Related Experiment Video
Updated: Jul 7, 2026
08:47
Computer Vision-Based Biomass Estimation for Invasive Plants
Published on: February 9, 2024
Hybrid estimation of navigation parameters from aerial image sequence
1Department of Electronic Engineering, Sogang University, Seoul 100-611, Korea.
Summary
This study introduces a hybrid method for estimating aircraft navigation parameters from aerial images. The system effectively determines position and velocity for autonomous navigation.
Area of Science:
- Aerospace Engineering
- Computer Vision
- Robotics
Background:
- Autonomous navigation systems require accurate real-time position and velocity estimation.
- Sequential aerial imagery offers a rich data source for navigation parameter determination.
- Existing methods may face challenges in achieving robust and precise navigation parameter estimation.
Purpose of the Study:
- To develop and validate a hybrid method for aircraft navigation parameter estimation.
- To integrate relative and absolute position estimation techniques for enhanced accuracy.
- To demonstrate the effectiveness of the proposed algorithm using real aerial image sequences.
Main Methods:
- A hybrid approach combining relative and absolute position estimation techniques.
- Utilizing sequential aerial images as input for the navigation parameter estimation algorithm.
- Computer simulations were conducted to evaluate the algorithm's performance.
Main Results:
- The proposed hybrid method successfully estimated navigation parameters (position and velocity).
- The algorithm demonstrated effectiveness across two distinct sets of real aerial image sequences.
- Validation through computer simulations confirmed the algorithm's performance.
Conclusions:
- The hybrid navigation parameter estimation method is effective for autonomous aircraft navigation.
- The integration of relative and absolute estimation components enhances navigation accuracy.
- The algorithm shows promise for real-world applications in aerial autonomous systems.
Related Concept Videos
01:29Application of Linearization and Approximation
A drone flying through complex terrain often relies on more than one sensing method to estimate small changes in altitude. Along with direct measurements, air pressure provides a useful indirect indicator of vertical movement. Atmospheric pressure decreases as altitude increases, and this relationship is commonly described using an exponential model. Although accurate, converting pressure measurements into altitude values requires calculations that are too complex to perform repeatedly during...
01:30Vector Functions and Motion: Problem Solving
Accurate position tracking is fundamental to the safe and effective operation of unmanned aerial vehicles (UAVs), particularly during precision maneuvers near complex structures. In this scenario, a drone is programmed to perform a high-precision inspection of a vertical structure, starting at position ((x, y, z) = (3, 0, 0)), with an initial velocity oriented in the positive z-direction. The trajectory of the drone is governed by a time-dependent acceleration function a(t), which is predefined...
01:29Real-World Applications of Space Curves
Modern aerospace navigation depends on the accurate prediction of motion in three-dimensional space. In defense applications, radar systems continuously track both interceptors and moving aerial targets to find whether their flight paths will result in a collision. These motions are modeled mathematically as space curves, which represent paths that change continuously with time. Each object’s position is described by a vector function that specifies its location in terms of time-dependent...
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point served as...
01:29Vectors in 2D: Problem Solving
A plane traveling due north at 180 km/h in still air was found to be 80 km off-course after 30 minutes, deviating approximately 5 degrees east of north. This deviation means the influence of a crosswind alters the plane’s intended trajectory. The actual ground path formed a diagonal, suggesting that the aircraft’s effective ground speed was reduced to 160 km/h and directed slightly to the east due to the wind.By analyzing the displacement from the intended path, the velocity contributed by the...
01:26Integration Applied to Polar Coordinates to Find Arc Lengths
In polar coordinates, a plane curve is described by a radial distance r from a fixed point, called the pole, and an angle θ measured from a reference direction. This system is especially useful for paths that naturally involve rotation, such as an expanding spiral followed by a search drone. If the hiker’s last known position is treated as the pole, then the drone’s location at any instant can be represented by the polar equation r = f(θ), where the distance from the pole changes as the drone...