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Related Concept Videos

Shape and Texture of Coarse Aggregate01:25

Shape and Texture of Coarse Aggregate

Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...
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When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
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State Space Representation01:27

State Space Representation

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Sampling Theorem

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Fischer Projections02:18

Fischer Projections

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Related Experiment Video

Updated: Jun 20, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
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Bidirectional texture function modeling: a state of the art survey.

Jirí Filip1, Michal Haindl

  • 1Pattern Recognition Department, Institute of Information Theory and Automation of the AS CR, Praha, Czech Republic. jiri.filip@utia.cz

IEEE Transactions on Pattern Analysis and Machine Intelligence
|September 19, 2009
PubMed
Summary

Bidirectional Texture Functions (BTFs) capture material appearance under varying light and viewpoints. This survey reviews recent advances in BTF measurement, compression, modeling, and rendering for computer vision applications.

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Last Updated: Jun 20, 2026

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Area of Science:

  • Computer Vision and Graphics
  • Material Appearance Modeling

Background:

  • Real-world material appearance varies significantly with illumination and viewing angles.
  • Accurate material representation requires capturing reflectance across diverse light and camera positions.
  • Bidirectional Texture Functions (BTFs) offer a comprehensive approach to material appearance.

Purpose of the Study:

  • To categorize and critically survey existing methods for Bidirectional Texture Functions (BTFs).
  • To psychophysically compare different BTF approaches.
  • To highlight recent advancements in BTF measurement, compression, modeling, and rendering.

Main Methods:

  • Systematic categorization of BTF techniques.
  • Critical review of published literature on BTF.
  • Psychophysical comparison of BTF methods.

Main Results:

  • Emergence of practical methods for BTF measurement, compression, modeling, and rendering.
  • Identification of key challenges and advancements in the field.
  • Comparative analysis of different BTF approaches.

Conclusions:

  • BTF technology is maturing, enabling wider practical applications.
  • Further research is needed to optimize BTF methods for real-world use.
  • This survey provides a foundational overview of the emerging BTF field.