X3F

X3F (or Sigma X3F, or Foveon X3F) is a raw image format used by some Sigma digital cameras that use a "Foveon sensor".

Identification
Files begin with ASCII signature " ".

Specifications

 * http://www.photofo.com/downloads/x3f-raw-format.pdf
 * http://www.photofo.com/x3f-raw-format/

Software

 * See also Cameras and Digital Image Sensors: Software
 * Konvertor
 * Proxel X3F Tools (from archive.org)
 * https://github.com/rolkar/x3f
 * X3F Decoder and Tools
 * X3F Tool

Sample files

 * RAW-Samples: Sigma
 * RAW-Samples: Polaroid
 * http://digikam3rdparty.free.fr/TEST_IMAGES/RAW/HORIZONTAL/ → *.x3f

Links

 * libopenraw: Foveon X3F
 * Foveon web site
 * Wikipedia: Foveon X3 sensor