HDR Image Processing with OETF-EOTF Metadata Preservation
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Solution Overview
Problem
Users may inadvertently recognize HDR images as SDR images due to automatic gradation conversion, preventing desired confirmation and compilation.
Innovation Solution
Implementing settings for opto-electronic transfer function (OETF) and electro-optical transfer function (EOTF) to generate and record or display images with associated meta information, ensuring the dynamic range is maintained as specified by the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatic gradation conversion is performed to convert HDR image to SDR image, then the image can be displayed on standard displays, but the user cannot recognize the image as HDR and perform desired confirmation and compilation
Solution Approach 1:
The patent separates the image data into two distinct components: the developed image data (which may be in HDR or SDR format) and the metadata indicating the original dynamic range setting. This segmentation allows the image to be stored and processed in its native format while providing separate information about its dynamic range characteristics, enabling both display compatibility and HDR recognition without automatic conversion.
Solution Approach 2:
The patent introduces metadata as an intermediary element that carries information about the original dynamic range setting (HDR or SDR) without requiring actual conversion of the image data. This metadata acts as a mediator between the HDR image content and standard SDR displays, allowing the system to maintain HDR information integrity while enabling proper display and recognition through the accompanying metadata tag.
2Adaptability or versatility
If HDR image is processed with different EOTF settings, then the image can be optimized for different display devices, but automatic conversion may occur causing user confusion about the actual dynamic range
Solution Approach 1:
The patent performs preliminary action by recording the EOTF setting information in metadata at the time of image capture or processing, before any display or further processing occurs. This preliminary recording of the dynamic range setting ensures that the original HDR or SDR characteristic is preserved and accurately identified later, preventing confusion about the actual dynamic range regardless of what display optimizations are applied.
Solution Approach 2:
The patent implements feedback by using the recorded metadata about the original EOTF setting to guide subsequent processing and display decisions. The system continuously references this metadata information to maintain awareness of the image's true dynamic range characteristics, providing feedback that prevents incorrect assumptions and ensures reliable HDR recognition throughout the image lifecycle.
Data Source
AI summary
An information processing device performs a first setting relating to an opto-electronic transfer function (OETF), performs a second setting relating to an electro-optical transfer function (EOTF), generates a developed image by applying development processing to a RAW image according to the first setting, and performs control to record the developed image on a storage medium. In a case when the first setting is a setting corresponding to a high dynamic range and the second setting is a setting corresponding to a dynamic range different from the high dynamic range, control is performed to record the developed image and meta information corresponding to the second setting on the storage medium in association with each other.