Time-Lapse Exposure Correction via Preliminary Action
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Solution Overview
Problem
Existing techniques for generating time-lapse moving images often result in exposure control errors during the first shooting affecting subsequent shots, leading to inconsistent image quality due to the need for durable camera mechanisms and unpredictable exposure control.
Innovation Solution
An image capture apparatus and method that includes a photometry unit for acquiring brightness information, a control unit for exposure control, and a correction unit to calculate and apply differences in photometric information between initial and subsequent shots, ensuring accurate exposure across consecutive image captures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automatic exposure control is performed at the time of first shooting by driving mechanisms such as diaphragm and shutter, then exposure accuracy is improved, but mechanisms need to be highly durable and exposure errors affect subsequent shootings
Solution Approach 1:
The patent performs exposure control mechanisms driving before the time-lapse shooting starts, specifically at the first shooting moment. The diaphragm and shutter are positioned to appropriate states in advance based on photometric information, so that subsequent shootings do not require mechanism driving. This preliminary action ensures exposure accuracy is established beforehand while avoiding the need for durable mechanisms throughout the entire shooting duration.
2Reliability
If mechanisms such as diaphragm and shutter are fixed during time-lapse shooting, then mechanism durability is improved, but exposure control accuracy at first shooting greatly affects subsequent shootings
Solution Approach 1:
The patent performs exposure control mechanisms driving before the time-lapse shooting starts, specifically at the first shooting moment. The diaphragm and shutter are positioned to appropriate states in advance based on photometric information, so that subsequent shootings do not require mechanism driving. This preliminary action ensures exposure accuracy is established beforehand while avoiding the need for durable mechanisms throughout the entire shooting duration.
3Adaptability or versatility
If shooting is performed at predetermined time intervals for time-lapse moving images, then time-lapse generation is enabled, but shooting time becomes several times longer than the duration of the generated moving image
Solution Approach 1:
The patent performs exposure control mechanisms driving before the time-lapse shooting starts, specifically at the first shooting moment. The diaphragm and shutter are positioned to appropriate states in advance based on photometric information, so that subsequent shootings do not require mechanism driving. This preliminary action ensures exposure accuracy is established beforehand while avoiding the need for durable mechanisms throughout the entire shooting duration.
Data Source
AI summary
An image capture apparatus comprises a photometry unit that acquires photometric information that indicates brightness of a captured image of a subject, a control unit that controls exposure based on the photometric information, and a correction unit that, at a time of acquiring a plurality of images, which are to be used when generating a time-lapse moving image and are obtained by consecutive image capturing of a subject, obtains a difference between first photometric information acquired prior to a first image capturing in the consecutive image capturing and second photometric information based on an image obtained by performing the first image capturing in a state in which exposure control has been performed, and corrects photometric information at the time of second and subsequent image capturing in the consecutive image capturing using the difference.