An interesting use of the data from GeoCam is to see how stitching algorithms are performing with data from our balloon flight. An algorithm developed by Matthew Brown does this automatically through the comparison of SIFT points and a RANSAC algorithm determining good fit. The software is available at the AutoStitch web page.
We first tried stitching five photos together and obtained a reduced file (200 KB as opposed to 5 times 3.2 MB)
We then went on using about 100-200 frames per panoramas and obtained the following views:
It seems evident that the payload wasn't turning at 1 rpm.
One of the apparent issues seems to be that the comparison for overlap between frames was based on cues from the clouds. Since we took photos at intervals of about 23 seconds, some of these clouds changed location and eventually allowed for some of the panoramas to be unduly stretched.
Saturday, September 30, 2006
Posted by Igor at 4:16 AM