Intermittent Photography Aperture Fixing for Blur Consistency
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Solution Overview
Problem
Time-lapse photography often results in unnatural changes in the degree of blur of objects due to fixed exposure control values, which are not adjusted according to changes in luminance, leading to inconsistent image quality in generated moving images.
Innovation Solution
An image pickup apparatus that intermittently photographs objects at predetermined intervals, allowing for selection of photography modes and dynamic adjustment of exposure control values, particularly by fixing the aperture value determined in the first photographing operation for subsequent operations, to maintain consistent exposure and reduce blur inconsistencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If exposure control values are fixed for all intermittent photography operations, then the operation is simple and fast, but the brightness cannot be properly adjusted according to changes in luminance of the object
Solution Approach 1:
The patent applies dynamics by transitioning from fixed exposure control values to dynamic adjustment. The aperture value is fixed for all operations, but other exposure control values (shutter speed, ISO) are dynamically adjusted based on luminance changes detected during intermittent photography, allowing the system to adapt to changing lighting conditions while maintaining operational simplicity.
Solution Approach 2:
The patent changes exposure parameters selectively. The aperture value remains fixed, while other exposure control values are changed based on luminance changes. This partial parameter change approach allows the system to maintain consistency in depth of field while adapting brightness to changing conditions.
2Adaptability or versatility
If aperture value is changed according to changes in luminance of the object, then brightness is properly adjusted, but the depth of field changes causing unnatural changes in degree of blur of the object
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different exposure parameters. The aperture value is fixed to maintain consistent depth of field and blur characteristics, while other exposure control values are locally adjusted to handle brightness changes. This selective approach ensures that only the necessary parameters are changed.
Solution Approach 2:
The patent uses dynamics by making only the necessary exposure parameters dynamic. Instead of changing aperture value which would affect blur, the system dynamically adjusts other exposure control values (shutter speed, ISO) to compensate for luminance changes, thereby maintaining stable image characteristics while adapting to lighting conditions.
3Adaptability or versatility
If exposure control values are dynamically adjusted for each intermittent photography operation, then brightness is properly adapted to luminance changes, but the complexity of control increases
Solution Approach 1:
The patent reduces complexity by applying local quality to exposure control. Instead of dynamically adjusting all exposure parameters, the system fixes the aperture value and only dynamically adjusts other exposure control values based on luminance changes. This selective approach simplifies the control system while maintaining necessary adaptability.
Solution Approach 2:
The patent segments the exposure control into two parts: fixed aperture value for maintaining depth of field consistency, and dynamically adjustable other exposure control values for brightness adaptation. This segmentation allows the system to handle complexity by treating different parameters differently based on their functional requirements.
Data Source
AI summary
An image pickup apparatus capable of performing intermittent photography while suppressing unnatural changes in degree of blur of an object. The image pickup apparatus obtains a plurality of images by causing an image pickup section to intermittently photograph an object at predetermined time intervals. One of photography modes is selected according to the object, exposure control values to be used in photographing by the image pickup section are determined based on the selected photography mode, and exposure control is performed according to the determined exposure control values. When the selected photography mode in first photographing is a first photography mode in which an aperture value as one of the exposure control values is variable, the other exposure control values in second photographing performed after the first photographing are determined by using the aperture value determined in the first photographing.