Imaging Apparatus Automatic Shooting Exposure Control
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Solution Overview
Problem
Conventional imaging technologies experience shooting time lag and fail to capture image data with correct exposure when a prolonged time is taken to enter automatic shooting mode, leading to changes in subject luminance.
Innovation Solution
An imaging device and program that include automatic shooting control and exposure adjustment mechanisms, which successively judge conditions for automatic shooting and perform exposure adjustments in an aperture preferred mode to prevent time lag and ensure correct exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If automatic shooting control calculates imaging conditions upon entering automatic shooting stand-by state, then shooting time lag is reduced, but exposure accuracy deteriorates when prolonged time is taken due to subject luminance changes
Solution Approach 1:
The system performs preliminary exposure adjustment calculations during the automatic shooting stand-by state before actual shooting occurs. By pre-calculating imaging conditions while the subject is in the stand-by state, the system reduces shooting time lag while ensuring exposure accuracy is maintained through continuous monitoring and adjustment before the actual capture moment.
Solution Approach 2:
The system implements feedback mechanisms that continuously monitor subject luminance during the automatic shooting stand-by state. When luminance changes are detected, the exposure adjustment calculations are updated accordingly, ensuring that the final exposure settings account for any luminance variations that occurred during the stand-by period, thus maintaining exposure accuracy while minimizing time lag.
2Adaptability or versatility
If exposure adjustment is performed in non-aperture preferred mode, then exposure flexibility is improved, but shooting timing accuracy deteriorates due to prolonged adjustment time
Solution Approach 1:
The system dynamically switches between different exposure adjustment modes depending on the situation. During automatic shooting stand-by, it uses aperture preferred mode for rapid, accurate timing. When versatility is needed, it transitions to non-aperture preferred mode but with optimized calculation algorithms that minimize the time penalty, thus balancing timing accuracy with exposure flexibility.
Solution Approach 2:
The system changes the exposure adjustment parameters and calculation methods based on the shooting mode and timing requirements. By adjusting the computational parameters of exposure calculation, the system can achieve faster results in aperture preferred mode for timing-critical situations, while still providing flexible exposure control in non-aperture modes when timing is less critical.
Data Source
AI summary
In a digital camera, in an automatic shooting stand-by state, when it is judged that an automatic shooting condition has not been satisfied, it is judged whether or not to issue an AE re-processing command (that is, it is judged whether or not the current shooting condition is similar to a condition where the automatic shooting condition is satisfied). When it is judged to issue the AE re-processing command, exposure tracking in an aperture-priority mode is performed, and shooting exposure conditions excluding the aperture value for still-image shooting in the aperture-priority mode are determined. Then, storage is updated. When it is judged that an automatic shooting condition has been satisfied, record processing for still-image shooting is performed with the updated shooting exposure conditions without changing the aperture value.