Center for Quantification of Imaging Data

Felipe Delestro
fima@dtu.dk

Sample

Projections

Detections

Image

Information

Publication

Sample

Projections

Detections

Image

Information

Publication

imaging

reconstruction

segmentation

quantification

interpretation

https://qim.dk/

Repository:

https://github.com/Skielex/structure-tensor

In the context of volumetric (3D) image analysis, a structure tensor is a 3-by-3 matrix which summarizes orientation in a certain neighborhood around a certain point.

The general idea is to measure the orientation of the structures in the 3D volume

A symmetric positive semidefinite matrix that encodes the predominant orientation and the degree of anisotropy in an image window.

With slightly simplified notation:

where Ix and Iy denote partial derivatives, and Σw denotes weighted sum over some fixed windowing function.

Repository:

https://github.com/vedranaa/local-thickness

For an object in 3D, the local thickness at any point of the object is defined as the radius of the largest sphere which fits inside the object and contains the point

The general idea is to quantify the thickness of your structures in the 3D volume

For an object in 3D, the local thickness at any point of the object is defined as the radius of the largest sphere that fits within the object and contains the point.

Two main projects

https://platform.qim.dk/

Qim3D command line interface

After pip install qim3d, the user is able to use some of the functionalities by a simple CLI

qim3d

http://tinyurl.com/esrf-qim

notebooks for tutorial:

pip install qim3d

pip install structure-tensor