PNG to HDR Converter

DOWNLOAD: https://github.com/profmitchell/png2hdri/releases/tag/1.0

This repository provides two Python applications to convert PNG images into HDR format with optional upscaling. Both a Tkinter GUI version and a Streamlit modern web-based version are included for flexibility and ease of use.

Features

• Convert PNG to HDR: Save HDR files directly to your Desktop.
• Batch Processing: Select multiple PNG files for conversion.
• Upscaling Options: Enable optional upscaling with predefined factors (0.5x, 1x, 1.5x, 2x, etc.).
• Tkinter GUI:
  • Robust, compact UI with a checkbox and dropdown for upscaling.
  • Help button with instructions and credits.
• Streamlit Version:
  • Modern and minimalistic web-based UI.
  • Streamlined workflow for selecting files and options.

Installation

Prerequisites

1. Python 3.8+
2. Required Python libraries:

   pip install opencv-python pillow streamlit

Files

• png_to_hdr_tkinter.py: Tkinter-based GUI version.
• png_to_hdr_streamlit.py: Streamlit-based modern version.

Optional Icon

To add a custom icon to the Tkinter application, ensure the icon file (icon.png) is located at:

/Users/mitchellcohen/Desktop/icon.png

Usage

Tkinter Version

1. Run the application:

   python png_to_hdr_tkinter.py

2. Use the GUI to select options and files.

Packaging as Executable

To package the Tkinter version as a standalone executable:

pyinstaller --onefile --windowed --icon=/Users/mitchellcohen/Desktop/icon.png png_to_hdr_tkinter.py

The packaged file will be in the dist/ folder.

Streamlit Version

1. Run the application:

   streamlit run png_to_hdr_streamlit.py

2. Open the provided localhost link in your browser.

Packaging as Executable

To package the Streamlit version as a standalone executable:

pyinstaller --onefile png_to_hdr_streamlit.py

Features Walkthrough

Tkinter UI

• Upscaling Options: Enable upscaling with a checkbox and select the scale factor (0.5x, 1x, 1.5x, etc.) using a dropdown menu.
• Help Button: Displays instructions and credits.
• File Selection: Use the "Select PNG Files" button to choose files.
• Batch Processing: Select multiple files at once for conversion.

Streamlit UI

• Drag and Drop: Upload PNG files via the drag-and-drop interface.
• Upscaling Options: Enable upscaling with a checkbox and select the scale factor.
• Modern Design: Minimal and responsive web-based interface.

Credits

Developed by Mitchell Cohen Newton, MA, 2025

Visit: www.mitchellcohen.net

License

This project is licensed under the MIT License. See the LICENSE file for details.