Directional analysis of 2D images — ImageJ/Fiji plugins

---

Daniel Sage · Center for Imaging and Biomedical Imaging Group, Ecole Polytechnique Fédérale de Lausanne (EPFL)

August 2026

---

Installation

ImageJ or Fiji

1. Download OrientationJ_.jar (version 2.1.0; older versions on the releases page).
2. Copy it into the plugins folder of your ImageJ or Fiji installation.
3. Restart. The commands appear under Plugins ▸ OrientationJ.

Java version

The plugin is built for Java 8 or later, so it runs on every current ImageJ and Fiji distribution.

Checking the installation

Run Plugins ▸ OrientationJ ▸ Test Image ▸ Chirp Image Small to generate a chirp, then Plugins ▸ OrientationJ ▸ OrientationJ Analysis on it. In the color survey the hue must follow the local stripe direction everywhere, turning smoothly around the center of the pattern.

From source

git clone https://github.com/Biomedical-Imaging-Group/OrientationJ.git
cd OrientationJ
mvn package

The plugin lands in target/OrientationJ_-<version>.jar; copy it into the plugins folder as above. The build needs Maven and a JDK (8 or later).