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Topics - jdrunner

#1
Image Analysis / Ball-Stick Spatial Model
July 03, 2026, 08:25:09 PM
Good afternoon,

I had a question regarding the ball-stick option in Pore Analysis. I noticed the model assessed touching pores, as well as their representative equal diameter. We were curious if spatial distance between non-touching pores was also an option. We are wanting to get a planar spatial analysis of distance between pores to get a quantitative analysis of pore distribution in a 3D sense. If this is possible any information helps. Thank you.
#2
Good afternoon,

I have been utilizing Identify pores to help with pore analysis on one of my samples. Some of the pores weren't fully recognized in our scan, leading to holes in the segmented pores. When editing the settings of the Identify Pores module, I adjusted the fragmented pores reconnectivity near to the maximum to help mitigate issues, but they persisted.

Currently, multiple pores are being assigned to one in our segmented dataset. I was curious if there were other settings that could be altered to help alleviate these issues? Thank you.

Respectfully,
Jack Davis
#3
Hello,

I have worked on a dataset that I utilized a dilation function on and saved it. I now wish to go back to the undilated state, but simply undilating the features won't work since the structure features that were removed from dilation won't return.

Is there a way to find a previous version of the file? I am trying to avoid starting from the beginning of segmentation, since a lot of work was put into the dataset. Thank you.

Respectfully,
Jack Davis
#4
Hello,

I had a question regarding pore shape visualization. The identify pores scatter plot identifies 4 pore types, and the help guide shows representative visuals for the 4 types. We were curious if the pore types could be visualized in the dataset itself? Based on what I've seen, none of the pore visualizations represented this. Thank you.

Respectfully,
Jack Davis
#5
Hello,

I had a question regarding the algorithm used to determine the scatter plot for the Krumbein sphericity and the volume distribution.

With the scatter plot, I was curious if there were certain cutoffs used in the algorithm; it seems like maybe not all of our pores were analyzed. If there is a help section in the user guide that explains this could I receive guidance to it?

With regards to the volume distribution, analysis was made on our entire sample was well as 3 single pores. When the entire sample was analyzed, the histogram on the volume distribution matched the PoroDict analysis. However, when we analyzed only 3 (the largest pore and 2 other small ones), it did not match up at all. I was curious if there was a statistical explanation for why the analysis on the entire sample proved accurate but the analysis of just 3 pores was off. Thank you.

Respectfully,
Jack Davis
#6
CT, µCT and FIB-SEM / Surface Roughness Calculation
August 14, 2025, 01:57:24 AM
Good afternoon,

We were curious if GeoDict has a known module that uses the rendered 3D volume to calculate the surface roughness. Thank you.

Respectfully,
Jack Davis
#7
CT, µCT and FIB-SEM / Tortuosity on Curved Tube
July 30, 2025, 11:41:19 PM
Hello,

We have a segmented dataset with a tube that is straight up and down and a curved tube.

When we crop to only focus on the center tube, we get a tortuosity of approximately 1.004, which is consistent with the definition of tortuosity.

However, when we run the same diffusion simulation on the curved segment, we repeatedly get 1.001. We have tried to crop out part of the top section, clean up the sample, and erode the dataset to get a focused centerline for the path to follow. None of these changed the value from 1.001.

Are there any other methods to get an accurate result for tortuosity? Thank you.

Respectfully,
Jack Davis
#8
CT, µCT and FIB-SEM / Multi-Directional FiberFind
June 11, 2025, 04:00:50 PM
We are trying to obtain fiber length and count through the FiberFind (AI) module.

The fibers are multidirectional and have fairly high surface roughness.

The module is currently identifying what should be single fibers as multiple fibers, and some fibers are not getting identified at all. The threshold is currently set to 0.9

If we increase the threshold, the issue of multiple fibers attributed to 1 decreases, but so does the identification of fibers. The below image captures what we are currently dealing with.

[attachimg=1]
#9
I am trying to obtain the grayvalues attributed to a specific material ID so I can then create a histogram to visualize the distribution of grayvalues.

I tried running the code found here (https://geodict-userguide.math2market.de/2025/automation_api-results.html?anchor=getvolumefield) in a GeoApp.

[attachimg=2]

However, I received this error.
[attachimg=1]

The logic behind running this code was to get all the statistics attributed to a specific Material ID, and then index out the grayvalues.
#10
Hello,

I am trying to create/find a histogram showing the grayscale values of a multi-material sample post segmentation. The sample was segmented using Geodict AI. The segmentation contains 2 material ID's of interest. I was curious if there was a way to obtain a histogram of each material's grayscale values (desired to look at the mean and mode of grayscale values for each material). Thank you.

Respectfully,
Jack Davis