Image Sensor Exposure Control for Moving Velocity
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Solution Overview
Problem
Conventional image-capturing apparatuses attached to moving persons or objects fail to capture smooth moving images due to the combination of wide angle of view and short exposure times, resulting in reduced image blur and a lessened sense of speed during reproduction.
Innovation Solution
The apparatus includes an image sensor, an acquisition unit for velocity information, and a control unit that adjusts exposure time based on the moving velocity, extending it as the velocity increases to enhance image blur and maintain a realistic sense of speed, while also reducing ISO sensitivity and adjusting frame rates and image processing to achieve proper exposure and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the image-capturing apparatus uses a wide angle of view and short exposure time, then the apparatus can capture moving images during movement, but the reproduced images lack realistic sense of speed and appear smooth without appropriate image blur
Solution Approach 1:
The patent applies dynamics by making the exposure time adjustable based on the moving velocity of the apparatus. The control unit dynamically changes the exposure time from a first exposure time to a second exposure time (longer than the first) according to velocity information, allowing the system to adapt to different motion conditions and produce realistic image blur that conveys speed sensation.
Solution Approach 2:
The patent changes the exposure time parameter based on velocity information. When the apparatus moves, the control unit extends the exposure time to accumulate electric charges for a longer duration, creating image blur that reflects the motion state. This parameter change transforms the fixed exposure time into a variable parameter that responds to motion conditions.
2Manufacturing precision
If the exposure time is extended to accumulate electric charges, then realistic image blur and sense of speed are achieved, but the image quality may deteriorate due to over-exposure
Solution Approach 1:
The system dynamically adjusts exposure time based on velocity information rather than using a fixed extended exposure time. The control unit selectively extends exposure time only when motion is detected, and adjusts the degree of extension according to the magnitude of velocity, preventing over-exposure in stationary or slow-moving conditions while achieving appropriate blur during fast motion.
Solution Approach 2:
The control unit uses velocity information as feedback to regulate exposure time. By continuously monitoring motion state and adjusting exposure parameters accordingly, the system maintains optimal image quality across varying conditions, preventing over-exposure while ensuring realistic blur when needed.
3Speed
If the exposure time is dynamically adjusted based on velocity, then realistic sense of speed is achieved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms with electronic control. The control unit electronically adjusts the exposure time parameter based on velocity information from sensors, avoiding the need for mechanical moving parts or complex optical mechanisms while achieving the same effect of variable exposure.
Solution Approach 2:
The system uses its own velocity information (self-generated data from motion sensors) to automatically adjust exposure parameters without requiring external input or complex external control systems. The apparatus serves itself by using its motion state data to regulate its own imaging parameters.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures smooth reproduction of moving images with appropriate image blur, providing a realistic sense of speed and improved image quality by dynamically adjusting exposure times and processing parameters based on the apparatus's velocity.
Implementation Method 1
an image sensor that receives light from a subject and outputs moving image data
Data Source
AI summary
An image-capturing apparatus for generating a moving image includes an image sensor that receives light from a subject and outputs moving image data, an acquisition unit that acquires velocity information, and a control unit that controls an exposure time of the image sensor. The control unit controls the image sensor to receive the light from the subject for a first exposure time and changing the first exposure time to a second exposure time for accumulating electric charges, the second exposure time being longer than the first exposure time, based on the velocity information of the image-capturing apparatus.