Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.882206200869
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 2, worker: ATPCAF2RU1G4C (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: APROFW08F7Z34
darker: E (eq: True, dd: None), confidence: 2, worker: A3UC4JITM1QD1M
darker: E (eq: True, dd: None), confidence: 0, worker: A3TVDFJ22T1FFN (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A8DFFGPH3G3V5
darker: E (eq: True, dd: None), confidence: 2, worker: A3DY9JPLPQUN1O
darker: E (eq: True, dd: None), confidence: 2, worker: AW0K78T4I2T72
(0: guessing, 1: probably, 2: definitely)