CR3 Viewer is a Python application built using Tkinter and PIL, designed to view and save Canon Raw version 3 (CR3) files. It provides a simple GUI to open, display, and save CR3 files as JPEG or PNG images.

• Open CR3 Files: Browse and select one or multiple CR3 files to view.
• Display Images: Thumbnails of the selected CR3 files are displayed in tabs for easy navigation.
• Save Images: Save the currently viewed CR3 file as a JPEG or PNG image.

To run CR3 Viewer, you need Python installed on your system along with the following packages:

• Tkinter (usually comes with Python)
• PIL (Pillow)
• rawpy
• imageio
• tkinterdnd2

1. Ensure you have Python installed on your system.
2. Install the required Python packages using pip:

pip install Pillow rawpy imageio tkinterdnd2

To start the application, run the script with Python:

python main.py

Once the application is running:

• Click on the New button to open and select CR3 files.
• The selected files will be opened in new tabs within the application window.
• Click on a tab to view the image.
• Click on the Save button to save the currently displayed image as a JPEG or PNG file.

Contributions to CR3 Viewer are welcome. Please feel free to fork the repository, make changes, and submit pull requests.

CR3 Viewer is released under the MIT License. See the LICENSE file for more details.