LOG-LUT Video Processing for High-Quality Color Grading
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Solution Overview
Problem
Current mobile phone video filters fail to meet high color grading requirements, and existing technologies do not effectively address the need for diverse video styles and imaging quality in both moving and still scenes.
Innovation Solution
A video processing method that utilizes a logarithm (LOG) curve and Look Up Tables (LUTs) to process video and snapped images, enabling high color grading and matching desired video styles, with specific processing steps for moving and still scenes to enhance imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a filter principle is used in shooting mode to capture video, then the video processing is simple and fast, but the color grading quality cannot meet high requirements
Solution Approach 1:
The patent applies LOG curve processing in advance during video capture to preserve more luminance information and dynamic range, creating a foundation for high-quality color grading. This preliminary action allows subsequent LUT-based color styling to achieve movie-quality effects without requiring complex real-time processing during playback.
Solution Approach 2:
The patent introduces LUT (Look-Up Table) as an intermediary tool between the captured LOG video and the final styled video. The LUT enables efficient color space transformation and style application, achieving high color grading quality while maintaining relatively simple processing complexity through pre-computed lookup tables.
2Manufacturing precision
If dual exposure frames are fused to improve imaging quality, then still image quality improves, but moving scene processing becomes complex and may cause smearing
Solution Approach 1:
The patent dynamically adapts the dual-exposure fusion strategy based on scene motion detection. For still scenes, both exposure frames are fused to maximize imaging quality. For moving scenes, the system selectively uses only the second exposure frame to avoid smearing artifacts. This dynamic approach optimizes the trade-off between quality and complexity based on real-time scene analysis.
Solution Approach 2:
The patent applies different processing strategies to different regions or types of scenes. By detecting whether a scene is moving or still, the system applies appropriate fusion algorithms locally - full dual-exposure fusion for still regions and single-exposure usage for moving regions - thereby achieving high quality where possible without compromising overall video integrity.
Data Source
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AI summary
Embodiments of this application relate to the technical field of video shooting, and provide a video processing method and apparatus, an electronic device, and a storage medium, to enable, based on a characteristic of a LUT, a video shot through the electronic device to present a different style effect, meeting a higher color grading requirement. The video processing method includes: determining one video style template among a plurality of video style templates, where each video style template is corresponding to a LUT; obtaining a video shot through a camera lens; snapping a corresponding image in the video as a snapped image in response to a snapping instruction; processing the video by using a LOG curve, to obtain a LOG video; processing the snapped image by using the LOG curve, to obtain a LOG-based snapped image; processing the LOG video based on a LUT, to obtain a video corresponding to the determined video style template; and processing the LOG-based snapped image based on the LUT, to obtain a snapped image corresponding to the determined video style template.