Electronic Device Tone Mapping HDR to SDR Preview
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices often fail to display high dynamic range (HDR) image content correctly due to limitations in their brightness range, leading to quality-degraded images when they cannot support the maximum brightness values of the content.
Innovation Solution
The electronic device obtains information about the maximum brightness of the image content from metadata, performs tone mapping on frames to adjust the brightness to a range supported by the device, and generates a preview image based on this process, effectively converting HDR content to a standard dynamic range (SDR) for proper display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If HDR image content with high maximum brightness is displayed on a device with limited brightness range, then the device cannot support the full dynamic range, but displaying the content directly causes color and grayscale distortion
Solution Approach 1:
The patent applies parameter changes by modifying the brightness parameters of the image content through tone mapping. The processor obtains maximum brightness information from metadata and adjusts the brightness values of pixels to fit within the display device's supported range, thereby resolving the contradiction between HDR brightness range and device limitations while maintaining image quality
Solution Approach 2:
The patent introduces tone mapping as an intermediary process between the HDR image content and the display device. This intermediary transformation converts the high dynamic range content into a format suitable for the device's brightness capabilities, preventing direct distortion while preserving visual fidelity
2Manufacturing precision
If tone mapping is performed on all frames of HDR content, then image quality is maintained, but processing time and computational resources increase
Solution Approach 1:
The patent applies partial action by performing tone mapping selectively rather than uniformly on all frames. The processor determines whether tone mapping is needed based on whether the display device supports the maximum brightness of the image content, and applies the transformation only when necessary, thereby reducing unnecessary processing time while maintaining image quality where needed
Data Source
AI summary
Disclosed is an electronic device including a memory and a processor electrically connected with the memory. The memory stores instructions that, when executed, cause the processor to control the electronic device to: obtain information about a maximum value of brightness of image content based on metadata of the image content, to perform tone mapping on at least one or more frames corresponding to a preview image of the image content based on the information about the maximum value of the brightness, and to output the preview image based on the at least one or more frames on which the tone mapping is performed, on a display device.