Image Processing Apparatus Reproducing Color Grading via Normalized Metadata
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Solution Overview
Problem
Conventional image processing systems face challenges in reproducing the results of provisional color grading in substantial color grading processing due to differences in processing ranges between provisional and substantial color grading apparatuses.
Innovation Solution
An image processing apparatus that acquires an image signal and performs image processing based on parameters and ranges acquired from an external image processing unit, allowing for the reproduction of image processing performed in the external unit, including recording and outputting information associated with the parameter and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If provisional color grading is performed in a separate external apparatus, then the load of substantial color grading after photographing is reduced, but the processing range differences between apparatuses prevent accurate reproduction of provisional grading results
Solution Approach 1:
The patent introduces an intermediary data structure (metadata containing processing range information) that mediates between the provisional color grading apparatus and the substantial color grading apparatus. This metadata acts as a translator that conveys the processing range parameters from one apparatus to another, enabling accurate reproduction despite differences in apparatus capabilities. The metadata includes specific parameters such as signal level ranges and processing boundaries that allow the substantial color grading apparatus to replicate the provisional grading results accurately.
2Ease of operation
If parameters of provisional color grading are added to photographed image at photographing, then the load of substantial color grading operation is reduced, but processing based on these parameters cannot be accurately performed when processing ranges differ between apparatuses
Solution Approach 1:
The patent applies parameter changes by transforming the provisional color grading parameters into a standardized format that includes processing range information. The system converts the parameters from one apparatus's signal level range to another's range using mathematical transformations. This allows the substantial color grading apparatus to accurately reproduce the provisional grading results even when the apparatuses have different processing ranges, maintaining both ease of operation and processing precision.
3Adaptability or versatility
If different processing ranges are used in provisional and substantial color grading apparatuses, then each apparatus can operate within its optimal range, but the provisional color grading processing cannot be reproduced in the substantial color grading processing
Solution Approach 1:
The patent implements dynamics by making the color grading processing adaptive to different apparatus capabilities. The system dynamically adjusts the processing parameters based on the signal level ranges of both the provisional and substantial color grading apparatuses. This dynamic adaptation allows each apparatus to operate within its optimal range while maintaining processing consistency through real-time parameter transformation and range normalization.
Data Source
AI summary
To allow re-producing, in another image processing apparatus, contents of image processing in an image processing apparatus, a provisional color grading apparatus 300 determines normalizing points (CodeValues that serve as references for normalizing) of input image signals according to format information and normalizes the input image signals. The provisional color grading apparatus 300 records values (normalizing information) obtained by converting the normalizing points into numerical values independent of devices, in association with parameters of color grading.