Image Sharpness Gain Control via Localized Region Processing
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Solution Overview
Problem
Existing image processing systems face challenges in enhancing image sharpness without emphasizing noise, particularly at the image center, which can lead to a fuzzy or awkward screen due to excessive sharpness improvement.
Innovation Solution
An apparatus that includes a sensor unit, a detection unit to identify edge components, and a synthesis unit to apply different sharpness gains based on image position, synthesizing smaller gains at the center and larger gains at the periphery, or dividing edge components into frequency bands for tailored sharpness adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniform sharpness gain is applied to the entire image, then sharpness is improved across the image, but noise is emphasized and the center becomes excessively sharp and fuzzy
Solution Approach 1:
The patent applies different sharpness gain values to different regions of the image. Specifically, it uses a first sharpness gain for a first region (typically the center) and a second sharpness gain for a second region (typically the periphery), where the gains are different. This local differentiation allows the center to be sharpened with a conservative gain to avoid noise emphasis, while the periphery receives stronger sharpening, thereby resolving the contradiction between overall sharpness improvement and noise control.
2Manufacturing precision
If sharpness is increased at the periphery of the image, then edge definition is improved, but noise components are emphasized simultaneously
Solution Approach 1:
The patent implements region-specific sharpness processing by dividing the image into multiple regions with different sharpness gain characteristics. The periphery regions receive enhanced sharpness through appropriate gain application, while the center region uses a different gain strategy that prevents noise amplification. This localized approach enables edge definition improvement without simultaneous noise emphasis throughout the entire image.
Data Source
AI summary
An apparatus for increasing sharpness is provided. The apparatus according to an exemplary embodiment of the present disclosure can improve sharpness of an image by applying different sharpness gains to a center of the image and to a periphery of the image.