Curved Intra Prediction for High-Resolution Image Coding
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Solution Overview
Problem
Conventional intra prediction methods are limited by the use of only straight-directional prediction, which hinders the enhancement of encoding efficiency for high-resolution and high-quality images.
Innovation Solution
Incorporating curved intra prediction modes that include information on intra prediction direction, reference pixel position, and curvature or weight parameters, allowing for improved encoding and decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If only straight-directional prediction is used in conventional intra prediction, then the method is simple to implement, but encoding efficiency cannot be enhanced for high-resolution and high-quality images
Solution Approach 1:
The patent applies curved intra prediction modes that use curved lines instead of straight lines for prediction. The curved prediction modes include curvature parameters to define the curvature of the prediction line, allowing the prediction to follow curved edges and contours in the image, which better matches natural image structures and improves encoding efficiency for high-resolution images
Solution Approach 2:
The patent introduces additional parameters for curved prediction modes, including curvature parameters and weight parameters. These parameters allow the prediction method to adapt to different image characteristics by changing the curvature and weighting of reference pixels, thereby enhancing encoding efficiency without being limited to fixed straight-directional prediction
2Productivity
If curved intra prediction modes are incorporated with curvature and weight parameters, then encoding and decoding efficiency is enhanced, but the complexity of prediction mode information increases
Solution Approach 1:
The patent performs preliminary classification to determine whether a current block should use curved intra prediction mode before applying the full curved prediction process. This preliminary action helps to reduce the overall complexity by only applying the more complex curved prediction where it is beneficial, rather than universally applying it to all blocks
Solution Approach 2:
The patent applies different prediction modes to different regions or blocks within an image based on local characteristics. Curved intra prediction modes are applied selectively to blocks that benefit from curved prediction, while other blocks may use simpler prediction modes, thereby optimizing decoding efficiency locally without uniformly increasing complexity across the entire image
Data Source
AI summary
The present invention relates to an intra prediction method and apparatus. The image decoding method according to the present invention may comprise decoding information on intra prediction; and generating a prediction block by performing intra prediction for a current block based on the information on intra prediction. The information on intra prediction may include information on an intra prediction mode, and the intra prediction mode may include a curved intra prediction mode.