Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.0280888606426
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 1, worker: A3DRZTFFWOKXCT
darker: 2 (eq: False, dd: True), confidence: 0, worker: A3D4U1VY8VSDI6 (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: AET2U31SXUAPM
darker: 2 (eq: False, dd: True), confidence: 0, worker: A2EKPA2DR5VSA8
darker: E (eq: True, dd: None), confidence: 2, worker: A3163PFOUKXQKA
darker: E (eq: True, dd: None), confidence: 2, worker: A2HCXQ6WTTL79C
(0: guessing, 1: probably, 2: definitely)