Indicator Position Adjustment for Camera Shake Compensation
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Solution Overview
Problem
Existing moving image reproducing apparatuses struggle to analyze specific motions accurately when using moving images captured with hand-held digital cameras, as camera shake causes field angle changes, disrupting the positional relationship between the learner-golfer and reference lines, leading to imprecise analysis of golf-club swinging form.
Innovation Solution
A moving-image reproducing apparatus and method that includes a displaying unit, a position setting unit, a displacement-information obtaining unit, and a display-position adjusting unit, which displays indicators for analyzing specific motions, sets their positions based on user input, and adjusts these positions based on displacement information to maintain consistency across frames, thereby compensating for camera shake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual frame-by-frame playback operation is used to set indicator positions, then the user can precisely set the display position of indicators for analyzing specific motion, but the operation becomes time-consuming and complex requiring frame-by-frame playback
Solution Approach 1:
The system performs preliminary action by automatically determining the leading frame and pre-positioning the indicator based on displacement information before the actual analysis. The displacement information obtaining unit calculates the displacement between frames in advance, and the display position adjusting unit uses this information to automatically set the indicator position, eliminating the need for manual frame-by-frame playback during analysis.
Solution Approach 2:
The system enables self-service by automatically determining the leading frame and adjusting indicator positions without requiring user intervention for each frame. The displacement information obtaining unit and display position adjusting unit work autonomously to maintain the correct spatial relationship between the indicator and the analyzed object across frames, freeing the user from manual positioning tasks.
2Ease of operation
If hand-held digital camera is used for capturing moving image, then the equipment becomes portable and easy to operate, but camera shake causes field angle changes that disrupt the positional relationship between subject and reference lines
Solution Approach 1:
The system implements feedback by continuously obtaining displacement information about field angle changes and using this feedback to dynamically adjust the indicator position. The displacement information obtaining unit measures the shift caused by camera shake, and the display position adjusting unit applies this feedback to compensate for the distortion, maintaining accurate spatial relationships despite the portable nature of the camera.
Solution Approach 2:
The system applies parameter changes by modifying the display position parameter of the indicator based on the displacement information. When camera shake causes field angle changes, the system changes the indicator's position parameter to compensate for the distortion, thereby maintaining the accuracy of the positional relationship between the indicator and the analyzed object throughout the moving image.
3Ease of manufacture
If indicator display position is fixed before reproduction, then the setup process is simple, but the positional relationship becomes incorrect when field angle changes occur during playback
Solution Approach 1:
The system transitions from a static indicator position to a dynamic one that automatically adjusts during playback. The display position adjusting unit continuously modifies the indicator position based on real-time displacement information obtained from the moving image frames, ensuring the indicator maintains the correct spatial relationship with the analyzed object throughout the entire sequence rather than remaining fixed.
Solution Approach 2:
The system replaces the mechanical manual adjustment mechanism with an automated computational system. Instead of requiring users to manually adjust indicator positions for each frame, the system uses algorithms to calculate displacement information and automatically adjust the indicator position, substituting manual mechanical operations with automated digital processing.
Data Source
AI summary
A moving image reproducing apparatus is provided with CPU 8 and a displaying unit 7. A moving image including plural frames of image is displayed on the display unit 7. CPU 8 sets a display position in one of the frames of image and displays a guide-indicator at the display position, wherein the guide-indicator is used for analyzing a specific motion of a person. CPU 8 displays the guide-indicator on each of the frames of image following the frame of image, in which the display position is set, in an overlapping manner. CPU 8 obtains displacement information of a field angle of each of the reproduced frames of image following the frame of image, in which the display position is set. CPU 8 adjusts the display position based on the displacement information, such that the change of the field angle of each frame of image is cancelled.