Video Signal Adjustment Through Long-Exposure Frame Overlay
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Solution Overview
Problem
Existing video recording methods struggle to capture the trajectory of slow-moving objects like fireworks while maintaining smooth video playback, as extending single frame exposure time reduces frame rate and using time-lapse distorts the perception of time.
Innovation Solution
A method involving a processor that generates result frames through image-overlaying of consecutive input frames, simulating long exposure without affecting smoothness by maintaining frame rate, using image alignment and stabilization techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the single frame exposure time is extended to capture longer fireworks trajectory, then the trajectory length is improved, but the output frame rate is reduced affecting video smoothness
Solution Approach 1:
The patent segments the long exposure capture into multiple short exposure frames taken at high frame rate, then combines them through image overlaying to simulate long exposure effect while maintaining high frame rate output
Solution Approach 2:
The patent merges multiple consecutive input frames through image-overlaying operation to create result frames that simulate long exposure trajectory effect while maintaining the original high frame rate
2Productivity
If time-lapse photography is used to reduce display time of single frame to maintain frame rate, then the frame rate is maintained, but the fireworks appear fleeting affecting user perception
Solution Approach 1:
The patent creates a visual copy of the long exposure effect by overlaying multiple frames, simulating the appearance of slow-dragging fireworks without actually using time-lapse, thus preserving user perception of time
Data Source
AI summary
A method for adjusting video signal is provided. First, a processor is configured to obtain N consecutive input frames obtained by an imaging apparatus. Next, the processor is configured to generate N result frames based on the N input frames, including: storing the first input frame as the first result frame; and selecting a plurality of the N input frames as a source for image-overlaying of the i-th frame according to the time sequence, performing an image-overlaying operation on the selected multiple input frames to obtain the i-th result frame, and storing the i-th result frame. Then, the processor is configured to generate a video signal based on the N result frames.