Frequency Lifting for UD Display Detail Enhancement
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Solution Overview
Problem
Ultra-high definition (UD) displays struggle to maintain image quality when viewing lower resolution content, as regular image upscaling or interpolation fails to provide sufficient sharpness and fine details, leading to degraded image quality.
Innovation Solution
A method involving a processor device that determines enhancement information based on frequency characteristics of input images, shifts transform coefficients to center the zero-frequency origin, lifts frequency components to higher locations, and performs inverse transformations to create enhanced image blocks, which are then combined to generate images with improved details.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If regular image upscaling or interpolation is used to display lower resolution content on UD devices, then the content can be displayed, but the image sharpness and fine details are insufficient, leading to degraded image quality
Solution Approach 1:
The patent transforms the image processing from spatial domain to frequency domain using wavelet transform. By operating in the frequency domain and then lifting frequencies to higher positions, the method creates additional detail information that enhances image sharpness and fine details, resolving the contradiction between display capability and image quality
Solution Approach 2:
The patent changes the frequency parameters of the image by lifting frequencies to higher positions in the wavelet domain. This parameter transformation creates new high-frequency components that correspond to fine details and sharp edges, thereby improving image sharpness and overall image quality when displaying lower resolution content on UD devices
2Adaptability or versatility
If lower resolution content (SD, HD, FHD) is displayed on UD devices, then content availability is maintained, but image quality degradation occurs due to insufficient detail
Solution Approach 1:
The patent creates a universal image enhancement method that works across multiple resolution standards (SD, HD, FHD, and UD). The wavelet-based frequency lifting technique is resolution-agnostic and can be applied to any lower resolution content to enhance its quality when displayed on UD devices, achieving both content compatibility and improved image detail quality
Solution Approach 2:
By transitioning to the frequency domain through wavelet transform, the patent enables a multi-resolution compatible enhancement approach. The frequency lifting operation works independently of the original spatial resolution, allowing the same method to enhance various content types (SD, HD, FHD) universally while maintaining adaptability to different display resolutions including UD
3Manufacturing precision
If frequency lifting is applied to enhance image details, then image sharpness and fine details are improved, but processing complexity increases
Solution Approach 1:
The patent segments the image processing into distinct stages: wavelet transform to frequency domain, frequency lifting operation, and inverse wavelet transform back to spatial domain. This segmentation allows each stage to be optimized independently and enables parallel processing of different frequency subbands, reducing overall processing complexity while maintaining improved image sharpness and fine details
Data Source
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AI summary
One or more embodiments relate generally to ultra-high definition displays, and in particular, to creating details in lower resolution images with frequency lifting for display on a UD display or device. A method comprises receiving input image information, using a processor device for determining enhancement information based on frequency characteristics of the input image information, and mixing the enhancement information with the input image information to generate an enhanced image.