This format is used by Olympus cameras to create RAW images. These files record data from the camera matrix that are used to generate the image. It contains raw data about contrast, saturation, color temperature, as well as metadata. The exposure and white balance can be changed in an ORF image while maintaining the level of detail and quality of the photo.
This bitmap image format was created for storing images taken in HDR mode, which provides a high dynamic contrast ratio. It may have either a 32- or 16-bit pixel structure. It is used for high-quality graphics with rich bitmap images, with or without lossy compression.