Focus Lens Positioning for Moving Object Capture
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Solution Overview
Problem
Conventional electronic cameras face challenges in capturing images of moving objects at the desired focus position due to shutter lag and difficulty in predicting the exact timing for capturing high-speed moving subjects.
Innovation Solution
An image capturing apparatus and method that includes a controller to set the focus lens position based on predicted object movement, measure movement speed, and determine the optimal image capturing time, accounting for shutter release lag, allowing for precise image capture of moving objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional shutter button operation is used, then the user can control image capturing, but the timing is inaccurate for high-speed moving objects due to shutter lag
Solution Approach 1:
The system performs preliminary actions by predicting the object's future position and pre-calculating the optimal capture timing before the user actually presses the shutter button. The controller measures movement speed, predicts where the object will be, and determines the exact moment to capture, compensating for shutter lag in advance.
Solution Approach 2:
The system uses feedback by continuously monitoring the object's position and movement speed, then using this information to adjust and refine the predicted capture timing. The phase-difference detection sensor provides feedback about the object's distance and motion, which the controller uses to optimize the capture moment.
2Measurement precision
If manual shutter pressing is used, then the user has control over capture timing, but cannot accurately predict when the object will be at the desired focus position
Solution Approach 1:
The system performs self-service by automatically measuring the object's movement speed and position, then autonomously determining the optimal capture timing without requiring the user to manually predict or calculate these parameters. The controller handles the complex calculations and predictions automatically.
Solution Approach 2:
The system replaces the mechanical/manual process of timing judgment with an automated electronic system. Instead of relying on the user's manual reaction and judgment, the controller uses electronic sensors and algorithms to measure, predict, and determine the optimal capture moment automatically.
3Measurement precision
If focus lens position is set manually, then the user can choose the focus distance, but cannot anticipate where a moving object will be positioned
Solution Approach 1:
The system performs preliminary action by predicting the object's future position and pre-setting or adjusting the focus lens position accordingly before the object actually reaches that position. This anticipatory adjustment ensures the lens is ready to capture the object at the desired focus point.
Solution Approach 2:
The system applies dynamics by making the focus lens position adjustable and responsive to the object's movement. Rather than a fixed manual setting, the focus position can be dynamically adjusted based on the object's speed and trajectory, allowing the system to track and maintain focus on moving targets.
Data Source
AI summary
An image capturing apparatus and method are provided. The image capturing apparatus includes an image capturing unit including a camera, the image capturing unit configured to capture an image, and a controller connected to the image capturing unit. The controller is configured to set a position of a focus lens at a distance at which an object of the image to be captured is predicted to be positioned, to measure a movement speed of the object of the image to be captured, to determine an image capturing time by predicting a time until the object reaches the set position of the focus lens based on the measured movement speed, and to control the image capturing unit to capture the image of the object at the determined image capturing time.