Convert FITS to PNG

Understanding FITS and PNG file formats

FITS (Flexible Image Transport System) is a digital file format widely used in astronomy for storing, transmitting, and processing scientific and astronomical images. It supports metadata and multi-dimensional data arrays, making it ideal for scientific analysis.

PNG (Portable Network Graphics) is a popular raster image format known for its lossless compression and support for transparency. PNG is commonly used for web graphics, digital images, and general image sharing.

Why convert FITS to PNG?

Converting FITS files to PNG format allows for easier sharing, viewing, and presentation of astronomical images outside specialized scientific software. PNG files are widely supported by image viewers, editors, and web browsers.

Best software for FITS to PNG conversion

One of the most reliable tools for converting FITS to PNG is SAOImage DS9, a free astronomical imaging and data visualization application. Another excellent option is FITS Liberator, which is specifically designed for converting and processing FITS images for public outreach and publication.

How to convert FITS to PNG using SAOImage DS9

1. Download and install SAOImage DS9.
2. Open DS9 and go to File → Open to load your FITS file.
3. Adjust the image display settings as needed (scaling, color map, etc.).
4. Go to File → Save Image As → PNG to export the current view as a PNG file.

Alternative: Using FITS Liberator

1. Download and install FITS Liberator.
2. Open your FITS file in FITS Liberator.
3. Adjust the stretch and scaling options to enhance the image.
4. Click Save As and choose PNG as the output format.

Online converters

For quick conversions without installing software, online tools like Aconvert can convert FITS to PNG. However, these may have file size limits and fewer customization options.

Summary

Converting FITS to PNG makes astronomical images accessible for general use. SAOImage DS9 and FITS Liberator are recommended for high-quality, customizable conversions.