Lantern Scanner

Plotly/Dash visualization for lantern outputs stored in HDF5 files.

Features

• 3D scatter plot of spacepoints colored by prong
• 2D image crops arranged in (2,3) grid for each prong
• Navigation buttons to move through events

Requirements

Package	Purpose
h5py	Reading HDF5 data files
numpy	Numerical array operations
dash	Web application framework
plotly	Interactive plotting

Installation

pip install h5py numpy dash plotly

Usage

python visualize_lantern_outputs.py <hdf5_file> [--start-entry N] [--port PORT]

Arguments

• hdf5_file - Path to the HDF5 file containing lantern outputs
• --start-entry N - Starting entry index (default: 0)
• --port PORT - Port for Dash server (default: 8050)

Example

python visualize_lantern_outputs.py output.h5 --start-entry 10 --port 8080

Once running, open your browser to http://localhost:8050 (or the specified port) to view the visualization.