Display Device Image Processing for HDR Brightness Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices struggle to accurately express high dynamic range (HDR) images without image quality processing, leading to unnatural images due to brightness limitations.
Innovation Solution
An image processing method that measures the brightness expression performance of a display device, divides it into regions, and adjusts the brightness of input images to match the display's capabilities, ensuring the image is displayed within the device's dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If HDR images with high brightness levels are displayed directly on display devices without image quality processing, then the brightness range of the image is preserved, but the display device cannot accurately express the image due to brightness limitations, resulting in unnatural images
Solution Approach 1:
The patent applies parameter changes by adjusting the brightness values of image pixels through tone mapping processing. The input image with high brightness range is transformed by modifying pixel brightness parameters to match the display device's brightness capabilities, thereby resolving the contradiction between preserving brightness range and achieving accurate image expression.
2Manufacturing precision
If tone mapping technology is applied to adjust image brightness for display device capabilities, then image expression accuracy is improved, but image details may be lost and color agglomeration may occur
Solution Approach 1:
The patent implements partial action by selectively adjusting only certain pixel brightness values through tone mapping, rather than uniformly processing all pixels. This selective approach preserves important image details while achieving accurate brightness representation for the display device, thereby reducing information loss.
3Reliability
If the brightness of an input image is adjusted to match the display device's dynamic range, then the image can be displayed naturally without distortion, but the original brightness expression of the image is altered
Solution Approach 1:
The patent introduces tone mapping as an intermediary processing step between the input image and display device. This intermediary process transforms the image brightness characteristics to be compatible with the display device's dynamic range while maintaining visual naturalness, effectively mediating between the original image brightness information and the display capabilities.
Data Source
AI summary
A display device and an image processing method thereof are provided. An image processing method of a display device, according to the present disclosure, comprises the steps of: dividing a display unit of the display device into a plurality of regions; measuring brightness expression performance of the display device, including a value of a relation between the average brightness of the display unit and the brightness of one region among the plurality of regions; calculating an average brightness of an image inputted to the display device; mapping, to the measured brightness expression performance, the calculated average brightness of the inputted image; adjusting the brightness of a region, excluding an emphasized region, of the inputted image so as to generate an adjusted image; and outputting the adjusted image.