Intra-field Interpolation for Deinterlacing Vertical Resolution and Motion Artifacts
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Solution Overview
Problem
Intra-field deinterlacing methods fail to enhance vertical resolution and often produce jagged pictures, especially when dealing with video frames containing motion, as they rely solely on interpolating from existing pixel values within a single field without incorporating information from the second field.
Innovation Solution
An intra-field interpolation method that generates target pixel values by receiving pixel values from an image field, calculating first and second pixel difference sets using specific algorithms, and blending these values to produce accurate interpolated pixels, thereby enhancing image resolution and reducing motion artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inter-field deinterlacing techniques are used to merge data from both fields, then vertical resolution is improved, but motion artifacts appear when objects move between fields
Solution Approach 1:
The patent applies local quality by using motion detection to identify regions with motion and applying different deinterlacing strategies to different regions. Static regions use inter-field blending for high resolution, while motion regions use intra-field interpolation to avoid artifacts, creating locally optimized quality throughout the image
Solution Approach 2:
The patent implements dynamics by dynamically switching between inter-field and intra-field deinterlacing methods based on detected motion. The system adapts its processing approach in real-time based on the content of each region, transitioning between methods rather than using a fixed approach
2Object-generated harmful factors
If intra-field deinterlacing techniques are used to avoid motion artifacts, then motion handling is improved, but vertical resolution is not enhanced and jagged edges appear
Solution Approach 1:
The patent merges the advantages of both intra-field and inter-field deinterlacing by combining their outputs through weighted blending. The final pixel values are computed by merging results from motion-compensated interpolation and simple intra-field interpolation, achieving both artifact reduction and resolution enhancement
Solution Approach 2:
The patent creates a composite deinterlacing solution by combining multiple processing approaches. The final output is a composite of different interpolation methods weighted according to local image characteristics, similar to how composite materials combine different substances to achieve superior properties
3Device complexity
If simple vertical interpolation is used for intra-field deinterlacing, then processing complexity is reduced, but jagged edges appear along diagonal lines
Solution Approach 1:
The patent addresses diagonal edge artifacts by introducing angular interpolation that considers diagonal directions. Instead of only vertical interpolation, the method calculates pixel values along diagonal angles, adding a directional dimension to the interpolation process that naturally handles diagonal edges better
Data Source
AI summary
An intra-field interpolation method and apparatus for generating a target pixel value. The method includes the following steps of: receiving a plurality of pixel values of an image field; generating a first pixel difference set from the received pixel values using a first pixel difference algorithm; generating a second pixel difference set from the received pixel values using a second pixel difference algorithm; and blending the received pixel values according to the first pixel difference set and the second pixel difference set, to generate the target pixel value.