What is the reason for the low orthophoto quality and complexity in processing UAV images?
Hello dear researchers
I have a number of drone images that I processed several times with Agisoft photoscan software (in different qualities). But when I take an orthophoto and zoom in, the crowns of the trees get complicated.
I also picked up the control points with a DGPS. But the problem was not solved.
The images were taken with ebee drone(fixed wing) and at a height of 110 meters with 70% overlap. The study area is also a broadleaf forest.
Thank you for your help
This study presents the first high-resolution orthophoto maps and digital surface ... This study demonstrates that small and low-cost UAVs can be ... fog or just strong wind gusts, which could cause oblique and blurred images.
Article Positional Quality Assessment of Orthophotos Obtained from S...
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The reasons:
1.Incorrectly selected parameters of aerial photography
2. Meteorological conditions (wind, lighting, etc.)
3. Insufficient accuracy of identification and determination of coordinates and height of marks
4. Low quality software
Dear Mohammadhassan Naseri,
One of the main causes of the low quality of orthophotographs and the complexity of processing UAV images are the metrological conditions and mainly the wind and its speed ... To be able to overcome these disturbances, i suggest you to see links and attached files on topic.
http://www.50northspatial.org/uav-image-processing-software-photogrammetry/
Article A Robust Photogrammetric Processing Method of Low-Altitude UAV Images
Article True-orthophoto generation from UAV images: Implementation o...
Article The Processing of Image Data Collected by Light UAV Systems ...
Best regards