High Frequency Emphasis Control via Discrete Fourier Transform Feedback
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Solution Overview
Problem
Users of image display devices face difficulties in manually setting appropriate emphasis amounts for high frequency components, often resulting in over- or under-emphasis, making it cumbersome to achieve optimal image sharpness.
Innovation Solution
A high frequency emphasis amount control device that includes discrete Fourier transform units, weighting calculators, and an emphasis amount controller to automatically adjust the emphasis of high frequency components based on calculated emphasis ratios, ensuring appropriate emphasis amounts are applied to input image signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual setting of emphasis amount is used, then user can control image sharpness, but operation becomes cumbersome and appropriate emphasis is difficult to achieve
Solution Approach 1:
The system automatically calculates the emphasis amount based on the input image signal without requiring manual user input. The emphasis amount calculation unit computes the appropriate emphasis level by analyzing the image signal itself, allowing the system to serve itself rather than requiring continuous user intervention for setting the emphasis amount.
Solution Approach 2:
The system provides feedback to the user about the calculated emphasis amount and allows adjustment based on user feedback. The emphasis amount calculation unit computes an initial value automatically, then the feedback mechanism enables users to review and adjust this value if needed, combining automated precision with user control.
2Ease of operation
If automatic emphasis amount calculation is implemented, then operation becomes simple, but device complexity increases
Solution Approach 1:
The system replaces manual mechanical adjustment with automated computational processing. Instead of requiring users to manually adjust emphasis parameters, the emphasis amount calculation unit uses signal processing algorithms to automatically compute the appropriate emphasis amount based on the input image signal characteristics.
Solution Approach 2:
The system dynamically changes the emphasis amount parameter based on the characteristics of the input image signal. The emphasis amount calculation unit analyzes the image signal and adjusts the emphasis parameter accordingly, allowing the system to adapt to different image content automatically without requiring complex user interfaces or multiple control mechanisms.
Data Source
AI summary
A first discrete Fourier transform unit generates a first frequency spectrum by two-dimensional discrete Fourier transform of an input image signal. A second discrete Fourier transform unit generates a second frequency spectrum by two-dimensional discrete Fourier transform of an output image signal output from a high frequency emphasis circuit. A first and second high frequency component index generators generate a first and second high frequency component indices indicating a total amount of high frequency components based on the first and second frequency spectra, respectively. A high frequency component emphasis ratio calculator calculates a high frequency component emphasis ratio which is a ratio between a first high frequency component index and a second high frequency component index. An emphasis amount controller generates an emphasis amount control value based on a high frequency component emphasis ratio and a target emphasis ratio, and supplies it to the high frequency emphasis circuit.