Fluke Thermal Reader

A Python library for reading and analyzing Fluke thermal imaging files in .is2 format.

Package: fluke-thermal-reader · Import: import fluke_thermal_reader or from fluke_thermal_reader import read_is2

---

Features

• .is2 reading: Full parsing of Fluke thermal imaging files (.is2)
• Temperature conversion: Raw counts to temperature (°C) with emissivity and reflected background correction (radiative formula)
• Metadata: Camera model, dimensions, emissivity, transmission, background temperature, min/max/avg from file and from JSON when present
• Minimal dependencies: Only numpy
• Tested and working: Fluke Ti480P and Ti300

---

Installation

From PyPI (when published)

pip install fluke-thermal-reader

From source (development or local release)

From the repository root:

pip install -e .

Or in non-editable mode:

pip install .

---

Quick start

from fluke_thermal_reader import read_is2

# Load a .is2 file
data = read_is2("thermal_image.is2")

# Thermal matrix (2D, °C)
thermal_data = data["data"]
print(f"Temperature range: {thermal_data.min():.1f}°C - {thermal_data.max():.1f}°C")

# Metadata
print(f"Camera: {data['CameraModel']}")
print(f"Size: {data['size']}")  # [width, height]
print(f"Emissivity: {data['Emissivity']}")
print(f"Background temperature: {data['BackgroundTemp']}°C")

Plot with matplotlib

import matplotlib.pyplot as plt
from fluke_thermal_reader import read_is2

data = read_is2("thermal_image.is2")
plt.imshow(data["data"], cmap="coolwarm", aspect="equal")
plt.colorbar(label="Temperature (°C)")
plt.title(f"Thermal image — {data['CameraModel']}")
plt.show()

---

Returned data structure (read_is2)

Key	Type	Description
data	2D ndarray	Temperature in °C per pixel
FileName	str	File name
CameraModel	str	Thermal camera model
CameraSerial	str	Serial number
size	[w, h]	Image dimensions
MinTemp, MaxTemp, AvgTemp	float	From file/JSON when present
Emissivity	float	Emissivity
Transmission	float	Transmission
BackgroundTemp	float	Background temperature
thumbnail_path	str / None	Thumbnail path (if present)
photo_path	str / None	Visible photo path (if present)

---

Requirements

• Python 3.8+
• numpy >= 1.20.0

For visualization: matplotlib (optional).

---

Tested camera models

Tested and working with:

• Fluke Ti480P
• Fluke Ti300

Other Fluke .is2 files may work; feedback and sample files for additional models are welcome.

---

Project structure

Fluke_Python/
├── fluke_thermal_reader/    # Main package
│   ├── __init__.py
│   ├── reader.py            # read_is2, FlukeReader
│   ├── parsers.py           # IS2 parser
│   ├── utilities.py         # UnitConversion, calc_equation
│   ├── models.py
│   └── cli.py
├── examples/                 # Usage examples
├── tests/                    # Tests
├── pyproject.toml
├── requirements.txt
└── README.md

---

Development and testing

# Editable install
pip install -e ".[dev]"

# Run tests
pytest

---

Publishing to PyPI

1. Install build tools

   pip install build twine
   

2. Bump version in pyproject.toml and fluke_thermal_reader/__init__.py (e.g. 0.2.1).

3. Build the package (from repo root)

   python -m build
   

   This creates dist/ with a .tar.gz (sdist) and a .whl (wheel).

4. Check archives (optional)

   twine check dist/*
   

5. Upload to PyPI

   twine upload dist/*
   

   Use your PyPI credentials (create an API token at pypi.org/manage/account/token/; username __token__, password = token).

After upload, users can install with:

pip install fluke-thermal-reader

---

read_is3 (Future Work)

read_is3(file_path) is planned for Fluke IS3 (video) files.

• Current status: Not implemented — calling it raises NotImplementedError.
• Scope: Video streams (multiple thermal frames), video-level metadata.
• Documentation: The returned data structure will be defined once implementation starts.

If you are interested in IS3 support, please open an issue with sample files and requirements.

---

License

See the LICENSE file in the repository.

---

Changelog

0.2.0

• Stable .is2 parser with temperature conversion (emissivity + background temperature)

0.1.x

• Initial release, basic .is2 support