Image Processing Device Dynamic Parameter Selection
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Solution Overview
Problem
Existing image processing devices struggle to adapt to diverse video signal expressions, leading to inappropriate processing parameters being used when handling images expressed by various methods, resulting in suboptimal image quality.
Innovation Solution
An image processing device and method that dynamically decides processing parameters based on the transfer function and color range applied to the image, ensuring appropriate parameter selection for optimal image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If processing parameters are optimized for a specific expression method, then processing precision is improved for that method, but adaptability to other expression methods deteriorates
Solution Approach 1:
The patent implements dynamic selection of processing parameters based on the detected transfer function type. The system continuously adapts its processing characteristics according to the input signal's expression method, switching between different parameter sets optimized for HLG, ST2084, S-Log3, or other transfer functions. This dynamic adaptation resolves the contradiction by making the system both precise for each specific method and adaptable across multiple methods.
Solution Approach 2:
The patent changes processing parameters according to the detected transfer function characteristics. Different quantization parameters, coding parameters, and processing settings are applied based on the specific transfer function type identified in the input signal. This parameter adaptation enables the system to maintain optimal processing precision across diverse expression methods while preserving the benefits of method-specific optimization.
2Device complexity
If a fixed processing parameter is used, then device complexity is reduced, but image quality deteriorates when handling diverse expression methods
Solution Approach 1:
The patent performs preliminary detection of the transfer function type before applying processing parameters. By identifying the expression method in advance, the system can select the appropriate parameter set, avoiding the need for complex real-time adaptation mechanisms. This preliminary action reduces device complexity while maintaining image quality through informed parameter selection.
Solution Approach 2:
The system uses metadata or signaling information embedded in the input signal to automatically determine the transfer function type and select appropriate processing parameters without external intervention. This self-service mechanism enables the system to adapt to diverse expression methods while keeping the control logic relatively simple, as the input signal itself provides the necessary information for parameter selection.
Data Source
AI summary
[Object] To prevent an inappropriate processing parameter from being used in a case in which an image that may be expressed by various expression methods is handled.[Solution] Provided is an image processing device including: a control unit that decides a processing parameter for image processing performed on an image on the basis of at least one of a transfer function related to conversion between light and an image signal that is applied to the image or a color range that is applied to the image; and a processing unit that executes the image processing using the processing parameter that is decided by the control unit.