HART
High Accuracy Registration Technique
HART is a set of software functions and APIs that perform completely automated registration (triangulation) of images to/with other images or
reference images. HART consists of software products for the import of images, automatic registration, and the export of adjusted support data for those
images. HART can be purchased as a turn key product for Solaris and Windows. HART can also be integrated into vendor software using the API.
HART is ideal for updating new images automatically to reference imagery or to adjust multiple images for improved accuracy of subsequent product generation. HART can automatically orient new images over time for sensor fusion mapping applications.
HART image matcher
The HART image matcher uses edges of imaged objects combined with statistical scoring to find conjugate points (tie points) between images. The searching and matching process is driven by input image modalities and error characteristics. The matcher is extremely robust at handling difficult image matching conditions including SAR-EO-IR modality variations, seasonal changes, snow, and other disparities, with regard to illumination or time of acquisition. The robustness of the HART matcher results in high success rates even with very seasonally or modality driven differences in the images.
Optimal image adjustment
The tie points from the matcher are processed together with sensor models, sensor adjustable parameters and their accuracies in a combined fully weighted least squares process to find the optimal parameter adjustments for the output images. This robust photogrammetric process results in accuracy estimation for the resulting images. Error propagation and health checks permit excellent knowledge of adjustment quality and success.
Input Image types
HART accepts a variety of image formats and support data inputs including NITF, and images imported with SOCET SET and SOCET GXP. The combination of SOCET SET and JTW software libraries permit the use of over 40 sensor models, including commercial, tactical, and satellite sensors.
Output support data
HART produces updated support data for the images, such as RPCs and RSM in NITF format, as well as other rigorous support data in SOCET SET and JTW formats. HART also outputs health checks and detailed reports, including adjusted ground coordinates of all tie points along with their absolute and relative accuracy information.