Periodic Motion Frame Selection for Stop-Motion Animation
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Solution Overview
Problem
Existing methods for generating stop-motion animation are inefficient due to labor-intensive manual frame extraction and lack of intelligence in timed frame extraction.
Innovation Solution
A method and apparatus that utilize a posture estimation algorithm to automatically extract video frames corresponding to the same or different postures in sequential or reversed sequential order based on periodic motion, generating a stop-motion animation without manual selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual frame extraction is used, then the stop-motion animation can be generated with high precision in selecting frames, but the process becomes labor consuming and inefficient
Solution Approach 1:
The patent replaces the manual mechanical operation of frame selection with an automated computer-based system that uses posture estimation algorithms and periodic motion detection to automatically identify and extract key frames, thereby eliminating manual labor while maintaining frame selection precision
Solution Approach 2:
The system performs self-service by automatically analyzing video content, detecting periodic motions, estimating postures, and selecting frames without human intervention, allowing the animation generation process to be autonomous and efficient
2Ease of operation
If timed frame extraction is used, then the animation generation process is simple, but the method lacks intelligence and cannot adapt to different motion patterns
Solution Approach 1:
The system dynamically changes extraction parameters based on detected motion characteristics, including periodicity detection, posture estimation results, and motion direction analysis, allowing the extraction process to adapt intelligently to different animation scenarios while maintaining operational simplicity
Solution Approach 2:
The patent implements a dynamic extraction system that adjusts its behavior based on real-time analysis of video content, detecting periodic motions and adapting frame selection strategies according to the specific motion patterns observed, rather than using fixed timed intervals
3Loss of information
If multiple postures are extracted in sequential order, then the stop-motion animation shows complete motion progression, but the extraction complexity increases
Solution Approach 1:
The patent segments the motion analysis into distinct components including periodicity detection, posture estimation, and frame selection, allowing each aspect to be processed independently and systematically, thereby managing complexity while preserving complete motion information
Solution Approach 2:
The system performs preliminary actions by first detecting periodic motions and estimating postures before proceeding to frame extraction, preparing the necessary information in advance to simplify the subsequent selection process and ensure complete motion information is captured
Data Source
AI summary
A method and an apparatus for generating a stop-motion animation, a computer readable storage medium, and a computer device. The method comprises: acquiring a video containing a periodic motion of a target, the video containing a preset number of continuous motion periods (S101); determining an initial motion period of the target in the video by using a posture estimation algorithm (S102); determining a start period node according to the initial motion period, determining subsequent period nodes according to the start period node, and for the preset number of continuous motion periods, respectively extracting, in each motion period, a video frame corresponding to the same posture, or respectively extracting, in each motion period, a video frame corresponding to a different posture in a sequential order or reversed sequential order of motion, so as to obtain a video frame sequence of the stop-motion animation (S103); and generating a stop-motion animation video according to the video frame sequence of the stop-motion animation (S104). The method is simple in operation, and performs frame extraction automatically using an algorithm, without the need of selecting video frames manually, greatly improving the efficiency of generating a stop-motion animation and having high robustness.