CIE color space 1 Color 1 Color Perception 1 Colorimetry 1 Esthetics, Dental 1 Humans 1 Image Processing, Computer-Assisted 1 Incisor 1 Observer Variation 1 Optics and Photonics 1 Photography, Dental 1 Spectrophotometry 1 Tooth Bleaching 1 Tooth Discoloration 1 Tooth whiteness Tooth yellowness 1 Visual assessments 1 Whiteness index 1 article 1 classification 1 color 1 color vision 1 colorimetry 1 dental procedure 1 dentistry 1 diagnostic imaging 1 digital imaging 1 human 1 image processing 1 incisor 1