imaging Archives - Agri-EPI Centre

Tag Archive for: imaging

Hyperspectral UAV

Agri-EPI Centre has invested in the Hyperspectral UAV.

Compared to multispectral imagery, hyperspectral imagery measures energy in narrower and more numerous bands, thus giving much more information on target. Hyperspectral image data is 3D cube, where each pixel holds a full spectrum across the range. Since spectra are as unique as ‘fingerprints’ to target, hyperspectral imagery can unveil features that multispectral imagery may miss out on.

Hyperspectral imaging technology has been under research for decades and has been demonstrated to be very powerful in many application areas including agriculture. Especially in recent years, with a more robust and rugged imaging product embedded onto the UAV platform, agri-tech has seen revolutionary improvements.

The HySpex turnkey UAV solution with Mjolnir VS-620 and Lidar includes all the necessary hardware and software for flight planning, data collection, data processing and calibration. The system is provided with a UAV platform, 3-axis gimbal mount for the hyperspectral unit with Lidar and corresponding spectral calibration, radiometric calibration and geometric calibration. The geometric calibration includes a sensor model for VNIR and SWIR hyperspectral sensor heads, subpixel co-alignment of the 2 sensor heads, boresight calibration of the 2 sensor heads and internal IMU system, boresight calibration of the Lidar unit and internal IMU system.

There’s a broad application potential, including assisting in the development of products in the following application areas:
• Drought/water/nutrient stress monitoring
• Plant pathogens detection
• Analysis of soil properties/Determination of soil types
• Land mapping
• Yield forecasting
• Land management

UAV System (XQ-1400S BFD HySpex Edition):
1. <25 kg MTOW with Mjolnir and gimbal
2. Up to 25 min flight endurance with 8 kg payload
3. Fitted with high performance GNSS/GPS and IMU to enable data to be captured to high geolocation accuracy
4. Fitted with advanced 3-axis digital gimbal to compensate for the pitching

Sensing System (HySpex Mjolnir VS-620, Velodyne VLP-32C) :
1. Fully-integrated co-aligned hyperspectral visible and near-infrared (VNIR) and short-wave infrared (SWIR) (400 – 2500nm) and LiDAR sensors, along with in-flight data capture and storage system
2. Spectral coverage of 400 – 2500 nm, with spectral resolution of 3 nm in VNIR and 5.1 nm over SWIR range. Bit resolution 12bit in VNIR and 16 bit in SWIR.
3. Double resolution data in the VNIR range
4. High-resolution (0.33 degree) LiDAR sensor, with 360° surround view with real-time 3D data

They Hyperspectral UAV has potential use as groundtruth technology for other technologies/systems as well.

For information on renting out our technical assets please contact

Multi-sensor VTOL UAV

Agri-tech has undergone tremendous improvements with the introduction of remote sensing technologies, making many agricultural properties that were difficult to achieve before now accessible.

Multi-Spectral imaging has been widely used on satellites (e.g. Landsat) for earth observation science at a global scale. In the agricultural domain, UAVs as a platform have played a major role utilising various payload sensors including multi-spectral imaging.

The advantage of multi-spectral imaging is that it extends human sight sensitivity beyond the visible spectrum. Some wavelengths that are widely recognised for applications, such as the normalised difference vegetative index (NDVI), can be deployed into multi-spectral imaging. Nonetheless, it has been proved to be very useful in many other fields, greatly empowering the advancement of agriculture. The adoption of UAVs has made it possible to achieve large-scale mapping and thus better agricultural management.

Agri-EPI Centre has invested in the Multi-spectral VTOL UAV which has a potential use as ground truth technology for other technologies and/or systems.

This UAV and sensing payload system can also be used for a variety of fruit orchard use-cases which include:
• Estimation of leaf area index
• Estimation of canopy volume
• Estimation of water stress
• Fruit biomass estimation
• Temperature variation across the orchard
• Temperature variation of specific plants over time
• Fruit count estimation

It can also be used in other agricultural areas which include:
• Pest infestation detection
• Quantity moisture levels
• Analyse wildlife damage
• Vegetation index creation like NDVI
• Crop counting
• Create 3D photogrammetry maps

For information on renting out our technical assets please contact