Hallucinations (in AI Large-language Models)Made up data presented as fact in generated text that is plausible but are, in fact, inaccurate or incorrect. These fabrications can also include fabricated references or sources.
Heat TreatmentHeat treatment is the process in which heat is offered to a gemstone for the purpose of improving its colour appearance and clarity.
HSL (Hue-Saturation-Lightness)A colour space used to represent images based on polar coordinates. Intensity is the vertical axis of the polar system, hue is the relative angle, and saturation is the planar distance from the axis. HSL is thought to be more intuitive to manipulate than RGB space.
HSV (Hue-Saturation-Value)A colour space that describes colour using three basis components: hue, saturation and brightness.