HDR Image Display Luminance Mapping for Display-Limited Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image display apparatuses struggle to effectively convert and display high dynamic range (HDR) images to match the luminance and color characteristics of the display, leading to suboptimal viewing experiences.
Innovation Solution
An image display apparatus with a controller that adjusts luminance, color, and contrast information based on input HDR images and display capabilities, performing dynamic range mapping and adaptive luminance adjustments to match the creator's and viewer's intentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If HDR images with wide brightness range are displayed directly, then the dynamic range and brightness information are preserved, but the luminance cannot be matched to the display capabilities
Solution Approach 1:
The controller performs luminance mapping by changing the luminance parameters of the HDR image to match the display's capabilities. It extracts maximum luminance information from the HDR image and applies tone mapping curves to transform the luminance values into a range that the display can reproduce, thereby resolving the contradiction between preserving brightness range and adapting to display luminance constraints.
2Adaptability or versatility
If luminance mapping is performed to match display capabilities, then the luminance is adapted to the display, but the original HDR brightness information is lost
Solution Approach 1:
The controller performs preliminary extraction of maximum luminance information from the HDR image before applying tone mapping. By pre-processing the image to identify and preserve critical luminance data, the system can then apply luminance mapping while retaining essential brightness information, thus reducing information loss while achieving display adaptation.
3Productivity
If simple luminance mapping is applied, then the processing is fast and simple, but the viewing experience is suboptimal
Solution Approach 1:
The controller dynamically adjusts the tone mapping parameters based on the extracted maximum luminance information and the specific display capabilities. Rather than using a fixed mapping approach, the system adapts the mapping curve in real-time to optimize the viewing experience for different HDR images and display devices, thereby improving viewing quality without significantly compromising processing speed.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is an image display apparatus. The image display apparatus includes a display, an image receiver to receive a high dynamic range image, and a controller to set luminance information of an image to be displayed based on brightness information of the high dynamic range image and information about a luminance that is displayable on the display and to perform control to display an image having a luminance adjusted based on the set image luminance information. Accordingly, the image display apparatus is capable of converting and displaying the high dynamic range image so as to match the luminance that is displayable on the display.