Image Stitching Tutorial Part #2: Direct Georeferencing

What is Direct Georeferencing?

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The process of mapping a pixel in an image to a real world latitude, longitude, and altitude is called georeferencing.  When UAS flight data is tightly integrated with the camera and imagery data, the aerial imagery can be directly placed and oriented on a map.   Any image feature can be directly located.  All of this can be done without needing to feature detect, feature match, and image stitch.  The promise of “direct georeferencing” is the ability to provide useful maps and actionable data immediately after the conclusion of a flight.

Typically a collection of overlapping images …
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Image Stitching Tutorial Part #1: Introduction

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Background

During the summer of 2014 I began investigating image stitching techniques and technologies for a NOAA sponsored UAS marine survey project.  In the summer of 2015 I was hired by the University of Minnesota Department of Aerospace Engineering and Mechanics to work on a Precision Agriculture project that also involves UAS’s and aerial image stitching.

Over the past few months I have developed a functional open-source image stitching pipeline written in python and opencv.  It is my intention with this series of blog postings to introduce this work and further explain our approach to aerial image processing and stitching.…
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Flight Milestones

Congratulations!

Congrats ATI Resolution 3, Hobby Lobby Senior Telemaster, Hobbyking Skywalker, and Avior-lite autopilot on your recent milestones!

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Avior-lite (beaglebone + apm2 hybrid) autopilot:

  • 300th logged flight
  • 7000+ logged flight minutes (117.8 hours)
  • 6400+ fully autonomous flight minutes (107.2 hours)
  • 2895 nautical miles flown (3332 miles, 5362 km)

Hobby Lobby Senior Telemaster (8′ wing span)

  • Actively flight testing autopilot hardware and software changes since 2007!
  • 200th logged flight.
  • 5013 logged flight minutes (83.5 hours)
  • 4724 fully autonomous flight minutes (78.7 hours)
  • 2015 nautical miles flown (2319 miles, 3733 km)

Today (October 7, 2015) I logged the 300th avior-lite flight and …
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