Adaptive Texture Filtering via Dynamic Mip-Map Sampling
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Solution Overview
Problem
Current graphics processing units (GPUs) face inefficiencies in texture filtering, particularly in selecting the optimal number of samples from mip-map layers, leading to increased processing workloads and power consumption.
Innovation Solution
The GPU selectively determines a first quantity of samples from a lower mip-map layer and a second quantity from a higher mip-map layer based on a relative distance, with the second quantity being less than the first, thereby reducing the total number of samples and filter taps required for texture filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed number of samples is used from both mip-map layers, then filtering quality is maintained, but processing workload and power consumption increase
Solution Approach 1:
The patent applies dynamics by making the number of samples adaptive rather than fixed. The system dynamically adjusts the number of samples taken from each mip-map layer based on the relative distance calculation, allowing the sampling strategy to change according to rendering conditions while maintaining filtering quality and reducing processing workload when appropriate
Solution Approach 2:
The patent changes the parameter of sample quantity from a static value to a dynamic value determined by relative distance. By calculating relative distance between texture sizes and using this to determine sample counts, the system optimizes the balance between filtering quality and processing efficiency through parameter adaptation
2Measurement precision
If more samples are taken from both mip-map layers, then filtering quality improves, but power consumption increases
Solution Approach 1:
The system changes the sample quantity parameter based on relative distance calculations, reducing power consumption by taking fewer samples when high filtering quality is not critically needed while maintaining quality when the relative distance indicates it is necessary
3Stability of the object's composition
If equal numbers of samples are taken from both mip-map layers, then filtering consistency is maintained, but processing efficiency decreases
Solution Approach 1:
The patent applies local quality by allowing different numbers of samples to be taken from different mip-map layers based on their respective contributions. Instead of uniform sampling, the system locally adapts the sample count for each layer according to the relative distance metric, improving processing efficiency while maintaining filtering consistency through targeted sampling
Data Source
AI summary
The present disclosure relates to methods and apparatus for graphics processing. In some aspects, the apparatus selects a first mip-map layer with a first texture size and a second mip-map layer with a second texture size based on a third texture size of an image. The apparatus also determines a relative distance associated with the texture sizes. Additionally, the apparatus determines a first quantity of samples to select from the first mip-map layer, and determines a second quantity of samples to select from the second mip-map layer, the second quantity of samples being less than the first quantity of samples, and a second quantity of filter taps being less than a first quantity of filter taps. Also, the apparatus generates the image at the third texture size through filtering based on the first quantity of samples and the second quantity of samples.