Drone capture is a technique used to capture high-resolution aerial imagery of an area or asset, which can then be used to generate 3D models. Drones are equipped with cameras and sensors and by capturing photos and data from different angles and heights can then be processed using photogrammetry software to generate a 3D model.

The below 6 steps will help you to get started with capturing drone imagery to generate quality 3D models:

The quality of the data you use will have a significant impact on the accuracy and quality of your 3D model. Make sure to use high-resolution images (proximity to structure) and where possible accurate measurements (Ground Control Points) to create a high-quality model.

Proper lighting is important for capturing high-quality data, especially for photogrammetry. Use natural lighting to avoid overexposure, underexposure, or shadows that can cause inaccuracies in the model. If there is vegetation in your area of interest ensure low wind conditions to reduce movement in the vegetation.

Nadir imagery means that the camera or sensor is pointed directly at the ground, creating an image that looks as if it was taken from directly overhead. The recommended flight height is around 150-200 feet. This flight height will vary depending on the quality of the model you require and the size of surrounding obstacles.

Oblique imagery needs to be captured in addition to nadir imagery and it is captured from an angled perspective which means circling the structure at different angles and heights to get the best coverage.

You will want to ensure that the target area is always in frame when flying the radius of your capture area. The angle of the camera or sensor would depend on the specific application and the site being captured.

For example, oblique imagery could be captured at an angle to capture the facades of buildings or other structures, and you may want to circle your subject at a high altitude with a 30º degree angle, at a middle altitude with around a 45º degree angle, and a lower altitude with a 70º degree angle.

If you are not using a flight planning software you will need to manually fly to ensure there is a 60 to 70 percent overlap in your aerial photo coverage. This will help the triangulation process be more accurate during the processing of your model. To reduce noise in your final 3D model try to avoid capturing any images that have excessive sky in the background.

After you have captured the necessary imagery, it's time to process the data to create the 3D model. Upload your imagery to your Birdi platform account and ensure that you select point cloud or a mesh as an output file.

It's important to note that creating a 3D model with a drone requires a lot of planning and attention to detail. It's also important to comply with all relevant regulations and obtain any necessary permits or licenses before using drones for this purpose. With careful planning and execution, drone 3D modeling can provide excellent results for a variety of applications.