UAV Camera Metering Control for Rapid Brightness Changes
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Solution Overview
Problem
In aerial photography using unmanned aerial vehicles (UAVs), the rapid changes in scenes often lead to overexposure or underexposure issues due to the reliance on fixed metering modes, particularly the center metering mode, which fails to adapt quickly to varying brightness conditions.
Innovation Solution
A method and apparatus that acquire brightness information from current and previous image frames, determine changes in brightness, and adjust the metering mode based on the motion state of the UAV's camera, switching between spot, center, and average metering modes to maintain accurate exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spot metering mode is adopted for shooting, then metering precision is improved, but reliability deteriorates due to rapid scene changes causing the metering spot to stay in certain areas and cause overexposure or underexposure
Solution Approach 1:
The patent applies dynamics by making the metering mode adjustable and adaptive rather than fixed. The system dynamically switches between spot metering mode (for precision when needed) and other metering modes (for reliability during rapid scene changes) based on real-time scene analysis and UAV motion state, resolving the contradiction between metering precision and exposure reliability
Solution Approach 2:
The patent changes the parameter of metering mode from a static setting to a dynamically adjustable parameter. By monitoring scene brightness changes and UAV motion state, the system adjusts the metering mode parameter in real-time, allowing the system to maintain both precision and reliability under different shooting conditions
2Reliability
If center metering mode is adopted, then exposure reliability is improved for overall exposure, but measurement precision deteriorates due to inability to adapt quickly to varying brightness conditions
Solution Approach 1:
The system dynamically adjusts the metering mode based on real-time scene analysis. When rapid brightness changes are detected or the UAV is in motion, the system switches from center metering mode to spot metering mode, enabling quick adaptation to varying brightness conditions while maintaining exposure reliability through automated mode selection
Solution Approach 2:
The patent implements feedback by continuously monitoring scene brightness information and comparing it with previous frames. When brightness changes exceed a threshold or the UAV motion state indicates movement, the system receives feedback and automatically adjusts the metering mode, ensuring both reliability and precision in varying lighting conditions
Data Source
AI summary
Embodiments of the present invention discloses a metering adjustment method, apparatus and device and a storage medium. The method includes: acquiring brightness information of a current image frame and a previous image frame captured by a shooting apparatus of an unmanned aerial vehicle (UAV); determining whether the brightness information of the current image frame changes relative to the brightness information of the previous image frame; if so, acquiring motion state information of the shooting apparatus; and adjusting a metering mode of the shooting apparatus according to the motion state information of the shooting apparatus.