Adaptive Color Grade Interpolation for Viewing Conditions
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Solution Overview
Problem
Existing color mapping operators fail to adapt effectively to a wide range of viewing conditions, particularly in local image regions and specific light situations, leading to a loss of artistic intent when displaying videos across different displays with varying characteristics.
Innovation Solution
A method for interpolating a new color video adapted to target viewing conditions by using a color mapping operator set for both reference and target viewing conditions, generating a third color graded version from a first and second mapped color version, which preserves complex color changes that simple color mapping operators cannot describe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable color mapping operators are used to adapt video to target viewing conditions, then adaptability to different displays is improved, but performance in local image regions and specific light situations deteriorates
Solution Approach 1:
The image is divided into multiple local regions, and color mapping is applied independently to each region. This allows the system to adapt to different viewing conditions while preserving local image characteristics and details that global operators would lose.
Solution Approach 2:
Different color mapping parameters are applied to different local regions of the image based on their specific characteristics. This ensures that each region is adapted appropriately to target viewing conditions while maintaining local quality and detail integrity.
2Reliability
If manual color grading is used to create different video versions for specific viewing conditions, then performance for specific reference viewing conditions is improved, but device complexity and production time deteriorate
Solution Approach 1:
Instead of creating multiple separate video versions through manual color grading, the system changes color mapping parameters dynamically based on target viewing conditions. This allows adaptation to different displays while maintaining a single source video and reducing production complexity.
Solution Approach 2:
The color mapping operators are made dynamic and adjustable based on the target display characteristics. This enables the system to adapt to various viewing conditions automatically without requiring separate manually graded versions for each condition.
3Ease of operation
If simple color mapping operators are used to adapt video colors, then ease of operation is improved, but ability to preserve complex color changes deteriorates
Solution Approach 1:
The system uses composite color mapping operators that combine multiple mapping functions and considerations. This allows the preservation of complex color changes while maintaining ease of operation through automated parameter adjustment based on viewing conditions.
Solution Approach 2:
The color mapping process incorporates feedback mechanisms that analyze the input image characteristics and target viewing conditions to automatically adjust mapping parameters. This preserves complex color relationships while keeping the operation simple and automated.
Data Source
AI summary
An adaptive color grade interpolation method is disclosed. The method comprises interpolating from a first color graded version of a picture adapted to first viewing conditions and a second color graded version of said picture different from the first color graded version and adapted to second viewing conditions in order to obtain a third color graded version of the picture adapted to third viewing conditions wherein said interpolating is obtained from said first color graded version, a first mapped color version of said first color graded version adapted to said third viewing conditions and to a second mapped color version of said first color graded version adapted to said second viewing conditions such that said first color graded version and second mapped color version are interpolated into said first mapped color version.