LOG Video Processing With LUT Color Grading
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Solution Overview
Problem
Current mobile phone video filters fail to meet high color grading requirements, limiting the ability to achieve desired video effects and styles.
Innovation Solution
A video processing method utilizing a LOG curve and LUTs to process video and snapped images, ensuring high color grading and movie-quality results, even with lower video storage resolutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a filter principle is used in shooting mode, then the video processing is simple and fast, but the color grading quality cannot meet high requirements
Solution Approach 1:
The patent applies preliminary action by converting video data to LOG color space before storage, preserving more luminance and color information in advance. This preprocessing step enables high-quality color grading later without requiring complex real-time processing during shooting, thus resolving the contradiction between color grading quality and processing complexity.
Solution Approach 2:
The patent changes the color space parameter from standard RGB to LOG color space, which has different mathematical characteristics that preserve more dynamic range information. This parameter change allows for better color grading results while using efficient LOG curve algorithms to maintain reasonable processing complexity.
2Manufacturing precision
If video is stored at lower resolution, then storage space is saved, but color grading效果和 movie quality are compromised
Solution Approach 1:
The patent changes the color space parameter to LOG and applies efficient LOG curve algorithms that preserve more luminance and color information. This allows the video to maintain movie quality and color grading effects even at lower resolutions, thus saving storage space while preserving quality.
Solution Approach 2:
The patent applies local quality by selectively preserving important visual information (luminance and color data in LOG space) while allowing less critical details to be compressed more aggressively. This enables maintaining perceived movie quality at lower resolutions, optimizing the balance between storage space and visual quality.
3Loss of information
If LOG curve processing is applied to video, then color information is preserved, but processing time increases
Solution Approach 1:
The patent applies preliminary action by performing LOG curve conversion during the video shooting and storage phase rather than during playback or post-processing. This shifts the processing burden to when the video is first captured, preserving information efficiently without adding processing time during other critical operations.
Solution Approach 2:
The patent replaces complex real-time color space conversion mechanisms with pre-computed LOG curve lookup tables and efficient algorithms. This substitution reduces processing time while still preserving luminance and color information effectively, resolving the contradiction between information preservation and processing speed.
Data Source
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. The video processing method includes: determining one video storage resolution; determining one video style template; 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; processing the snapped image by using the LOG curve; converting a LOG video into a determined video storage resolution if the determined video storage resolution is less than a preset resolution, and processing the LOG video based on a LUT; and processing a LOG-based snapped image based on the LUT, where a resolution of the snapped image is equal to the preset resolution.