Camera Motion Blur Capture Without Flash Using Variable Filters
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Solution Overview
Problem
Photographers face challenges in creating a trailing motion blur effect without the use of flash, which can be disruptive and inappropriate in certain settings, and existing methods do not effectively capture clear images of moving subjects with motion blur.
Innovation Solution
Implementing a variable light-transmissive filter in front of the image sensor to adjust light transmission during exposure, combining multiple images taken in rapid succession, or using dual cameras with different shutter speeds and sensitivities to create a trailing motion blur effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a slower shutter speed is used to capture motion blur, then the motion blur effect is improved, but the clarity of the image deteriorates
Solution Approach 1:
The exposure process is segmented into multiple distinct phases: a first exposure period capturing motion blur, and a second exposure period capturing a clear image. This segmentation allows each phase to serve its specific function - the first phase captures the motion trail while the second phase captures the sharp final position, resolving the contradiction between motion blur and image clarity.
Solution Approach 2:
The shutter operates periodically with distinct time periods - a longer first period for motion blur capture and a shorter second period for clear image capture. This periodic action with varying durations enables the system to achieve both motion blur effect and image clarity at different stages of the exposure cycle.
2Duration of action of moving object
If a flash is used to achieve rear-curtain sync motion blur, then the trailing motion blur effect is improved, but the suitability for certain settings deteriorates
Solution Approach 1:
The flash component is extracted and removed from the exposure system. Instead of relying on flash to achieve rear-curtain sync effect, the patent uses natural light during a second exposure period. This extraction eliminates the limitation of flash usage in certain settings while preserving the trailing motion blur effect through multi-phase natural light exposure.
3Duration of action of moving object
If a longer exposure time is used to show motion blur, then the motion blur is improved, but the light transmission to the sensor deteriorates
Solution Approach 1:
The shutter dynamically adjusts its opening duration through multiple exposure periods. A first dynamic period allows longer exposure for motion blur with reduced light transmission, while a second dynamic period provides shorter exposure for clear imaging. This dynamic control of exposure timing resolves the contradiction between exposure duration and light transmission intensity.
Data Source
AI summary
A camera system and method provide a trailing motion blur effect without the use of a flash. In one embodiment, a variable light-transmissive filter is positioned in front of an image sensor. While the light-transmissive property of the filter is lower, the blurred image of the object in motion is produced. The light-transmissive property of the filter is increased during the exposure in order to produce a clearer image of the object. In a method, a plurality of images taken in rapid succession are combined to produce a clear image of the object with a trailing blurred image of the object.