Acoustic tomograph

• Tool for fast stem inspection
• Provides global information across the whole cross section
• Green part - high sound speed value - sound wood
• Shows size and shape of internal defects

Resistograph

• Measures the power required for microdrilling at a fixed speed
• Provides local mechanical properties of the material
• Note short(!) valleys: the central cavity hypotheses is not accepted
• Projection of the data to the stem cross section would reveal details of the defect

Data in cross section geometry

• Transform resistograph data into 2D cross-section geometry
• Two types of visualization
  • curves
  • color scale
• Written as Python library
• Published on GitHub

Merge data

• Resistograph data in a tomogram
• Increases the accuracy of data interpretation
• The dark strips allow to localize the defect
• In our case the hypotheses have been confirmed by detailed inspection after felling the tree

Python library

Advantages

Python library

Limitations

Streamlit

Vibe coding

• Code written by AI (LLM)
• ChatGPT 5 in August 2025
• Web app produced in two prompts

I have the following library. Write 
a streamlit program that allows you 
to upload a zipped directory with data 
and run commands corresponding to 
the main function on it. 
The output will be displayed.

OK. I want to be able to change 
the preset options in the left panel.

Docker

• In some fields, the "compute capsule" is submitted together with the manuscript (Code Ocean).

Run dockerized app

docker compose up

Summary

• Resistograph and tomograph are complementary tools for tree inspection