Quantitative use of satellite SAR imagery of sea ice
An automatic technique to obtain ice motion based on maximizing cross-correlation and employing a strategy of nested calculations has been developed and used to obtain displacements of more than 2000 tie-points on a 2 km mesh grid. The mean displacement error is 250 m and is as low as manual data er...
| Main Authors: | , |
|---|---|
| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
1987
|
| Subjects: | |
| Online Access: | http://ntrs.nasa.gov/search.jsp?R=19880040612 |
| Summary: | An automatic technique to obtain ice motion based on maximizing cross-correlation and employing a strategy of nested calculations has been developed and used to obtain displacements of more than 2000 tie-points on a 2 km mesh grid. The mean displacement error is 250 m and is as low as manual data error of 150 m on rigid pieces. The method allows tie-points to be found on a regular grid in a fully automatic fashion. Full resolution data are not needed to maximize the accuracy of displacement measurements, a result which is significant for SAR images, with their large amounts of data. |
|---|