Moving Picture Synchronization via Feature Point Detection
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Solution Overview
Problem
Existing methods for synchronizing multiple cameras during moving picture photography require precise time synchronization, which can be challenging and often rely on hardware support, limiting the accuracy and ease of simultaneous photographing and replaying of synchronized moving pictures.
Innovation Solution
A moving picture processing device and method that includes a feature point detection unit, frame identification unit, and synchronization control unit to detect and synchronize frames based on changing states of feature points, allowing for accurate synchronization without the need for highly precise time synchronization or hardware support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If precise time synchronization is used to synchronize multiple cameras, then synchronization accuracy is improved, but device complexity and hardware requirements increase
Solution Approach 1:
The patent replaces the mechanical/time-based synchronization system with an image-processing-based synchronization system. Instead of relying on precise time synchronization hardware and shutter signals, the system captures images at slightly different times and uses image processing to identify corresponding frames by detecting feature points and comparing image content. This substitution of mechanical/time-based methods with information-processing methods resolves the contradiction by achieving synchronization accuracy through software-based frame matching rather than hardware-based time coordination.
2Reliability
If shutter signal transmission is used to synchronize cameras, then synchronization is achieved, but the method requires precise time adjustment and hardware support
Solution Approach 1:
The patent implements a self-service synchronization mechanism where the system automatically determines the optimal pairing between images from different cameras through image processing. The synchronization is achieved by having the system itself analyze the captured images, detect feature points, and identify corresponding frames without requiring external time synchronization hardware or manual adjustment. This self-service approach improves ease of manufacture and setup while maintaining synchronization reliability.
Solution Approach 2:
The patent introduces image feature points and image content comparison as an intermediary mechanism between the cameras. Instead of directly synchronizing cameras through shutter signals, the system uses image processing to establish the temporal correspondence between images captured at different times. This intermediary approach simplifies the synchronization process by eliminating the need for direct camera-to-camera time synchronization while maintaining reliability.
3Measurement precision
If time information transmission is used for synchronization, then frame alignment is achieved, but precise time adjustment is required
Solution Approach 1:
The patent replaces the time-information transmission mechanism with an image-content-based matching mechanism. Instead of transmitting time information and adjusting camera clocks to achieve frame alignment, the system captures images with time offsets and uses image processing to identify corresponding frames by comparing feature points and image content. This substitution eliminates the need for manual time adjustment operations while maintaining frame alignment accuracy.
Data Source
AI summary
A moving picture processing device detects a predetermined feature point existing in a frame of a moving picture, identifies a position of the frame, in which a changing state of the detected feature point in the moving picture shows a predetermined changing state, and causes the predetermined changing state, as a condition to identify the position of the frame, to be common to other moving pictures.