3D-LUT Image Capture Control for User-Tuned Color Correction
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Solution Overview
Problem
Existing image capturing apparatuses struggle to provide user-preferred image quality adjustments using 3D-LUTs, as the default corrections often do not align with individual user preferences, requiring manual post-production processing to combine images shot without and with 3D-LUTs.
Innovation Solution
An image capturing apparatus that includes an acquisition unit for 3D-LUTs, a setting unit to adjust the degree of application, and a generation unit to create a customized second look-up table based on user input, allowing for on-device conversion to achieve desired image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed 3D-LUT is used for image conversion, then the image quality matches the creator's preference, but it does not match all users' preferences and requires post-production processing to adjust
Solution Approach 1:
The patent applies dynamics by making the 3D-LUT adjustable and changeable based on user preferences. Instead of using a fixed correction table, the system allows users to select from multiple 3D-LUTs with different correction strengths (e.g., 30%, 60%, 90% application rates) and to create custom 3D-LUTs by combining base 3D-LUTs. This dynamic adjustment capability resolves the contradiction by maintaining high correction accuracy while adapting to diverse user preferences.
Solution Approach 2:
The patent implements parameter changes by allowing users to modify the application rate parameter of the 3D-LUT correction. Users can adjust the correction strength parameter to match their preferences, and the system generates intermediate 3D-LUTs by applying different weights to base 3D-LUTs. This parameter-based approach enables the system to maintain precise image correction while being versatile enough to satisfy different user preferences without requiring post-production processing.
2Manufacturing precision
If multiple 3D-LUTs are provided for different scenes, then scene-specific correction is improved, but the device complexity and processing requirements increase
Solution Approach 1:
The patent applies merging by combining multiple base 3D-LUTs to generate a single customized 3D-LUT that adapts to different scenes and user preferences. Instead of maintaining separate processing circuits for each scene type, the system merges multiple correction tables through weighted combination and generates one adaptive 3D-LUT that can be applied universally. This reduces device complexity while maintaining scene-specific correction accuracy.
Solution Approach 2:
The patent implements universality by creating a multi-functional 3D-LUT generation system that can handle various scene types through a single unified approach. The system uses one processing circuit that can generate customized 3D-LUTs for different scenes by combining base 3D-LUTs with different weights based on scene detection results. This universal system eliminates the need for separate processing circuits for each scene type, reducing complexity while maintaining high correction accuracy across all scenes.
3Adaptability or versatility
If post-production processing is used to combine images shot with and without 3D-LUT, then user preference customization is achieved, but time and effort requirements increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-generating multiple base 3D-LUTs with different correction characteristics and storing them in the image capturing apparatus. Users can select and customize their preferred 3D-LUT before actual image capture, and the system generates the final customized 3D-LUT in advance by combining base 3D-LUTs. This preliminary preparation eliminates the need for time-consuming post-production processing, as all customization is completed before shooting.
Solution Approach 2:
The patent implements self-service by enabling users to independently select and customize 3D-LUTs through a user interface without requiring external post-production processing. The system provides users with the capability to adjust correction parameters, select from predefined 3D-LUTs, and generate custom 3D-LUTs directly in the camera. This self-service approach allows users to achieve their preferred image quality at the time of capture, eliminating the need for additional post-production time and effort.
Data Source
AI summary
This inventions provides an image capturing apparatus capable of obtaining an image corrected so as to have an image quality preference of a user by changing the degree of application of the 3D-LUT using only a single LUT processing circuit. To this, the image capturing apparatus that includes an image capturing unit, comprises an acquisition unit that acquires a first look-up table for converting image data, a setting unit that sets a degree of application of the first look-up table acquired by the acquisition unit, and a generation unit that generates a second look-up table from the first look-up table based on the degree of application set by the setting unit, wherein image data obtained by the image capturing unit is converted using the second look-up table generated by the generation unit.