a command line pogram to decode RAW image formats from digital cameras 'dcraw' is a command line program which is able to read numerous raw image formats produced by digital cameras. dcraw converts these images into the standard PPM and TIFF image formats. The conversion is sometimes referred to as developing a raw image (by analogy with the process of film development) since it renders raw image sensor data (a "digital negative") into a viewable form. dcraw is also able to extract thumbnails from a raw image in JPEG format as well as information about the image (camera model, shutter speed, etc.).