HDR Video Synthesis via Exposure Alternation and Motion Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional digital cameras struggle to capture high-quality high-dynamic-range video when the view angle changes or the subject moves, as existing technologies require a special light-reduction mechanism, leading to synthesis blurring.
Innovation Solution
A method involving an imaging device that alternately creates frames with different exposure times, determines image differences, and synthesizes frames to create high-dynamic-range video without a special mechanism, using a successive creator, difference determiner, frame creator, synthesizer, and video creator to produce high-quality HDR video.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-reduction device is used to create high-dynamic-range video, then the dynamic range is improved, but the device complexity increases and synthesis blurring occurs when the view angle changes or the subject moves
Solution Approach 1:
The patent removes the light-reduction device from the system entirely. Instead of using a special mechanism to reduce light, the invention captures multiple frames with different exposure times using the standard imaging element, then synthesizes these frames computationally to achieve high dynamic range without any special optical components.
Solution Approach 2:
The patent replaces the mechanical/optical light-reduction device with a computational synthesis system. Rather than physically modifying the light path, the invention uses software processing to combine multiple captured frames with different exposures, substituting a computational approach for a mechanical one.
2Illumination intensity
If a light-reduction device is used to create high-dynamic-range video, then the dynamic range is improved, but synthesis blurring occurs when the view angle changes or the subject moves
Solution Approach 1:
The patent performs preliminary capture of multiple frames with different exposure times before synthesis. By capturing the bright and dark frames separately in advance, the system ensures that each frame is optimally exposed for its specific brightness level, preventing the synthesis blurring that occurs when trying to capture both bright and dark areas in a single frame with a light-reduction device.
Solution Approach 2:
The patent uses dynamic frame selection and synthesis based on detected subject movement and view angle changes. The system adaptively determines which frames to synthesize and how to align them, adjusting the synthesis process in real-time to maintain image quality even when the scene changes between captures.
3Illumination intensity
If frames are captured with different exposure times, then the dynamic range is improved, but the processing complexity increases
Solution Approach 1:
The patent employs automatic subject movement detection and frame alignment algorithms that self-adjust based on the captured frames. The system automatically identifies corresponding features between frames, detects movement, and performs alignment without manual intervention, reducing the perceived processing complexity while maintaining high dynamic range quality.
Data Source
AI summary
In a video creation device, a creator creates a frame of a first type and a frame of a second type. A difference determiner determines whether or not the difference between frames of a determination pair exceeds a threshold, wherein the determination pair contains two frames of the first type, or the frame of the first type and the frame of the second type. A frame creator creates a frame of a third type between frames of a data pair, wherein the data pair contains two frames of the first type next to each other. A synthesizer creates high-dynamic-range frame by synthesizing frames of synthesized pair, wherein synthesized pair contains the frame of the second type and the frame of the first type, or the frame of the second type and the frame of third type. And, a video creator creates video comprised of the frame synthesized by the synthesizer.