Dual Sensor Camera Motion-Adaptive Exposure Control
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Solution Overview
Problem
Existing image capture technologies face challenges in reducing motion blur, even when high shutter speeds are set, as subjects may move unexpectedly during exposure, leading to blurred images.
Innovation Solution
An image pickup apparatus with a first and second image pickup device, along with a processor, calculates subject motion and adjusts exposure timing and optical system settings to minimize blur, using motion vectors and permissible blur values to determine optimal exposure end timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If shutter speed is set high to reduce motion blur, then exposure time is shortened, but subject motion during exposure causes blur in captured images
Solution Approach 1:
The system performs preliminary action by capturing a pre-shot image before the main exposure and analyzing subject motion in advance. The calculating unit computes motion vectors from the pre-shot image to predict subject movement during the actual exposure period, enabling proactive adjustment of exposure timing rather than reactive correction.
Solution Approach 2:
The system implements feedback by continuously monitoring subject motion through motion vector calculation and using this information to dynamically adjust exposure end timing. The control unit receives motion information from the calculating unit and modifies the exposure timing accordingly, creating a closed-loop control system that adapts to actual subject movement.
2Illumination intensity
If exposure time is extended to capture fast-moving subjects, then more light is captured, but motion blur increases in the image
Solution Approach 1:
The system applies dynamics by making the exposure end timing variable rather than fixed. Based on calculated motion vectors from pre-shot images, the control unit dynamically adjusts when to terminate exposure, allowing longer exposure times for slow-moving subjects and shorter times for fast-moving subjects, optimizing both light capture and sharpness for each specific situation.
Solution Approach 2:
The system changes the exposure timing parameter dynamically based on subject motion characteristics. By calculating motion vectors and using them to adjust the exposure end timing, the system modifies the exposure duration parameter adaptively, allowing optimal balance between illumination capture and motion blur prevention for different subject speeds.
3Measurement precision
If shutter speed is set high before capturing, then exposure time is reduced, but unexpected fast subject motion still causes blur
Solution Approach 1:
The system performs preliminary action by capturing and analyzing a pre-shot image before the actual exposure. This preliminary analysis of subject motion through motion vector calculation enables the system to anticipate fast subject movement and adjust exposure timing accordingly, rather than relying on predetermined shutter speeds that cannot adapt to unexpected motion.
Solution Approach 2:
The system implements real-time feedback by calculating motion vectors from pre-shot images and using this information to dynamically control exposure end timing. This feedback mechanism enables the system to respond adaptively to actual subject motion characteristics, improving versatility in handling various subject speeds and motion patterns.
Data Source
AI summary
The image pickup apparatus of the present invention sets at least an imaging magnification of an optical system included in a second image pickup device or a sampling pitch of a signal in the second image pickup device; calculates, using image data of a plurality of frames captured by second image pickup device during exposure of first image pickup device for image data of a first frame, the amount of subject motion in the image data of the plurality of frames; and controls the exposure of the first image pickup device for the image data of the first frame, on the basis of the calculated amount of subject motion.