Image Processing Apparatus Seamless SDR HDR Luminance Mapping
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Solution Overview
Problem
Display devices capable of processing both SDR and HDR video signals face switching issues that can cause user dissatisfaction due to temporary blackouts or delays when switching between different luminance ranges, especially when displaying mixed SDR and HDR content.
Innovation Solution
An image processing apparatus that acquires meta data from the display device for color correction and luminance range mapping, allowing it to output SDR images as HDR signals, eliminating the need for switching between luminance ranges and ensuring seamless display without delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switching process is performed in the display device to handle both SDR and HDR videos, then the display device can process different luminance ranges, but the user experiences temporary blackouts or delays during switching
Solution Approach 1:
The image processing apparatus performs the luminance range conversion in advance before outputting the image data. By converting SDR images to HDR signals (or vice versa) before display, the display device receives data already adapted to its current luminance range, eliminating the need for real-time switching and preventing display interruptions.
2Adaptability or versatility
If a switching process is performed in the display device, then the display device can handle both SDR and HDR content, but the user feels uneasy due to visible switching processes on the display screen
Solution Approach 1:
The conversion from SDR to HDR luminance range is performed in advance by the image processing apparatus before the image data reaches the display device. This preliminary conversion ensures that the display device operates in a single luminance range mode without needing to switch, thereby eliminating visible switching artifacts and providing a seamless user experience.
3Device complexity
If the display device performs the correcting process internally, then the display device maintains flexibility, but the image processing apparatus cannot pre-process images for seamless display
Solution Approach 1:
The image processing apparatus extracts and performs the luminance range conversion function that would otherwise be handled by the display device. By taking out this processing task from the display device and performing it in advance in the image processing apparatus, the system achieves both seamless display (improved reliability) and maintains the display device's internal processing capabilities for other functions.
Data Source
AI summary
An image processing apparatus for generating data of an image and outputting the generated data to a display device, includes a meta data acquiring unit configured to acquire meta data used for a correcting process for correcting the image in the display device, a corrector configured to perform at least part of the correcting process on the image, using the meta data, and an image output unit configured to acquire data of the corrected image from the corrector and output the acquired data to the display device.