CR2 (Canon Raw 2) is a proprietary raw image format used by Canon digital cameras. It records unprocessed data from the sensor, providing high flexibility for post-processing. Based on the TIFF specification, CR2 files are standard for professional Canon photography but require specific drivers or software to view and edit. Sample CR2 files are used to test support for Canon cameras in image management software. Developers use them to verify that their applications can correctly interpret Canon's specific color science and sensor data. They are also used to test the extraction of embedded thumbnail previews and shooting data.