Directionality Explorer · Fiji plugin port

Directionality Explorer

Quantify dominant orientations in microscopy, materials, or aerial textures using a real-time, in-browser port of Fiji Directionality. Switch between basic and advanced modes, compare multiple frames, and export the full analysis bundle in one place.

Gradient + structure tensor analysis Real-time histogram + orientation map CSV + PNG export bundle

Active image None loaded

Resolution —

Dominant angle —

Input

Load a single image Load a folder

Supported formats: PNG, JPG, GIF, TIFF. Folder mode keeps your analysis settings in place.

Workflow

Real-time analysis Advanced mode

Disable real-time mode to stage multiple tweaks before re-running the analysis.

Core controls

Method Matches Fiji Directionality’s analysis modes. Fourier uses a gradient-based proxy in the browser. Angle range Axial treats 0° and 180° as the same direction. Bins (36) Gradient threshold (0) Filters weak edges before building the histogram.

Advanced controls

Pre-smoothing sigma (1.0)

Tensor smoothing (2.0)

Tensor window (5)

Downsample (1×)

Every advanced control has its own reset. Use the global reset button to restore Fiji defaults.

Histogram-only tuning

Weighting Histogram smoothing (1) Normalize histogram Fourier window (smoothing proxy)

These controls reshape the histogram only. The orientation map always reflects core and advanced settings.

Analysis preview

Grayscale base with color direction overlays stays visible while you tweak settings.

Base opacity 0.85 Overlay opacity 0.85 Underlay Light mode

Orientation overlay

Dominant angle — Highest histogram bin

Mean direction — Vector-averaged axis

Dispersion — 1 = random, 0 = aligned

Coherence — Mean vector length

Top bin (°)	Energy	Normalized

Showing the strongest bins only. Export CSV for the full histogram.

Directionality Explorer

Analysis preview

Orientation overlay

Directionality histogram

Results