Image Processing Apparatus Resolution Detection
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Solution Overview
Problem
Image display apparatuses fail to determine whether an inputted image signal is up-converted or high-definition, leading to inappropriate image processing, as they do not accurately assess the original image resolution, resulting in suboptimal effects for both up-converted and standard-definition signals.
Innovation Solution
An image processing apparatus that includes an image quality improvement unit, a resolution deciding unit, and a control unit, which compares pre-processing and post-processing image data to determine the original image resolution and adjusts image quality improvement processing accordingly, using specific parameter values for HD or SD signals, and performs feedback control to stabilize output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If image processing is executed without determining the original image resolution, then the processing can be applied to all input signals, but the processing effects are inappropriate for both up-converted and HD signals
Solution Approach 1:
The patent implements feedback control by comparing the input image signal with the output image signal after processing, detecting changes in high-frequency components, and automatically adjusting the image processing parameters accordingly. This closed-loop feedback mechanism enables the system to adaptively determine whether the input is an up-converted or HD signal and apply appropriate processing, resolving the contradiction between universal compatibility and processing quality.
Solution Approach 2:
The patent changes processing parameters based on the detected signal characteristics. By monitoring high-frequency component changes before and after processing, the system dynamically adjusts processing intensity and type according to whether the input is an up-converted signal or HD signal, thereby maintaining high processing quality across different signal types while preserving original image characteristics.
2Measurement precision
If high-pass filter processing and enlargement rate determination are executed to determine up-conversion, then the resolution detection capability is improved, but the processing time increases significantly
Solution Approach 1:
The patent extracts only the essential feature for resolution detection - the high-frequency component characteristics - and uses this extracted information for determination. By focusing on high-frequency components rather than executing complete high-pass filter processing and enlargement rate calculations, the system achieves accurate resolution detection with significantly reduced processing time, eliminating unnecessary computational steps.
Solution Approach 2:
The patent performs preliminary analysis of high-frequency components in the input signal before executing full image processing. By pre-detecting signal characteristics and determining the signal type early in the processing pipeline, the system avoids time-consuming post-processing determination steps, thereby reducing overall processing time while maintaining detection accuracy.
3Power
If image processing corresponding to HD signal is executed on up-converted signals, then the processing intensity is sufficient, but the original low-resolution characteristics are not preserved resulting in inappropriate effects
Solution Approach 1:
The patent implements dynamic adjustment of processing intensity based on the detected signal type. The system continuously monitors high-frequency component characteristics and automatically modulates the strength and type of image processing applied. For up-converted signals, the processing intensity is reduced to preserve original low-resolution characteristics, while for HD signals, full processing intensity is applied, thereby preventing information loss while maintaining appropriate processing power.
Data Source
AI summary
An image processing apparatus includes: an image quality improvement processing unit which is supplied with an image signal corresponding to an original image from an image supply device, executes image quality improvement processing to first image data based on the image signal and thus generates second image data; a resolution deciding unit which compares the first image data with the second image data and thus decides resolution of the original image; and a control unit which controls the image quality improvement processing unit according to the resolution of the original image decided by the resolution deciding unit and thus adjusts the image quality improvement processing.