RGBE refers to the red, green, blue, and exposure format used in digital imaging. It is mainly used in high dynamic range imaging (HDRI) to capture and manipulate images that have a wide range of brightness levels. Synonyms for RGBE in the world of digital imaging could include "high dynamic range," "HDR," or "color space." Some related terms that are commonly used in this context include color gamut, color profile, and color range. These terms encompass the technical aspects of digital imaging and are often used interchangeably when referring to the various elements that contribute to the creation and manipulation of digital images.