ARW is a proprietary raw image file format used by Sony Alpha cameras. Like other raw formats, it captures unprocessed data from the sensor, allowing for significant post-production flexibility. ARW files are uncompressed or losslessly compressed to ensure maximum image quality for professional photography. Sample ARW files are used to test image processing support for Sony cameras. Developers use them to verify that their software handles Sony's specific sensor outputs and color profiles correctly. They are also used to test raw conversion algorithms and to ensure compatibility with Sony's ecosystem of tools.