Signal Processing Device Frequency Component Adjustment
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Solution Overview
Problem
Conventional signal processing methods for adjusting image sharpness are complex and burdensome for users, as they require manual adjustment of multiple parameters to balance high and low-frequency components, leading to increased operational complexity and difficulty in achieving optimal image quality.
Innovation Solution
A signal processing device with a signal processing unit that includes a first and second filter processing section, where the filter processing control unit calculates the adjustment magnification for one filter processing section based on the total gain adjustment rate, allowing for simple adjustment of frequency components by combining the two filter processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple filter processing sections are used to adjust frequency components, then image sharpness adjustment flexibility is improved, but device complexity and user operation burden increase
Solution Approach 1:
The system automatically calculates and determines the adjustment magnifications for multiple filter processing sections based on the total gain adjustment rate, eliminating the need for users to manually configure multiple parameters. The control section performs self-service by computing the individual filter magnifications (e.g., using square root decomposition where if total rate is R, then each filter uses √R) rather than requiring user input for each parameter.
Solution Approach 2:
The invention changes the parameter control approach from requiring multiple independent user inputs to using a single total gain adjustment rate parameter. By mathematically deriving individual filter magnifications from this single parameter, the system maintains flexible frequency component adjustment while simplifying the interface to require only one user input value.
2Measurement precision
If manual adjustment of multiple parameters is required, then frequency component control precision is improved, but ease of operation deteriorates
Solution Approach 1:
The control section automatically computes the precise adjustment magnifications for each filter processing section by performing mathematical calculations based on the user-provided total gain adjustment rate. This self-service computation ensures precise frequency component control without burdening the user with manual parameter configuration.
Solution Approach 2:
The invention segments the total gain adjustment rate into multiple individual filter adjustment magnifications that can be applied across different filter processing sections. By decomposing the single user input parameter into multiple computationally-derived parameters, the system achieves both operational simplicity and precise frequency control.
3Ease of manufacture
If integer multiple emphasis is applied uniformly, then processing simplicity is improved, but manufacturing precision of image quality deteriorates
Solution Approach 1:
The invention changes from uniform integer multiple emphasis to frequency-specific continuous parameter control. Each filter processing section can apply different magnifications derived from the total gain adjustment rate, enabling precise control over high-frequency and low-frequency components separately rather than applying a single uniform emphasis factor.
Solution Approach 2:
The system applies different adjustment magnifications to different frequency components through multiple filter processing sections. By deriving individual magnifications from the total gain adjustment rate, each filter can be optimized for its specific frequency range, achieving local quality control rather than uniform processing.
Data Source
AI summary
There are provided a signal processing device, an imaging apparatus, a parameter generating method, a signal processing method, and a program that enable desired frequency component adjustment without complicating the processing. An image processing unit 35 includes a signal processing section that adjusts a signal according to a frequency and a filter processing control section 37 (automatic strength adjustment section 52) that controls the signal processing section. The signal processing section includes a first filter processing section 38 that performs first filter processing and a second filter processing section 39 that performs second filter processing. The automatic strength adjustment section 52 acquires the adjustment magnification (first gain adjustment magnification U and second gain adjustment magnification V) in one of the first filter processing and the second filter processing, and calculates the adjustment magnification in the other processing based on a total gain adjustment rate D.