Dynamic Look-Up Table for Flicker-Free Image Scaling
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Solution Overview
Problem
Conventional image scaling methods during scrolling cause visual discomfort and image flickering due to the use of fixed point deletion or addition techniques, which do not adapt to the changing visual field, leading to poor image quality.
Innovation Solution
An image data processing apparatus and method that detects the scrolling direction and generates a dynamic look-up table based on a ratio signal, with a starting reference point that varies over time, using directional and line difference signals to scale the image smoothly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed point deleting or adding method is used for image scaling during scrolling, then the image scaling can be implemented, but the image quality deteriorates with flickering and visual discomfort
Solution Approach 1:
The patent applies the dynamics principle by making the look-up table dynamic instead of static. The look-up table is updated in real-time based on the scrolling direction and line difference signals, allowing the image scaling to adapt to the changing visual field during scrolling. This dynamic adjustment eliminates the flickering effect caused by fixed point deletion while maintaining smooth image scaling.
2Device complexity
If fixed point process is used for image scaling, then the processing is simple, but the image stability deteriorates during scrolling causing flickering
Solution Approach 1:
The patent implements feedback by using the scrolling direction signal and line difference signal to continuously update the look-up table. The system monitors the scrolling state and adjusts the image scaling parameters in real-time, creating a closed-loop control mechanism that maintains image stability during scrolling while keeping the processing relatively simple.
3Ease of operation
If the look-up table starting reference point is fixed, then the processing is straightforward, but the image quality deteriorates due to mismatch with changing visual field
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the starting reference point of the look-up table based on the scrolling direction and line difference. Instead of using a fixed reference point, the system modifies the reference point parameter in real-time to match the changing visual field, thereby maintaining high image quality during scrolling operations.
Data Source
AI summary
An image data processing apparatus for detecting a scrolling direction of a first image thereto scaling the first image simultaneously is disclosed. The image data processing apparatus includes an image detecting module and a scaling module. The image detecting module is used for extracting an eigenvalue of the first image and its scrolling detection thereto outputs a directional signal and a line difference signal. The scaling module receives a ratio signal, the directional signal, and the line difference signal thereto outputs a second image accordingly.