
Instructions on setting up the IVyTools environment and running from source can be found here.
This table contains extra information about the publication that cannot be found elsewhere on the page.
| Publication Type | Python module |
|---|---|
| DOI | 10.5066/P1KMVCNY |
| Year published | 2025 |
| Year of version | 2025 |
| Version | 1.0.0.0 |
| IPDS | IP-173457 |