North America’s Largest Woodworking Event


Industry & Trends

VIDEO—Digitally Imaging Wood, Knots and All

Rendered images of solid wood from pine and spruce as well as plywood and cross-laminated timber (CLT) are shown.

Tokyo, Japan—Researchers at the University of Tokyo and other locations have developed a way to generate graphics that model the annual ring pattern of solid wood, along with natural elements like knots.

Although wood texturing is a well-studied topic, there have been few previous attempts at modeling knots inside the wood texture, according to a paper that will be delivered at Siggraph 2022, a global computer graphics conference taking place this summer in Vancouver. Given the presence of digital wood imaging technology at IWF 2022, as well as recent trends in 3D printed wood products, the new research may be applicable to the wood manufacturing industry.

The method takes the skeletal structure of a tree log as input, and produces a three-dimensional “scalar field,” which refers to the way the program incorporates the variable growth patterns of trees. The program can represent the times of added growth, which defines the volumetric annual ring pattern. Here’s the researchers’ summary of their approach:

First, separate fields are computed around each strand of the skeleton, i.e., the stem and each knot. The strands are then merged into a single field using smooth minimums. We further suggest techniques for controlling the smooth minimum to adjust the balance of smoothness and reproduce the distortion effects observed around dead knots. Our method is implemented as a shader program running on a GPU with computation times of approximately 0.5 s per image and an input data size of 600 KB. We present rendered images of solid wood from pine and spruce as well as plywood and cross-laminated timber (CLT). Our results were evaluated by wood experts, who confirmed the plausibility of the rendered annual ring patterns.


More Industry & Trend News

  • IWF Donates to MiLL Training Center

    January 17, 2023

  • What’s the Fed Going to Do Next with Rates?

    January 17, 2023

  • CES Debuts Are Now Much More than Just New TVs

    January 17, 2023

Get the latest industry news & IWF updates.

Subscribe Now

Terms & Privacy Policy

© 2020 International Woodworking Fair, LLC Terms of Use & Privacy Policy

3520 Piedmont Rd NE #350, Atlanta GA 30305 | (404) 693-8333

loading … please wait