Image Display Signal Processing for Contrast-Linked Sharpness Control
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Solution Overview
Problem
Performing contrast processing after sharpness processing in image display apparatuses can lead to noise amplification, particularly in low gray level areas, and a decrease in sharpness in high gray level areas.
Innovation Solution
The image display apparatus performs dynamic contrast processing after sharpness processing, adjusting the sharpness based on the amount or slope of contrast amplification, and includes a signal processing device that decreases or increases sharpness strength accordingly to mitigate noise amplification and improve sharpness in different gray level areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dynamic contrast processing is performed after sharpness processing, then contrast is improved, but noise amplification occurs and sharpness decreases in certain areas
Solution Approach 1:
The patent applies dynamics by making the sharpness processing strength adjustable based on the processing stage. The system dynamically adjusts the sharpness strength to be lower after contrast processing compared to before contrast processing, resolving the contradiction between improving contrast and preventing noise amplification.
Solution Approach 2:
The patent changes the parameter of sharpness processing strength based on the processing sequence. By modifying the sharpness strength parameter according to whether it is applied before or after contrast processing, the system achieves both contrast improvement and noise control.
2Manufacturing precision
If sharpness processing strength is increased, then sharpness is improved, but noise amplification increases
Solution Approach 1:
The system dynamically adjusts sharpness processing strength based on the processing stage. By applying different sharpness strengths at different stages (lower after contrast processing), the system maintains sharpness while controlling noise amplification.
Solution Approach 2:
The patent applies different sharpness processing strengths at different processing stages. This local differentiation of processing quality allows the system to optimize sharpness in early stages while controlling noise in later stages.
Data Source
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AI summary
The present disclosure relates to an image display apparatus. The image display apparatus according to an embodiment of the present disclosure includes: a display; and a signal processing device to output an image signal to the display, wherein the signal processing device is configured to perform dynamic contrast processing after performing sharpness processing of the image signal, and adjust the sharpness of the image signal based on the amount or slope of amplification of contrast by the dynamic contrast processing. Accordingly, noise amplification can be reduced, or sharpness can be improved.