How to improve image accuracy in drone aerial photography
Unmanned aerial surveying and mapping is a process in which unmanned aerial vehicles are used as aerial platforms, and airborne remote sensing devices such as high-resolution CCD digital cameras, light optical cameras, infrared scanners, laser scanners, magnetic sensors, etc. are used to obtain information. The image information is processed by computers and produced into images according to certain accuracy requirements.
Tips for improving image accuracy
1. Choose shooting under clear weather conditions, preferably at noon, and ensure consistency in the shooting time to prevent significant color differences in the photos.
2. Patching is a very important task to improve the details of the model, but it is also a very dangerous and explosive behavior. When retaking, it is important to pay attention to safety and not immerse yourself in choosing the best position and posture, forgetting to avoid obstacles on the plane. So, on the one hand, pilots need to pay attention to surrounding safety, and on the other hand, they need colleagues to accompany and monitor the flight environment of the aircraft. If there is a danger, they should ask the drone to stop moving in a timely manner.
3. Supplementary shooting can be divided into multiple layers of surround, outer large circles and inner small circles, and shooting from far to close. Regardless of the method, it is important to minimize the amount of space occupied by the sky and distant scenery in the image, as capturing distant objects is not beneficial for modeling.
4. After completing the route, it is necessary to take multiple surround shots. The selected camera shooting parameters, especially brightness and color, should be as close as possible.
5. The purpose of surround photography is to compensate for dead spots and details. "A good model can only be built where it can be captured, and what cannot be captured will only be pulled or melted. It is always good to take more additional shots." The overlap rate of the additional shots should be controlled at around 50%, and the color and brightness of the additional photos should be as close as possible to the photos taken on the route.
6. The important parts and structures of key buildings should be photographed separately in a circle.