Värialueen
Värialueen is a term used in color science and digital imaging to describe a contiguous region in a color space defined by ranges of hue, saturation, and lightness, or by a boundary in a perceptual space such as Lab or Lch. The concept helps categorize and analyze colors that belong to a particular target group, such as skin tones, foliage, or skies.
Definition and space: It can be defined within various color models, including RGB, HSV, CIELAB, or CIECAM02.
Applications: It is used for segmentation, color grading and correction, automated color matching, and quality control
Methods and challenges: Identification relies on color histograms, clustering, or region-growing algorithms. Perceptual uniformity and metamerism
Relation to other concepts: Värialueen is related to, but distinct from, a device gamut or color space.