Convert JPG to FITS

Understanding JPG and FITS file formats

JPG (or JPEG) is a widely used compressed image format, popular for digital photography and web graphics due to its efficient compression and broad compatibility. FITS (Flexible Image Transport System), on the other hand, is a specialized file format primarily used in astronomy. It stores scientific data, including images and metadata, in a way that preserves precision and supports complex data structures.

Why convert JPG to FITS?

Converting a JPG image to FITS is often necessary when integrating standard images into astronomical workflows or scientific analysis tools that require the FITS format. FITS files can store additional metadata and support higher bit depths, making them suitable for scientific applications.

How to convert JPG to FITS

To convert a JPG image to a FITS file, you need software that supports both formats and can handle the necessary data transformation. The process typically involves importing the JPG, adjusting image properties if needed, and exporting or saving as FITS.

Recommended software for JPG to FITS conversion

• FITS Liberator: A free tool developed by ESA, ESO, and NASA, designed specifically for converting standard image formats (including JPG) to FITS. It allows you to import a JPG and export as FITS with customizable settings.
• GIMP with FITS plugin: GIMP, a popular open-source image editor, can open JPG files. With the FITS plugin installed, you can export images as FITS. Use File → Export As and select .fits as the output format.
• ImageMagick: A command-line tool that supports a wide range of formats, including JPG and FITS. Use the command: convert input.jpg output.fits.

Step-by-step conversion using FITS Liberator

1. Download and install FITS Liberator from the official website.
2. Open the program and use File → Open to select your JPG image.
3. Adjust image settings as needed for your scientific requirements.
4. Go to File → Save As and choose FITS as the output format.
5. Save the file to your desired location.

Considerations and tips

• JPG is a lossy format, so some image data may already be lost before conversion.
• FITS supports higher bit depths and metadata; consider adding relevant information during export.
• For scientific accuracy, use the highest quality JPG source available.